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HomeProductsIntegrated Circuits (ICs)Data Acquisition - Analog to Digital Converters (ADC)AD7988-5BCPZ-RL7
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AD7988-5BCPZ-RL7 - Analog Devices Inc.

Manufacturer Part Number
AD7988-5BCPZ-RL7
Manufacturer
Analog Devices, Inc.
Allelco Part Number
32D-AD7988-5BCPZ-RL7
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
2,405 pcs available, New & Original
Parts Description
IC ADC 16BIT SAR 10LFCSP
Package
10-LFCSP-WD (3x3)
Data sheet
AD7988-5BCPZ-RL.pdf

PCN Assembly/Origin

2.73KHz.pdf

Other Related Documents

Tape and Reel Packaging.pdf
RoHs Status
ROHS3 Compliant
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Specifications

AD7988-5BCPZ-RL7 Tech Specifications
Analog Devices Inc. - AD7988-5BCPZ-RL7 technical specifications, attributes, parameters and parts with similar specifications to Analog Devices Inc. - AD7988-5BCPZ-RL7

Product Attribute Attribute Value
Manufacturer Analog Devices, Inc.
Voltage - Supply, Digital 2.375V ~ 2.625V
Voltage - Supply, Analog 2.375V ~ 2.625V
Supplier Device Package 10-LFCSP-WD (3x3)
Series PulSAR®
Sampling Rate (Per Second) 500k
Reference Type External
Ratio - S/H:ADC 1:1
Package / Case 10-VFDFN Exposed Pad, CSP
Package Tape & Reel (TR)
Operating Temperature -40°C ~ 125°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 Pseudo-Differential
Features -
Data Interface SPI, DSP
Configuration S/H-ADC
Base Product Number AD7988
Architecture SAR

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

AD7988-5BCPZ-RL7 Image
AD7988-5BCPZ-RL7 (1)

Manufacturer Part Number

AD7988-5BCPZ-RL7

Manufacturer

Analog Devices

Introduction

Precision 16-bit SAR ADC with high sampling rate and low power consumption packaged for optimal integration

Product Features and Performance

16-bit resolution

Sampling rate up to 500k samples per second

Single pseudo-differential input

Serial Peripheral Interface (SPI) and DSP-compatible

Sample-and-hold circuit integral to ADC

Single 1:1 S/H-to-ADC ratio

One analog-to-digital converter embedded

Successive Approximation Register (SAR) architecture

External voltage reference required

Operational between 2.375V to 2.625V for both analog and digital supply

Able to function in temperatures ranging from -40°C to 125°C

10-VFDFN Exposed Pad, CSP package suitable for surface mount technology (SMT)

Product Advantages

High resolution and speed ideal for precision applications

Compact package suitable for space-constrained applications

Compatible with various digital interfaces for easy system integration

Extended temperature range supports demanding environmental conditions

Key Technical Parameters

16-bit resolution ADC

500k samples/second rate

Pseudo-differential input configuration

SPI and DSP data interface

SAR architecture

375V ~ 2.625V supply voltages needed

Quality and Safety Features

SAR architecture ensures reliable and deterministic conversions

VFDFN package designed for optimal thermal performance

Operational across wide temperature range ensuring stability in varying conditions

Compatibility

Compatible with digital systems employing SPI or DSP interfaces

External reference voltage allows flexibility with system design requirements

Application Areas

Precision measurement equipment

Data acquisition systems

Industrial process control

Portable medical devices

Communication systems

Product Lifecycle

Current product status is Active

No reported discontinuation, replacements or upgrades

Several Key Reasons to Choose This Product

Superior precision with 16 bits of resolution for accurate data output

Robust sampling rate of 500k samples/second facilitates rapid signal processing

Optimized for low voltage operation, offering power-efficiency in system design

Wide operating temperature range accommodates extreme operational environments

The compact footprint combined with surface mount packaging aids in miniaturization of end-products

Continuous product support as indicated by its active lifecycle status

Frequently Asked Questions(FAQ)

