AD7190BRUZ Guide: 24-Bit Sigma-Delta ADC Specs, Pinout, and Drop-In Alternatives

Quick Answers

The AD7190BRUZ is a 24-bit sigma-delta ADC from Analog Devices with an on-chip programmable gain amplifier (PGA), 4-wire SPI interface, and 24-TSSOP surface-mount package. Verified key specs include a 4.8 kSPS maximum output data rate, PGA gains of 1, 8, 64, and 128, RMS noise of 1.5 µV at 4.7 Hz output rate, and two differential or four pseudo-differential input channels. The device is in active lifecycle, with 99,999 units in stock at XAIPART, MOQ 1, and tiered pricing from $13.0909 at 1 unit down to $7.6364 at 1,000+ units as of 2026-08-22.

This pillar guide covers part selection, design-in steps, the verified pinout, drop-in alternatives, market status, and what to watch in 2026 procurement decisions.

Technical Guide: How to Select and Design In the AD7190BRUZ

The AD7190BRUZ belongs to the ADC/DAC category and is architecturally a sigma-delta converter. It includes a low-noise 24-bit modulator with an on-chip low noise gain stage, which lets you connect small-amplitude sensors directly to the analog inputs. The 24-bit resolution and maximum output data rate of 4.8 kSPS suit precision measurement applications such as weigh scales, pressure sensors, temperature measurement, and strain gauge transducers.

Key specifications to check before you design

• Resolution: 24 Bit
• Architecture: Sigma-Delta
• Channels: 2 Differential or 4 Pseudo-Differential
• Data interface: SPI
• Max output data rate: 4.8 kSPS
• PGA gain: 1, 8, 64, 128
• RMS noise: 1.5 µV at 4.7 Hz output rate
• Reference type: External
• Analog supply: 4.7 V to 5.25 V
• Digital supply: 2.7 V to 5.25 V
• Operating temperature range: -40°C to +105°C
• Package: 24-TSSOP, surface mount, RoHS compliant

Because the reference type is external, choose a precision reference that can drive REFIN1(+)/REFIN1(-) with low noise. The SPI interface gives you register control for gain, filter, clock, and channel selection, and the internal clock removes the need for an external master clock in most designs.

Design-in steps

1. Confirm the analog supply (4.7 V to 5.25 V) and digital supply (2.7 V to 5.25 V) rails are clean and within range.
2. Connect the external reference to REFIN1(+)/REFIN1(-) and decouple it close to the ADC.
3. Wire the 4-wire SPI bus: SCLK, DIN, DOUT/RDY, and CS.
4. Select either two differential inputs or four pseudo-differential inputs to match the sensor topology.
5. Program the PGA gain to 1, 8, 64, or 128 based on the sensor full-scale output.
6. For sensor-fault detection, use the on-chip burnout current source and reference detect function.
7. For portable equipment, use power-down mode between conversions to reduce current consumption.

Pin usage for a typical bridge-sensor interface

The key functional pins for a bridge-sensor design are SCLK (pin 1), DIN (pin 2), DOUT/RDY (pin 3), CS (pin 4), REFIN1(+) (pin 8), REFIN1(-) (pin 9), AIN1(+) (pin 10), AIN1(-) (pin 11), AVDD (pins 6 and 7), DVDD (pin 19), DGND (pin 20), and AGND (pins 21 and 22). Use the device datasheet for the complete pin function table.

Alternatives & Comparison: Drop-In Replacements for AD7190BRUZ

The XAIPART database lists four verified comparison parts. The closest drop-in is the AD7192BRUZ, which shares the 24-TSSOP package and pinout but has higher noise. The AD7190WBRUZ-RL is the automotive-grade version with the same die and package. The AD7172-2BRUZ and ADS1256IDBR target higher-speed applications but require hardware or software changes.

Cells marked "Not specified" mean no verified value for that parameter was included in the XAIPART comparison data; they do not imply the part lacks the feature. For exact register maps and electrical specifications, consult each manufacturer datasheet.

Industry Insight: Market Position, Lifecycle, and Supply Situation

The AD7190BRUZ is an active product in the XAIPART database, and current inventory is 99,999 units with a minimum order quantity of 1. The tiered pricing as of 2026-08-22 is $13.0909 at 1 unit, $9.4545 at 10 units, $8.3636 at 100 units, $8.00 at 500 units, and $7.6364 at 1,000+ units. Deep stock and MOQ 1 make the part practical for both engineering samples and production runs.

The verified application set covers weigh scales, pressure measurement, temperature measurement, strain gauge transducers, industrial process control, and portable instrumentation. The 24-TSSOP package supports compact designs, while the wide operating temperature range (-40°C to +105°C) supports industrial environments. The automotive-grade variant AD7190WBRUZ-RL is also listed in the database, giving automotive and harsh-environment programs a same-die option.

Trends & Outlook: What Buyers Should Watch

For 2026, the AD7190BRUZ remains a strong baseline for low-noise precision measurement. Buyers should watch three things:

• Noise requirements: The verified 1.5 µV RMS noise at 4.7 Hz output rate is the reason to choose this part. If your application can tolerate higher noise, the lower-cost AD7192BRUZ may be sufficient.
• Speed upgrades: If your system needs faster update rates, the AD7172-2BRUZ (31.25 kSPS) or ADS1256IDBR (30 kSPS) are listed as alternatives, but they are not pin-compatible with the AD7190BRUZ.
• Qualified grades: For automotive or harsh-environment needs, the AD7190WBRUZ-RL offers automotive grade with the same die and package.

The XAIPART listing shows active lifecycle and 99,999 units in stock, so procurement teams can design in the AD7190BRUZ now without an end-of-life flag in the database. For ordering, see the AD7190BRUZ product page, browse the XAIPART ADC/DAC category, or review the sigma-delta ADC selection guide.