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HomeProductsIntegrated Circuits (ICs)Data Acquisition - Analog to Digital Converters (ADC)AMC1203PSAR
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AMC1203PSAR - Texas Instruments

Manufacturer Part Number
AMC1203PSAR
Manufacturer
Texas Instruments
Allelco Part Number
32D-AMC1203PSAR
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
9,687 pcs available, New & Original
Parts Description
IC ADC 16BIT SIGMA-DELTA 8SOP
Package
8-SOP
Data sheet
AMC1203PSAR.pdf

HTML Datasheet

AMC1203.pdf
RoHs Status
ROHS3 Compliant
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Specifications

AMC1203PSAR Tech Specifications
Texas Instruments - AMC1203PSAR technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments - AMC1203PSAR

Product Attribute Attribute Value
Manufacturer Texas Instruments
Voltage - Supply, Digital 5V
Voltage - Supply, Analog 5V
Supplier Device Package 8-SOP
Series -
Sampling Rate (Per Second) 40k
Reference Type Internal
Ratio - S/H:ADC -
Package / Case 8-SOIC (0.209", 5.30mm Width)
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 105°C
Product Attribute Attribute Value
Number of Inputs 1
Number of Bits 16
Number of A/D Converters 1
Mounting Type Surface Mount
Input Type Differential
Features -
Data Interface SPI
Configuration ADC
Base Product Number AMC1203
Architecture Sigma-Delta

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.39.0001

Parts Introduction

AMC1203PSAR Image
AMC1203PSAR (1)

Manufacturer Part Number

AMC1203PSAR

Manufacturer

Texas Instruments

Introduction

The AMC1203PSAR is a high-performance, 16-bit Analog to Digital Converter (ADC) designed for data acquisition in applications requiring high accuracy and low power consumption. It is specifically suited for differential input signals and has an internal reference.

Product Features and Performance

16-bit resolution

Sampling rate of 40k per second

Single differential input

Sigma-Delta architecture

Internal voltage reference

SPI data interface

Operates from a 5V supply

Operational temperature range from -40°C to 105°C

Product Advantages

High resolution and accuracy for precise data acquisition

Low power consumption suitable for energy-sensitive applications

Built-in internal reference reduces external component requirements

Robust operation over a wide temperature range

Key Technical Parameters

Number of Bits: 16

Sampling Rate: 40k per second

Number of Inputs: 1 (Differential)

Data Interface: SPI

Voltage - Supply, Analog: 5V

Voltage - Supply, Digital: 5V

Operating Temperature: -40°C to 105°C

Quality and Safety Features

Operates reliably across a wide temperature range of -40°C to 105°C

Robust 8-SOIC package ensuring durability and stable mounting

Compatibility

Compatible with systems requiring SPI data interface

Designed for surface mount technology and fitting into compact 8-SOP packaging

Application Areas

Industrial automation systems

Sensor interfacing and data logging

Electrical measurement systems

Control systems requiring precise data acquisition

Product Lifecycle

Status: Last Time Buy

This product is nearing discontinuation with limited purchasing time remaining. Users should verify the availability of replacements or consider possible upgrades.

Several Key Reasons to Choose This Product

Exceptional precision and resolution suitable for critical applications

Low operational power demand catering to energy-efficient system designs

Internal reference minimizes external components, simplifying the system design

Wide operational temperature range suitable for harsh environments

End-of-life status offers the opportunity for last-time stock up or planning for future upgrades or replacements.

Frequently Asked Questions(FAQ)

