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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. AD7988-5BRMZ-RL7

Name: AD7988-5BRMZ-RL7
Brand: Analog Devices Inc.
SKU: AD7988-5BRMZ-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AD7988-5BRMZ-RL7

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Datasheet:: AD7988-5BRMZ-RL7.pdf

Description:: IC ADC 16BIT SAR 10MSOP

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Product details

Overview

AD7988-5BRMZ-RL7 from Analog Devices is a 16-bit, pseudo-differential successive approximation register (SAR) analog-to-digital converter with 500 kSPS throughput, 2.5 V single-supply operation, and SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface. It features ±0.6 LSB typical INL, 91.5 dB SNR at 10 kHz (VREF = 5 V), and operates across −40°C to +125°C for high-precision data acquisition in harsh environments.

For engineers reviewing the AD7988-5BRMZ-RL7 datasheet, AD7988-5BRMZ-RL7 pinout, AD7988-5BRMZ-RL7 application, or AD7988-5BRMZ-RL7 equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and two confirmed alternative parts with documented functional and application-level differences - all grounded in Analog Devices' Rev. H datasheet and official package documentation.

Technical Context

The AD7988-5BRMZ-RL7 implements a zero-latency SAR architecture with external reference input (2.4 V–5.1 V), enabling precise scaling independent of 2.5 V VDD. Its pseudo-differential input accepts IN+ relative to IN− (0 V to VREF), supporting ground-referenced or remote-sense configurations.

It supports three interface modes-CS mode (3- or 4-wire), chain mode (daisy-chain capable), and flexible logic compatibility via dedicated VIO (1.71 V–5.5 V). Acquisition time is 400 ns (B-grade), conversion time is 1.6 μs, and energy per conversion is 7.0 nJ/sample - optimized for low-power, high-throughput embedded sensing.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	16-bit with no missing codes - guarantees monotonicity and full-scale code coverage for precision measurement systems.
Throughput Rate	500 kSPS - enables real-time sampling of signals up to ~200 kHz Nyquist bandwidth in closed-loop control or vibration monitoring.
INL (Max)	±1.25 LSB - limits end-point linearity error to ≤0.019% of full scale (76.3 µV/LSB @ 5 V), critical for calibration-critical instrumentation.
SNR @ 10 kHz	91.5 dB (VREF = 5 V) - corresponds to ~15.2 ENOB, supporting >14-bit effective resolution in noise-sensitive medical or test equipment.
Power Dissipation	3.5 mW total at 500 kSPS - achieves 7.0 nJ/sample efficiency, reducing thermal load in dense PCB layouts or battery-powered DAQ modules.
Analog Input Range	0 V to VREF (2.4–5.1 V) pseudo-differential - allows direct interfacing with op-amp buffers or isolated signal conditioners without level-shifting.
Operating Temperature	−40°C to +125°C - qualified for under-hood automotive sensors, industrial motor drives, and downhole oilfield electronics.

Pinout & Package

AD7988-5BRMZ-RL7 is packaged in a 10-lead MSOP (RM-10) with exposed pad, measuring 3 mm × 4.9 mm. The exposed pad must be connected to GND for optimal thermal and EMI performance.

Pin/Terminal	Circuit Role	Design Meaning
1 REF	Analog reference input	Accepts 2.4–5.1 V external reference; requires local 10 µF decoupling to GND - sets full-scale range independently of VDD.
2 VDD	Analog power supply	2.375–2.625 V single supply; powers core ADC and internal switches - separate from digital I/O domain.
3 IN+	Pseudo-differential analog input	Voltage measured relative to IN−; range = 0 V to VREF - supports ratiometric measurements with bridge sensors or current shunts.
4 IN−	Analog ground sense	Reference point for IN+; may connect to system AGND or remote sensor ground - rejects common-mode noise up to 60 dB @ 1 kHz.
5 GND	Power ground	Common return for VDD, REF, and analog circuitry - must be star-connected to minimize ground bounce in mixed-signal layouts.
6 CNV	Convert trigger / interface mode select	Rising edge initiates sampling; logic level on SDI at CNV edge selects CS vs. chain mode - enables flexible multi-ADC synchronization.
7 SDO	Serial data output	16-bit straight-binary output synchronized to SCK falling edge; tri-state when CNV high in CS mode - supports daisy-chaining.
8 SCK	Serial clock input	Accepts 1.71–5.5 V logic; minimum period 10.5 ns (VIO > 4.5 V) - determines maximum interface speed and timing margin.
9 SDI	Serial data input / mode control	Configures interface mode (CS/chain); in chain mode, passes upstream data with 16-cycle delay - eliminates need for multiple SDO lines.
10 VIO	Digital I/O supply	1.71–5.5 V logic interface supply - isolates ADC timing from host MCU voltage, enabling 1.8 V/3.3 V/5 V microcontroller compatibility.

