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Analog Devices Inc. AD7989-1BRMZ
- Part No.:
- AD7989-1BRMZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
AD7989-1BRMZ.pdf
- Description:
- IC ADC 18BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:161
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Product details
Overview
AD7989-1BRMZ from Analog Devices is an 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 separate 1.71–5.5 V digital I/O voltage (VIO) and supports external reference voltages from 2.4 V to 5.1 V. It delivers 99 dB dynamic range and ±1 LSB typical INL in automated test equipment requiring high-resolution, low-power signal acquisition.
For engineers reviewing the AD7989-1BRMZ datasheet, AD7989-1BRMZ pinout, AD7989-1BRMZ application, or AD7989-1BRMZ equivalent, this page provides verified specifications, validated pin functions, confirmed package mapping (10-lead MSOP), real-world use scenarios in precision data acquisition, and two technically documented alternative parts for design flexibility.
Technical Context
The AD7989-1BRMZ implements a charge redistribution SAR architecture with on-chip track-and-hold, enabling true zero-latency conversion and no pipeline delay. Its differential input stage accepts ±VREF signals with 67 dB common-mode rejection at 450 kHz and supports full-scale ranges up to ±5 V when VREF = 5 V.
It features a proprietary SPI-/QSPI-/MICROWIRE-/DSP-compatible serial interface with dual-mode operation: chip-select (CS) mode using SDI/CS and CNV for multi-device control, or daisy-chain mode for compact 3-wire bus expansion. Conversion is triggered by the rising edge of CNV, and output data appears immediately after completion with no latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 18-bit with no missing codes - guarantees monotonicity and unambiguous code mapping across full scale. |
| Throughput | 100 kSPS - fixed maximum sampling rate; enables deterministic timing for real-time control loops. |
| INL | ±1 LSB typical, ±2 LSB max - ensures <0.00076% full-scale linearity error for calibration-sensitive instrumentation. |
| Dynamic Range | 99 dB at VREF = 5 V - supports >100 dB SNR-equivalent effective resolution in low-noise systems. |
| Power Dissipation | 700 µW total at 100 kSPS - allows battery-powered portable DAQ designs with minimal thermal load. |
| Analog Input Range | ±VREF, with VREF = 2.4–5.1 V - permits flexible scaling from ±2.4 V to ±5.1 V without external gain stages. |
| Supply Voltages | VDD = 2.375–2.625 V; VIO = 1.71–5.5 V - decouples analog core from logic domain for noise isolation. |
Pinout & Package
AD7989-1BRMZ is packaged in a 10-lead MSOP (RM-10) with exposed pad. The package measures 3 mm × 3 mm × 1.1 mm and supports −40°C to +85°C operation. 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 (2.4–5.1 V); must be decoupled with 10 µF capacitor to GND for stability. |
| 2 VDD | Power supply | 2.5 V analog core supply; powers internal SAR, comparator, and reference buffer. |
| 3 IN+ | Analog input | Differential positive input; accepts 0 V to VREF with common-mode centered at VREF/2. |
| 4 IN− | Analog input | Differential negative input; complements IN+ for true differential acquisition and CMRR enhancement. |
| 5 GND | Power ground | Analog and digital ground reference; requires low-impedance connection to minimize noise coupling. |
| 6 CNV | Digital input | Conversion start trigger; rising edge initiates sampling and selects interface mode (CS or chain). |
| 7 SDO | Digital output | 18-bit twos-complement serial data output; synchronized to SCK falling edge; high-impedance when disabled. |
| 8 SCK | Digital input | Serial clock input; supports variable frequency up to 50 MHz depending on VIO level. |
| 9 SDI/CS | Digital input | Configurable as serial data input (chain mode) or chip select (CS mode); determines bus topology. |
| 10 VIO | Power supply | Digital I/O interface supply (1.71–5.5 V); sets logic thresholds independently of VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-latency architecture | Eliminates pipeline delay - critical for closed-loop feedback systems where immediate result availability is required. |
| True differential input | ±VREF range with 67 dB CMRR at 450 kHz - rejects common-mode noise in motor current sensing and sensor front-ends. |
| Low power at 100 kSPS | 700 µW total dissipation - enables >1-year battery life in handheld multimeters or portable oscilloscopes. |
| Flexible digital interface | 1.71–5.5 V VIO compatibility with SPI/QSPI/MICROWIRE/DSP protocols - simplifies integration with FPGA, MCU, or DSP host. |
| Wide reference voltage range | 2.4–5.1 V external VREF - allows optimization of dynamic range and SNR for specific sensor output spans. |
Applications
| Automated Test Equipment | Data Acquisition Systems |
|---|---|
Use Scenario: High-accuracy voltage measurement in benchtop DMMs and PXI-based switching matrix controllers. IC Role / Device Role / Timing Role: Primary ADC capturing calibrated analog stimulus responses with 18-bit fidelity and deterministic 10 µs conversion cycle. Use Value: Enables sub-10 ppm absolute accuracy over temperature via ±1 LSB INL and 99 dB dynamic range. |
Use Scenario: Multi-channel synchronized sampling in industrial process monitoring racks with isolated analog inputs. IC Role / Device Role / Timing Role: Channel-specific SAR ADC in modular DAQ cards; zero-latency operation supports real-time waveform reconstruction. Use Value: Eliminates inter-channel skew and buffer memory requirements due to immediate data availability post-CNV. |
| Medical Instruments | Machine Automation |
Use Scenario: ECG/EEG front-end digitization in portable patient monitors requiring low power and high SNR. IC Role / Device Role / Timing Role: Low-noise, low-power ADC for biopotential signal conditioning; operates from 2.5 V supply with 1.8 V logic interface. Use Value: Delivers 97 dB SNR at 1 kHz while consuming only 700 µW - extends battery runtime without compromising diagnostic resolution. |
