Texas Instruments ADS7223SRHBT

Overview

ADS7223SRHBT from Texas Instruments is a dual, 12-bit, 1-MSPS successive-approximation register (SAR) analog-to-digital converter with four fully-differential or eight pseudo-differential input channels, simultaneous sampling per ADC pair, 73 dB typical SNR, –86 dB typical THD, and operation over –40°C to +125°C for motor current sensing in safety-critical drives.

For engineers reviewing the ADS7223SRHBT datasheet, ADS7223SRHBT pinout, ADS7223SRHBT application, or ADS7223SRHBT equivalent, this page delivers verified specifications, validated pin functions, confirmed industrial use cases including protection relays and three-phase power control, and two technically documented alternative parts with explicit functional and application-level differences.

Technical Context

The ADS7223SRHBT implements two independent SAR ADC cores with shared reference architecture and dual programmable 2.5-V buffered reference outputs (REFIO1/REFIO2), enabling independent input voltage range scaling per channel pair. It supports both half-clock (0.5–20 MHz) and full-clock (1–40 MHz) timing modes with 17.5 tCLK conversion time in half-clock mode.

Its analog front-end includes dedicated common-mode inputs (CMA/CMB) for pseudo-differential operation and integrated FIFO with up to four data storage slots per channel for oversampling. Control logic accepts CONVST-triggered sampling and supports ADS8361-compatible serial interface via SDI/SDOA/SDOB with RD-synchronized readout.

Key Specifications

Pinout & Package

ADS7223SRHBT is housed in a 5.0 mm × 5.0 mm, 32-pin VQFN (RHB) package with exposed thermal pad, optimized for high-density PCB layouts in motor control modules and protection relays.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7263SRHBT and ADS8363SRHBT, the ADS7223SRHBT provides the lowest-cost entry into TI's simultaneous-sampling dual-ADC family while retaining identical timing control, safety counter, FIFO depth, and industrial temperature qualification - making it ideal for cost-sensitive motor control and protection applications where 12-bit resolution suffices.

Availability

ADS7223SRHBT is available at Aetrix Electronics and suitable for motor control systems, protection relays, and power quality analyzers requiring stable component supply across extended temperature and long product lifecycles.

Supply support for ADS7223SRHBT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The ADSxxx3 family-including ADS7223SRHBT-is designed specifically for high-reliability industrial motor control and power system monitoring, emphasizing simultaneous sampling, functional safety features, and extended temperature operation.

FAQ

What is the maximum clock frequency supported by ADS7223SRHBT in full-clock mode?

The ADS7223SRHBT supports a maximum clock frequency of 40 MHz in full-clock mode, enabling minimum conversion time of 35 tCLK (875 ns) and sustained 1-MSPS throughput with proper timing margin. This specification is validated across –40°C to +125°C and applies to both AVDD = 5.5 V and DVDD = 3.6 V operating conditions per the SBAS523D datasheet Section 7.9.

Does ADS7223SRHBT support true differential input mode on all channels?

Yes, ADS7223SRHBT supports true fully-differential input mode on four channels - CHA0P/N, CHA1P/N, CHB0P/N, and CHB1P/N - with dedicated differential pairs per ADC core. In this mode, each ADC converts two simultaneous differential inputs (2×2 configuration), maintaining >92 dB CMRR up to 100 kHz as specified in Section 7.8 of the datasheet.

How does the dual reference architecture of ADS7223SRHBT improve system design?

The dual 2.5-V buffered reference outputs (REFIO1/REFIO2) in ADS7223SRHBT allow independent input range scaling for each ADC pair - for example, setting ±2.5 V range for current sensors and ±1.25 V for voltage dividers. This eliminates external PGA stages, reduces component count, and avoids gain mismatch errors between channels, directly improving measurement consistency in three-phase systems.

Is ADS7223SRHBT pin-compatible with ADS7263SRHBT and ADS8363SRHBT?

Yes, ADS7223SRHBT is pin-compatible with ADS7263SRHBT and ADS8363SRHBT in the 32-pin VQFN (RHB) package, sharing identical pin functions, electrical characteristics, timing behavior, and register map. This allows direct substitution in existing PCB designs when resolution or SNR requirements change, provided firmware handles the different output data width (12 vs. 14 vs. 16 bits).

What safety-related features does ADS7223SRHBT include for protection relay applications?

ADS7223SRHBT includes a hardware 2-bit safety counter that increments on each conversion cycle and can be monitored by external safety controllers, plus guaranteed simultaneous sampling with <50 ps inter-ADC timing match. These features, combined with –40°C to +125°C operation and 125°C junction temperature rating, support IEC 61508 SIL-2 and IEC 61850-3 compliance in protection relay input stages.