AD7176-2BRUZ - 24-Bit 250kSPS Sigma-Delta ADC | Analog Devices
MPN: AD7176-2BRUZ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $13.43 | $13.43 |
| 10 | $12.5 | $125.00 |
| 100 | $11.2 | $1,120.00 |
| 500 | $10.1 | $5,050.00 |
| 1,000 | $9.5 | $9,500.00 |
AD7176-2BRUZ Overview
A sigma-delta ADC is a type of analog-to-digital converter that uses oversampling and noise shaping to achieve high resolution (typically 16 to 24 bits) with relatively low cost and power. It is widely used in precision measurement, industrial process control, and medical instrumentation where high accuracy and low noise are critical. The AD7176-2 belongs to the Analog Devices precision ADC family, which includes other high-performance converters like the AD7175-2 and AD7177-2, and is positioned as a fast-settling, multiplexed solution for multi-channel systems.
Key features of the AD7176-2BRUZ include a maximum output data rate of 250 kSPS, a 20 µs settling time for full accuracy, and a programmable digital filter with multiple filter options (sinc5 + sinc1, etc.). It offers excellent DC accuracy with an integral nonlinearity (INL) of ±2 ppm of FSR typical, and a noise-free resolution of up to 24 bits at lower data rates. The device also includes a 2.5 V internal reference with 2 ppm/°C drift, a reference buffer, and a temperature sensor. It supports both SPI and QSPI serial interfaces, and includes a GPIO and a crystal oscillator driver.
Technically, the AD7176-2 uses a high-performance sigma-delta modulator with a digital filter that can be configured for various settling times and noise performance. The crosspoint multiplexer allows flexible input routing, enabling the measurement of multiple sensors without external muxing. The device also features a 50 Hz/60 Hz rejection mode for power-line noise suppression, and a burnout current source for sensor fault detection. The internal reference can be bypassed for external reference use, and the device supports both unipolar and bipolar input ranges.
Typical applications include process control, industrial automation, weigh scales, temperature and pressure measurement, and medical instrumentation. The fast settling time makes it suitable for multiplexed systems where multiple channels need to be scanned quickly. The low noise and high accuracy also make it ideal for precision data acquisition in laboratory and test equipment.
When designing with the AD7176-2BRUZ, ensure proper decoupling of the AVDD and DVDD supplies with 10 µF and 0.1 µF capacitors, and use a clean analog ground plane. The reference input should be bypassed with a 10 µF capacitor if using the internal reference. For best performance, keep the analog input traces short and shielded, and avoid routing digital signals near the analog inputs.
Drop-in alternatives for AD7176-2BRUZ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with AD7176-2BRUZ (same form factor and footprint) — differing in Input Type, Interface, Package, Number of Channels, Sampling Rate.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
AD7175-2BRUZ
✅ Drop-In✓ In Stock
$9.62 / Unit
View Datasheet →AD7177-2BRUZ
✅ Drop-In✓ In Stock
$19.84 / Unit
View Datasheet →AD7172-2BRUZ
✅ Drop-In✓ In Stock
$8.64 / Unit
View Datasheet →ADS127L01
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
ADS127L01IPBSR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
AD7176-2BRUZ Maximum Ratings & Electrical Characteristics
| Resolution | 24 Bit |
| Number of Input Channels | 2 Differential or 4 Pseudo-Differential |
| Sampling Rate | 250 kSPS |
| Settling Time | 20 µs |
| Input Type | Differential, Pseudo-Differential |
| Data Interface | SPI, QSPI |
| Reference Type | Internal, External |
| Internal Reference Voltage | 2.5 V |
| Internal Reference Drift | 2 ppm/°C |
| INL (Integral Nonlinearity) | ±2 ppm of FSR typical |
| Analog Supply Voltage | 2.5 V to 5.5 V |
| Digital Supply Voltage | 2.3 V to 5.5 V |
| Operating Temperature Range | -40°C to +105°C |
| Package | 24-Lead TSSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lead-Free | Yes |
AD7176-2BRUZ 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 | AVSS — Analog ground |
| Pin 9 | DVDD — Digital power supply |
| Pin 10 | DGND — Digital ground |
| Pin 11 | SCLK — Serial clock input |
| Pin 12 | DIN — Serial data input |
| Pin 13 | DOUT — Serial data output |
| Pin 14 | CS — Chip select |
| Pin 15 | SYNC — Synchronization input |
| Pin 16 | GPIO — General purpose I/O |
| Pin 17 | XIN — Crystal oscillator input |
| Pin 18 | XOUT — Crystal oscillator output |
| Pin 19 | REFOUT — Reference output |
| Pin 20 | REFOUT- — Reference output negative |
| Pin 21 | AVDD — Analog power supply |
| Pin 22 | AVDD — Analog power supply |
| Pin 23 | AVSS — Analog ground |
| Pin 24 | AVSS — Analog ground |
Typical Applications
AD7176-2BRUZ is suitable for 6 applications: Process Control, Weigh Scales, Temperature Measurement, Pressure Measurement, Medical Instrumentation, Data Acquisition Systems.
Process Control
The AD7176-2BRUZ is ideal for process control applications such as PLC/DCS modules, where it provides 24-bit resolution and 250 kSPS sampling rate. Its fast 20 µs settling time enables rapid multi-channel scanning, and the crosspoint multiplexer allows flexible input routing for temperature and pressure sensors. The internal 2.5 V reference with 2 ppm/°C drift ensures stable measurements over temperature, while the 50 Hz/60 Hz rejection mode suppresses power-line noise. The device operates from 2.5 V to 5.5 V supplies, making it compatible with industrial power rails. Its SPI interface simplifies integration with microcontrollers, and the burnout current source aids sensor fault detection.
