AD7091R-5BRUZ-RL7 - 4-Ch 12-Bit I2C ADC | Analog Devices
MPN: AD7091R-5BRUZ-RL7 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.42 | $8.42 |
| 10 | $7.8 | $78.00 |
| 100 | $6.95 | $695.00 |
| 500 | $6.2 | $3,100.00 |
| 1,000 | $5.6 | $5,600.00 |
AD7091R-5BRUZ-RL7 Overview
An ADC (analog-to-digital converter) is a device that converts continuous analog signals into discrete digital numbers. The AD7091R-5 is a SAR (successive approximation register) ADC, which uses a binary search algorithm to determine the digital output. SAR ADCs are known for their high speed, low power, and small size, making them suitable for a wide range of applications from industrial process control to portable medical devices. As a data converter, it sits within the broader category of mixed-signal ICs, bridging the analog and digital domains.
Key features include four single-ended analog input channels, an on-chip accurate 2.5 V reference, a channel sequencer for preprogrammed channel selection, and a programmable out-of-bounds user alert function. The device also features an on-chip conversion clock, eliminating the need for an external clock source. The I2C interface supports standard, fast, and high-speed modes, with a maximum throughput of 1 MSPS.
The AD7091R-5 uses a low-power architecture that minimizes current consumption, with a typical supply current of 24 µA at 3 V in fast mode. The device includes a power-down mode that reduces current to less than 1 µA, extending battery life in portable applications. The internal reference provides a stable 2.5 V output, and the device can also operate with an external reference if required.
Typical applications include battery monitoring, portable instrumentation, medical devices, and industrial process control. The I2C interface simplifies connection to microcontrollers and digital signal processors, while the small 20-lead TSSOP package saves board space. The device is specified over the industrial temperature range of -40°C to +125°C.
When designing with this ADC, ensure that the analog input voltage does not exceed the supply voltage to avoid damage. Use a decoupling capacitor on the reference pin to maintain accuracy. The I2C address is set by the ADDR pin, allowing multiple devices on the same bus.
Drop-in alternatives for AD7091R-5BRUZ-RL7 — 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 AD7091R-5BRUZ-RL7 (same form factor and footprint) — differing in Interface, Number of Channels, Package, Sampling Rate, Internal Reference.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7091R-5BRUZ
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →AD7091R-2BRUZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.83 / Unit
View Datasheet →AD7091R-4BRUZ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$3.04 / Unit
View Datasheet →ADS7830
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MAX1169
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7091R-5BRUZ-RL7 Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Channels | 4 single-ended |
| Interface | I2C |
| Supply Voltage | 2.7 V to 5.25 V |
| Supply Current (typical) | 24 µA at 3 V (fast mode) |
| Power-Down Current | < 1 µA |
| Internal Reference | 2.5 V |
| Throughput Rate | 1 MSPS |
| Package | 20-Lead TSSOP |
| Operating Temperature Range | -40°C to +125°C |
| Input Type | Single-ended |
| Conversion Clock | On-chip |
| Channel Sequencer | Yes |
| Alert Function | Programmable out-of-bounds |
| RoHS Status | Compliant |
AD7091R-5BRUZ-RL7 Pin Configuration
| Pin 1 | VDD — Power supply input, 2.7 V to 5.25 V |
| Pin 2 | VIN0 — Analog input channel 0 |
| Pin 3 | VIN1 — Analog input channel 1 |
| Pin 4 | VIN2 — Analog input channel 2 |
| Pin 5 | VIN3 — Analog input channel 3 |
| Pin 6 | GND — Ground |
| Pin 7 | SDA — I2C data line |
| Pin 8 | SCL — I2C clock line |
| Pin 9 | ADDR — I2C address select |
| Pin 10 | ALERT — Out-of-bounds alert output |
| Pin 11 | REF — Reference voltage input/output |
| Pin 12 | REFIN — Reference input for external reference |
| Pin 13 | CONVST — Conversion start input |
| Pin 14 | NC — No connect |
| Pin 15 | NC — No connect |
| Pin 16 | NC — No connect |
| Pin 17 | NC — No connect |
| Pin 18 | NC — No connect |
| Pin 19 | NC — No connect |
| Pin 20 | NC — No connect |
Typical Applications
AD7091R-5BRUZ-RL7 is suitable for 6 applications: Battery Monitoring, Portable Instrumentation, Medical Devices, Industrial Process Control, IoT Sensors, Data Acquisition Systems.
