Texas Instruments ADC122S706CIMTX

Overview

ADC122S706 from Texas Instruments is a dual 12-bit, simultaneous-sampling SAR analog-to-digital converter with true differential inputs per channel, 500 kSPS to 1 MSPS throughput, ±1 LSB INL (max), 71 dBc SNR (min), and operation over −40°C to +105°C - used in motor control for synchronized current/voltage sensing.

For engineers reviewing the ADC122S706 datasheet, ADC122S706 pinout, ADC122S706 application, or ADC122S706 equivalent, this page delivers verified specifications, validated dual-channel timing behavior, real-world power consumption data at 1 MSPS, and confirmed SPI/QSPI/MICROWIRE serial interface compatibility - all specific to the ADC122S706CIMTX variant in 14-lead TSSOP.

Technical Context

The ADC122S706 employs a successive-approximation register (SAR) architecture with independent track-and-hold circuits on both channels, preserving phase coherence between CHA+/- and CHB+/- during simultaneous sampling. Its differential input structure extends through the entire signal path, enabling >90 dB common-mode rejection.

It supports dual serial outputs (DOUTA/DOUTB) in binary 2's complement format, configurable via the DUAL pin for either independent channel streaming or time-multiplexed output on DOUTA. Conversion requires exactly 16 SCLK cycles, with acquisition time of 3 SCLK cycles and aperture delay of 6 ns.

Key Specifications

Pinout & Package

ADC122S706CIMTX is housed in a 14-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), optimized for high-density PCB layouts and thermal performance (θ_JA = 121°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IDGSR and AD7321BRUZ, the ADC122S706CIMTX uniquely balances 1 MSPS simultaneous sampling, true differential inputs, compact 14-TSSOP packaging, and industrial temperature operation - making it optimal for space-constrained, high-dynamics embedded control.

Availability

ADC122S706CIMTX is available at Aetrix Electronics and suitable for motor control, power monitoring, multi-axis positioning, and industrial instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for ADC122S706CIMTX 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 connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The ADC122S706 belongs to TI's high-performance SAR ADC product line, engineered specifically for real-time control systems demanding synchronized multi-channel acquisition, low latency, and robust operation in harsh electrical environments.

FAQ

What is the maximum guaranteed sample rate for ADC122S706CIMTX?

The ADC122S706CIMTX is guaranteed to operate at up to 1 MSPS across its full industrial temperature range (−40°C to +105°C) with VA = 4.5–5.5 V, VD = 2.7–VA, and fSCLK = 8–16 MHz. At 16 MHz SCLK, conversion completes in 16 clock cycles (1 MSPS), and timing margins remain compliant per Figure 1 in the SNAS408A datasheet. The ADC122S706CIMTX does not support oversampling modes beyond this rate.

Does ADC122S706CIMTX support true differential input on both channels?

Yes, ADC122S706CIMTX provides true differential analog inputs on both Channel A (CHA+/CHA−) and Channel B (CHB+/CHB−), with common-mode voltage range extending from −VREF to +VREF. The internal SAR architecture preserves differential signaling from track-and-hold through conversion, delivering >90 dB CMRR and <0.02 LSB inter-channel INL matching - confirmed in Electrical Characteristics Table 1 of SNAS408A.

How does the DUAL pin affect serial data output behavior in ADC122S706CIMTX?

When DUAL is logic high, ADC122S706CIMTX outputs Channel A's 12-bit result on DOUTA and Channel B's result on DOUTB simultaneously. When DUAL is grounded, both results are time-multiplexed on DOUTA (Channel A first), while DOUTB enters high-impedance state - enabling single-data-line systems without hardware redesign. This mode reduces PCB routing complexity but doubles serial transfer time per sample pair.

What power supply configurations are supported by ADC122S706CIMTX?

ADC122S706CIMTX supports independent analog (VA) and digital (VD) supplies: VA = 4.5–5.5 V, VD = 2.7–VA. At VA = 5 V and VD = 3 V, typical power consumption is 20 mW at 1 MSPS. Power-down mode (CS high) draws just 3 µW. Decoupling requires 0.1 µF ceramic + 1–10 µF bulk capacitor per supply, as specified in Pin Descriptions and Power Supply Characteristics sections of SNAS408A.

Is ADC122S706CIMTX compatible with standard SPI interfaces?

Yes, ADC122S706CIMTX is fully compatible with SPI™, QSPI™, and MICROWIRE serial protocols. It uses standard 4-wire SPI signaling (CS, SCLK, DOUTA/DOUTB) with MSB-first, binary 2's complement output. Timing parameters - including tCSSU, tDA, tDH, and tDIS - meet SPI Mode 0/3 requirements across 8–16 MHz SCLK, and are validated in Figures 1–2 and Timing Specifications Table of SNAS408A.