AD7992BRMZ-1-R2 - 12-Bit 2-Ch SAR ADC, I2C, 10-MSOP | Analog Devices
MPN: AD7992BRMZ-1-R2 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.15 | $415.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.35 | $3,350.00 |
AD7992BRMZ-1-R2 Overview
An ADC (analog-to-digital converter) is a data-acquisition IC that samples continuous analog signals and translates them into discrete digital codes for downstream processors, microcontrollers, or FPGAs. SAR ADCs use a successive-approximation register and an internal DAC to perform one bit per clock cycle, achieving deterministic latency that is ideal for multiplexed multi-channel systems. The AD7992 belongs to the broader data-converter hierarchy: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor, sitting between the analog sensor front end and the digital host.
Key features include a 2-channel input multiplexer with track-and-hold, an external reference input from 1.2 V to VDD for maximum dynamic range, automatic or command-driven conversion modes controlled via the CONVST pin or the I2C bus, and a wide operating temperature range of -40C to +125C. The device consumes only a few milliwatts in operation and provides excellent DC accuracy for its class.
Typical applications include system monitoring and battery-cell monitoring in portable equipment, transducer/sensor signal acquisition, process-control loop read-back, and digital-system analog housekeeping (supply rails, temperature, current). The small 10-MSOP footprint, low power, and I2C connectivity make it a strong fit for space-constrained, multi-rail designs.
When designing with the AD7992BRMZ-1-R2, choose the external reference carefully - the input range scales with VREF, so a 5 V reference allows true 0-5 V single-ended or pseudo-differential sensing without external dividers. Decouple VDD with a 0.1 uF ceramic placed within 5 mm of the pin and keep analog/digital grounds joined at a single star point. Pull-up resistors on SDA/SCL must be sized for the chosen I2C speed (4.7 kohm at 400 kHz, 1 kohm at 3.4 MHz).
This page consolidates distributor pricing from DigiKey, Mouser, and Octopart, drop-in alternatives that share the 10-MSOP footprint, and practical design notes not included in the manufacturer datasheet.
Drop-in alternatives for AD7992BRMZ-1-R2 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7992BRMZ-1-R2 (same form factor and footprint) — differing in Number of Input Channels, Operating Temperature Range, Package, Resolution, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7992BRMZ-0
✅ Drop-In📋 Reference alternative (not in catalog)
AD7991BRMZ
✅ Drop-In📋 Reference alternative (not in catalog)
AD7992BRMZ-1
✅ Drop-In📋 Reference alternative (not in catalog)
AD7992BRMZ-1REEL7
✅ Drop-In📋 Reference alternative (not in catalog)
AD7992BRMZ-1REEL
✅ Drop-In📋 Reference alternative (not in catalog)
AD7992BRMZ-1-R2 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Input Channels | 2 (1 active at a time) |
| ADC Architecture | SAR (Successive Approximation) |
| Conversion Time | 2 us per channel (typical) |
| Input Type | Single-ended, multiplexed |
| Interface | I2C (Standard / Fast / High-Speed up to 3.4 MHz) |
| Number of I2C Addresses | Up to 2 (version dependent) |
| Supply Voltage (VDD) | 2.7 V to 5.5 V |
| External Reference Range | 1.2 V to VDD |
| Operating Temperature Range | -40C to +125C |
| Package | 10-pin MSOP (RM-10) |
| Mounting Type | Surface Mount |
| Conversion Control | CONVST pin, command mode, or automatic interval mode |
| Reel Quantity (R2 suffix) | 250 pieces |
| RoHS Status | Compliant |
AD7992BRMZ-1-R2 Pin Configuration
| Pin 1 | VDD — Power supply input (2.7 V to 5.5 V) |
| Pin 2 | GND — Ground reference |
| Pin 3 | REF — External reference voltage input (1.2 V to VDD) |
| Pin 4 | AIN1 — Analog input channel 1 |
| Pin 5 | AIN2 — Analog input channel 2 |
| Pin 6 | CONVST — Conversion start input (active low) |
| Pin 7 | SCL — I2C serial clock input |
| Pin 8 | SDA — I2C serial data I/O |
| Pin 9 | AD0 — I2C address select bit 0 |
| Pin 10 | NC — Not connected (per datasheet) |
Typical Applications
AD7992BRMZ-1-R2 is suitable for 6 applications: Portable System Monitoring, Industrial Process Control Loop Read-Back, Battery Cell Voltage Monitoring, Sensor Signal Acquisition (RTD / Thermocouple), Digital System Housekeeping, Test & Measurement Front-End.
Portable System Monitoring
The AD7992BRMZ-1-R2 suits portable system monitoring because its 2.7-5.5 V supply range aligns with single-cell Li-ion and USB rails, while its 12-bit SAR core provides deterministic 2 us conversion latency. The -1 variant's 3.4 MHz I2C mode keeps bus time short on densely-multiplexed designs. Two analog inputs let a single IC monitor battery voltage on one channel and die temperature (via a diode-connected transistor) on the other, cutting the BOM versus a discrete comparator plus ADC pair. The 10-MSOP package fits wearables and handheld instruments.