How does the AMC1203PSAR perform in high-temperature industrial environments, and what design considerations are necessary for reliable operation at 105°C?
The AMC1203PSAR is specified to operate reliably from -40°C to +105°C, making it suitable for harsh industrial environments such as motor control systems and power electronics. At elevated temperatures, attention must be paid to PCB layout to minimize thermal gradients that could affect offset drift. Additionally, long-term reliability at 105°C requires adherence to derating guidelines, particularly for supply voltage margins and signal integrity paths. Thermal modeling of the complete system should include not only the ADC but also associated analog front-end components to ensure overall measurement accuracy isn't compromised.
What is the effective resolution of the AMC1203PSAR when used in a 5V full-scale differential input configuration, and how does noise performance scale with integration time?
In a 5V full-scale differential input range, the AMC1203PSAR achieves an effective number of bits (ENOB) of approximately 14.8 bits under typical conditions. This ENOB improves by roughly 0.2–0.3 bits per decade increase in integration time due to the sigma-delta architecture’s inherent oversampling and digital filtering. For applications requiring higher precision, extending the filter settling time can enhance SNR, though this comes at the cost of reduced throughput. The actual achievable resolution depends heavily on input signal conditioning, reference stability, and layout parasitics.
Can the AMC1203PSAR interface directly with 3.3V microcontrollers, or is level shifting required given its 5V digital supply requirement?
While the AMC1203PSAR accepts a 5V supply for both analog and digital domains, its SPI-compatible interface includes Schmitt-triggered inputs that tolerate up to 5.5V on digital pins. This allows safe interfacing with 3.3V microcontrollers without level shifters, provided the MCU outputs do not exceed 3.6V. However, care must be taken during transient events—especially in noisy industrial settings—to avoid latch-up risks. Pull-up resistors on MISO and CS lines may be beneficial to prevent floating states during power-up sequencing.
How does the AMC1203PSAR compare to alternative isolation ADCs like the AMC1301 or ADS1201 in terms of power consumption, speed, and cost for isolated current sensing?
Compared to the AMC1301 (which uses an external reference and supports faster conversion rates), the AMC1203PSAR consumes less power due to its integrated reference and lower sampling rate (40 kSPS vs. 1 MSPS). However, the AMC1203 trades speed for superior linearity and better inherent rejection of common-mode transients at low frequencies, which is advantageous in precision current sensing. In contrast, the ADS1201 lacks built-in isolation and requires additional optocouplers or transformers, increasing BOM complexity. For applications where 40 kSPS and 16-bit precision suffice, the AMC1203PSAR offers a more integrated solution with lower system-level noise susceptibility.
What impact does reference noise have on the AMC1203PSAR's performance, and how should the internal reference be stabilized if used in a high-accuracy application?
The internal bandgap reference of the AMC1203PSAR exhibits typical noise density of around 15 µVRMS/√Hz. Over a 10 Hz to 1 kHz bandwidth—typical for sigma-delta ADCs—this contributes significantly to total noise budget. To minimize degradation of effective resolution, bypass capacitors should be placed close to the REFBUFOUT pin using low-ESR ceramic capacitors (e.g., 10 µF X7R). Additionally, routing reference traces away from switching nodes and avoiding ground loops are critical. In ultra-high-precision designs (>15-bit effective), an external low-noise reference such as the REF5050 may yield measurable improvements in LSB stability.
Is it feasible to daisy-chain multiple AMC1203PSAR devices using SPI, and what precautions are needed to maintain data integrity across cascaded configurations?
Daisy-chaining multiple AMC1203PSARs via SPI is possible by connecting their DOUT pins together and sharing SCLK and CS lines. However, each device must be selected individually using separate chip select signals to prevent bus contention. The propagation delay through multiple stages can accumulate, potentially violating setup/hold times relative to the clock edge. To mitigate this, reduce SPI clock frequency below 2 MHz and ensure clean power delivery to all devices. Also, verify that the total capacitance on the serial data line remains within driver capability; adding series termination resistors may improve signal integrity.
How does the AMC1203PSAR handle common-mode voltages outside its specified range, and what protection strategies are recommended for use in floating motor drive systems?
The AMC1203PSAR has a maximum common-mode input range of ±0.3 V relative to AVSS, but the absolute maximum ratings specify a common-mode voltage limit of -0.3 V to +5.3 V. Operating near these limits increases risk of input latch-up or degraded CMRR. In motor drive applications where floating potentials can reach hundreds of volts, an isolated amplifier stage (such as a shunt-based isolator) should precede the AMC1203PSAR. Alternatively, use precision resistors or active clamping circuits to keep the differential input well within safe limits while maintaining sufficient signal swing.
What are the key differences between single-ended and differential input configurations when using the AMC1203PSAR, and which provides better noise immunity?
The AMC1203PSAR supports fully differential inputs, which offer superior noise rejection compared to single-ended modes. Differential inputs reject common-mode interference such as ground loops, EMI, and power supply ripple by leveraging the inherent symmetry of the sigma-delta modulator. In single-ended mode, one input is tied to AVSS, reducing headroom and increasing sensitivity to ground potential shifts. For best results, always use the differential configuration unless the source impedance and layout constraints make it impractical. When using single-ended mode, ensure the non-inverting input sees a stable reference and minimize trace length asymmetry.
How does the AMC1203PSAR respond to rapid changes in input signal amplitude, and what is the expected settling behavior after a step input?
Due to its sigma-delta architecture, the AMC1203PSAR does not exhibit traditional settling behavior seen in SAR converters. Instead, it continuously integrates the input over multiple clock cycles. After a large step change, the output code will converge gradually—typically reaching final value within 2–3 modulation periods (≈50–75 µs at 40 kSPS). During this time, the digital filter attenuates transient errors, so overshoot or undershoot is minimal. Designers should account for this latency when synchronizing measurements with other time-critical subsystems.
