My Inquiry
My Account
Analog Devices Inc. AD7989-1BRMZ-RL7
- Part No.:
- AD7989-1BRMZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7989-1BRMZ-RL7.pdf
- Description:
- IC ADC 18BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,104
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AD7989-1BRMZ-RL7 from Analog Devices is a 18-bit, 100 kSPS successive approximation register (SAR) analog-to-digital converter with true differential input, ±VREF range, zero-latency architecture, and SPI-compatible serial interface. It operates from a single 2.5 V supply with 1.8 V–5 V logic compatibility and delivers ±1 LSB typical INL, 99 dB dynamic range, and 98 dB SNR at 1 kHz for precision data acquisition in medical instruments and automated test equipment.
For engineers reviewing the AD7989-1BRMZ-RL7 datasheet, AD7989-1BRMZ-RL7 pinout, AD7989-1BRMZ-RL7 application, or AD7989-1BRMZ-RL7 equivalent, this page provides verified technical context, validated pin functions, confirmed power/performance trade-offs at 100 kSPS, and real-world interface constraints for daisy-chained SPI systems requiring low-power, high-resolution sampling.
Technical Context
The AD7989-1BRMZ-RL7 implements a charge redistribution SAR architecture with on-chip track-and-hold, enabling zero-latency conversion and no pipeline delay. Its differential input stage accepts ±VREF (2.4 V–5.1 V) with 67 dB CMRR at 450 kHz and supports external reference decoupling via 10 µF capacitor on REF pin.
It features dual-supply operation: 2.5 V VDD for core analog/digital circuitry and independent 1.71 V–5.5 V VIO for logic interfacing. The CNV rising edge initiates sampling and selects interface mode (CS or chain), while SDI/CS serves as both chip select and daisy-chain data input depending on CNV timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes - guarantees monotonicity and full code coverage across full temperature range. |
| Throughput Rate | 100 kSPS - fixed maximum sampling rate; determines minimum conversion cycle time of 10 µs. |
| Analog Input Range | True differential ±VREF - supports bipolar signal acquisition up to ±5.1 V with externally set reference. |
| INL Error | ±1 LSB typical, ±2 LSB max - ensures <0.004% gain linearity error over full scale for calibration-sensitive systems. |
| Dynamic Range | 99 dB at VREF = 5 V - enables detection of signals 10⁴.⁹⁵ below full scale, critical for low-amplitude sensor measurements. |
| Power Dissipation | 700 µW total at 100 kSPS - splits across VDD (400 µW), VIO (130 µW), and REF (170 µW) rails for isolated supply design. |
| Interface Compatibility | SPI-/QSPI™-/MICROWIRE™-/DSP-compatible - supports 3-wire CS mode and 4-wire daisy-chain mode with 1.8 V–5 V logic levels. |
Pinout & Package
AD7989-1BRMZ-RL7 is packaged in a 10-lead MSOP (RM-10) with exposed pad. Thermal resistance θJA = 200°C/W under JEDEC 2S2P board conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: REF | Analog Input | External reference voltage input (2.4 V–5.1 V); must be decoupled to GND with 10 µF capacitor for noise immunity. |
| 2: VDD | Power Supply | 2.375 V–2.625 V analog/digital core supply; powers ADC core, internal logic, and reference buffer. |
| 3: IN+ | Analog Input | Differential positive input; accepts voltage between −0.1 V and VREF + 0.1 V with 475–525% VREF common-mode range. |
| 4: IN− | Analog Input | Differential negative input; complements IN+ for true differential acquisition and common-mode rejection. |
| 5: GND | Power Ground | Analog and digital ground reference; connects to PCB ground plane and REF decoupling capacitor. |
| 6: CNV | Digital Input | Conversion start trigger; rising edge initiates sampling and selects interface mode (CS vs. chain) based on SDI/CS state. |
| 7: SDO | Digital Output | Serial data output; outputs 18-bit two's complement result synchronized to SCK falling edge in CS mode. |
| 8: SCK | Digital Input | Serial clock input; controls data shift-out timing; minimum period varies with VIO (10.5 ns @ VIO > 4.5 V). |
