AD7190BRUZ-REEL

Analog Devices AD7190BRUZ-REEL — 24-bit, 4.8 kSPS Sigma-Delta ADC with PGA, SPI, and 4 Differential / 8 Single-Ended Inputs

The Analog Devices AD7190BRUZ-REEL is a precision, low-noise, 24-bit sigma-delta (ΔΣ) analog-to-digital converter engineered for high-accuracy measurement systems. With an on-chip programmable gain amplifier (PGA), flexible input multiplexer supporting up to 4 differential or 8 pseudo-differential channels, and an SPI-compatible interface, the AD7190BRUZ-REEL consolidates critical front-end functions to streamline sensitive sensor measurement designs. Delivered in a compact 24-lead TSSOP package and supplied on Tape & Reel for high-volume assembly, this device is a compelling choice for weigh scales, industrial process control, temperature and pressure instrumentation, and general-purpose data acquisition.

The “RU” package code denotes the 24-lead TSSOP (RU-24) footprint, while the “Z” suffix indicates a lead-free, RoHS-compliant variant. The “-REEL” suffix specifies Tape & Reel packaging suitable for automated pick-and-place.

Why engineers and sourcing teams choose the AD7190BRUZ-REEL

• Consolidates precision front-end functions: ΔΣ ADC + on-chip PGA + input MUX
• High-resolution conversion at up to 24 bits and data rates to 4.8 kSPS
• Flexible input configuration for multiple sensors and channels without extra external ICs
• SPI interface simplifies microcontroller and FPGA connectivity
• Space- and cost-efficient 24-TSSOP package with RoHS compliance

Key Features and Benefits

• 24-bit sigma-delta conversion

• High resolution supports low-level sensor signals, enabling precise measurement across a wide dynamic range.

• On-chip programmable gain amplifier (PGA), 1 to 128

• Eliminates or reduces external instrumentation amplifiers for many applications, saving board space and BOM cost while improving matching and reducing potential error sources.

• Integrated input multiplexer

• Up to 4 differential or 8 pseudo-differential inputs lets you share the converter across multiple sensors (e.g., multiple load cells, RTDs, or bridges) and select channels in firmware.

• SPI-compatible serial interface

• Simple digital interface for microcontrollers and FPGAs enables straightforward configuration and data acquisition.

• Up to 4.8 kSPS data rate

• Supports both low-noise, low-bandwidth applications and faster updates for scanning multiple channels or dynamic measurements.

• 24-lead TSSOP, surface-mount

• Compact RU-24 package facilitates dense layouts; -REEL packaging streamlines automated assembly for production runs.

Detailed Specifications

From the provided device data and product references:

• Brand / Manufacturer: Analog Devices
• Series: AD7190
• Category: Analog to Digital Converters (ADCs)
• Architecture: Sigma-Delta (ΔΣ)
• Resolution: 24 bits
• Sampling Rate (Max): 4.8 kSPS
• Channels: 4 Differential / 8 Single-Ended
• Input Type: Differential, Pseudo-Differential
• Programmable Gain: 1 to 128 (on-chip PGA)
• Multiplexer: On-chip
• Interface: SPI
• Package / Case: 24-TSSOP (RU-24)
• Mounting Type: Surface Mount
• Packaging: Tape & Reel (TR)
• Pin Count: 24

Parameters not provided in the available data:

• Supply voltage: Not specified in datasheet
• Operating temperature range: Not specified in datasheet
• Integral nonlinearity (INL) / offset / gain error: Not specified in datasheet
• Input impedance / input buffer details: Not specified in datasheet
• Internal reference / reference options: Not specified in datasheet
• Power consumption / current draw: Not specified in datasheet
• Digital interface timing specifics (SPI modes, max clock): Not specified in datasheet

For any parameters not listed above, consult the official product page and datasheet linked below.

Architecture and Design Insight

The AD7190BRUZ-REEL uses a sigma-delta (ΔΣ) conversion architecture, well-suited to precision measurement tasks where noise performance and resolution are more critical than very high throughput. By oversampling the input and shaping quantization noise out of band, ΔΣ converters typically achieve excellent low-frequency noise characteristics—ideal for slow-changing, sensor-based signals like load cells, RTDs, thermocouples, pressure bridges, and other transducers.

The on-chip PGA with gains from 1 to 128 is a key differentiator. It allows the device to directly interface with low-level sensor outputs without always requiring a separate low-noise instrumentation amplifier. This reduces component count, eases matching concerns between external analog stages, and can simplify calibration strategies. In multi-sensor platforms, the on-chip multiplexer enables firmware-controlled channel selection, which is useful for scanning multiple inputs or switching between calibration and measurement channels.

An SPI-compatible interface provides a familiar, low-pin-count digital connection. Designers can map device registers into their microcontroller or FPGA firmware, implement channel sequencing, configure gain settings, and optimize output data rates for their noise-bandwidth tradeoffs.

Applications

The AD7190BRUZ-REEL is tailored for precision sensing and data acquisition. Typical applications include:

• Weigh scales and load-cell interfaces

• The combination of 24-bit resolution, ΔΣ architecture, and an on-chip PGA makes it well-suited for low-level bridge signals.

• Precision industrial process control

• Multi-channel capability and SPI control help in distributed measurement nodes and PLC/DAQ front ends where accuracy and stability are key.