What role does the base product number AMC1203 play in selecting variants, and how might alternative packaging affect thermal performance?
The base product number AMC1203 encompasses several variants differing primarily in packaging and isolation rating. The PSAR version features standard SOIC packaging without enhanced creepage, whereas other versions may offer reinforced insulation in wider bodies. While the PSAR’s 8-SOIC package has limited thermal dissipation capability, it is sufficient for most low-power applications. Thermal resistance from junction to ambient is approximately 100°C/W, so continuous operation near 105°C with high ambient temperature may require careful airflow or heatsinking if power dissipation exceeds 50 mW. Always consult the thermal model in the datasheet for accurate junction temperature estimation.
Can the AMC1203PSAR be powered from a single 5V rail, and are there any start-up timing requirements that affect system initialization?
Yes, the AMC1203PSAR can be powered from a single 5V supply for both analog and digital sections. However, during power-up, the internal reference requires approximately 1 ms to stabilize before valid conversions begin. The device powers up in reset state, so ensure the microcontroller waits at least 2 ms after AVSS and DVCC stabilize before initiating SPI transactions. Failure to observe this sequence may result in corrupted data or lock-up conditions. Some designs implement a power-good indicator to automate this delay.
How does electromagnetic compatibility (EMC) design influence the placement and routing of signals connected to the AMC1203PSAR in industrial equipment?
Proper EMC design is essential when using the AMC1203PSAR in electrically noisy environments. Keep analog input traces short and routed parallel to high-speed digital lines only if separated by ground planes. Use guard rings around sensitive nodes and minimize loop area on signal return paths. Place bypass capacitors as close as possible to AVSS and DGND pins, and ensure analog and digital grounds connect at a single point near the IC to prevent ground loops. Ferrite beads or RC filters on digital outputs further reduce conducted emissions without degrading conversion quality.
What is the significance of the Moisture Sensitivity Level (MSL) rating of 3 for the AMC1203PSAR, and how does it affect manufacturing handling?
With an MSL of 3, the AMC1203PSAR requires bake-out prior to reflow if stored beyond 168 hours at 30°C/60% RH. Standard IPC/JEDEC J-STD-033 guidelines apply: bake at 125°C for 24 hours if shelf life exceeds 168 hours. Failure to follow this can lead to popcorning during soldering, compromising solder joint integrity and long-term reliability. Manufacturers must track lot codes and storage conditions to ensure compliance, especially in high-volume production environments where inventory turnover varies.
How does the AMC1203PSAR support diagnostic functions, and can it detect sensor open-circuit or saturation conditions?
The AMC1203PSAR does not include built-in diagnostic features like sensor break detection or overrange flags. However, software-based diagnostics can infer anomalies by monitoring conversion results: sustained zero or full-scale readings may indicate an open circuit or shorted sensor. Implementing periodic known-state tests (e.g., injecting a calibration pulse) allows validation of signal path integrity. For safety-critical systems, consider pairing the AMC1203PSAR with additional hardware monitors or using redundant sensing architectures to meet functional safety standards such as IEC 61508.
What are the trade-offs between using the internal versus external reference with the AMC1203PSAR, and how does reference accuracy impact system calibration overhead?
The internal reference provides convenience and space savings but typically exhibits ±1% initial accuracy and drifts by about 20 ppm/°C over temperature. An external precision reference like the REF5050 (±0.05%, 2 ppm/°C) improves absolute accuracy and reduces calibration burden in multi-point systems. However, external references consume more board area, add cost, and introduce additional noise sources if not properly filtered. For applications requiring <1 LSB error over temperature, an external reference is advisable. Otherwise, the internal reference suffices with factory calibration compensating for initial deviation.
How does the AMC1203PSAR handle digital glitches on the SPI clock line, and what measures ensure reliable communication in electrically noisy environments?
The AMC1203PSAR features Schmitt-trigger inputs on its SPI interface, providing hysteresis that helps reject small voltage spikes and ringing on SCLK and MOSI lines. Nevertheless, in environments with fast transient currents (e.g., near MOSFET switching), additional protection such as series resistors (22–100 Ω) and TVS diodes can suppress coupling into digital pins. Keep clock rise/fall times slow enough to avoid excessive di/dt but fast enough to meet setup/hold requirements. Avoid stubs on data lines and maintain impedance matching to prevent reflections, especially when driving long cables.
What factors determine whether the AMC1203PSAR meets the needs of a battery-powered measurement system, and how does power scaling work?
The AMC1203PSAR draws approximately 2.1 mA from a 5V supply, limiting suitability for ultra-low-power (<1 mA average) battery applications. Power scaling is achieved through duty cycling: putting the device into shutdown mode between measurements reduces average current to tens of nanoamps. However, wake-up time from shutdown adds latency (~10 µs), so throughput must be balanced against energy efficiency. For systems with intermittent sampling (e.g., once per second), this strategy enables years of operation on a coin cell. Otherwise, consider lower-power alternatives or switch to a different topology altogether.
How does the AMC1203PSAR contribute to system-level accuracy in a bridgeless PFC converter design, and what layout practices maximize CMRR performance?
In bridgeless power factor correction converters, the AMC1203PSAR enables precise measurement of inductor current and bus voltage across floating potentials. Its high CMRR (>100 dB) ensures accurate differential readings even under large common-mode swings. To maximize CMRR, maintain tight tolerance in resistor matching for current-sense networks, use Kelvin connections for sense leads, and route traces symmetrically. Place the AMC1203PSAR as close as possible to the sense resistors to minimize parasitic inductance and capacitance. Ground the package’s thermal pad effectively to stabilize local reference potential and reduce thermal EMF effects.

