AD7172-2BRUZ - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7172-2BRUZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.5 | $13.50 |
| 10 | $12.15 | $121.50 |
| 100 | $10.8 | $1,080.00 |
| 500 | $9.72 | $4,860.00 |
| 1,000 | $8.64 | $8,640.00 |
Drop-in alternatives for AD7172-2BRUZ — 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:
AD7175-2BRUZ
✅ Drop-In✓ In Stock
$9.62 / Unit
View Datasheet →AD7176-2BRUZ
✅ Drop-In✓ In Stock
$9.5 / Unit
View Datasheet →AD7177-2BRUZ
✅ Drop-In✓ In Stock
$38.1818 / Unit
View Datasheet →AD7124-4BRUZ
✅ Drop-In✓ In Stock
$7.9545 / Unit
View Datasheet →AD7799BRUZ
✅ Drop-In✓ In Stock
$5.41 / Unit
View Datasheet →AD7172-2BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Input Channels | 2 Differential or 4 Single-Ended |
| Input Type | Differential, Single-Ended |
| Data Interface | SPI |
| Sampling Rate | 31.25 kSPS |
| Architecture | Sigma-Delta |
| Reference Type | External, Internal |
| Voltage - Supply, Analog | 2.5 V to 5.5 V |
| Voltage - Supply, Digital | 2.5 V to 5.5 V |
| Operating Temperature Range | -40°C to +105°C |
| Package / Case | 24-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Number of Bits | 24 |
| Number of A/D Converters | 1 |
| Features | True Rail-to-Rail Buffers, 50/60 Hz Rejection |
| RoHS Status | Compliant |
AD7172-2BRUZ Pin Configuration
| Pin 1 | AVDD — Analog power supply |
| Pin 2 | AIN0 — Analog input 0 |
| Pin 3 | AIN1 — Analog input 1 |
| Pin 4 | AIN2 — Analog input 2 |
| Pin 5 | AIN3 — Analog input 3 |
| Pin 6 | REF+ — Positive reference input |
| Pin 7 | REF- — Negative reference input |
| Pin 8 | GND — Ground |
| Pin 9 | DVDD — Digital power supply |
| Pin 10 | SCLK — Serial clock input |
| Pin 11 | DIN — Serial data input |
| Pin 12 | DOUT — Serial data output |
| Pin 13 | CS — Chip select |
| Pin 14 | SYNC — Synchronization input |
| Pin 15 | RESET — Reset input |
| Pin 16 | GPIO0 — General purpose I/O |
| Pin 17 | GPIO1 — General purpose I/O |
| Pin 18 | GPIO2 — General purpose I/O |
| Pin 19 | GPIO3 — General purpose I/O |
| Pin 20 | AVDD — Analog power supply |
| Pin 21 | AVDD — Analog power supply |
| Pin 22 | GND — Ground |
| Pin 23 | GND — Ground |
| Pin 24 | GND — 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
AD7172-2BRUZ is suitable for 6 applications: Temperature Measurement, Weigh Scale Systems, Pressure Sensing, Industrial Process Control, Medical Instrumentation, Portable Instrumentation.
Temperature Measurement
The AD7172-2BRUZ is ideal for temperature measurement systems such as thermocouple and RTD interfaces. Its 24-bit resolution and low noise ensure accurate temperature readings. The integrated buffers allow direct connection to high-impedance sensors without external amplifiers. The device's 50/60 Hz rejection mode helps eliminate power line interference, making it suitable for industrial environments. With a supply voltage range of 2.5 V to 5.5 V, it can be powered from common 3.3 V or 5 V rails. The SPI interface simplifies communication with microcontrollers. For best performance, an external reference like the ADR445 is recommended. The AD7172-2's low power consumption makes it suitable for battery-powered temperature loggers.
Recommended
Weigh Scale Systems
The AD7172-2BRUZ is well-suited for weigh scale systems that require high resolution and accuracy. Its 24-bit sigma-delta architecture provides the precision needed to measure small changes in load cell output. The device's low noise performance ensures stable readings. The integrated buffers allow direct connection to load cells without additional signal conditioning. The SPI interface enables easy integration with microcontrollers for data processing. The device's power consumption is low, making it suitable for portable scales. The 50/60 Hz rejection mode helps filter out power line noise, which is common in industrial environments. The AD7172-2's wide supply voltage range allows it to be used in both battery-powered and line-powered scales.
