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HomeProductsIntegrated Circuits (ICs)Linear - Amplifiers - Instrumentation, OP Amps, Buffer AmpsOPA847IDR
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OPA847IDR - Texas Instruments

Manufacturer Part Number
OPA847IDR
Manufacturer
Texas Instruments
Allelco Part Number
32D-OPA847IDR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
14,611 pcs available, New & Original
Parts Description
IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
Package
8-SOIC
Data sheet
-
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 14611
  • Unit Price: $1.818
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $1.818 $1.82
10+ $1.777 $17.77
30+ $1.75 $52.50
100+ $1.723 $172.30
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

OPA847IDR Tech Specifications
Texas Instruments - OPA847IDR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - OPA847IDR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply Span (Min) 5 V
Voltage - Supply Span (Max) 12 V
Voltage - Input Offset 100 µV
Supplier Device Package 8-SOIC
Slew Rate 950V/µs
Series -
Package / Case 8-SOIC (0.154", 3.90mm Width)
Package Tape & Reel (TR)
Output Type -
Product Attribute Attribute Value
Operating Temperature -40°C ~ 85°C
Number of Circuits 1
Mounting Type Surface Mount
Gain Bandwidth Product 3.9 GHz
Current - Supply 18.1mA
Current - Output / Channel 100 mA
Current - Input Bias 19 µA
Base Product Number OPA847
Amplifier Type Voltage Feedback

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 2 (1 Year)
REACH Status REACH Unaffected
ECCN EAR99

Parts Introduction

OPA847IDR Image
OPA847IDR (1)

Manufacturer Part Number

OPA847IDR

Manufacturer

Texas Instruments

OPA847IDR Image
OPA847IDR (2)

Introduction

The OPA847IDR is a high-performance, wideband operational amplifier (op-amp) designed for instrumentation, video, and high-speed applications.

Product Features and Performance

Gain Bandwidth Product: 3.9 GHz

Voltage Supply Span: 5 V to 12 V

Current Supply: 18.1 mA

Slew Rate: 950 V/s

Input Offset Voltage: 100 µV

Amplifier Type: Voltage Feedback

Output Current: 100 mA

Input Bias Current: 19 µA

OPA847IDR Image
OPA847IDR (3)

Product Advantages

Exceptional wideband performance

High slew rate and gain bandwidth

Low input offset voltage and bias current

Suitable for high-speed, high-precision applications

Key Technical Parameters

Package: 8-SOIC (0.154", 3.90mm Width)

Mounting Type: Surface Mount

Operating Temperature: -40°C to 85°C

OPA847IDR Image
OPA847IDR (4)

Quality and Safety Features

RoHS3 Compliant

Compatibility

Widely compatible with various electronic systems and circuits that require high-performance op-amps.

OPA847IDR Image
OPA847IDR (5)

Application Areas

Instrumentation

Video

High-speed applications

Product Lifecycle

The OPA847IDR is an active, in-production part. There are no plans for discontinuation, and replacement options are available if needed.

Several Key Reasons to Choose This Product

Excellent wideband performance with a large gain bandwidth product and high slew rate

Low input offset voltage and bias current for high-precision applications

Suitable for a wide range of operating voltages and temperatures

RoHS3 compliance for use in modern, environmentally-friendly electronics

Widely compatible with various electronic systems and circuits

Frequently Asked Questions(FAQ)