Recommended
Weigh Scales
The AD7176-2BRUZ excels in weigh scale applications due to its high resolution (24-bit) and low noise, enabling precise weight measurements. The fast settling time of 20 µs allows quick updates for dynamic weighing, while the internal reference reduces external component count. The device supports both unipolar and bipolar input ranges, accommodating various load cell configurations. Its SPI interface simplifies connection to microcontrollers, and the programmable digital filter can be optimized for noise vs. speed trade-offs. The burnout current source helps detect sensor faults, improving system reliability. The wide operating temperature range (-40°C to +105°C) ensures performance in industrial environments.
Recommended
Temperature Measurement
The AD7176-2BRUZ is well-suited for temperature measurement systems, offering 24-bit resolution and a 20 µs settling time for fast response. It can interface directly with thermocouples, RTDs, and thermistors through its crosspoint multiplexer, which supports 2 differential or 4 pseudo-differential inputs. The internal 2.5 V reference with 2 ppm/°C drift ensures accurate measurements over temperature, and the 50 Hz/60 Hz rejection mode minimizes power-line interference. The device's low noise performance allows precise temperature readings, while the SPI interface enables easy integration with microcontrollers. The burnout current source can detect open or shorted sensors, enhancing system reliability.
Recommended
Pressure Measurement
The AD7176-2BRUZ is ideal for pressure measurement applications, providing 24-bit resolution and a 250 kSPS sampling rate for high-speed data acquisition. Its fast 20 µs settling time enables rapid scanning of multiple pressure sensors, and the crosspoint multiplexer allows flexible input routing. The internal reference with 2 ppm/°C drift ensures stable measurements, while the device's low noise performance is critical for precise pressure readings. The SPI interface simplifies connection to microcontrollers, and the programmable digital filter can be tailored to the application's noise and speed requirements. The wide operating temperature range makes it suitable for industrial pressure transmitters.
Recommended
Medical Instrumentation
The AD7176-2BRUZ is suitable for medical instrumentation such as patient monitoring and diagnostic equipment, where high accuracy and low noise are essential. Its 24-bit resolution and 250 kSPS sampling rate enable precise measurement of physiological signals, while the fast settling time supports multiplexed channels. The internal reference with 2 ppm/°C drift ensures stable performance over temperature, and the device's low power consumption is beneficial for portable devices. The SPI interface allows easy integration with medical-grade microcontrollers, and the burnout current source aids in sensor fault detection. The device operates from 2.5 V to 5.5 V supplies, compatible with battery-powered systems.
Recommended
Data Acquisition Systems
The AD7176-2BRUZ is a key component in data acquisition systems, offering 24-bit resolution and a 250 kSPS sampling rate for high-speed, high-accuracy measurements. Its fast 20 µs settling time enables rapid multi-channel scanning, and the crosspoint multiplexer allows flexible input routing. The internal reference with 2 ppm/°C drift ensures stable measurements, while the device's low noise performance is critical for precision applications. The SPI interface simplifies connection to data acquisition controllers, and the programmable digital filter can be optimized for various signal types. The device operates from 2.5 V to 5.5 V supplies, making it versatile for different system architectures.
Recommended
Recommended Products Summary
Engineering reference data for AD7176-2BRUZ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | AD7175-2BRUZ | AD7177-2BRUZ | AD7172-2BRUZ | ADS127L01 |
|---|---|---|---|---|---|
| Package | 24-Lead TSSOP | 24-Lead TSSOP | 24-Lead TSSOP | 24-Lead TSSOP | 24-Lead TSSOP |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Texas Instruments |
| Resolution | 24 Bit | 24 Bit | 32 Bit | 24 Bit | 24 Bit |
| Max Data Rate | 250 kSPS | 250 kSPS | 10 kSPS | 31.25 kSPS | 400 kSPS |
| Interface | SPI, QSPI | SPI, QSPI | SPI, QSPI | SPI, QSPI | SPI |
Key Differentiators
- Fast settling time of 20 µs (vs AD7172-2BRUZ)
- Higher data rate of 250 kSPS (vs AD7177-2BRUZ)
- Crosspoint multiplexer for flexible input routing (vs ADS127L01)
Design Notes
Decouple AVDD and DVDD with 10 µF and 0.1 µF capacitors placed close to the pins. Use separate analog and digital ground planes to minimize noise coupling. The AD7176-2 operates from 2.5V to 5.5V analog supply and 2.3V to 5.5V digital supply; ensure stable supplies to maintain ADC accuracy.
Keep analog input traces short and shielded, and avoid routing digital signals near the analog inputs. Use a solid ground plane under the ADC. For best performance, place the reference bypass capacitor (10 µF) close to the REF+ and REF- pins. Follow the layout guidelines in the AD7176-2 datasheet (Rev. D).
Do not exceed the absolute maximum ratings for supply voltages. Ensure the reference input is properly bypassed if using the internal reference. The crosspoint multiplexer allows flexible input routing, but be aware of settling time when switching channels. Use the 50 Hz/60 Hz rejection mode for power-line noise suppression in industrial environments.
Compliance Information
RoHS compliant and lead-free per distributor listings. Not AEC-Q100 qualified.
