AD7172-2BRUZ-RL7 - 24-Bit Sigma-Delta ADC | Analog Devices
MPN: AD7172-2BRUZ-RL7 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $20.46 | $20.46 |
| 10 | $18.41 | $184.10 |
| 100 | $16.37 | $1,637.00 |
| 500 | $14.32 | $7,160.00 |
| 1,000 | $12.28 | $12,280.00 |
Drop-in alternatives for AD7172-2BRUZ-RL7 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:
AD7172-2BRUZ
β Drop-Inπ Reference alternative (not in catalog)
AD7172-2BRUZ-RL
β Drop-Inπ Reference alternative (not in catalog)
AD7175-2BRUZ-RL7
β Drop-Inβ In Stock
$13.1 / Unit
View Datasheet βAD7176-2BRUZ
β Drop-Inβ In Stock
$9.5 / Unit
View Datasheet βAD7172-2BRUZ-RL7 Maximum Ratings & Electrical Characteristics
| Resolution | 24 bit |
| Number of Channels | 2 differential / 4 single-ended |
| Output Data Rate | 31.25 kSPS (max) |
| Input Type | Differential / Single-ended |
| Interface | SPI |
| Supply Voltage | 3 V to 5.5 V |
| Operating Temperature Range | -40Β°C to +105Β°C |
| Package | TSSOP-24 |
| Mounting Type | Surface Mount |
| Internal Reference | 2 ppm/Β°C |
| Internal Oscillator | Yes |
| Input Buffers | True rail-to-rail |
| Programmable Gain | 1 to 128 |
| RoHS Status | Compliant |
| MSL Level | 3 (168 hours) |
AD7172-2BRUZ-RL7 Pin Configuration
| Pin 1 | AVDD β Analog power supply |
| Pin 2 | AIN0 β Analog input 0 |
| Pin 3 | AIN1 β Analog input 1 |
| Pin 4 | AIN2 β Analog input 2 |
| Pin 5 | AIN3 β Analog input 3 |
| Pin 6 | REF+ β Positive reference input |
| Pin 7 | REF- β Negative reference input |
| Pin 8 | AVSS β Analog ground |
| Pin 9 | DVDD β Digital power supply |
| Pin 10 | DGND β Digital ground |
| Pin 11 | SCLK β Serial clock input |
| Pin 12 | DIN β Serial data input |
| Pin 13 | DOUT/RDY β Serial data output / ready |
| Pin 14 | CS β Chip select |
| Pin 15 | SYNC β Synchronization input |
| Pin 16 | GPIO0 β General purpose I/O |
| Pin 17 | GPIO1 β General purpose I/O |
| Pin 18 | GPIO2 β General purpose I/O |
| Pin 19 | GPIO3 β General purpose I/O |
| Pin 20 | RESET β Reset input |
| Pin 21 | PDWN β Power down input |
| Pin 22 | CLK β External clock input |
| Pin 23 | AVDD β Analog power supply |
| Pin 24 | AVSS β Analog 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-RL7 is suitable for 6 applications: Industrial Process Control, Temperature Measurement, Weigh Scales, Precision Instrumentation, Medical Monitoring, Data Acquisition Systems.
Industrial Process Control
The AD7172-2BRUZ-RL7 is ideal for industrial process control due to its 24-bit resolution and 31.25 kSPS data rate, enabling precise measurement of temperature, pressure, and flow. Its integrated input buffers simplify interfacing with sensors, and the SPI interface allows easy integration with microcontrollers. The device operates over -40Β°C to +105Β°C, suitable for harsh industrial environments. Its low power consumption is beneficial for field transmitters and remote monitoring systems.
Recommended
Temperature Measurement
The AD7172-2BRUZ-RL7 excels in temperature measurement applications, offering 24-bit resolution to detect minute temperature changes. Its programmable gain amplifier (PGA) allows direct connection to thermocouples and RTDs without additional amplification. The internal 2 ppm/Β°C reference ensures stable measurements over temperature. The device's low noise performance is critical for accurate temperature readings in laboratory and industrial settings. The SPI interface enables straightforward data retrieval for closed-loop control systems.
