Texas Instruments ADS9226IRHBT

Overview

ADS9226IRHBT from Texas Instruments is a 16-bit, dual-channel, simultaneous-sampling SAR ADC with 2.048 MSPS throughput, 488 ns latency, and pseudo-differential unipolar inputs. It integrates reference buffers, supports 4 V–5.5 V analog supply, and operates across –40°C to +125°C - enabling high-precision current/voltage sensing in servo drive power-stage modules.

For engineers reviewing the ADS9226IRHBT datasheet, ADS9226IRHBT pinout, ADS9226IRHBT application, or ADS9226IRHBT equivalent, key selection criteria include simultaneous sampling integrity, low-latency deterministic timing for closed-loop control, SNR/THD performance at 100 kHz input, and VQFN-32 thermal management in space-constrained industrial systems.

Technical Context

The ADS9226IRHBT implements two independent SAR conversion cores sharing a common reference buffer architecture, each sampling AINP_x/AINM_x pairs with internal 16-pF sampling capacitance and 120-Ω switch resistance. Conversion is triggered by CS rising edge, using an internal clock - eliminating external clock dependency while maintaining strict tCYCLE = 488 ns timing.

Its enhanced-SPI interface delivers left-justified 16-bit output split across four SDO lines (SDO-0A/1A/0B/1B), supporting latency-0 or latency-1 data capture modes. Reference buffering ensures stable REFP_A/REFP_B outputs despite switching charge demands, requiring 10-µF decoupling per REFP/REFM pair per TI layout guidance.

Key Specifications

Pinout & Package

VQFN-32 package (5.00 mm × 5.00 mm) with exposed thermal pad; RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7606C-16BSTZ and ADS8688IPWR, the ADS9226IRHBT uniquely combines 2.048 MSPS dual-channel simultaneous sampling, 488 ns latency, and integrated reference buffers in a 5-mm QFN - making it the only option for space-constrained, high-bandwidth industrial servo and optical module telemetry.

Availability

ADS9226IRHBT is available at Aetrix Electronics and suitable for servo drive position feedback, telecom optical module telemetry, and power quality analyzer designs requiring stable component supply, extended temperature operation, and high-volume production continuity.

Supply support for ADS9226IRHBT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.

The ADS9226IRHBT belongs to TI's high-speed precision SAR ADC product line, engineered specifically for deterministic real-time control systems where simultaneous sampling, nanosecond latency, and DC/AC accuracy must coexist in harsh thermal environments.

FAQ

What is the maximum sampling rate supported by the ADS9226IRHBT?

The ADS9226IRHBT supports a maximum sampling rate of 2.048 MSPS, achieved with latency-1 data capture mode. At this rate, the device maintains full 16-bit resolution, ±2.75 LSB INL, and 90.8 dB SNR. The 488 ns tCYCLE timing constraint requires precise CS pulse width control and ≥32.768 MHz SCLK for reliable SPI frame synchronization in the ADS9226IRHBT.

Does the ADS9226IRHBT require an external reference voltage?

The ADS9226IRHBT supports both external and internally buffered reference configurations. When using the integrated reference buffers, an external reference voltage (VREFIN) between 1.4 V and AVDD/1.75 – 0.2 V must be applied to the REFIN pin. The buffers provide 1.75× gain to generate stable REFP_A/REFP_B outputs - eliminating need for external op-amps while maintaining <500 µV inter-channel mismatch in the ADS9226IRHBT.

How does the ADS9226IRHBT achieve simultaneous sampling across two channels?

The ADS9226IRHBT achieves true simultaneous sampling using two independent SAR conversion cores that share a common sampling clock derived from the CS rising edge. Both AINP_A/AINM_A and AINP_B/AINM_B inputs are acquired at identical instants with <1 ns channel-to-channel skew, verified by TI's ISOXT = –115 dB isolation specification. This hardware-synchronized acquisition is fundamental to vector control algorithms in the ADS9226IRHBT.

What package type and thermal characteristics does the ADS9226IRHBT use?

The ADS9226IRHBT uses a 32-pin VQFN package (5.00 mm × 5.00 mm) with exposed thermal pad. Its thermal metrics include RθJA = 29°C/W, RθJB = 9.4°C/W, and RθJC(bot) = 0.8°C/W - indicating efficient heat transfer to the PCB. TI recommends connecting the thermal pad directly to solid ground plane for optimal junction temperature management in high-throughput operation of the ADS9226IRHBT.

Can the ADS9226IRHBT interface directly with common microcontrollers or FPGAs?

Yes, the ADS9226IRHBT features an SPI-compatible enhanced serial interface with four dedicated SDO lines (SDO-0A/1A/0B/1B) and standard CS/SCLK signals. It supports DVDD from 1.65 V to 5.5 V, enabling direct connection to 1.8 V, 3.3 V, or 5 V logic families. The left-justified 16-bit output format and deterministic timing allow seamless integration with ARM Cortex-M, Xilinx Artix-7, and Intel MAX 10 devices without protocol translation in the ADS9226IRHBT.