| 9: SDI/CS | Digital Input | Configurable function pin: high during CNV rise enables CS mode; low enables daisy-chain mode for multi-ADC systems. |
| 10: VIO | Power Supply | 1.71 V–5.5 V I/O interface supply; sets logic thresholds for all digital pins and isolates host MCU voltage domain. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Immediate data availability after conversion completion - eliminates pipeline delay for real-time control loop feedback. |
| True differential input | ±VREF range with 67 dB CMRR at 450 kHz - rejects common-mode noise in motor drive current sensing or ECG front-ends. |
| Low power scaling | 70 µW at 10 kSPS, 700 µW at 100 kSPS - linear power-throughput relationship enables dynamic power optimization in battery-powered DAQ. |
| Flexible digital interface | Supports 3-wire CS mode and 4-wire daisy-chain mode - reduces MCU GPIO count and simplifies multi-channel synchronization. |
| Wide logic voltage support | 1.8 V–5 V VIO compatibility - interfaces directly with legacy 5 V microcontrollers or modern 1.8 V FPGAs without level shifters. |
Applications
| Medical Instrumentation | Automated Test Equipment |
|---|---|
Use Scenario: High-fidelity acquisition of low-amplitude bio-signals (e.g., EEG, ECG) with minimal added noise and distortion. IC Role / Device Role / Timing Role: Primary 18-bit SAR ADC capturing differential electrode signals with 98 dB SNR and −119 dB THD at 1 kHz. Use Value: Enables sub-microvolt resolution and accurate spectral analysis without post-acquisition noise filtering. |
Use Scenario: Multi-channel voltage/current measurement in benchtop ATE systems requiring synchronized sampling and low latency. IC Role / Device Role / Timing Role: Precision digitizer in modular ATE backplane with daisy-chained SPI interface for channel density scaling. Use Value: Eliminates need for external FIFO or buffering due to zero-latency output and deterministic 10 µs conversion cycle. |
| Data Acquisition Systems | Machine Automation |
Use Scenario: Industrial environmental monitoring using thermocouples, RTDs, or strain gauges with ratiometric or external reference configurations. IC Role / Device Role / Timing Role: High-resolution front-end ADC with ±VREF input supporting programmable gain amplifier (PGA) output swing alignment. Use Value: Delivers 99 dB dynamic range to resolve small signal variations against large DC offsets in sensor conditioning circuits. |
Use Scenario: Closed-loop position/speed feedback in servo drives where encoder interpolation requires precise analog resolver or sin/cos signal digitization. IC Role / Device Role / Timing Role: Resolver-to-digital converter front-end with differential input rejecting PWM-induced common-mode noise from power stages. Use Value: 67 dB CMRR at 450 kHz suppresses switching noise, ensuring accurate rotor angle estimation under high dv/dt conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7691BRMZ | 18-bit, 250 kSPS, 2.5 V supply, SPI interface; higher throughput but 1.2 mW power at 250 kSPS vs. 700 µW at 100 kSPS. | Used in higher-speed DAQ where latency budget allows 4 µs conversion time; lacks daisy-chain mode support. | Select when system requires >100 kSPS and can accommodate higher power; not drop-in due to different timing and pinout. |
| AD4020BRMZ | 20-bit, 1 MSPS, 1.8 V/3.3 V dual supply, SPI interface; superior resolution and speed but 12 mW power at 1 MSPS. | Targeted at metrology-grade instrumentation requiring >16 ENOB; includes enhanced anti-aliasing filter and digital gain compensation. | Choose for applications demanding 20-bit fidelity and >500 kSPS; requires redesign for VIO/VDD separation and layout for higher-speed digital routing. |
Compared with AD7989-1BRMZ-RL7, AD7691BRMZ offers higher throughput at increased power and no daisy-chain capability, while AD4020BRMZ delivers 2-bit higher resolution and 10× speed at significantly higher power and cost-making AD7989-1BRMZ-RL7 optimal for battery-constrained, multi-channel, 100 kSPS precision systems.