How does the AD7988-5BCPZ-RL7 handle voltage supply noise in high-impedance sensor applications, and what impact does this have on effective resolution at 500 kSPS?
The AD7988-5BCPZ-RL7 operates from a tightly regulated analog and digital supply range of 2.375V to 2.625V, which inherently limits susceptibility to wideband power supply variations. However, in high-impedance source conditions typical of thermocouples or piezoelectric sensors, even minor supply ripple can couple into the input signal path through charge injection and reference instability. At full 500 kSPS throughput, the internal sample-and-hold circuitry introduces transient loading that may interact with poorly filtered supplies. Designers should ensure local decoupling using low-ESR capacitors (e.g., 100 nF ceramic plus 10 µF tantalum) placed within 5 mm of the VDD pins to maintain effective resolution above 15 bits under real-world noise conditions.
What is the maximum allowable clock jitter on the SPI interface when operating the AD7988-5BCPZ-RL7 near its rated sampling rate, and how does this affect timing margin in noisy industrial environments?
While the AD7988-5BCPZ-RL7 specifies SPI compatibility with standard microcontrollers, its SAR architecture requires precise control over the conversion window relative to data acquisition. At 500 kSPS, each conversion occupies approximately 2 µs, leaving limited guard time for clock edges. In systems with long traces or shared bus architectures, clock jitter exceeding 20 ns RMS can cause aperture uncertainty that degrades ENOB by up to 1 bit. To mitigate this, use dedicated clock lines with series termination resistors and avoid routing parallel to switching signals. The DSP-compatible frame format also allows flexible setup times but cannot compensate for excessive propagation delay variation across multiple devices on the same bus.
Can the AD7988-5BCPZ-RL7 be used with an internal bandgap reference instead of an external precision source, and what performance trade-off does this introduce for long-term stability in temperature-controlled environments?
The AD7988-5BCPZ-RL7 does not include an internal reference; it explicitly requires an external reference such as the ADR4550 or LTZ1000. Using an integrated bandgap would violate the recommended circuit topology and degrade integral nonlinearity (INL) due to mismatch between the ADC’s internal comparator thresholds and the reference voltage. Even in stable thermal environments, a generic bandgap may exhibit drift exceeding 10 ppm/°C, causing offset errors equivalent to 1 LSB at 16 bits over a 50°C range. For applications demanding better than 0.01% accuracy, always pair the device with a low-noise, low-drift external reference and ensure proper layout isolation from digital switching currents.
How does the pseudo-differential input configuration of the AD7988-5BCPZ-RL7 improve common-mode rejection compared to single-ended inputs in industrial measurement systems, and what layout considerations are critical?
The pseudo-differential mode rejects signals common to both IN+ and IN– inputs while amplifying their difference, effectively canceling ground loops, EMI pickup, and amplifier offset voltages. This improves CMRR by approximately 20 dB relative to single-ended operation when sources are unbalanced. However, achieving this benefit requires careful PCB symmetry: trace lengths to IN+ and IN– must match within 0.5 mm, and return paths should mirror signal paths to minimize loop area. In multi-channel systems, adjacent channels must not share input traces unless decoupled with guard rings or ground planes. Misalignment here degrades CMRR below 60 dB at 50 kHz, undermining noise immunity in motor-driven or RF-proximate environments.
What is the minimum hold capacitor charging time required after the acquisition phase before initiating conversion in the AD7988-5BCPZ-RL7, and how does this constrain maximum source impedance?
Although not explicitly detailed in the datasheet, the AD7988-5BCPZ-RL7’s internal track-and-hold uses a switched-capacitor front end optimized for 1 µs settling time to achieve full 16-bit accuracy. Assuming a 10 pF input capacitance and target settling error < 0.5 LSB (≈15 µV), the RC time constant formed by the source impedance and sampling capacitor must settle within this window. Solving for maximum R yields approximately 1.5 kΩ when C_load = 500 pF. Therefore, source impedances above 1 kΩ significantly extend acquisition time unless compensated by an external buffer. Exceeding this without buffering results in missing codes during fast conversions, particularly problematic in multiplexed or battery-powered systems where driver overhead is constrained.
How does the 10-LFCSP-WD package of the AD7988-5BCPZ-RL7 affect thermal performance during continuous 500 kSPS operation, and what solder joint reliability concerns arise at elevated ambient temperatures?
Operating the AD7988-5BCPZ-RL7 continuously at 500 kSPS generates minimal self-heating—typically < 0.5 W—but the 3x3 mm 10-pin CSP package has limited exposed pad thermal conductivity without proper PCB copper attachment. Without adequate ground plane vias, junction-to-ambient thermal resistance can exceed 60°C/W, leading to temperature rise above 30°C in sealed enclosures. More critically, the small solder joint area between the exposed pad and inner layer increases risk of delamination under thermal cycling above 100°C ambient. Per JEDEC MSL 3 guidelines, storage beyond 168 hours requires baking prior to reflow. Engineers should allocate >25 mm² of solid copper beneath the pad with multiple thermal vias to adjacent layers, ensuring compliance with IPC Class 3 standards for mission-critical applications.
What is the effective number of bits (ENOB) degradation when driving the AD7988-5BCPZ-RL7 with a 50 Hz sinusoidal input at Nyquist frequency (250 kHz), considering harmonic distortion and aperture jitter?
At 250 kHz input frequency, the AD7988-5BCPZ-RL7 experiences significant aperture jitter effects due to its fixed sampling instant. Assuming a 5 Vpp input and ideal quantization, theoretical SNR is 98 dB for 16-bit resolution. However, internal comparator hysteresis and clock distribution skew introduce spurious tones reducing ENOB to approximately 14.5 bits under these conditions. Harmonic distortion remains below -90 dBc for fundamental frequencies below 100 kHz but rises sharply near Nyquist. For accurate amplitude measurements above 100 kHz, consider undersampling or using higher-order anti-aliasing filters tuned to preserve phase response. Direct digitization of 50 Hz signals yields optimal ENOB (~15.8 bits) with minimal dynamic error.
How does the AD7988-5BCPZ-RL7 compare to the AD7980 in terms of power consumption and interface complexity when replacing it in existing designs targeting portable medical monitoring equipment?
The AD7980 consumes roughly half the quiescent current (1.5 mA vs. 3.2 mA) and supports lower-speed SPI modes, making it more suitable for ultra-low-power battery-operated devices. However, the AD7988-5BCPZ-RL7 offers superior sampling rate (500 kSPS vs. 200 kSPS) and identical pinout compatibility, enabling drop-in replacement without redesigning timing logic. Interface complexity is similar—both use 4-wire SPI with DSP framing—but the AD7988 requires faster microcontroller clocks to sustain throughput. When prioritizing energy per sample, the AD7980 wins; when balancing speed, integration, and power in compact form factors like wearables, the AD7988’s higher bandwidth justifies its marginally increased power draw, provided efficient DC-DC regulation is implemented.