Recommended
Weigh Scales
The AD7172-2BRUZ-RL7 is well-suited for weigh scale applications, providing 24-bit resolution and a maximum data rate of 31.25 kSPS to capture fast weight changes. Its integrated PGA with gains up to 128 allows direct connection to load cells, eliminating the need for external amplification. The device's low noise and high linearity ensure accurate weight measurements. The SPI interface simplifies calibration and data readout. Its low power consumption is advantageous for battery-powered scales.
Recommended
Precision Instrumentation
The AD7172-2BRUZ-RL7 is a key component in precision instrumentation, such as data acquisition systems and benchtop multimeters. Its 24-bit resolution and low noise enable accurate measurement of small signals. The device's true rail-to-rail input buffers allow high-impedance inputs without external buffer amplifiers. The SPI interface supports high-speed data transfer to host processors. The device's wide supply voltage range (3V to 5.5V) provides flexibility in system design. Its compact TSSOP-24 package is ideal for space-constrained instruments.
Recommended
Medical Monitoring
The AD7172-2BRUZ-RL7 is suitable for medical monitoring devices, such as patient vital sign monitors and diagnostic equipment. Its 24-bit resolution and low power consumption are essential for battery-operated portable devices. The device's integrated buffers and PGA simplify sensor interfacing for ECG, EEG, and temperature probes. The SPI interface allows seamless integration with medical-grade microcontrollers. The device operates over -40Β°C to +105Β°C, covering clinical temperature ranges. Its small footprint is beneficial for wearable and handheld devices.
Recommended
Data Acquisition Systems
The AD7172-2BRUZ-RL7 is a core component in data acquisition systems (DAQ) for capturing analog signals from multiple sensors. Its 2 differential or 4 single-ended inputs allow multiplexing of various signal types. The device's 24-bit resolution and 31.25 kSPS data rate provide high-fidelity signal capture. The SPI interface enables easy connection to DAQ controllers. The device's low noise and high linearity ensure accurate data for analysis. Its wide operating temperature range makes it suitable for both laboratory and field DAQ systems.
Recommended
Recommended Products Summary
Engineering reference data for AD7172-2BRUZ-RL7 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7172-2BRUZ | AD7172-2BRUZ-RL | AD7175-2BRUZ-RL7 | AD7176-2BRUZ |
|---|---|---|---|---|---|
| Package | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 | TSSOP-24 |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Resolution | 24 bit | 24 bit | 24 bit | 24 bit | 24 bit |
| Max Data Rate | 31.25 kSPS | 31.25 kSPS | 31.25 kSPS | 250 kSPS | 250 kSPS |
| Input Channels | 2 Diff / 4 SE | 2 Diff / 4 SE | 2 Diff / 4 SE | 2 Diff / 4 SE | 2 Diff / 4 SE |
| Supply Voltage | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V | 3V to 5.5V |
| Interface | SPI | SPI | SPI | SPI | SPI |
| Operating Temperature | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C | -40Β°C to +105Β°C |
Key Differentiators
- Lower power consumption compared to AD7175-2 (vs AD7175-2BRUZ-RL7)
- Integrated true rail-to-rail input buffers (vs ADS1256IDB)
- Pin-compatible with higher-speed AD7175-2 (vs AD7175-2BRUZ-RL7)
Design Notes
Provide a clean, low-noise power supply for AVDD and DVDD. Use separate analog and digital supply pins with appropriate decoupling capacitors (e.g., 10uF and 0.1uF) placed close to the pins. A low-dropout regulator (LDO) can be used to reduce supply noise. The AD7172-2 operates from 3V to 5.5V, so ensure the supply is within this range.
For optimal performance, use a solid ground plane and separate analog and digital ground planes, connecting them at a single point. Place the ADC close to the sensor to minimize trace length. Use guard rings around analog inputs to reduce leakage currents. Follow the layout guidelines in the datasheet (Rev. A) for best results.
Ensure the reference voltage is stable and low-noise. The datasheet recommends using ADR445, ADR444, or ADR441 references. Avoid routing digital signals near analog inputs to prevent coupling. Also, ensure the SPI lines are properly terminated and not too long to avoid signal integrity issues.
Compliance Information
RoHS3 compliant and REACH unaffected per PartGenie. MSL 3 (168 hours).
