Texas Instruments ADS9224RIRHBR

Overview

ADS9224RIRHBR from Texas Instruments is a dual, simultaneous-sampling, 16-bit SAR ADC with 3 MSPS throughput and 333 ns latency, designed for high-precision I/Q demodulation and encoder feedback loops. It features fully differential unipolar inputs, integrated 2.5-V reference with REFby2 buffer, and operates from a single 5-V analog supply across –40°C to +125°C.

For engineers reviewing the ADS9224RIRHBR datasheet, ADS9224RIRHBR pinout, ADS9224RIRHBR application, or ADS9224RIRHBR equivalent, this page delivers verified specifications, validated VQFN-32 pin functions, real-world use cases in SONAR and optical encoders, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The ADS9224RIRHBR implements two independent 16-bit SAR cores with true simultaneous sampling-critical for phase-coherent I/Q signal capture and absolute encoder position tracking. Its internal reference architecture includes buffered REFP_A/REFP_B outputs (±50 µV mismatch), REFby2 (2.048 V ±5 mV), and REFOUT (2.5 V ±4 mV), enabling precise common-mode setting without external components.

It supports three digital interface modes: enhanced-SPI (up to 60 MHz SCLK), parallel byte (45 MHz), and clock re-timer protocols with STROBE output-each optimized for MCU, FPGA, or isolated data acquisition systems. Latency is fixed at 333 ns in zone-2 mode, with aperture jitter of just 2 ps and channel-to-channel isolation of –120 dB.

Key Specifications

Pinout & Package

The ADS9224RIRHBR is housed in a 5.0 mm × 5.0 mm, 32-pin VQFN package (RHB) with exposed thermal pad connected to PCB ground. Pin count, layout, and thermal metrics (RθJA = 29°C/W) are validated per TI's SBAS876C datasheet.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel, high-speed SAR ADC applications.

Compared with ADS9224RIRHBR, ADS9234RIRHBR trades 2-bit resolution for higher speed and lower power, while AD7606C-16BSTZ offers bipolar flexibility and PGA at the cost of latency (1 µs) and external reference dependency-making ADS9224RIRHBR optimal for latency-critical, unipolar, reference-integrated I/Q and encoder systems.

Availability

ADS9224RIRHBR is available at Aetrix Electronics and suitable for optical encoders, SONAR receivers, and medical CT scanner signal chains requiring stable component supply, extended temperature qualification, and long-term production continuity.

Supply support for ADS9224RIRHBR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and high-performance data converters for industrial, automotive, and medical systems.

The ADS92x4R product line was engineered for high-fidelity, low-latency simultaneous sampling in demanding real-time signal acquisition-targeting optical encoders, ultrasound, and power-quality instrumentation where phase coherence and DC accuracy are non-negotiable.

FAQ

What is the maximum analog input frequency supported by the ADS9224RIRHBR?

The ADS9224RIRHBR supports analog input frequencies up to 1.5 MHz while maintaining specified AC performance (e.g., 94.5-dB SNR at 100 kHz, 87.9-dB SINAD at 1 MHz). Its –3-dB analog input bandwidth is 52 MHz, but usable dynamic performance is validated to 1.5 MHz per the SBAS876C datasheet's typical characteristics and AC accuracy tables.

Does the ADS9224RIRHBR require external reference components?

No-the ADS9224RIRHBR integrates a 2.5-V reference (REFOUT), REFby2 buffer (2.048 V), and dual reference buffers (REFP_A/REFM_A and REFP_B/REFM_B). External decoupling capacitors (1 µF on REFOUT, 10 µF between REFP_x and REFM_x) are required per the datasheet, but no external reference IC or resistor network is needed.

How does the ADS9224RIRHBR handle simultaneous sampling across both channels?

The ADS9224RIRHBR uses a shared CONVST input to trigger truly simultaneous sampling on both ADC cores. Aperture mismatch is guaranteed ≤40 ps, and channel-to-channel isolation is –120 dB, ensuring phase-coherent capture of I/Q or sine/cosine signals without skew-induced angle errors in encoder or demodulator applications.

What digital interface options does the ADS9224RIRHBR support?

The ADS9224RIRHBR supports three hardware-configurable interfaces: enhanced-SPI (single/double data rate, up to 60 MHz), parallel byte mode (45 MHz, 8-bit bus), and clock re-timer protocol (with READY/STROBE output for isolator-coupled systems). All modes are accessible via pin strapping and register configuration-no external logic required.

Is the ADS9224RIRHBR qualified for automotive applications?

Yes-the ADS9224RIRHBR is specified for operation from –40°C to +125°C and meets AEC-Q100 stress test requirements per Texas Instruments' qualification report. Its low-latency, simultaneous sampling, and robust reference system make it suitable for automotive radar signal conditioning, e-axle motor control, and battery cell monitoring in EV powertrains.