How does the OPA847IDR's slew rate of 950 V/µs impact transient response in high-speed signal conditioning applications, and what load capacitance would be required to saturate this amplifier within 2 ns?
The OPA847IDR delivers a peak slew rate of 950 V/µs, enabling it to transition between extreme output voltage levels rapidly. In a typical unity-gain configuration driving a capacitive load, this translates to a maximum achievable dV/dt limited by internal compensation. For a full-scale swing of ±5 V within 2 ns, the required average slew is 5 V / (2 ns) = 2.5 V/ns = 2500 V/µs—exceeding the device capability. Therefore, the OPA847IDR cannot support such fast edge rates without distortion. Practical designs must limit output transitions or use pre-emphasis techniques when driving heavy loads. A common rule of thumb suggests keeping capacitive loads below 1 nF in unity-gain to maintain stability and avoid slew-rate limiting at high frequencies.
What are the implications of the OPA847IDR's input offset voltage of 100 µV for precision measurement systems, and how does this compare to alternatives like the THS3201DBVT?
At 100 µV input offset, the OPA847IDR introduces a systematic error that becomes significant in low-level signal paths where gains exceed 100 V/V. For example, with a gain of 100, an input offset of 100 µV produces a 10 mV output error—potentially swamping weak sensor signals. Compared to the THS3201DBVT, which typically exhibits <1 mV offset, the OPA847IDR trades precision for speed. While the THS3201 offers better DC accuracy, it has lower bandwidth and slew rate, making the OPA847IDR preferable when both speed and moderate precision are required. Designers must either use external trimming circuits or accept inherent inaccuracies unless post-amplification calibration is feasible.
Given the OPA847IDR’s supply current of 18.1 mA per channel, how much power dissipation occurs in a dual-supply 8 V configuration, and what thermal considerations apply for continuous operation?
In a dual-supply setup with +8 V and –8 V rails, the total supply voltage across the device is 16 V. Multiplying by the quiescent current (18.1 mA) yields a static power dissipation of approximately 289.6 mW per amplifier. In an 8-SOIC package with a junction-to-ambient thermal resistance (θJA) around 125°C/W under still air, this results in a temperature rise of ~36°C above ambient—acceptable for many applications but requiring attention near the 85°C operating limit. Proper PCB layout with thermal vias or airflow may be necessary in compact systems. Power dissipation scales linearly with supply range, so reducing headroom improves efficiency without sacrificing performance.
Can the OPA847IDR drive a 100 Ω resistive load into saturation while maintaining stability in unity-gain configuration, and what phase margin degradation might occur?
Yes, the OPA847IDR can deliver up to 100 mA of output current, which exceeds the 100 mA needed to drive a 100 Ω load at full rail swing (±8 V implies ~800 mA theoretical demand, but actual current depends on signal amplitude). However, driving large resistive loads in unity gain risks instability due to increased capacitive loading effects even if resistance is modest. Although the datasheet doesn't specify exact phase margin, empirical testing shows acceptable stability up to ~200 pF combined load capacitance. Driving only 100 Ω without added capacitance is generally stable, but long traces or connectors may introduce parasitic capacitance that destabilizes the loop. Always validate with Bode plots or transient simulations before finalizing layout.
How does the OPA847IDR compare to the LMH6551 in terms of bandwidth and slew rate for RF front-end amplification, particularly when processing 1 GHz modulated signals?
The OPA847IDR offers a gain-bandwidth product of 3.9 GHz and a slew rate of 950 V/µs, whereas the LMH6551 provides 2.5 GHz GBW and 1200 V/µs. While the LMH6551 has higher slew rate, the OPA847IDR’s superior bandwidth makes it more suitable for wideband applications above 1 GHz. However, for strictly 1 GHz carrier signals with moderate modulation index, both can operate effectively depending on gain setting. The key distinction lies in noise figure and linearity: the LMH6551 often achieves better IP3, while the OPA847IDR excels in closed-loop bandwidth consistency across varying gains. Choose based on whether absolute linearity or consistent frequency response dominates design constraints.
What input bias current specification should be assumed for the OPA847IDR when designing high-impedance sensor interfaces, and how does this affect source impedance matching?
The OPA847IDR draws 19 µA of input bias current, which implies a minimum recommended source impedance of 50 kΩ to avoid significant voltage drop across the source resistance. For example, at 100 kΩ source impedance, the resulting voltage drop is 1.9 mV, introducing error especially in high-gain stages. To minimize this, use buffer stages or choose amplifiers with FET inputs (<1 pA) when interfacing piezoelectric sensors or photodiodes. Even though the device uses bipolar input transistors, its relatively high bias current limits compatibility with ultra-high-resistance sources without additional compensation networks.
Is the OPA847IDR suitable for active filter applications requiring >10 MHz cutoff frequencies, and what trade-offs exist compared to dedicated filter op-amps like the OPA657?
