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Analog Devices Inc. AD7988-1BRMZ-RL7
- Part No.:
- AD7988-1BRMZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7988-1BRMZ-RL7.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AD7988-1BRMZ-RL7 from Analog Devices is a 16-bit pseudo-differential successive approximation register (SAR) analog-to-digital converter optimized for low-power, high-accuracy data acquisition. It delivers 100 kSPS throughput, ±0.6 LSB typical INL, 91.5 dB SNR at 10 kHz with 5 V reference, and operates from a single 2.5 V supply with 1.8 V–5 V logic interface-ideal for battery-powered medical sensors and industrial PLC analog input modules.
For engineers reviewing the AD7988-1BRMZ-RL7 datasheet, AD7988-1BRMZ-RL7 pinout, AD7988-1BRMZ-RL7 application, or AD7988-1BRMZ-RL7 equivalent, this page provides verified specifications, validated pin functions, real-world use cases in precision measurement systems, and confirmed alternative options for design flexibility and supply continuity.
Technical Context
The AD7988-1BRMZ-RL7 implements a zero-latency SAR architecture with internal sampling switch control synchronized to the CNV rising edge, enabling immediate conversion result availability without pipeline delay. Its pseudo-differential input structure accepts 0 V to VREF signals referenced to IN−, supporting external reference voltages from 2.4 V to 5.1 V independent of the 2.5 V VDD supply.
The SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface supports both CS mode (3- or 4-wire) and daisy-chain mode via SDI/SDO, with VIO pin enabling logic-level compatibility across 1.8 V, 2.5 V, 3 V, and 5 V host systems. Acquisition time is 500 ns, and aperture delay is 2.0 ns, ensuring precise timing control in high-fidelity sampling applications.
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. |
| Throughput Rate | 100 kSPS-supports real-time monitoring of slow-to-moderate dynamics such as temperature, pressure, or strain in embedded systems. |
| INL (max) | ±1.25 LSB at VREF = 5 V-limits absolute error to ±95.4 µV, critical for calibrated instrumentation-grade signal chains. |
| SNR | 91.5 dB at fIN = 10 kHz, VREF = 5 V-enables >15-bit effective resolution in noise-sensitive applications like medical ECG front-ends. |
| Power Dissipation | 700 µW total at 100 kSPS-achieves ultra-low energy per conversion (7.0 nJ/sample), extending battery life in portable devices. |
| Analog Input Range | 0 V to VREF (2.4 V–5.1 V) pseudo-differential-simplifies sensor interfacing by eliminating need for level-shifting amplifiers. |
| Operating Temperature | −40°C to +125°C-qualified for under-hood automotive, industrial motor control, and downhole sensing environments. |
Pinout & Package
AD7988-1BRMZ-RL7 is housed in a 10-lead MSOP package (RM-10) with exposed pad connected to GND for thermal and noise performance. Pinout matches the standard AD7988-1 footprint and is compatible with LFCSP variants at board level.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 REF | Analog reference input | Accepts external 2.4 V–5.1 V reference; requires local 10 µF decoupling to GND for stable conversion accuracy. |
| 2 VDD | Analog power supply | 2.375 V–2.625 V single supply; powers core ADC and internal switches-must be low-noise and well-filtered. |
| 3 IN+ | Pseudo-differential analog input | Input voltage measured relative to IN−; range = 0 V to VREF-used for unipolar sensor outputs or amplifier outputs. |
| 4 IN− | Analog ground sense | Reference node for IN+; connects to system analog ground or remote sensor ground to reject common-mode noise. |
| 5 GND | Power ground | Common return for VDD, REF, and digital supplies; must be tied to exposed pad for optimal thermal and EMI performance. |
| 6 CNV | Convert trigger / interface mode select | Rising edge initiates sampling; logic level on SDI at CNV edge selects CS mode (SDI high) or daisy-chain mode (SDI low). |
| 7 SDO | Serial data output | 16-bit straight-binary result, MSB-first, synchronized to SCK falling edge-drives host MCU SPI MISO line directly. |