Recommended
Industrial Process Control Loop Read-Back
The AD7992BRMZ-1-R2's -40C to +125C operating range and 12-bit resolution make it suitable for industrial control loops reading 0-5 V or 0-10 V transducers. An external 5 V reference gives 1.22 mV LSB, fine enough for pressure or flow transmitters without PGA front-end amplification. The I2C interface allows up to 2 addresses per package, enabling multiple AD7992s on a single bus for panel-meter density. Watchdog-free deterministic latency simplifies PLC software design.
Recommended
Battery Cell Voltage Monitoring
Use the AD7992BRMZ-1-R2 to monitor two series cells or a cell plus pack-current sense resistor. Its external reference scales to whatever VREF bias the cell stack uses, and the SAR architecture produces a clean snapshot without input-charge sharing glitches between channels. The low 2.7 V minimum supply lets it run from the lowest cell in the stack or from a dedicated auxiliary rail. Internal multiplexing reduces wiring versus two single-channel ADCs.
Recommended
Sensor Signal Acquisition (RTD / Thermocouple)
Bridge, RTD, or thermocouple outputs require high-resolution ADC read-back; the AD7992BRMZ-1-R2's 12 bits and small input-referred noise enable ratiometric measurement against an external reference for accurate cold-junction compensation. Two channels let one ADC read the sensor and a second channel read the reference-junction temperature sensor. SAR architecture provides no-pipeline-delay conversions, ideal for safety loops. Add an op-amp front-end for gain.
Recommended
Digital System Housekeeping
Board-level housekeeping - reading supply voltages, hot-spot temperature, and chassis fan tach - is a classic use case for the AD7992BRMZ-1-R2. The I2C bus shares with other system components and the two channels monitor a single node pair (for example 3.3 V rail and 1.2 V core). The MSOP-10 footprint sits comfortably next to a multi-rail DC-DC converter. Post-mortem data captured at fault time helps root-cause analysis.
Recommended
Test & Measurement Front-End
Bench instruments and data loggers that need compact, multi-channel digitizing benefit from the AD7992BRMZ-1-R2's 2 us conversion time and small 10-MSOP footprint. The 12-bit SAR core plus external reference delivers calibrated measurements traceable to the reference standard, while I2C connectivity pairs naturally with a Raspberry Pi or microcontroller host. Designers can scale to 4, 8, or 16 channels by adding AD7994 or AD7997 parts on the same bus.
Recommended
Recommended Products Summary
Engineering reference data for AD7992BRMZ-1-R2 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7992BRMZ-0 | AD7991BRMZ | AD7992BRMZ-1REEL7 | AD7992BRMZ-1REEL |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) | 10-MSOP (RM-10) |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits |
| Input Channels | 2 | 2 | 1 | 2 | 2 |
| Maximum I2C Speed | 3.4 MHz (high-speed) | 400 kHz (fast mode) | 3.4 MHz (high-speed) | 3.4 MHz (high-speed) | 3.4 MHz (high-speed) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Conversion Time | 2 us | 2 us | 2 us | 2 us | 2 us |
| Reel Quantity | 250 (R2 suffix) | 50 (Tube) or 1k (REEL) | 50 (Tube) or 1k (REEL) | 500 (REEL7) | 1000 (REEL) |
| Release Form | Tape & Reel, 250 pcs (R2) | Tray / Reel | Tray / Reel | Tape & Reel, 500 pcs | Tape & Reel, 1000 pcs |
Key Differentiators
- High-speed I2C up to 3.4 MHz (vs AD7992BRMZ-0)
- 2-channel multiplexer in 10-MSOP (vs AD7991BRMZ)
- Smaller reel size for low-volume builders (vs AD7992BRMZ-1REEL)
Design Notes
Estimated: at VDD = 5 V and maximum I2C bus activity, the AD7992 draws a few milliwatts; budget 50 mW worst-case for power-rail sizing. Place a 0.1 uF X7R ceramic within 5 mm of the VDD pin and add a 10 uF tantalum or polymer bulk capacitor at the regulator output to absorb I2C burst transients.
Keep analog and digital grounds joined at a single star point under the GND pin to avoid digital return currents corrupting the analog conversion. Route the analog inputs (AIN1/AIN2) and REF away from switching nodes and from the SDA/SCL traces to minimize digital-coupling noise. Place the external reference decoupling cap (typically 1 uF) directly at the REF pin.
Do not operate without the external reference: the AD7992BRMZ-1-R2 has no internal VREF, so leaving REF floating produces indeterminate output codes. Size I2C pull-ups for the chosen bus speed (4.7 kohm typical at 400 kHz; 1 kohm required for reliable high-speed 3.4 MHz operation); undersized pull-ups cause timing violations and bus errors.
Compliance Information
RoHS and lead-free compliance per Analog Devices product page. AEC-Q100 qualification status not stated in the verified web data; automotive designers should confirm directly with the factory. Halogen-free status marked unknown as it was not present in the verified sources.
