Part A
AD7192BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5707 PCS
- Series
- Data Acquisition - Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7192BRUZ is a higher-performance superset of the AD7191BRUZ, sharing the same 24-bit sigma-delta architecture, TSSOP-24 footprint, and SPI interface while adding programmable gain, higher output data rate, and expanded channel configuration. It can serve as a functional replacement in most designs, though firmware configuration and gain-stage validation are required before production release.
Package and Pinout
High match
Resolution and Architecture
High match
Output Data Rate
Validation required
Gain and Channel Configuration
Validation required
Parts at a glance
Part B
AD7191BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 4961 PCS
- Package
- TSSOP-24
- Series
- Data Acquisition - Analog to Digital Converters (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 | AD7191BRUZ | AD7192BRUZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution is equivalent for high-precision measurement applications. |
| Number of input channels | 2 differential | 2 differential / 4 pseudo-differential | The AD7192 offers more flexible input configurations, allowing either two differential or four pseudo-differential inputs, which affects system design flexibility. |
| Maximum output data rate | 4.7 SPS to 4.8 kSPS | 4.7 SPS to 4.8 kSPS | Identical output data rate range means both can serve similar sampling speed requirements. |
| PGA gain range | 1 to 128 | 1 to 128 | Both provide programmable gain from 1 to 128, enabling direct interfacing with low-level sensors without external amplification. |
| Internal reference | Yes (2.5 V) | Yes (2.5 V) | Both include an on-chip 2.5 V reference, reducing external component count and board space. |
| Supply voltage (analog) | 3.0 V to 5.25 V | 3.0 V to 5.25 V | Identical analog supply range allows both to operate from the same power rails in a given design. |
| Interface | SPI (3-wire) | SPI (3-wire) | Both use a standard 3-wire SPI interface, so firmware and host connectivity are largely interchangeable. |
| Package | 24-lead TSSOP | 24-lead TSSOP | Same package and pin count simplify PCB layout substitution between the two parts. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +105 °C | Identical temperature range ensures both are suitable for the same industrial environments. |
| Power consumption (typical) | ~4.5 mW | ~4.5 mW | Comparable low power consumption makes both suitable for battery-powered or low-power instrumentation. |
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 | AD7192BRUZ | AD7191BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AD7192 | - |
| Number of Bits | 24 | 24 |
| Number of Inputs | 2, 4 | 2 |
| Input Type | Differential, Pseudo-Differential | Differential |
| Data Interface | SPI, DSP | SPI |
| Configuration | MUX-PGA-ADC | MUX-PGA-ADC |
| Number of A / D Converters | 1 | - |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 3V ~ 5.25V | 3V ~ 5.25V |
| Voltage - Supply, Digital | 2.7V ~ 5.25V | 2.7V ~ 5.25V |
| Features | PGA | PGA |
| Operating Temperature | -40°C ~ 105°C | -40°C ~ 105°C |
| Mounting Type | Surface Mount | - |
| Packaging | Tube | - |
| Number of A/D Converters | - | 1 |
Frequently asked questions
What are the primary differences between the AD7191BRUZ and AD7192BRUZ?
The AD7191BRUZ is a pin-programmable, 24-bit sigma-delta ADC with a fixed output data rate and gain configuration set by external pins, while the AD7192BRUZ is a 24-bit sigma-delta ADC with a SPI-compatible serial interface that allows programmable output data rates, gain, and filter settings. The AD7192BRUZ offers more configuration flexibility, whereas the AD7191BRUZ provides a simpler, hardware-configured solution.
Do the AD7191BRUZ and AD7192BRUZ share the same package and pinout?
Both devices are offered in a 24-lead TSSOP (RU-24) package, but their pin functions differ because the AD7191BRUZ uses pin-strap configuration while the AD7192BRUZ uses a SPI interface. They are not pin-for-pin drop-in replacements, and the PCB layout must be designed for the specific device.
What is the resolution and architecture of both ADCs?
Both the AD7191BRUZ and AD7192BRUZ are 24-bit sigma-delta (Σ-Δ) analog-to-digital converters, providing high resolution for low-frequency, precision measurement applications such as weigh scales, pressure sensors, and temperature measurement.
How does the digital interface differ between the two parts?
The AD7191BRUZ is configured through pin strapping and does not require a SPI interface for setup, simplifying system design. The AD7192BRUZ provides a SPI-compatible serial interface that allows readback of conversion data and on-chip register configuration, enabling programmable gain, output data rate, and filter settings.
Can the AD7191BRUZ and AD7192BRUZ be used interchangeably in an existing design?
No. Because the AD7191BRUZ is pin-programmable and the AD7192BRUZ is register-programmable via SPI, their pin functions and configuration methods differ. A direct substitution is not possible without redesigning the digital interface and configuration circuitry, and all differences must be validated against the respective manufacturer datasheets.
Are both devices suitable for precision weigh-scale applications?
Yes. Both the AD7191BRUZ and AD7192BRUZ are 24-bit sigma-delta ADCs intended for high-resolution, low-noise measurement, making them suitable for weigh-scale and other precision sensor applications. The AD7192BRUZ offers programmable gain and filter settings that can be tuned for specific load-cell characteristics, while the AD7191BRUZ provides a fixed hardware-configured setup.
What supply voltage do the AD7191BRUZ and AD7192BRUZ require?
Both devices operate from a single analog supply in the range of 2.7 V to 5.25 V, with a separate digital supply, consistent with the AD719x family specifications. Designers should confirm exact supply and reference requirements in the respective manufacturer datasheets before finalizing the power design.