AD7091R-4BRUZ - 4-Ch 12-Bit 1MSPS SAR ADC | Analog Devices
MPN: AD7091R-4BRUZ β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.1 | $41.00 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.9 | $2,900.00 |
Drop-in alternatives for AD7091R-4BRUZ β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
AD7091R-4BRUZ-RL7
β Drop-Inπ Reference alternative (not in catalog)
AD7091R-2BRUZ
β Drop-Inβ In Stock
$3.04 / Unit
View Datasheet βMAX11108
β Drop-Inπ Reference alternative (not in catalog)
ADS7042
β Drop-Inπ Reference alternative (not in catalog)
AD7091R-4BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 12-bit |
| Number of Channels | 4 single-ended |
| Sampling Rate | 1 MSPS |
| Input Voltage Range | 0 V to VREF |
| Supply Voltage Range | 2.7 V to 5.25 V |
| Reference Voltage | 2.5 V (internal) |
| Power Consumption (Normal Mode) | 1.4 mW at 1 MSPS |
| Power-Down Current | 550 nA typical at VDD = 5.25 V, 435 nA at VDD = 3 V |
| Interface | SPI |
| Package | 20-lead TSSOP |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Integral Nonlinearity (INL) | [DATA_NEEDED: INL value] |
| Signal-to-Noise Ratio (SNR) | [DATA_NEEDED: SNR value] |
| Spurious-Free Dynamic Range (SFDR) | [DATA_NEEDED: SFDR value] |
| RoHS Status | Compliant |
AD7091R-4BRUZ Pin Configuration
| Pin 1 | VDD β Power supply input, 2.7 V to 5.25 V |
| Pin 2 | VIN0 β Analog input channel 0 |
| Pin 3 | VIN1 β Analog input channel 1 |
| Pin 4 | VIN2 β Analog input channel 2 |
| Pin 5 | VIN3 β Analog input channel 3 |
| Pin 6 | GND β Ground |
| Pin 7 | VREF β Reference voltage input/output (internal 2.5 V) |
| Pin 8 | CONVST β Conversion start input |
| Pin 9 | SCLK β Serial clock input |
| Pin 10 | SDI β Serial data input |
| Pin 11 | SDO β Serial data output |
| Pin 12 | ALERT β Programmable alert output (active low) |
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-4BRUZ is suitable for 6 applications: Battery-Powered Instrumentation, Portable Medical Devices, Industrial Process Control, Data Acquisition Systems, IoT and Smart Sensors, Automotive Test Equipment.
Battery-Powered Instrumentation
The AD7091R-4BRUZ's ultralow power consumption (1.4 mW at 1 MSPS) and power-down mode (550 nA) make it ideal for battery-powered instruments. Its 4 channels can monitor multiple sensors, and the SPI interface allows easy integration with low-power microcontrollers. The internal 2.5 V reference reduces external component count, saving board space and power. The 1 MSPS sampling rate is sufficient for most sensor monitoring applications, while the power-down mode extends battery life during idle periods.
Recommended
Portable Medical Devices
In portable medical devices like glucose monitors and pulse oximeters, the AD7091R-4BRUZ provides high-resolution (12-bit) conversion of physiological signals. Its low power consumption is critical for battery operation, and the small 20-TSSOP package fits compact designs. The internal reference ensures accuracy without external components. The SPI interface allows direct connection to medical-grade microcontrollers. The device's wide operating temperature range (-40Β°C to +125Β°C) ensures reliability in clinical environments.
Recommended
Industrial Process Control
The AD7091R-4BRUZ is suitable for industrial process control systems that monitor temperature, pressure, and flow. Its 4 channels can acquire multiple sensor signals simultaneously, and the channel sequencer simplifies multiplexing. The 1 MSPS sampling rate allows fast response to process changes. The device operates from 2.7 V to 5.25 V, compatible with common industrial supply rails. The SPI interface enables isolation with digital isolators if needed. The ALERT pin can signal out-of-range conditions, reducing MCU polling.
Recommended
Data Acquisition Systems
The AD7091R-4BRUZ is a key component in data acquisition systems (DAQ) for test and measurement. Its 12-bit resolution and 1 MSPS sampling rate provide accurate digitization of analog signals. The internal reference and conversion clock simplify design, and the SPI interface allows high-speed data transfer to FPGAs or DSPs. The low power consumption is beneficial in multi-channel DAQ systems where many ADCs are used. The device's small package enables high-density designs.
Recommended
IoT and Smart Sensors
In IoT and smart sensor nodes, the AD7091R-4BRUZ provides low-power analog-to-digital conversion for environmental sensors (temperature, humidity, gas). Its ultralow power consumption is essential for battery-powered or energy-harvesting devices. The power-down mode (550 nA) allows the ADC to be shut down between measurements, extending battery life. The SPI interface connects easily to low-power MCUs like STM32L0 series. The internal reference reduces external components, making the design compact and cost-effective.
Recommended
Automotive Test Equipment
The AD7091R-4BRUZ is used in automotive test equipment for monitoring battery voltage, current, and temperature. Its wide supply range (2.7 V to 5.25 V) accommodates automotive battery voltages. The 4 channels can monitor multiple parameters simultaneously. The device's low power consumption reduces heat generation in enclosed test equipment. The SPI interface allows connection to automotive-grade MCUs. The operating temperature range (-40Β°C to +125Β°C) meets automotive requirements.
Recommended
Recommended Products Summary
Engineering reference data for AD7091R-4BRUZ β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7091R-4BRUZ-RL7 | AD7091R-2BRUZ | AD7091R-8BRUZ | MAX11108 | ADS7042 |
|---|---|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP | 20-TSSOP | 24-TSSOP | 20-TSSOP | 20-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Maxim Integrated | Texas Instruments |
| Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Number of Channels | 4 | 4 | 2 | 8 | 8 | 1 |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 MSPS | 1 MSPS | 2 MSPS | 1 MSPS |
| Supply Voltage Range | 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 3.6 V | 1.65 V to 3.6 V |
| Internal Reference | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | Yes (2.5 V) | No |
| Power Consumption (Normal Mode) | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS | 1.2 mW at 2 MSPS | 0.5 mW at 1 MSPS |
Key Differentiators
- Ultralow power consumption (vs ADS7042)
- Internal 2.5 V reference (vs ADS7042)
- 4-channel input (vs ADS7042)
Design Notes
The AD7091R-4BRUZ operates from 2.7 V to 5.25 V. Use a low-impedance supply and place a 0.1 Β΅F decoupling capacitor close to the VDD pin. For optimal performance, a 10 Β΅F capacitor in parallel is recommended. The power-down mode reduces current to 550 nA, so ensure the supply can handle the transient when waking up.
Place the ADC close to the signal source to minimize trace length and reduce noise pickup. Use a ground plane under the device and route analog inputs away from digital signals. The VREF pin should have a 0.1 Β΅F capacitor to ground. For best performance, use a low-pass filter on each analog input to remove high-frequency noise.
Do not exceed the absolute maximum ratings: VDD to GND should not exceed 6 V, and analog inputs should not go below GND or above VDD + 0.3 V. The CONVST pin must be low during conversion to avoid errors. Ensure the SPI clock frequency is within the specified range to guarantee 1 MSPS throughput.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