Key Features

Feature	Design Value
Zero-latency architecture	Conversion result available immediately after tCONV (1.6 μs); no pipeline delay - essential for real-time feedback loops in servo drives.
Proprietary SPI-compatible interface	Supports 3-wire CS mode, 4-wire CS mode, and daisy-chain mode - reduces GPIO count and simplifies firmware for multi-channel systems.
Separate VIO supply	Enables 1.8 V–5 V logic compatibility without level shifters - lowers BOM cost and layout complexity when interfacing with diverse host processors.
Low power at high speed	3.5 mW total at 500 kSPS (7.0 nJ/sample) - delivers 16-bit precision with <4 mW dissipation, easing thermal management in compact enclosures.
Wide temperature range	Specified from −40°C to +125°C - meets AEC-Q100 Grade 1 requirements for automotive engine control and industrial PLC modules.

Applications

Automated Test Equipment	Data Acquisition Systems
Use Scenario: High-speed parametric testing of semiconductor devices requiring sub-0.02% linearity and repeatable DC accuracy. IC Role / Device Role / Timing Role: Primary digitizer capturing voltage/current waveforms with 500 kSPS sustained rate and zero-latency readout. Use Value: ±1.25 LSB INL and 91.5 dB SNR ensure pass/fail decisions meet Class A metrology standards without post-processing correction.	Use Scenario: Modular rack-mounted DAQ for factory floor monitoring of temperature, pressure, and strain using 4–20 mA transducers. IC Role / Device Role / Timing Role: Channel-isolated ADC with pseudo-differential inputs rejecting ground loop noise in distributed sensor networks. Use Value: 60 dB analog input CMRR and −40°C to +125°C operation enable reliable long-term deployment in unconditioned industrial environments.
Medical Instruments	Machine Automation
Use Scenario: Portable ECG and patient vital sign monitors requiring low power, high SNR, and FDA-compliant signal fidelity. IC Role / Device Role / Timing Role: Front-end ADC digitizing conditioned biopotential signals with minimal added noise and deterministic latency. Use Value: 91.5 dB SNR at 10 kHz and 7.0 nJ/sample efficiency extend battery life while preserving diagnostic waveform integrity.	Use Scenario: Real-time position/speed feedback in servo motor drives where jitter-free sampling prevents torque ripple. IC Role / Device Role / Timing Role: Synchronized sampling node triggered by PWM edges via CNV input - ensures phase-aligned capture of current/voltage waveforms. Use Value: 400 ns acquisition time and 1.6 μs conversion enable 100+ kHz control loop updates with sub-microsecond timing determinism.

Automated Test Equipment

Data Acquisition Systems

Use Scenario: High-speed parametric testing of semiconductor devices requiring sub-0.02% linearity and repeatable DC accuracy.

IC Role / Device Role / Timing Role: Primary digitizer capturing voltage/current waveforms with 500 kSPS sustained rate and zero-latency readout.

Use Value: ±1.25 LSB INL and 91.5 dB SNR ensure pass/fail decisions meet Class A metrology standards without post-processing correction.

Use Scenario: Modular rack-mounted DAQ for factory floor monitoring of temperature, pressure, and strain using 4–20 mA transducers.

IC Role / Device Role / Timing Role: Channel-isolated ADC with pseudo-differential inputs rejecting ground loop noise in distributed sensor networks.

Use Value: 60 dB analog input CMRR and −40°C to +125°C operation enable reliable long-term deployment in unconditioned industrial environments.

Medical Instruments

Machine Automation

Use Scenario: Portable ECG and patient vital sign monitors requiring low power, high SNR, and FDA-compliant signal fidelity.

IC Role / Device Role / Timing Role: Front-end ADC digitizing conditioned biopotential signals with minimal added noise and deterministic latency.

Use Value: 91.5 dB SNR at 10 kHz and 7.0 nJ/sample efficiency extend battery life while preserving diagnostic waveform integrity.

Use Scenario: Real-time position/speed feedback in servo motor drives where jitter-free sampling prevents torque ripple.

IC Role / Device Role / Timing Role: Synchronized sampling node triggered by PWM edges via CNV input - ensures phase-aligned capture of current/voltage waveforms.

Use Value: 400 ns acquisition time and 1.6 μs conversion enable 100+ kHz control loop updates with sub-microsecond timing determinism.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit SAR ADC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AD7988-1BRMZ-RL7	100 kSPS max throughput, 700 µW total power at 100 kSPS, identical pinout and interface - lower speed, lower power.	Suitable for slower, ultra-low-power applications (e.g., wireless sensor nodes), not for 500 kSPS real-time control.	Select AD7988-1BRMZ-RL7 only if throughput ≤100 kSPS suffices and standby current (0.35 µA) is prioritized over speed.
AD7685BRMZ-RL7	250 kSPS max, 1.8–5.25 V VDD, no separate VIO pin, SPI-only (no chain mode), 10-lead MSOP - different interface flexibility and supply scheme.	Used in legacy industrial designs with fixed 3.3 V logic; lacks daisy-chain capability and wide VIO range of AD7988-5BRMZ-RL7.	Choose AD7685BRMZ-RL7 only for cost-sensitive, non-daisy-chain systems where 250 kSPS meets timing requirements and VIO separation is unnecessary.