Battery Monitoring
The AD7091R-5BRUZ-RL7 is ideal for battery monitoring in portable devices due to its ultralow power consumption of 24 µA at 3 V. It can measure battery voltage and current with 12-bit resolution, enabling accurate state-of-charge estimation. The I2C interface simplifies connection to a host microcontroller, and the power-down mode extends battery life. The internal 2.5 V reference ensures stable measurements over temperature.
Recommended
Portable Instrumentation
In portable instruments like multimeters and data loggers, the AD7091R-5BRUZ-RL7 provides low-power, high-speed conversion. Its 1 MSPS throughput allows fast sampling of transient signals, while the 4 channels enable monitoring multiple sensors. The small TSSOP package and I2C interface reduce board space and wiring. The device operates from 2.7 V to 5.25 V, compatible with battery supplies. The alert function can signal out-of-range conditions without waking the host processor.
Recommended
Medical Devices
The AD7091R-5BRUZ-RL7 is suitable for medical devices such as patient monitors and glucose meters. Its low power consumption is critical for battery-operated devices, and the 12-bit resolution is sufficient for vital sign monitoring. The I2C interface allows easy integration with medical-grade microcontrollers. The wide temperature range ensures reliable operation in clinical environments. The internal reference reduces external component count, improving reliability.
Recommended
Industrial Process Control
In industrial process control, the AD7091R-5BRUZ-RL7 monitors analog signals from sensors like temperature and pressure. Its 4 channels allow multiplexing multiple sensors, and the channel sequencer automates conversion. The device operates over -40°C to +125°C, suitable for harsh environments. The I2C interface can be isolated using digital isolators. The 1 MSPS throughput enables real-time control loops. The alert function provides early warning of process anomalies.
Recommended
IoT Sensors
The AD7091R-5BRUZ-RL7 is perfect for IoT sensor nodes that require low power and small size. Its 24 µA supply current and <1 µA power-down mode extend battery life in wireless sensors. The I2C interface connects directly to common IoT microcontrollers like ESP32. The 12-bit resolution is adequate for environmental monitoring. The internal reference eliminates external components, reducing BOM cost. The device can be powered from a 3.3 V rail, common in IoT designs.
Recommended
Data Acquisition Systems
The AD7091R-5BRUZ-RL7 is used in data acquisition systems for its high speed and low power. It can sample up to 1 MSPS, capturing fast signals. The 4 channels allow simultaneous monitoring of multiple signals. The I2C interface is easy to interface with FPGAs and microcontrollers. The device's small package is ideal for compact DAQ modules. The internal reference ensures accurate conversions. The alert function can trigger data logging on out-of-range events.
Recommended
Recommended Products Summary
Engineering reference data for AD7091R-5BRUZ-RL7 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7091R-5BRUZ | AD7091R-2BRUZ | AD7091R-4BRUZ | ADS7830 | MAX1169 |
|---|---|---|---|---|---|---|
| Package | 20-Lead TSSOP | 20-Lead TSSOP | 20-Lead TSSOP | 20-Lead TSSOP | 20-Lead TSSOP | 20-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Maxim Integrated |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits | 12 bits | 16 bits |
| Number of Channels | 4 | 4 | 2 | 4 | 8 | 4 |
| Interface | I2C | I2C | I2C | I2C | I2C | I2C |
| Supply Voltage | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.25 V | 2.7 V to 5.5 V | 2.7 V to 3.6 V |
| Supply Current (typical) | 24 µA at 3 V | 24 µA at 3 V | 24 µA at 3 V | 24 µA at 3 V | 0.75 mA at 3 V | 0.9 mA at 3 V |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 2.5 V | 4.096 V |
Key Differentiators
- Ultralow power consumption (vs ADS7830)
- Internal 2.5 V reference (vs MAX1169)
- Wide supply voltage range (vs MAX1169)
Design Notes
The AD7091R-5BRUZ-RL7 operates from 2.7 V to 5.25 V. Use a low-impedance supply and place a 0.1 µF decoupling capacitor close to the VDD pin. For optimal performance, a 10 µF capacitor may be added if the supply is noisy. The device consumes only 24 µA at 3 V, so power supply design is straightforward.
For accurate conversions, keep analog input traces short and away from digital signals. Use a ground plane to minimize noise. Place the reference decoupling capacitor (0.1 µF) close to the REF pin. The I2C lines (SDA, SCL) should have pull-up resistors (typically 4.7 kΩ) to VDD.
Ensure the analog input voltage does not exceed VDD or go below GND to avoid damaging the device. The I2C address is set by the ADDR pin; connect it to VDD or GND to select one of two addresses. Do not leave the CONVST pin floating; tie it to VDD for continuous conversion mode or use it for external triggering.
Compliance Information
RoHS compliant per Analog Devices product page. Other compliance data not specified in provided sources.
