AD7091R-5BRUZ - 12-Bit Ultralow Power ADC | Analog Devices
MPN: AD7091R-5BRUZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
Drop-in alternatives for AD7091R-5BRUZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7091R-2BRUZ
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View Datasheet →AD7091R-4BRUZ
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View Datasheet →AD7091R-5BRUZ-RL7
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View Datasheet →MCP3201
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AD7091R-5BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Input Channels | 4 single-ended |
| Architecture | SAR |
| Supply Voltage | 2.7 V to 5.25 V |
| Interface | I2C (2-wire) |
| I2C Speed | 400 kHz (fast mode) |
| Throughput Rate | 22.22 kSPS (I2C fast mode) |
| Power Consumption | 24 µA at 3 V (fast mode) |
| Internal Reference | 2.5 V |
| Reference Accuracy | ±0.1% typical |
| Reference Temperature Coefficient | 10 ppm/°C |
| Operating Temperature Range | -40°C to +125°C |
| Package | 20-lead TSSOP |
| Mounting Type | Surface Mount |
| RoHS | Compliant |
AD7091R-5BRUZ 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 | VREF — Reference voltage input/output, bypass with 1 µF |
| Pin 8 | VDRIVE — Logic supply for I2C interface, 1.8 V to 5.25 V |
| Pin 9 | SDA — I2C data line |
| Pin 10 | SCL — I2C clock line |
| Pin 11 | A0 — I2C address bit 0 |
| Pin 12 | A1 — I2C address bit 1 |
| Pin 13 | A2 — I2C address bit 2 |
| Pin 14 | CONVST/GPO1 — Conversion start or general-purpose output |
| Pin 15 | ALERT — Out-of-bounds alert output |
| Pin 16 | GPO2 — General-purpose output 2 |
| Pin 17 | GPO3 — General-purpose output 3 |
| Pin 18 | NC — No connect |
| Pin 19 | NC — No connect |
| Pin 20 | EP — Exposed pad, connect to GND |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
AD7091R-5BRUZ is suitable for 6 applications: Portable Instrumentation, Battery Monitoring, Temperature Sensing, Industrial Process Control, Medical Instrumentation, Data Acquisition Systems.
Portable Instrumentation
The AD7091R-5BRUZ is ideal for portable instrumentation due to its ultralow power consumption of 24 µA at 3 V, which extends battery life. Its 12-bit resolution and 4 input channels allow monitoring multiple sensors, such as temperature and pressure, with minimal power draw. The I2C interface simplifies connection to low-power microcontrollers, and the internal 2.5 V reference reduces external components, saving board space in handheld devices.
Recommended
Battery Monitoring
In battery monitoring systems, the AD7091R-5BRUZ provides accurate voltage and current sensing with 12-bit resolution. Its ultralow power consumption ensures minimal impact on battery life, and the 4 input channels can monitor multiple cells or parameters. The programmable out-of-bounds alert function can trigger interrupts when voltages exceed thresholds, enabling proactive battery management. The I2C interface allows easy integration with battery management ICs.
Recommended
Temperature Sensing
The AD7091R-5BRUZ is well-suited for temperature sensing applications, offering 12-bit resolution and 4 input channels to read multiple thermocouples or RTDs. Its ultralow power consumption is beneficial for remote sensors, and the internal reference ensures accurate conversions. The I2C interface allows daisy-chaining multiple ADCs for expanded channel count. The wide operating temperature range of -40°C to +125°C ensures reliable operation in harsh environments.
Recommended
Industrial Process Control
In industrial process control, the AD7091R-5BRUZ provides reliable analog-to-digital conversion for monitoring process variables such as pressure, flow, and level. Its 12-bit resolution and 4 input channels allow multiplexing multiple sensors, while the I2C interface simplifies integration with PLCs and microcontrollers. The wide operating temperature range and RoHS compliance make it suitable for industrial environments. The programmable alert function can signal out-of-bounds conditions, enabling automated responses.
Recommended
Medical Instrumentation
The AD7091R-5BRUZ is suitable for portable medical devices such as glucose monitors and pulse oximeters, where ultralow power consumption is critical for battery life. Its 12-bit resolution provides sufficient accuracy for vital sign monitoring, and the 4 input channels can acquire multiple physiological signals. The I2C interface allows connection to medical-grade microcontrollers, and the small TSSOP package fits compact designs. The internal reference reduces component count, enhancing reliability.
Recommended
Data Acquisition Systems
The AD7091R-5BRUZ is a key component in data acquisition systems, providing 12-bit conversion of multiple analog signals with minimal power consumption. Its 4 input channels and channel sequencer allow automatic scanning of sensors without microcontroller intervention, reducing software overhead. The I2C interface enables easy integration with data loggers and embedded systems. The internal 2.5 V reference ensures accurate conversions, and the wide temperature range supports various environments.
Recommended
Recommended Products Summary
Engineering reference data for AD7091R-5BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7091R-2BRUZ | AD7091R-4BRUZ | MCP3201 |
|---|---|---|---|---|
| Package | 20-lead TSSOP | 20-lead TSSOP | 20-lead TSSOP | 20-lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Microchip Technology |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Input Channels | 4 | 2 | 4 | 1 |
| Interface | I2C | I2C | I2C | SPI |
| Internal Reference | Yes (2.5 V) | Yes (2.5 V) | No | No |
| Power Consumption | 24 µA at 3 V | 24 µA at 3 V | 24 µA at 3 V | 220 µA at 5 V |
| Throughput Rate | 22.22 kSPS (I2C) | 22.22 kSPS (I2C) | 22.22 kSPS (I2C) | 100 kSPS (SPI) |
Key Differentiators
- Ultralow power consumption of 24 µA at 3 V (vs MCP3201)
- Internal 2.5 V reference (vs AD7091R-4BRUZ)
- 4 input channels with channel sequencer (vs AD7091R-2BRUZ)
Design Notes
Decouple the VDD pin with a 0.1 µF and a 10 µF capacitor placed as close to the pin as possible. The VDRIVE pin should be decoupled with a 0.1 µF capacitor to ensure stable logic levels. The reference pin (VREF) must be bypassed with a 1 µF capacitor to ground to ensure stable operation of the internal reference.
Keep analog input traces short and shielded from digital noise to maintain 12-bit accuracy. Use a ground plane under the ADC to minimize noise coupling. The I2C bus requires pull-up resistors, typically 4.7 kΩ, to VDRIVE. Ensure the pull-up resistors are connected to the correct logic supply voltage.
Do not exceed the absolute maximum ratings for VDD and VDRIVE. Ensure the I2C address pins (A0, A1, A2) are properly set to avoid address conflicts. The CONVST/GPO1 pin can be used for external conversion start; if unused, tie it to a defined logic level. The ALERT pin is open-drain and requires a pull-up resistor.
Compliance Information
RoHS compliant per Analog Devices datasheet. Lead-free per RoHS compliance. AEC-Q100 not applicable as this is not an automotive-grade part. REACH and conflict minerals status not specified in verified data.
