AD7091R-4BRUZ - 4-Ch 12-Bit 1MSPS SAR ADC | Analog Devices
MPN: AD7091R-4BRUZ β 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-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-2BRUZ
β In Stock
$3.1 / Unit
View Datasheet βAD7091R-4BRUZ-RL7
π Reference alternative (not in catalog)
AD7091R-8BRUZ
π Reference alternative (not in catalog)
AD7091R-2BRUZ-RL7
π Reference alternative (not in catalog)
AD7091R-8BRUZ-RL7
π Reference alternative (not in catalog)
AD7091R-4BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 12 bits |
| Number of Channels | 4 single-ended |
| Sampling Rate | 1 MSPS |
| Supply Voltage Range | 2.7 V to 5.25 V |
| Power Consumption (Normal Mode) | 1.4 mW at 1 MSPS |
| Power-Down Current (VDD = 5.25 V) | 550 nA typical |
| Power-Down Current (VDD = 3 V) | 435 nA typical |
| Internal Reference Voltage | 2.5 V |
| Interface | SPI |
| Package | 20-lead TSSOP |
| Operating Temperature Range | -40Β°C to +125Β°C |
| Input Type | Single-ended |
| Architecture | SAR |
| On-Chip Conversion Clock | Yes |
| Programmable ALERT Pin | Yes (4-/8-channel models) |
| Channel Sequencer | Yes |
| 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 | CONVST β Conversion start input |
| Pin 8 | SCLK β Serial clock input |
| Pin 9 | DIN β Serial data input |
| Pin 10 | DOUT β Serial data output |
| Pin 11 | CS β Chip select input |
| Pin 12 | ALERT β Programmable alert output |
| Pin 13 | REF β Reference voltage input/output |
| Pin 14 | REFIN β Reference input |
| Pin 15 | REFOUT β Reference output |
| Pin 16 | GND β Ground |
| Pin 17 | GND β Ground |
| Pin 18 | GND β Ground |
| Pin 19 | GND β Ground |
| Pin 20 | GND β Ground |
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, Test and Measurement Equipment.
Battery-Powered Instrumentation
The AD7091R-4BRUZ's ultralow power consumption of 1.4 mW at 1 MSPS and power-down current as low as 435 nA make it ideal for battery-powered instruments. Its 4-channel input allows monitoring multiple sensors while the SPI interface simplifies data transfer to a microcontroller. The internal 2.5 V reference reduces external component count, saving board space and power. With a 2.7 V to 5.25 V supply range, it can operate directly from a 3.3 V or 5 V battery rail, extending battery life in portable multimeters, data loggers, and handheld analyzers.
Recommended
Portable Medical Devices
In portable medical devices such as glucose monitors, pulse oximeters, and wearable health trackers, the AD7091R-4BRUZ provides high-resolution 12-bit conversion with minimal power draw. Its 1 MSPS sampling rate is sufficient for most biosignal acquisition, while the power-down mode (435 nA at 3 V) preserves battery life during idle periods. The small 20-lead TSSOP package fits compact PCB designs, and the SPI interface connects easily to low-power microcontrollers. The internal reference ensures stable measurements across temperature variations, critical for medical accuracy.
Recommended
Industrial Process Control
The AD7091R-4BRUZ is well-suited for industrial process control systems that monitor temperature, pressure, and flow sensors. Its 4-channel input allows multiplexing multiple sensors without an external mux, and the channel sequencer can automatically cycle through channels, reducing microcontroller overhead. The 1 MSPS throughput enables fast response to process changes, while the wide 2.7 V to 5.25 V supply range accommodates industrial power rails. The SPI interface provides noise-immune communication over short distances, and the ALERT pin can trigger interrupts on out-of-range conditions, enabling rapid fault detection.
Recommended
Data Acquisition Systems
In data acquisition systems (DAQ), the AD7091R-4BRUZ offers a balance of speed, resolution, and power efficiency. Its 12-bit resolution and 1 MSPS sampling rate are adequate for many industrial and laboratory DAQ applications. The SPI interface allows easy integration with FPGAs or microcontrollers, and the internal reference simplifies design. The channel sequencer enables efficient scanning of multiple analog inputs, making it ideal for multi-sensor data logging. The low power consumption is beneficial in remote or battery-powered DAQ nodes, and the small package allows high-density channel cards.
Recommended
IoT and Smart Sensors
The AD7091R-4BRUZ is ideal for IoT and smart sensor nodes that require low power and small size. Its ultralow power consumption (1.4 mW at 1 MSPS, 435 nA power-down) extends battery life in wireless sensors. The 4-channel input allows monitoring multiple environmental parameters (temperature, humidity, light) with a single ADC. The SPI interface connects to low-power MCUs like the STM32L4 series, and the internal reference reduces external components. The 20-lead TSSOP package is compact enough for space-constrained IoT modules, and the wide supply range supports energy harvesting designs.
Recommended
Test and Measurement Equipment
In test and measurement equipment such as digital multimeters, oscilloscopes, and spectrum analyzers, the AD7091R-4BRUZ provides accurate 12-bit conversion with a fast 1 MSPS sampling rate. Its low power consumption is beneficial in portable test instruments, and the internal reference ensures measurement accuracy. The SPI interface allows high-speed data transfer to DSPs or FPGAs for real-time analysis. The channel sequencer enables multi-channel measurements, and the ALERT pin can be used for threshold detection. The small package allows compact instrument designs, and the wide supply range supports various power architectures.
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-2BRUZ | AD7091R-4BRUZ-RL7 | AD7091R-8BRUZ |
|---|---|---|---|---|
| Package | 20-lead TSSOP | 20-lead TSSOP | 20-lead TSSOP | 24-lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 12 bits | 12 bits | 12 bits | 12 bits |
| Number of Channels | 4 | 2 | 4 | 8 |
| Sampling Rate | 1 MSPS | 1 MSPS | 1 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 |
| Power Consumption (Normal) | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS | 1.4 mW at 1 MSPS |
| Power-Down Current | 550 nA at 5.25 V, 435 nA at 3 V | 550 nA at 5.25 V, 435 nA at 3 V | 550 nA at 5.25 V, 435 nA at 3 V | 550 nA at 5.25 V, 435 nA at 3 V |
| Internal Reference | 2.5 V | 2.5 V | 2.5 V | 2.5 V |
| Interface | SPI | SPI | SPI | SPI |
| ALERT Pin | Yes | No | Yes | Yes |
Key Differentiators
- Ultralow power consumption (vs AD7091R-2BRUZ)
- Programmable ALERT pin (vs AD7091R-2BRUZ)
- 4-channel input with sequencer (vs AD7091R-8BRUZ)
Design Notes
The AD7091R-4BRUZ consumes only 1.4 mW at 1 MSPS, but power scales with throughput. Use the power-down mode (435 nA at 3 V) between conversions to minimize average power in battery-powered designs. Ensure the supply voltage is within 2.7 V to 5.25 V and decouple VDD with a 0.1 Β΅F ceramic capacitor close to the pin.
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 traces. Add a low-pass filter (e.g., RC) on each analog input to reduce aliasing and high-frequency noise. The reference output (REFOUT) should be bypassed with a 1 Β΅F capacitor to ground.
Do not exceed the supply voltage on any analog input, as this can damage the device. Ensure the CONVST signal is properly timed to avoid metastability. The SPI interface should be operated within the specified clock frequency to guarantee 1 MSPS throughput. If using an external reference, ensure it is stable and within the specified input range.
Compliance Information
RoHS compliance inferred from Analog Devices standard product status. Other compliance data not explicitly provided in verified data.