• Temperature measurement (RTDs, thermocouples)

• Differential and pseudo-differential inputs support common precision temperature sensing topologies. The PGA enhances small-signal readout in ratiometric configurations.

• Pressure and strain measurement

• Bridge-type sensors benefit from high resolution and integrated gain, often reducing the need for an external amplifier.

• General-purpose data acquisition systems

• A versatile platform for slowly varying signals where noise performance and configurability matter more than very high sample rates.

Designers implementing these applications often leverage the device’s channel multiplexer to alternate between multiple sensors and internal calibration routines. The PGA permits gain staging per channel, so each sensor path can be tailored in firmware without changing the hardware design.

Practical Integration Tips

• Input configuration strategy

• Decide early between differential and pseudo-differential input use cases. Differential inputs improve rejection of common-mode noise for long sensor leads and electrically noisy environments.

• Use the on-chip PGA to simplify the analog front end

• Start with a modest gain to validate signal integrity, then increase gain as the noise budget allows. Consolidating gain internally can reduce drift due to board-level component tolerances.

• Channel sequencing and calibration

• When multiplexing sensors, structure firmware to interleave measurements with periodic zero/gain checks. This maintains measurement stability across channels.

• SPI integration

• Define clear configuration routines that set gain, channel selection, and output data rate. Ensure your host controller’s SPI clocking and timing align with the converter’s requirements (refer to the datasheet for exact timing specifications).

• Layout and grounding

• Keep sensor inputs and reference routing short and well-shielded. Segregate analog and digital grounds carefully and minimize digital switching noise near sensitive analog nodes.

• Antialiasing and filtering

• Even with ΔΣ converters, front-end filtering is valuable. Use simple RC networks close to the ADC inputs to attenuate out-of-band noise before conversion.

Note: These are general best practices for precision ΔΣ ADCs. For device-specific limits or constraints, refer to the datasheet.

Lifecycle, Availability, and Sourcing

• Lifecycle Status: Active (per Analog Devices product page)
• Series: AD7190
• Replacements: Not specified
• Package: 24-TSSOP (RU-24)
• Packaging: Tape & Reel (TR)
• Mounting Type: Surface Mount
• Pin Count: 24

Sourcing tips for the AD7190BRUZ-REEL:

• Verify suffix meanings when ordering:
• RU = TSSOP-24 package code
• Z = lead-free, RoHS-compliant variant
• -REEL = Tape & Reel packaging
• Align packaging with your assembly process. For automated SMT lines, -REEL simplifies handling and replenishment.
• Maintain a second-source plan only at the board level. No drop-in replacements are specified, so changes would require redesign or requalification.
• Consult authorized distributors and the Analog Devices product page for real-time availability, lead times, and PCN/PDN notices.

Environmental and Regulatory Compliance

• RoHS: RoHS Compliant; lead-free (Z suffix)
• Additional environmental certifications: Not specified in datasheet

If your program requires documentation beyond RoHS, check the product page or request compliance statements directly from Analog Devices.

Frequently Asked Questions (FAQs)

• What is the resolution of the Analog Devices AD7190BRUZ-REEL?

• 24 bits.

• What is the maximum sampling rate?

• Up to 4.8 kSPS.

• How many input channels are supported?

• Up to 4 differential or 8 pseudo-differential channels through the on-chip multiplexer.

• Does the AD7190BRUZ-REEL include a programmable gain amplifier (PGA)?

• Yes. Programmable gain from 1 to 128 is integrated on chip.

• What interface does it use?

• SPI-compatible serial interface.

• What is the package type and pin count?

• 24-lead TSSOP (RU-24), 24 pins, surface-mount.

• Is the device RoHS compliant?

• Yes, the Z suffix indicates a lead-free, RoHS-compliant variant.

• What does the -REEL suffix mean?

• Tape & Reel packaging for automated assembly.

• Is there an internal reference?

• Not specified in datasheet.

• What is the operating supply voltage range and power consumption?

• Not specified in datasheet.

• What is the operating temperature range?

• Not specified in datasheet.

• Are there specified replacements or pin-compatible alternatives?

• Not specified.

• Is the AD7190BRUZ-REEL currently active?

• Lifecycle status is listed as Active.

Ordering and Part Number Decoding

• MPN: AD7190BRUZ-REEL
• AD7190: Series and core device family
• RU: 24-lead TSSOP package code
• Z: Lead-free (RoHS-compliant) variant
• -REEL: Tape & Reel packaging

Always verify the exact ordering code against your BOM and the Analog Devices product page, especially when matching assembly packaging requirements.

Resources and Documentation

• Product Page: https://www.analog.com/en/products/ad7190.html
• Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/AD7190_7192.pdf

Consult these resources for the most current specifications, timing information, and application guidance. For compliance certificates and any change notifications, use the product page or contact Analog Devices support.

Summary

The Analog Devices AD7190BRUZ-REEL brings together a 24-bit ΔΣ ADC, on-chip PGA, and input multiplexing in a compact 24-TSSOP package with an SPI interface—exactly the features needed to build accurate, multi-channel sensor measurement systems with minimal external circuitry. With support for 4 differential or 8 pseudo-differential channels and programmable gains up to 128, it reduces design complexity and BOM size while enabling flexible, firmware-driven measurement strategies. Its RoHS-compliant, Tape & Reel packaging makes it straightforward to source and scale in production. For any parameters beyond those listed here, reference the official datasheet and product page to complete your design and procurement documentation.