| 8 SCK | Serial clock input | Host-provided clock up to 50 MHz (VIO ≥ 4.5 V); timing defines data valid window and conversion completion. |
| 9 SDI | Serial data input / mode control | Configures interface mode at CNV edge; in daisy-chain mode, passes upstream ADC data to next device's SDO. |
| 10 VIO | Digital I/O power supply | 1.71 V–5.5 V logic interface supply-decouples ADC digital timing from analog supply, enabling mixed-voltage system integration. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Conversion result available immediately after tCONV (9.5 µs), eliminating pipeline delay-critical for closed-loop control timing. |
| Low power at 100 kSPS | Total dissipation of 700 µW enables continuous operation in energy-constrained IoT nodes and handheld test equipment. |
| VIO logic supply independence | Separate 1.71 V–5.5 V VIO rail allows direct interfacing with 1.8 V microcontrollers without level shifters or voltage translators. |
| Daisy-chain capability | SDI/SDO chaining supports multi-channel acquisition with single SPI bus-reduces MCU pin count and PCB routing complexity. |
| Wide reference voltage range | 2.4 V–5.1 V REF support enables optimization of dynamic range and SNR for specific sensor full-scale outputs. |
Applications
| Medical Instrumentation | Industrial Data Acquisition |
|---|---|
|
Use Scenario: High-precision analog front-end for portable ECG monitors measuring microvolt-level cardiac signals. IC Role / Device Role / Timing Role: 16-bit SAR ADC digitizing conditioned biopotential signals with minimal added noise and deterministic sampling timing. Use Value: 91.5 dB SNR and ±1.25 LSB INL ensure accurate R-wave amplitude detection and ST-segment analysis without calibration drift. |
Use Scenario: Analog input module in programmable logic controllers capturing temperature, pressure, and current loop signals. IC Role / Device Role / Timing Role: Low-power, wide-temperature ADC performing synchronized multi-channel sampling in harsh factory environments. Use Value: −40°C to +125°C operation and 500 ns acquisition time enable reliable field deployment without derating or cooling. |
| Automated Test Equipment | Machine Automation Sensors |
|
Use Scenario: Digitizing reference waveforms and DUT outputs in benchtop multimeters and source-measure units. IC Role / Device Role / Timing Role: Precision ADC providing traceable, low-noise measurements with repeatable gain/offset behavior over temperature. Use Value: ±0.35 ppm/°C gain drift and ±0.54 ppm/°C zero drift minimize recalibration frequency in metrology-grade instruments. |
Use Scenario: Position feedback interface for servo drives using resolvers or LVDTs with analog output conditioning. IC Role / Device Role / Timing Role: Pseudo-differential input ADC rejecting common-mode noise from motor switching transients. Use Value: 60 dB analog input CMRR at 1 kHz suppresses PWM-coupled interference, improving position resolution stability. |
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 |
|---|---|---|---|
| AD7988-5BRMZ-RL7 | 500 kSPS throughput, 3.5 mW total power at full rate-higher speed but 5× higher power vs. AD7988-1BRMZ-RL7. | Suitable where oversampling or faster channel scanning is required; not drop-in due to different timing and power budget. | Select AD7988-5BRMZ-RL7 only when >100 kSPS is mandatory; verify thermal design and VDD regulation capability. |
| AD7687BRMZ-RL7 | 16-bit, 250 kSPS, 2.5 V supply, SPI interface-but uses internal reference and lacks VIO pin; INL ±1.5 LSB max. | Better suited for cost-sensitive, single-supply systems without external reference flexibility; lower AC performance (89 dB SNR). | Choose AD7687BRMZ-RL7 for simplified BOM with integrated reference; avoid if external VREF control or 1.8 V logic is needed. |
Compared with AD7988-5BRMZ-RL7 and AD7687BRMZ-RL7, AD7988-1BRMZ-RL7 uniquely balances ultra-low power (700 µW), external reference flexibility (2.4 V–5.1 V), and 1.8 V–5 V logic compatibility-making it optimal for portable, multi-voltage, and thermally constrained precision acquisition designs.
