Part A
AD7190BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3979 Stückzahl
- Package
- TSSOP-24
- Series
- Datenerfassung mit Analog to Digital Converters (ADC)
Replacement verdict
Compatible functional replacement candidate
The AD7193BRUZ and AD7190BRUZ share the same TSSOP-28 footprint, 24-bit sigma-delta architecture, and SPI interface, making the AD7193BRUZ a viable functional replacement candidate for the AD7190BRUZ in many precision measurement designs. Designers should validate the higher output data rate and expanded input channel configuration against their specific application requirements before substitution.
Package Type
High match
Resolution
High match
Interface Type
High match
Output Data Rate
Validation required
Parts at a glance
Part B
AD7193BRUZ
Analog Devices Inc.
- Lifecycle
- Active
- Stock
- 3858 Stückzahl
- Package
- TSSOP-28
- Series
- Datenerfassung mit 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 | AD7193BRUZ | AD7190BRUZ | Why it matters |
|---|---|---|---|
| Resolution (bits) | 24 | 24 | Both are 24-bit sigma-delta ADCs, so resolution alone does not differentiate them for substitutability. |
| Number of input channels | 4 differential / 8 pseudo-differential | 2 differential / 4 pseudo-differential | The AD7193 offers twice the channel count, which is critical if the application needs to multiplex multiple sensors. |
| Maximum output data rate | 4.8 kSPS | 4.8 kSPS | Identical maximum throughput means both can handle the same sampling speed requirements. |
| RMS noise (at 4.7 SPS, gain=128) | 11 nV | 8.5 nV | The AD7190 provides lower noise, which improves precision in low-level signal measurements such as weigh scales. |
| Integral nonlinearity (INL) | ±2 ppm | ±2 ppm | Matching INL specifications indicate comparable linearity performance for both converters. |
| PGA gain range | 1 to 128 | 1 to 128 | Identical programmable gain ranges allow both to interface with the same low-level sensor signals. |
| Supply voltage (AVDD) | 3.0 V to 5.25 V | 3.0 V to 5.25 V | Same analog supply range means both fit the same power rail design without modification. |
| Package | 28-lead TSSOP | 24-lead TSSOP | Different package footprints and pin counts mean the PCB layout must be redesigned if substituting one for the other. |
| Interface | SPI | SPI | Both use a standard SPI interface, so the same microcontroller communication code can be reused. |
| Operating temperature range | -40 °C to +105 °C | -40 °C to +105 °C | Identical temperature ratings ensure both are suitable for the same industrial environments. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD7190BRUZ | AD7193BRUZ |
|---|---|---|
| Part Status | Active | Active |
| Number of Bits | 24 | 24 |
| Number of Inputs | 2, 4 | 4, 8 |
| 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 | 1 |
| Architecture | Sigma-Delta | Sigma-Delta |
| Reference Type | External | External |
| Voltage - Supply, Analog | 5V | 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 |
Frequently asked questions
What are the primary differences between the AD7193BRUZ and AD7190BRUZ?
The AD7193BRUZ is a 4-channel, 24-bit sigma-delta ADC, while the AD7190BRUZ is a 2-channel, 24-bit sigma-delta ADC. Both share the same TSSOP-24 package and similar core architecture, but the AD7193 provides two additional differential input channels (four differential/ eight pseudo-differential inputs versus two differential/ four pseudo-differential inputs on the AD7190).
Are the AD7193BRUZ and AD7190BRUZ pin-compatible?
No. Although both devices are offered in a 24-lead TSSOP package, the pin assignments differ because the AD7193 exposes additional analog input pins (AIN3/AIN4) that are not present on the AD7190. A direct drop-in replacement on an existing PCB is therefore not possible without layout changes.
Do both ADCs offer the same output data rate range?
Yes. Both the AD7193BRUZ and AD7190BRUZ provide programmable output data rates from 4.7 Hz to 4.8 kHz, allowing the same trade-off between resolution and speed to be configured through the on-chip registers.
Do both parts include a PGA and internal oscillator?
Yes. Both devices integrate a low-noise programmable gain amplifier (PGA) with gain settings from 1 to 128 and an on-chip oscillator, reducing external component count for precision sensor and bridge measurement applications.
What is the RMS noise performance of these ADCs?
Both the AD7193BRUZ and AD7190BRUZ achieve approximately 11 nV RMS noise at a gain of 128 and an output data rate of 4.7 Hz, making them suitable for high-resolution, low-level signal acquisition such as weigh scales and pressure sensors.
Can the AD7190BRUZ be used as a substitute for the AD7193BRUZ in an existing design?
Only if the design does not require the extra input channels of the AD7193 and the PCB is redesigned to accommodate the different pinout. The AD7190 cannot be dropped directly into an AD7193 socket, and firmware register maps should be validated against the respective datasheets before substitution.
Do both devices support the same digital interface?
Yes. Both the AD7193BRUZ and AD7190BRUZ provide an SPI-compatible serial interface supporting both 3-wire and 4-wire configurations, along with a status register, mode register, and configuration register for setup and data readback.