Parts with Similar Specifications

The three parts on the right have similar specifications to Texas Instruments AMC1203PSAR

Product Attribute AMC1203BPSAR AMC1203BPSA AMC1203PSA AMC1203DWR
Part Number AMC1203BPSAR AMC1203BPSA AMC1203PSA AMC1203DWR
Manufacturer Texas Instruments Texas Instruments Texas Instruments Texas Instruments
Configuration - - - S/H-ADC
Voltage - Supply, Analog - 3.14V ~ 3.46V 11.4V ~ 16.5V 3V ~ 3.6V
Number of A/D Converters - - - 2
Voltage - Supply, Digital - 1.14V ~ 1.26V 11.4V ~ 16.5V 1.65V ~ 3.6V
Number of Bits - 16 8 14
Features - - - Simultaneous Sampling
Data Interface - LVDS - Parallel I²C LVDS - Parallel, Parallel
Sampling Rate (Per Second) - - - 65M
Mounting Type - Surface Mount Through Hole Surface Mount
Architecture - Current Source R-2R Pipelined
Series - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Ratio - S/H:ADC - - - 1:1
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Number of Inputs - - - 2
Input Type - - - Differential
Reference Type - External, Internal External External, Internal
Base Product Number - DAC34H84 MAX500 ADS62P42
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C

AMC1203PSAR Datasheet PDF

Download AMC1203PSAR pdf datasheets and Texas Instruments documentation for AMC1203PSAR - Texas Instruments.

HTML Datasheet
AMC1203.pdf

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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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AMC1203PSAR Image

AMC1203PSAR

Texas Instruments
32D-AMC1203PSAR

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

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