Availability
AD7989-1BRMZ-RL7 is available at Aetrix Electronics and suitable for medical instrumentation, automated test equipment, and industrial data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for FDA-regulated or ISO 9001-certified production.
Supply support for AD7989-1BRMZ-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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, with R&D and manufacturing operations worldwide.
The AD7989 family is designed for precision, low-power, high-resolution data acquisition in space- and energy-constrained systems, emphasizing zero-latency operation, flexible digital interfacing, and robust performance across industrial temperature ranges.
FAQ
What is the maximum sampling rate of the AD7989-1BRMZ-RL7?
The AD7989-1BRMZ-RL7 has a fixed maximum throughput of 100 kSPS, corresponding to a minimum conversion cycle time of 10 µs. This is a device variant-specific limit - the pin-compatible AD7989-5 achieves 500 kSPS, but AD7989-1BRMZ-RL7 is factory-configured for 100 kSPS operation only.
Does the AD7989-1BRMZ-RL7 require an external reference voltage?
Yes, the AD7989-1BRMZ-RL7 requires an external reference voltage applied to the REF pin, which must be between 2.4 V and 5.1 V. The device does not include an internal reference; accuracy and dynamic performance (e.g., 99 dB dynamic range) are directly dependent on REF stability and noise.
Can the AD7989-1BRMZ-RL7 interface with a 1.8 V microcontroller?
Yes, the AD7989-1BRMZ-RL7 supports 1.8 V logic through its dedicated VIO supply pin (1.71 V–5.5 V). When VIO = 1.8 V, digital inputs accept VIH ≥ 0.9 × VIO and VIL ≤ 0.1 × VIO, and outputs drive VOH ≥ VIO − 0.3 V and VOL ≤ 0.4 V - enabling direct connection to 1.8 V MCUs without level translation.
What package type is used for the AD7989-1BRMZ-RL7?
The AD7989-1BRMZ-RL7 uses a 10-lead MSOP (RM-10) package with exposed pad. Its outline dimensions are 3.0 mm × 3.0 mm × 1.1 mm, and thermal resistance is θJA = 200°C/W under JEDEC 2S2P board conditions - suitable for compact, thermally constrained PCB layouts.
How does the daisy-chain interface mode work on the AD7989-1BRMZ-RL7?
In daisy-chain (chain) mode, enabled when SDI/CS is low during the CNV rising edge, the AD7989-1BRMZ-RL7 accepts serial data on SDI/CS and shifts out its 18-bit result on SDO with a 16-SCK-cycle delay. Multiple AD7989-1BRMZ-RL7 devices can share one SDO line and one SCK line, reducing MCU pin count in multi-channel systems.
AD7989-1BRMZ-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:
- 18
- Sampling Rate (Per Second):
- 100k
- Number of Inputs:
- 1
- Input Type:
- 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 ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
AD7989-1BRMZ-RL7 FAQ
1.How can I place an order for AD7989-1BRMZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7989-1BRMZ-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 AD7989-1BRMZ-RL7 reliable?
The price and inventory of AD7989-1BRMZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AD7989-1BRMZ-RL7 is usually 5 days.
3.What payment methods are accepted for AD7989-1BRMZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7989-1BRMZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7989-1BRMZ-RL7?
AD7989-1BRMZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7989-1BRMZ-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 AD7989-1BRMZ-RL7?
For technical support, including AD7989-1BRMZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7989-1BRMZ-RL7 requirements.
6.How does Aetrix verify that AD7989-1BRMZ-RL7 is sourced from the original manufacturer or authorized distributors?
All AD7989-1BRMZ-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 AD7989-1BRMZ-RL7 meets industry standards.
7.What is the process for return or replacement of AD7989-1BRMZ-RL7?
All AD7989-1BRMZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with AD7989-1BRMZ-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 AD7989-1BRMZ-RL7 part is unused and in its original packaging.
Return procedure for AD7989-1BRMZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AD7989-1BRMZ-RL7 Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
