Part A
AD7192BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 5707 PCS
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7192BRUZ is a functionally compatible replacement candidate for the AD7190BRUZ, sharing the same 24-bit sigma-delta architecture, TSSOP-24 package, and SPI interface, with the primary distinction being a higher output data rate on the AD7192. Designers should validate the increased output data rate and its impact on filter settling and noise performance within the target application before substituting.
Resolution and Architecture
High match
Package and Pinout
High match
Output Data Rate
Validation required
Digital Interface
High match
Parts at a glance
Part B
AD7190BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3979 PCS
- Package
- TSSOP-24
- Series
- Acquisição de dados - Analogo para Convertedores Digitais (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 | AD7190BRUZ | AD7192BRUZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution is identical and not a differentiator for substitutability. |
| Maximum Output Data Rate | 4.8 kSPS | 4.8 kSPS | Identical maximum throughput means both can serve similar sampling-speed applications. |
| Number of Input Channels (differential) | 2 | 2 | Same channel count allows equivalent sensor interfacing flexibility. |
| PGA Gain Range | 1 to 128 | 1 to 128 | Identical programmable gain ranges support the same small-signal amplification needs. |
| RMS Noise (at 4.7 Hz, gain=128) | 8.5 nV | 11 nV | Lower noise in the AD7190 gives better precision for low-level signal measurement, a key differentiator. |
| Supply Voltage (analog) | 4.75 V to 5.25 V | 4.75 V to 5.25 V | Same analog supply range means identical power-rail requirements. |
| Interface | SPI | SPI | Both use SPI, so the same digital host interface and firmware can be reused. |
| Package | 24-Lead TSSOP | 24-Lead TSSOP | Identical package and pinout enable drop-in board replacement. |
| Operating Temperature Range | -40°C to +105°C | -40°C to +105°C | Same temperature range supports equivalent industrial operating environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7192BRUZ | AD7190BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Base Product Number | AD7192 | - |
| Number of Bits | 24 | 24 |
| Number of Inputs | 2, 4 | 2, 4 |
| Input Type | Differential, Pseudo-Differential | Differential, Pseudo-Differential |
| Data Interface | SPI, DSP | SPI, DSP |
| 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 | 5V |
| 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 AD7190BRUZ and AD7192BRUZ?
Both are 24-bit sigma-delta ADCs in a 24-lead TSSOP package from Analog Devices. The AD7190BRUZ offers a programmable output data rate from 4.7 Hz to 4.8 kHz and an RMS noise of 8.5 nV at 4.7 Hz (gain = 128). The AD7192BRUZ provides a programmable output data rate from 4.7 Hz to 4.8 kHz with an RMS noise of 11 nV at 4.7 Hz (gain = 128). The AD7190 delivers lower noise and higher effective resolution, while the AD7192 is specified with slightly higher noise but similar architecture and functionality.
Are the AD7190BRUZ and AD7192BRUZ pin-compatible?
Yes. Both devices are offered in the same 24-lead TSSOP (RU-24) package and share a common pinout, including the analog inputs, reference inputs, serial interface, and power supply pins. This allows a common PCB footprint, but firmware and performance differences must still be validated before substitution.
What is the maximum output data rate for each device?
Both the AD7190BRUZ and AD7192BRUZ support a maximum output data rate of 4.8 kHz in chop-disabled mode. The minimum programmable output data rate is 4.7 Hz for both parts.
How do the noise specifications compare between the AD7190BRUZ and AD7192BRUZ?
At an output data rate of 4.7 Hz and gain of 128, the AD7190BRUZ specifies 8.5 nV RMS noise, while the AD7192BRUZ specifies 11 nV RMS noise. The AD7190 therefore provides lower noise and correspondingly higher effective resolution for low-frequency, high-precision measurements.
Do both devices include a PGA and what gain range is supported?
Yes. Both the AD7190BRUZ and AD7192BRUZ integrate a programmable gain amplifier (PGA) supporting gain settings of 1, 8, 32, 64, and 128. This allows direct interfacing with low-level sensor signals without external amplification.
What are the supply voltage and current consumption specifications for these ADCs?
Both devices operate from an analog supply (AVDD) of 4.75 V to 5.25 V and a digital supply (DVDD) of 2.7 V to 5.25 V. Typical supply current is approximately 4.5 mA for the AD7190BRUZ and 4.5 mA for the AD7192BRUZ at AVDD = 5 V, with both parts offering power-down modes to reduce consumption when not converting.
Can the AD7192BRUZ be used as a drop-in replacement for the AD7190BRUZ in an existing design?
Because the two parts are pin-compatible and share the same package and interface, the AD7192BRUZ can physically replace the AD7190BRUZ on the same PCB. However, the AD7192 has higher noise (11 nV vs 8.5 nV RMS at 4.7 Hz, gain = 128), so the system noise performance and effective resolution must be re-validated against the application requirements before substitution.
What serial interface do the AD7190BRUZ and AD7192BRUZ use?
Both devices provide a SPI-compatible serial interface supporting 3-wire or 4-wire operation, with a serial clock (SCLK) capable of operating up to 5 MHz. The interface includes a data-ready (RDY) output and supports daisy-chaining of multiple devices.