Part A
AD7175-2BRUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 5632 PCS
- Package
- TSSOP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7175-2BRUZ is a strong functional replacement candidate for the AD7176-2BRUZ, sharing the same TSSOP-24 footprint, 24-bit sigma-delta architecture, and 2-channel differential input configuration. Designers should validate the faster output data rate and reduced settling time of the AD7175-2BRUZ against their system timing requirements before finalizing the substitution.
Resolution and Architecture
High match
Package and Pinout
High match
Input Channel Configuration
High match
Output Data Rate
Validation required
Parts at a glance
Part B
AD7176-2BRUZ
Analog Equipment GmbH.
- Lifecycle
- Active
- Stock
- 2728 PCS
- Package
- TSSOP-24
- Series
- Acquisition de données - Convertisseur analogique - numérique (ADC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD7176-2BRUZ | AD7175-2BRUZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution alone does not distinguish them for substitutability. |
| Number of input channels | 2 differential / 4 single-ended | 2 differential / 4 single-ended | Channel count determines how many sensor inputs can be multiplexed without external switching. |
| Maximum output data rate | 250 kSPS | 250 kSPS | Data rate sets the achievable throughput for high-speed acquisition and affects settling/filter design. |
| RMS noise (at 20 SPS, gain=1) | Approximately 0.9 µV | Approximately 0.9 µV | Noise floor directly impacts effective resolution and low-level signal measurement capability. |
| Integral nonlinearity (INL) | ±2 ppm typical | ±2 ppm typical | INL affects absolute accuracy and linearity of the transfer function across the input range. |
| Supply voltage (analog) | 4.5 V to 5.5 V | 4.5 V to 5.5 V | Analog supply range must match the system rail to avoid level shifting or regulator changes. |
| Interface | SPI (serial) | SPI (serial) | A matching serial interface ensures firmware and host connectivity remain compatible. |
| Package | 24-lead TSSOP | 24-lead TSSOP | Identical package and pinout allow drop-in board replacement without layout changes. |
| Operating temperature range | −40 °C to +105 °C | −40 °C to +105 °C | Temperature range must cover the application environment for reliable operation. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7175-2BRUZ | AD7176-2BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Sampling Rate(Per Second) | 250k | 250k |
| Number of Inputs | 2, 4 | 2, 4 |
| Input Type | Differential, Pseudo-Differential, Single Ended | Differential, Pseudo-Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| Configuration | MUX-ADC | MUX-ADC |
| Number of A/D Converters | 1 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External, Internal | External, Internal |
| Voltage - Supply, Analog | 2V ~ 5.5V | 2V ~ 5.5V |
| Voltage - Supply, Digital | 2V ~ 5.5V | 2V ~ 5.5V |
| Features | Temperature Sensor | - |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
Frequently asked questions
What are the key differences between the AD7176-2BRUZ and AD7175-2BRUZ?
The AD7176-2 is a 24-bit, 250 kSPS sigma-delta ADC with a single differential input pair (or two pseudo-differential inputs), while the AD7175-2 is a 24-bit, 250 kSPS sigma-delta ADC with two fully differential input channels (four pseudo-differential inputs). The AD7175-2 offers higher throughput in multi-channel configurations and includes additional features such as a wider input range and enhanced digital filtering options, whereas the AD7176-2 is optimized for single-channel high-resolution applications.
Are the AD7176-2BRUZ and AD7175-2BRUZ pin-compatible?
Both devices are offered in a 24-lead TSSOP (RU-24) package, but they are not pin-compatible. The pin functions differ, particularly in the analog input and reference connections, so a direct drop-in replacement is not possible without PCB redesign and validation against the respective datasheets.
What is the maximum output data rate for each device?
Both the AD7176-2 and AD7175-2 support a maximum output data rate of 250 kSPS in single-channel mode. In multi-channel configurations, the AD7175-2 maintains high throughput across its two differential channels, while the AD7176-2 is limited to its single differential input pair.
How do the noise and resolution specifications compare?
The AD7176-2 achieves approximately 17.2 noise-free bits at 250 kSPS and up to 21.7 noise-free bits at lower output data rates (e.g., 10 SPS). The AD7175-2 provides similar high-resolution performance, with approximately 17.1 noise-free bits at 250 kSPS and up to 21.7 noise-free bits at reduced rates. Both devices deliver comparable low-noise performance suitable for precision measurement applications.
Do both ADCs include an integrated reference buffer and PGA?
Yes, both the AD7176-2 and AD7175-2 integrate a precision reference buffer and a programmable gain amplifier (PGA) with gains of 1, 2, 4, 8, 16, 32, 64, and 128. This allows direct connection of low-level sensors without external signal conditioning.
What digital interfaces do the AD7176-2BRUZ and AD7175-2BRUZ support?
Both devices feature a SPI-compatible serial interface supporting 3-wire or 4-wire operation, with CRC error checking and a data-ready output. They also include general-purpose digital inputs/outputs (GPIOs) for external control, and support daisy-chaining of multiple devices.
Which device is better suited for multi-channel applications?
The AD7175-2BRUZ is better suited for multi-channel applications because it provides two fully differential input channels (or four pseudo-differential inputs) with fast channel switching and settling, whereas the AD7176-2BRUZ offers only a single differential input pair and is optimized for single-channel precision measurements.
What are the power supply requirements for these ADCs?
Both the AD7176-2 and AD7175-2 operate from an analog supply (AVDD) of 4.5 V to 5.5 V and a digital supply (DVDD) of 2.5 V to 5.5 V. They also require an IOVDD supply of 2.5 V to 5.5 V for the digital interface, and both feature low power consumption suitable for portable instrumentation.