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Analog Devices Inc. AD7988-5BRMZ
- Part No.:
- AD7988-5BRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7988-5BRMZ.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,741
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Product details
Overview
AD7988-5BRMZ from Analog Devices is a 16-bit, pseudo-differential successive approximation register (SAR) analog-to-digital converter with 500 kSPS throughput, 91.5 dB SNR at 10 kHz input, ±1.25 LSB max INL, and single-supply 2.5 V operation. It features zero-latency architecture, SPI-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface, and operates across −40°C to +125°C for high-precision data acquisition in harsh environments.
For engineers reviewing the AD7988-5BRMZ datasheet, AD7988-5BRMZ pinout, AD7988-5BRMZ application, or AD7988-5BRMZ equivalent, key selection considerations include its 500 kSPS sampling rate, 2 mW VDD-only power dissipation at full speed, 10-lead MSOP/LFCSP package compatibility, and support for external reference voltages from 2.4 V to 5.1 V with 92 dB dynamic range at 5 V.
Technical Context
The AD7988-5BRMZ implements a true SAR conversion architecture with no pipeline delay-conversion results are available immediately after completion. Its CNV rising edge initiates sampling of the pseudo-differential input (IN+ relative to IN−), supporting 0 V to VREF analog range with externally applied reference.
Digital interface flexibility includes CS mode (3- or 4-wire SPI) and chain mode for daisy-chaining multiple ADCs on a single SDO line. Separate VIO supply (1.71 V to 5.5 V) enables interoperability with 1.8 V, 2.5 V, 3 V, or 5 V logic families without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonicity and full code coverage for precision measurement systems. |
| Throughput Rate | 500 kSPS maximum-supports real-time monitoring of fast transients in industrial control and medical instrumentation. |
| SNR @ 10 kHz | 91.5 dB at VREF = 5 V-enables >15-bit effective resolution for low-noise signal conditioning paths. |
| INL (max) | ±1.25 LSB at VREF = 5 V-limits end-point error to <95 µV, critical for calibrated sensor interfaces. |
| Power Dissipation (total) | 3.5 mW at 500 kSPS-achieves 7.0 nJ/conversion energy efficiency for battery-powered or thermally constrained designs. |
| Analog Input Range | 0 V to VREF (2.4 V–5.1 V)-allows flexible scaling with precision external references while maintaining 16-bit linearity. |
| Operating Temperature | −40°C to +125°C-qualified for under-hood automotive, downhole oil & gas, and industrial motor drive applications. |
Pinout & Package
AD7988-5BRMZ is available in a 10-lead MSOP (RM-10) package with exposed pad, measuring 3 mm × 3 mm × 1.1 mm. The exposed pad must be connected to GND for optimal thermal and electrical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: REF | Analog reference input | Accepts 2.4 V–5.1 V external reference; requires local 10 µF decoupling to GND for noise immunity. |
| 2: VDD | Analog power supply | 2.375 V–2.625 V single supply; powers core ADC and internal logic; separate from digital I/O rail. |
| 3: IN+ | Pseudo-differential analog input | Input voltage measured relative to IN−; supports 0 V to VREF range with 10 MHz −3 dB bandwidth. |
| 4: IN− | Analog ground sense | Reference point for IN+; connects to analog ground plane or remote sensor ground to reject common-mode noise. |
| 5: GND | Power ground | Common return for VDD, REF, and analog inputs; must be tied to exposed pad and system AGND. |
| 6: CNV | Convert control input | Rising edge triggers sampling; also selects interface mode (CS vs. chain) based on SDI state at edge. |
| 7: SDO | Serial data output | 16-bit straight-binary result synchronized to SCK; tri-state controlled by CNV (CS mode) or timing (chain mode). |
| 8: SCK | Serial clock input | Drives data shift-out; minimum period 10.5 ns (VIO > 4.5 V); supports up to ~95 MHz SCK frequency. |
| 9: SDI | Serial data input / mode select | Configures interface: low at CNV edge enables daisy-chain mode; high enables CS mode with SDI/CNV as chip-select. |
| 10: VIO | Digital I/O supply | 1.71 V–5.5 V logic interface rail; isolates digital noise from analog section; sets VIH/VIL thresholds. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Conversion result available immediately after tCONV (1.2–1.6 µs), eliminating pipeline delay for real-time closed-loop control. |
| Flexible serial interface | Native SPI/QSPI/MICROWIRE/DSP compatibility with 3-wire CS mode and 2-wire chain mode for scalable multi-ADC systems. |
| Low-power, high-efficiency operation | 3.5 mW total at 500 kSPS (7.0 nJ/sample) enables continuous high-speed sampling in power-sensitive portable instruments. |
| Wide temperature grade | Specified performance from −40°C to +125°C ensures reliability in extended industrial and automotive environments without derating. |
| High AC accuracy | 92 dB dynamic range and −114 dB THD at 10 kHz enable precise spectral analysis in vibration monitoring and power quality analyzers. |
Applications
| Automated Test Equipment | Data Acquisition Systems |
|---|---|
|
Use Scenario: High-channel-count PXI-based digitizers capturing transient waveforms during semiconductor parametric testing. IC Role / Device Role / Timing Role: Primary 16-bit sampling ADC acquiring synchronized multi-channel analog signals at 500 kSPS with deterministic latency. Use Value: Zero-latency operation ensures accurate timestamp alignment across channels; 91.5 dB SNR preserves small-signal fidelity in low-current leakage measurements. |