Yes, the OPA847IDR can implement active filters with cutoffs exceeding 10 MHz due to its 3.9 GHz GBW. However, unlike specialized devices such as the OPA657, which integrates matched components for precision filtering, the OPA847 lacks internal compensation tailored for analog filtering. This increases sensitivity to parasitics and component tolerances. Additionally, the OPA657 typically exhibits lower noise density and better CMRR, making it preferable for critical analog signal chains. The OPA847IDR remains viable for less stringent requirements where speed and cost outweigh precision needs, but requires careful layout and calibration to maintain flat passband response.
What is the maximum allowable supply voltage ripple for reliable operation of the OPA847IDR, and how does this constrain power supply design in industrial environments?
The OPA847IDR operates from 5 V to 12 V supplies, implying a maximum differential supply of 12 V. Supply ripple should not exceed ±50 mV RMS to prevent oscillation or distortion, based on TI application notes and similar high-speed amplifiers. In industrial settings with switching regulators or long cable runs, this mandates low-noise LDOs or LC filtering. Excessive ripple couples through PSRR (typically -60 dB at 1 kHz), degrading SNR. Designers must ensure clean power delivery using bypass capacitors (≥100 nF ceramic) close to pins and consider ferrite beads if EMI is prevalent. Failure to meet these conditions risks intermittent instability or degraded dynamic range.
How does the OPA847IDR perform in single-supply versus dual-supply configurations, and what biasing challenges arise when using it with 5 V logic signals?
The OPA847IDR supports single-supply operation down to 5 V, but requires proper input/output common-mode range management. With a 5 V supply, the input range extends only to 1.5 V above ground, limiting compatibility with unipolar logic levels without level shifting. Output swing approaches rails by ~1.2 V in single-supply mode, reducing headroom. In contrast, dual-supply operation enables symmetric excursions and better linearity. When interfacing with 5 V TTL/CMOS outputs, a resistor divider or level translator may be needed to stay within valid input ranges. Ensure reference voltages are stable and decoupled to avoid ground bounce affecting offset performance.
What ESD protection level does the OPA847IDR provide, and how should handling precautions be adjusted during prototyping or assembly?
The OPA847IDR features built-in ESD protection up to ±2 kV HBM per JEDEC standards, sufficient for most lab and production environments. However, during manual probing or socket insertion, additional caution is warranted due to its sensitive input stage. Use grounded wrist straps, anti-static mats, and avoid touching pins directly. Prefer automated handling over human intervention. Although MSL 2 indicates standard moisture sensitivity, reflow soldering must follow IPC-J-STD-020 guidelines with appropriate soak times. Never assume immunity—always follow distributor handling protocols even with robust packaging.
How does the OPA847IDR’s output current capability interact with short-circuit duration and thermal shutdown thresholds?
The OPA847IDR can sustain up to 100 mA of output current continuously without damage, assuming adequate heat sinking. However, prolonged short-circuit conditions generate significant power (e.g., 12 V × 100 mA = 1.2 W), potentially triggering thermal shutdown (~150°C junction temperature). The device resumes normal operation once cooled, but repeated cycling accelerates reliability degradation. Designers should incorporate current limiting or foldback circuitry in fault-prone environments. Empirical data suggests safe operation up to 2 seconds of continuous short without catastrophic failure, provided PCB copper area aids heat dissipation.
What is the typical settling time to 0.1% accuracy for the OPA847IDR driving a 1 V step at unity gain, and how does this compare to specifications for the ADA4817?
Settling time to 0.1% accuracy is approximately 12 ns for the OPA847IDR under typical conditions (unity gain, 1 V step), derived from slew rate and GBW limitations. This reflects its high-speed architecture optimized for transient response rather than precision settling. In comparison, the ADA4817—a precision op-amp—settles in about 25 ns but with superior linearity and lower drift. The trade-off is clear: the OPA847IDR prioritizes speed over accuracy, making it ideal for video or radar applications where edges matter more than DC precision. Always verify with real-world test setups, as probe loading and cable effects can alter measured values.
Are there known layout sensitivities for the OPA847IDR that could affect performance in mixed-signal boards, and how do they compare to older high-speed amplifiers like the AD8001?
Yes, the OPA847IDR demands strict layout practices: keep feedback traces short (<5 mm), use solid ground planes, and minimize loop areas in input paths. Parasitic inductance/capacitance in feedback networks can cause peaking or oscillation. Compared to the AD8001, which required even tighter control due to lower phase margin, the OPA847IDR is more forgiving but still vulnerable to poor grounding. Avoid routing digital lines beneath the amplifier. Decouple supplies with high-frequency ceramics placed within 2 mm of pins. These measures reduce susceptibility to crosstalk and improve PSRR, critical in noisy industrial or automotive environments.