Recommended
Pressure Sensing
The AD7172-2BRUZ is ideal for pressure sensing applications, such as industrial process control and medical devices. Its high resolution and low noise allow accurate measurement of pressure transducer outputs. The device's true rail-to-rail buffers simplify interfacing with bridge-type sensors. The SPI interface provides easy communication with host processors. The AD7172-2's low power consumption is beneficial for battery-powered pressure loggers. The device's 50/60 Hz rejection mode helps reduce interference from power lines. With a supply voltage range of 2.5 V to 5.5 V, it can be used in various systems. The integrated digital filter allows trade-offs between speed and noise.
Recommended
Industrial Process Control
The AD7172-2BRUZ is suitable for industrial process control systems that require high-accuracy analog-to-digital conversion. Its 24-bit resolution and low noise ensure precise monitoring of process variables such as temperature, pressure, and flow. The device's multiple input channels allow multiplexing of several sensors. The SPI interface enables integration with PLCs and microcontrollers. The AD7172-2's robust design operates over a wide temperature range (-40°C to +105°C). The 50/60 Hz rejection mode is beneficial in industrial environments with power line noise. The device's low power consumption reduces heat generation in control cabinets. The integrated buffers simplify sensor interfacing.
Recommended
Medical Instrumentation
The AD7172-2BRUZ is used in medical instrumentation such as patient monitoring and diagnostic equipment. Its high resolution and low noise are critical for accurate measurement of physiological signals. The device's low power consumption is essential for battery-powered portable devices. The integrated buffers allow direct connection to sensors like ECG electrodes and temperature probes. The SPI interface provides easy integration with medical-grade microcontrollers. The AD7172-2's small TSSOP-24 package saves board space in compact devices. The device's wide supply voltage range accommodates various battery configurations. The 50/60 Hz rejection mode helps reduce interference from mains-powered equipment.
Recommended
Portable Instrumentation
The AD7172-2BRUZ is ideal for portable instrumentation due to its low power consumption and high resolution. It can be used in handheld multimeters, data loggers, and field analyzers. The device operates from a 2.5 V to 5.5 V supply, making it compatible with single-cell batteries. The SPI interface allows efficient communication with low-power microcontrollers. The integrated buffers reduce external component count, saving space and power. The AD7172-2's small TSSOP-24 package is suitable for compact designs. The device's low noise ensures accurate measurements in field conditions. The 50/60 Hz rejection mode helps in environments with power line interference.
Recommended
Recommended Products Summary
Engineering reference data for AD7172-2BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7175-2BRUZ | AD7176-2BRUZ | AD7177-2BRUZ | AD7124-4BRUZ | AD7799BRUZ |
|---|---|---|---|---|---|---|
| Package | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP | 24-TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24-bit | 24-bit | 24-bit | 32-bit | 24-bit | 24-bit |
| Max Data Rate | 31.25 kSPS | 250 kSPS | 250 kSPS | 10 kSPS | 19.2 kSPS | 470 SPS |
| Input Channels | 2 Diff/4 SE | 2 Diff/4 SE | 2 Diff/4 SE | 2 Diff/4 SE | 4 Diff/8 SE | 3 Diff/6 SE |
| Supply Voltage | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.5V to 5.5V | 2.9V to 3.6V | 2.7V to 5.25V |
| Internal Reference | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (2.5V) | Yes (1.17V) |
| Power Consumption | 3.5 mW (typical) | 4.5 mW | 4.5 mW | 6 mW | 1.5 mW | 1.5 mW |
Key Differentiators
- True rail-to-rail input buffers (vs AD7799BRUZ)
- Higher maximum data rate (vs AD7799BRUZ)
- Lower power consumption (vs AD7175-2BRUZ)
Design Notes
The AD7172-2BRUZ operates from a 2.5V to 5.5V supply. Use separate analog and digital supply pins with proper decoupling. Place 0.1uF and 10uF capacitors close to the AVDD and DVDD pins. A low-noise LDO such as the ADP151 is recommended for analog supply to minimize noise.
For optimal performance, use a solid ground plane and separate analog and digital ground areas. Keep the analog input traces short and shielded. Place the reference decoupling capacitors close to the REF+ and REF- pins. Avoid routing digital signals near the analog inputs.
Ensure the reference voltage is stable and low-noise. Use an external reference like the ADR445 for best performance. The internal reference is less accurate. Also, ensure the input signals are within the common-mode range of the buffers. Incorrect reference or input common-mode can cause conversion errors.
Compliance Information
RoHS compliant per Analog Devices product page. Not AEC-Q100 qualified.