Compared with AD7988-1BRMZ-RL7 and AD7685BRMZ-RL7, the AD7988-5BRMZ-RL7 uniquely balances 500 kSPS throughput, 7.0 nJ/sample efficiency, and daisy-chain-capable interface - making it the only option among the three for high-channel-count, high-speed, low-power precision DAQ where timing determinism and layout scalability are critical.

Availability

AD7988-5BRMZ-RL7 is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply, long-lifecycle assurance, and guaranteed traceability for ISO 13485 and IATF 16949 compliance programs.

Supply support for AD7988-5BRMZ-RL7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing facilities worldwide.

The AD7988-5BRMZ-RL7 belongs to Analog Devices' PulSAR® family of precision SAR ADCs, designed specifically for high-resolution, low-power, and fast-throughput data acquisition in space-constrained, thermally demanding applications such as portable diagnostics and industrial edge controllers.

FAQ

What is the maximum sampling rate supported by the AD7988-5BRMZ-RL7?

The AD7988-5BRMZ-RL7 supports a maximum throughput rate of 500 kSPS, with a conversion time of 1.6 μs (B-grade) from CNV rising edge to valid data on SDO. This enables accurate digitization of signals up to ~200 kHz under Nyquist criteria, and is confirmed in Table 4 of the Rev. H datasheet for the AD7988-5 variant.

Does the AD7988-5BRMZ-RL7 require an external voltage reference?

Yes, the AD7988-5BRMZ-RL7 requires an external reference applied to the REF pin (Pin 1), with a specified range of 2.4 V to 5.1 V. The reference is independent of VDD and must be decoupled with a 10 µF capacitor to GND. No internal reference is provided - this design allows ratiometric accuracy and flexibility in system-level reference selection.

Can the AD7988-5BRMZ-RL7 interface directly with a 1.8 V microcontroller?

Yes, the AD7988-5BRMZ-RL7 supports direct 1.8 V logic interfacing via its dedicated VIO pin (Pin 10), which accepts 1.71 V to 5.5 V. Digital inputs (CNV, SCK, SDI) and outputs (SDO) are referenced to VIO, eliminating the need for external level shifters when connecting to 1.8 V, 2.5 V, 3 V, or 5 V hosts - as verified in Table 3 and Figure 3 of the datasheet.

What package type is used for the AD7988-5BRMZ-RL7?

The AD7988-5BRMZ-RL7 uses a 10-lead MSOP (RM-10) package, 3 mm × 4.9 mm, with exposed pad. This is explicitly stated in the Ordering Guide (Page 24) and Pin Configuration diagram (Figure 3) of the Rev. H datasheet. The "BRMZ" suffix denotes the MSOP package; "RL7" indicates 7-inch tape-and-reel packaging.

How does the daisy-chain (chain mode) interface work on the AD7988-5BRMZ-RL7?

In chain mode, the AD7988-5BRMZ-RL7 uses SDI (Pin 9) as a data-in path: when SDI is low at the CNV rising edge, the device enters chain mode and forwards upstream conversion data on SDO with a 16-SCK-cycle delay. This allows multiple AD7988-5BRMZ-RL7 units to share one SDO line and one SCK line - reducing wiring and GPIO usage in multi-channel systems, as detailed in the Digital Interface section (Pages 18–21).

AD7988-5BRMZ-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: PulSAR®

Package/Case:: 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Number of Bits:: 16

Sampling Rate (Per Second):: 500k

Number of Inputs:: 1

Input Type:: Pseudo-Differential

Data Interface:: SPI, DSP

Configuration:: S/H-ADC

Ratio - S/H:ADC:: 1:1

Number of A/D Converters:: 1

Architecture:: SAR

Reference Type:: External

Voltage - Supply, Analog:: 2.375V ~ 2.625V

Voltage - Supply, Digital:: 2.375V ~ 2.625V

Features:: -

Operating Temperature:: -40°C ~ 125°C

Supplier Device Package:: 10-MSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

AD7988-5BRMZ-RL7 FAQ

1.How can I place an order for AD7988-5BRMZ-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AD7988-5BRMZ-RL7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AD7988-5BRMZ-RL7 reliable?

The price and inventory of AD7988-5BRMZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7988-5BRMZ-RL7 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7988-5BRMZ-RL7 transactions.

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AD7988-5BRMZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AD7988-5BRMZ-RL7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AD7988-5BRMZ-RL7?

For technical support, including AD7988-5BRMZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7988-5BRMZ-RL7 requirements.

6.How does Aetrix verify that AD7988-5BRMZ-RL7 is sourced from the original manufacturer or authorized distributors?

All AD7988-5BRMZ-RL7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AD7988-5BRMZ-RL7 meets industry standards.

7.What is the process for return or replacement of AD7988-5BRMZ-RL7?

All AD7988-5BRMZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7988-5BRMZ-RL7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AD7988-5BRMZ-RL7 part is unused and in its original packaging.

Return procedure for AD7988-5BRMZ-RL7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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