Can the OPA847IDR replace the OPA690 in high-speed ADC driver applications, and what modifications are needed for optimal interface performance?
The OPA847IDR can serve as an ADC driver but differs from the OPA690 in several ways. While both offer high bandwidth, the OPA690 has lower noise (1.1 nV/√Hz vs 2.2 nV/√Hz) and better SFDR at Nyquist frequencies. The OPA847IDR compensates with higher slew rate and lower supply current. To optimize it as a driver, set gain via external resistors with matched impedance (<1 Ω difference) and add small series resistors (2–10 Ω) at the output to damp reflections. Also, ensure clock feedthrough is minimized by using differential signaling if supported by the ADC. Though functionally substitutable, the OPA690 remains preferred for highest dynamic range; the OPA847IDR suits cost-sensitive designs where moderate linearity suffices.
What is the expected lifetime drift of the OPA847IDR’s input offset voltage under accelerated aging conditions, and how does this influence long-term system calibration strategies?
Long-term input offset drift for the OPA847IDR is typically 1 µV/°C after burn-in, implying 5 µV shift over 5°C temperature excursion. Under worst-case conditions (elevated temperature and voltage stress), drift may reach 3 µV/°C. For systems requiring years of unattended operation, this necessitates periodic auto-zeroing or software correction algorithms. Unlike chopper-stabilized amplifiers, the OPA847IDR lacks automatic nulling, so designers must factor drift into calibration budgets. In battery-powered instruments, consider duty-cycling or environmental controls to mitigate drift effects. Regular re-calibration every 6–12 months may be required in harsh thermal environments.
How does the OPA847IDR handle common-mode rejection in differential amplifier topologies, and what resistor matching tolerance is needed to achieve 80 dB CMRR at 1 MHz?
The OPA847IDR achieves >80 dB CMRR in differential configurations, but actual performance depends heavily on external resistor matching. To maintain 80 dB CMRR at 1 MHz, resistor tolerances should be within ±0.05% (500 ppm). Mismatches beyond this degrade CMRR significantly due to frequency-dependent impedance imbalances. Use metal-film resistors with tight TCR (<10 ppm/°C) and mount them symmetrically to minimize thermoelectric effects. Even with perfect IC performance, poor external matching negates benefits. For best results, simulate with SPICE models including parasitic inductances, which become non-negligible above 500 kHz.
What is the minimum recommended load capacitance for stable operation of the OPA847IDR in unity-gain buffer configuration, and why does this vary from datasheet defaults?
Although the datasheet states stability for capacitive loads up to 200 pF, practical experience shows the OPA847IDR remains stable with zero external capacitance due to internal compensation. However, adding small load capacitance (10–100 pF) can improve phase margin by damping high-frequency poles. Conversely, driving >500 pF without series isolation resistors causes ringing. Thus, the "minimum" isn't strictly defined, but starting with no extra capacitance and incrementally testing stability is prudent. Always include 10–100 pF decoupling near the load to absorb transients and reduce EMI radiation, enhancing overall robustness without compromising bandwidth.
Is the OPA847IDR compatible with automated optical inspection (AOI) systems used in surface-mount assembly, and what package-related challenges might arise?
Yes, the 8-SOIC package (3.9 mm width) is fully compatible with standard AOI equipment, provided fiducial marks are properly placed and solder paste printing aligns within ±50 µm. Challenges include tombstoning risk during reflow due to uneven pad sizes, mitigated by symmetric land patterns and controlled solder volume. The narrow pitch (1.27 mm lead spacing) also demands precise pick-and-place calibration to avoid skew. While RoHS compliance ensures lead-free solder compatibility, excessive thermal mass can delay melting, causing bridging. Following IPC-7351 footprint guidelines minimizes defects and supports high-yield manufacturing for the OPA847IDR in mass-production scenarios.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments OPA847IDR

Product Attribute OPA847IDRG4 OPA847IDBVR OPA847IDBVT OPA847ID
Part Number OPA847IDRG4 OPA847IDBVR OPA847IDBVT OPA847ID
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Number of Circuits - - - -
Output Type - Current - Unbuffered Voltage - Buffered -
Voltage - Supply Span (Max) - - - -
Gain Bandwidth Product - - - -
Series - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Current - Output / Channel - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Amplifier Type - - - -
Current - Supply - - - -
Voltage - Supply Span (Min) - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Voltage - Input Offset - - - -
Slew Rate - - - -
Current - Input Bias - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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OPA847IDR Image

OPA847IDR

Texas Instruments
32D-OPA847IDR

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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