Availability
AD7988-1BRMZ-RL7 is available at Aetrix Electronics and suitable for medical instrumentation, industrial data acquisition, and automated test equipment requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for AD7988-1BRMZ-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 decades of expertise in precision data conversion and signal conditioning.
The AD7988 family was designed specifically for low-power, high-accuracy SAR ADC applications in space-constrained, thermally demanding environments-emphasizing zero-latency operation, flexible reference architecture, and robust industrial temperature performance.
FAQ
What is the maximum recommended reference voltage for AD7988-1BRMZ-RL7?
The AD7988-1BRMZ-RL7 supports an external reference voltage from 2.4 V to 5.1 V. The maximum recommended value is 5.1 V per Absolute Maximum Ratings; however, for optimal AC performance (e.g., 91.5 dB SNR), Analog Devices specifies testing at VREF = 5.0 V. Operating above 5.0 V may reduce dynamic range margin and increase THD without documented benefit.
Does AD7988-1BRMZ-RL7 support daisy-chaining with other ADCs?
Yes, AD7988-1BRMZ-RL7 supports daisy-chaining via its SDI and SDO pins. When SDI is held low during the CNV rising edge, the device enters chain mode: upstream conversion results pass through SDI and appear on SDO after a 16-SCK-cycle delay. This enables multi-ADC synchronization on a single 3-wire SPI bus without additional chip-select lines.
What is the minimum acquisition time required for full accuracy in AD7988-1BRMZ-RL7?
The AD7988-1BRMZ-RL7 requires a minimum acquisition time of 500 ns to achieve full 16-bit accuracy. This is specified in Table 4 under "Acquisition Time (tACQ)" and assumes proper analog driver settling and low-impedance source (<1 kΩ). Shorter times risk increased DNL and INL errors due to incomplete capacitor array charging.
Can AD7988-1BRMZ-RL7 operate with a 1.8 V digital interface while using 2.5 V analog supply?
Yes, AD7988-1BRMZ-RL7 fully supports mixed-voltage operation: VDD = 2.5 V powers the analog core, while VIO = 1.8 V sets the logic threshold for CNV, SCK, SDI, and SDO. Digital timing parameters (e.g., tSCK min = 22 ns) are validated down to VIO = 1.71 V, enabling direct connection to 1.8 V FPGAs or microcontrollers without level translation.
Is the exposed pad on AD7988-1BRMZ-RL7 required to be connected to ground?
Yes, the exposed pad on AD7988-1BRMZ-RL7 (MSOP package) must be soldered and electrically connected to GND. Per Figure 3 Notes and Table 6, this connection is essential for thermal dissipation (θJA = 200°C/W) and noise reduction. Leaving it floating degrades SNR by up to 3 dB and risks exceeding junction temperature limits under sustained 100 kSPS operation.
AD7988-1BRMZ-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):
- 100k
- 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:
- -
AD7988-1BRMZ-RL7 FAQ
1.How can I place an order for AD7988-1BRMZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7988-1BRMZ-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 AD7988-1BRMZ-RL7 reliable?
The price and inventory of AD7988-1BRMZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7988-1BRMZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7988-1BRMZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7988-1BRMZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7988-1BRMZ-RL7?
AD7988-1BRMZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7988-1BRMZ-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 AD7988-1BRMZ-RL7?
For technical support, including AD7988-1BRMZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7988-1BRMZ-RL7 requirements.
6.How does Aetrix verify that AD7988-1BRMZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7988-1BRMZ-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 AD7988-1BRMZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7988-1BRMZ-RL7?
All AD7988-1BRMZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7988-1BRMZ-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 AD7988-1BRMZ-RL7 part is unused and in its original packaging.
Return procedure for AD7988-1BRMZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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