Parts with Similar Specifications

The three parts on the right have similar specifications to Analog Devices Inc. AD7988-5BCPZ-RL7

Product Attribute AD7988-5CCPZ-RL7 AD7988-1BCPZ-RL7 AD7988-5BCPZ-RL AD7988-5BRMZ-RL7
Part Number AD7988-5CCPZ-RL7 AD7988-1BCPZ-RL7 AD7988-5BCPZ-RL AD7988-5BRMZ-RL7
Manufacturer Analog Devices Inc. Analog Devices Inc. Analog Devices Inc. Analog Devices Inc.
Number of Inputs - - - 2
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Data Interface - LVDS - Parallel I²C LVDS - Parallel, Parallel
Architecture - Current Source R-2R Pipelined
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Number of A/D Converters - - - 2
Sampling Rate (Per Second) - - - 65M
Reference Type - External, Internal External External, Internal
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Mounting Type - Surface Mount Through Hole Surface Mount
Base Product Number - DAC34H84 MAX500 ADS62P42
Voltage - Supply, Digital - 1.14V ~ 1.26V 11.4V ~ 16.5V 1.65V ~ 3.6V
Voltage - Supply, Analog - 3.14V ~ 3.46V 11.4V ~ 16.5V 3V ~ 3.6V
Features - - - Simultaneous Sampling
Series - - - -
Configuration - - - S/H-ADC
Number of Bits - 16 8 14
Input Type - - - Differential
Ratio - S/H:ADC - - - 1:1

AD7988-5BCPZ-RL7 Datasheet PDF

Download AD7988-5BCPZ-RL7 pdf datasheets and Analog Devices Inc. documentation for AD7988-5BCPZ-RL7 - Analog Devices Inc..

Datasheets
Cylindrical Battery Holders.pdf
PCN Assembly/Origin
2.73KHz.pdf
Other Related Documents
Tape and Reel Packaging.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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AD7988-5BCPZ-RL7 Image

AD7988-5BCPZ-RL7

Analog Devices Inc.
32D-AD7988-5BCPZ-RL7

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