Use Scenario: Position feedback digitization in servo drives using resolver or LVDT sensors with differential outputs. IC Role / Device Role / Timing Role: Precision ADC interfacing directly to analog sensor outputs; supports ±5 V full-scale range with external 5 V reference. Use Value: Achieves <0.001° angular resolution in 16-bit-equivalent encoder applications via 18-bit noise-free code resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 18-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD7691BCPZ-RL7 | 18-bit, 250 kSPS, 2.5 V supply, integrated reference; no separate VIO pin - fixed 2.5 V logic interface. | Lower throughput but eliminates external reference design; unsuitable for mixed-voltage logic systems. | Select when system uses only 2.5 V digital interfaces and requires reduced BOM count via internal reference. |
| AD4003BRMZ | 18-bit, 1 MSPS, 1.8 V/3 V logic compatible, ±VREF input; higher speed but 4.5 mW power at full rate. | Supports faster control loops but requires thermal management; not drop-in due to different pinout and timing. | Select when >100 kSPS is needed and power budget allows ~6× higher dissipation; verify layout changes for LFCSP-10 footprint. |
Compared with AD7989-1BRMZ, AD7691BCPZ-RL7 trades throughput and interface flexibility for integration and simplicity, while AD4003BRMZ offers higher speed at significantly increased power and layout complexity - making AD7989-1BRMZ optimal for space-constrained, low-power, 100 kSPS precision DAQ nodes.
Availability
AD7989-1BRMZ is available at Aetrix Electronics and suitable for automated test equipment, medical instruments, and machine automation requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class II medical and industrial certifications.
Supply support for AD7989-1BRMZ 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 operations worldwide.
The AD7989 family targets precision, low-power, high-speed data acquisition in space- and energy-constrained applications - designed specifically for battery-operated test gear, portable diagnostics, and distributed industrial sensors where 18-bit resolution must coexist with sub-milliwatt operation.
FAQ
What is the maximum sampling rate of the AD7989-1BRMZ?
The AD7989-1BRMZ has a fixed maximum throughput of 100 kSPS, as confirmed in the Rev. C datasheet Table 2 and General Description section. This is distinct from the AD7989-5 variant (500 kSPS). The 100 kSPS rate is guaranteed over the full −40°C to +85°C temperature range with VDD = 2.5 V and VREF = 5 V. Conversion time is 9.5 µs, and minimum cycle time is 10 µs.
Does the AD7989-1BRMZ require an external reference voltage?
Yes, the AD7989-1BRMZ requires an external reference voltage applied to the REF pin. The datasheet specifies a 2.4 V to 5.1 V range, and performance metrics like dynamic range and SNR are characterized at VREF = 5 V. No internal reference is present; the device lacks a REFOUT pin or reference buffer - all reference conditioning must be handled externally.
What package type is used for the AD7989-1BRMZ?
The AD7989-1BRMZ uses a 10-lead MSOP (Mini Small Outline Package), designated RM-10 in Analog Devices' ordering guide and thermal tables. It is not the LFCSP variant (CP-10-9); the "BRMZ" suffix explicitly denotes the MSOP package with exposed pad. Pin configuration matches Figure 3 in the Rev. C datasheet, and θJA = 200°C/W is specified for this package under JEDEC 2S2P conditions.
Can the AD7989-1BRMZ interface with a 1.8 V microcontroller?
Yes, the AD7989-1BRMZ supports 1.8 V logic interfaces via its dedicated VIO pin (Pin 10), which accepts 1.71 V to 5.5 V. When VIO = 1.8 V, digital input thresholds are scaled accordingly (e.g., VIL ≤ +0.1 × VIO = 0.18 V), and SDO output VOH ≥ VIO − 0.3 V = 1.5 V - ensuring reliable communication with 1.8 V MCUs without level shifters.
What is the analog input voltage range specification for the AD7989-1BRMZ?
The AD7989-1BRMZ has a true differential analog input range of ±VREF, meaning the voltage difference between IN+ and IN− can swing from −VREF to +VREF. With VREF = 5 V, this yields a ±5 V range. Absolute input limits are −0.1 V to VREF + 0.1 V per pin, and common-mode range is tightly constrained to VREF × 0.475 to VREF × 0.525 - requiring matched driver circuitry for optimal CMRR.
AD7989-1BRMZ 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:
- 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 FAQ
1.How can I place an order for AD7989-1BRMZ through Aetrix?
Please submit a Request for Quotation (RFQ) for AD7989-1BRMZ 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 reliable?
The price and inventory of AD7989-1BRMZ 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 is usually 5 days.
3.What payment methods are accepted for AD7989-1BRMZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AD7989-1BRMZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AD7989-1BRMZ?
AD7989-1BRMZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AD7989-1BRMZ 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?
For technical support, including AD7989-1BRMZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AD7989-1BRMZ requirements.
6.How does Aetrix verify that AD7989-1BRMZ is sourced from the original manufacturer or authorized distributors?
All AD7989-1BRMZ 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 meets industry standards.
7.What is the process for return or replacement of AD7989-1BRMZ?
All AD7989-1BRMZ units undergo pre-shipment inspection (PSI). If there is an issue with AD7989-1BRMZ, 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 part is unused and in its original packaging.
Return procedure for AD7989-1BRMZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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