Use Scenario: Modular rack-mounted DAQ units for factory-floor process monitoring with isolated analog front-ends. IC Role / Device Role / Timing Role: Precision ADC interfacing to strain gauges and RTDs via low-noise instrumentation amplifiers. Use Value: ±1.25 LSB INL and 92 dB dynamic range maintain calibration integrity over full industrial temperature range (−40°C to +125°C). |
| Medical Instruments | Machine Automation |
|
Use Scenario: Portable ECG monitors requiring low-power, high-SNR acquisition of microvolt-level cardiac signals. IC Role / Device Role / Timing Role: Front-end ADC sampling conditioned biopotential signals with minimal added noise and distortion. Use Value: 3.5 mW total power at 500 kSPS extends battery life; −114 dB THD prevents harmonic contamination of diagnostic waveforms. |
Use Scenario: Servo drive feedback loops capturing motor phase currents and position encoder analog outputs. IC Role / Device Role / Timing Role: Real-time current sensing ADC providing fast, accurate feedback for field-oriented control algorithms. Use Value: 500 kSPS throughput meets IEC 61800-3 requirements for Class A EMC compliance; 10 MHz input bandwidth supports high-bandwidth current sensing. |
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 | 100 kSPS max throughput, 700 µW total power at 100 kSPS, identical pinout and interface. | Better suited for low-throughput, ultra-low-power applications (e.g., wireless sensor nodes) where 500 kSPS is unnecessary. | Select AD7988-1BRMZ when system sampling rate ≤100 kSPS and sub-mW power is prioritized over speed. |
| AD7685BRMZ | 16-bit, 250 kSPS, 1.5 mW at 250 kSPS, SPI-only interface (no chain mode), wider VDD range (2.3 V–5.5 V). | Lacks daisy-chain capability and has lower throughput; requires different timing and layout due to distinct pin mapping. | Choose AD7685BRMZ only if legacy design compatibility or broader supply voltage tolerance outweighs need for 500 kSPS and chain-mode scalability. |
Compared with AD7988-1BRMZ and AD7685BRMZ, AD7988-5BRMZ uniquely delivers 500 kSPS throughput with daisy-chain support and lowest energy-per-conversion (7.0 nJ) among pin-compatible 16-bit SAR ADCs in 10-lead MSOP.
Availability
AD7988-5BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical instrumentation, and machine automation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AD7988-5BRMZ 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.
The AD7988 family targets precision, low-power, high-speed data acquisition in space-constrained industrial and medical systems, emphasizing zero-latency operation, wide temperature range, and flexible digital interfacing.
FAQ
What is the maximum sampling rate of the AD7988-5BRMZ?
The AD7988-5BRMZ achieves a maximum throughput rate of 500 kSPS, with conversion time (CNV rising edge to data available) as low as 1.2 µs for C-grade devices. This rate is maintained across the full operating temperature range of −40°C to +125°C and supports real-time acquisition of fast-changing analog signals without pipeline delay.
Does the AD7988-5BRMZ require an external reference voltage?
Yes, the AD7988-5BRMZ requires an external reference voltage applied to the REF pin. It accepts 2.4 V to 5.1 V, and the analog input range is 0 V to VREF. The device does not include an internal reference; using a precision external reference (e.g., ADR4550) ensures optimal INL and SNR performance as specified in the datasheet.
Can the AD7988-5BRMZ interface directly with a 1.8 V microcontroller?
Yes, the AD7988-5BRMZ supports 1.8 V logic via its dedicated VIO supply pin (1.71 V to 5.5 V). When VIO = 1.8 V, VIH is 0.9 × VIO = 1.62 V and VIL is 0.1 × VIO = 0.18 V, ensuring reliable communication with 1.8 V MCUs without level shifters-provided timing margins (e.g., tSSDICNV ≥ 5 ns) are met.
What package options are available for the AD7988-5BRMZ?
The AD7988-5BRMZ is offered in two RoHS-compliant packages: 10-lead MSOP (RM-10, θJA = 200°C/W) and 10-lead 3 mm × 3 mm LFCSP (CP-10-9, θJA = 80°C/W). Both share identical pinout and functionality; the LFCSP provides superior thermal performance for high-density or thermally demanding PCB layouts.
How does the daisy-chain (chain) mode work on the AD7988-5BRMZ?
In chain mode, triggered by pulling SDI low at the CNV rising edge, the AD7988-5BRMZ forwards incoming SDI data to SDO after a 16-cycle delay. This allows multiple AD7988-5BRMZ devices to share one SDO line, reducing MCU GPIO count and simplifying routing in multi-channel systems-without requiring individual CS lines.
AD7988-5BRMZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- PulSAR®
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for AD7988-5BRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7988-5BRMZ 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 reliable?
The price and inventory of AD7988-5BRMZ 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 is usually 5 days.
3.What payment methods are accepted for AD7988-5BRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7988-5BRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7988-5BRMZ?
AD7988-5BRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7988-5BRMZ 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?
For technical support, including AD7988-5BRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7988-5BRMZ requirements.
6.How does Aetrix verify that AD7988-5BRMZ is sourced from the original manufacturer or authorized distributors?
All AD7988-5BRMZ 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 meets industry standards.
7.What is the process for return or replacement of AD7988-5BRMZ?
All AD7988-5BRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7988-5BRMZ, 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 part is unused and in its original packaging.
Return procedure for AD7988-5BRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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