Texas Instruments ADC122S706CIMTX/NOPB

Overview

ADC122S706CIMTX/NOPB from Texas Instruments is a dual 12-bit, simultaneous-sampling SAR ADC with true differential inputs, 500 kSPS to 1 MSPS throughput, ±1 LSB INL (max), and SPI/QSPI/MICROWIRE-compatible dual serial outputs - used in motor control for synchronized current/voltage sensing and multi-axis position feedback.

For engineers reviewing the ADC122S706CIMTX/NOPB datasheet, ADC122S706CIMTX/NOPB pinout, ADC122S706CIMTX/NOPB application, or ADC122S706CIMTX/NOPB equivalent, key selection criteria include guaranteed simultaneous sampling across channels, external reference flexibility (1.0 V to VA), independent analog/digital supply rails (VA: 4.5–5.5 V, VD: 2.7–VA), −40°C to +105°C operation, and TSSOP-14 package compatibility with space-constrained industrial signal chains.

Technical Context

The ADC122S706CIMTX/NOPB implements two independent successive-approximation register (SAR) cores sharing a common clock and control interface, with fully differential track-and-hold circuits preserving phase coherence between Channel A and Channel B inputs. Its architecture maintains differential signaling end-to-end - from input pins through internal charge redistribution DAC - enabling >90 dB CMRR and −90 dB channel-to-channel isolation.

It supports dual-output mode (DOUTA/DOUTB active) or single-output mode (DUAL pin grounded), both delivering 12-bit binary 2's complement data with 4 leading zero bits. Conversion timing is deterministic: 12 SCLK cycles for conversion plus 3 SCLK cycles for acquisition, requiring 16 total SCLK edges per sample at up to 16 MHz clock rate.

Key Specifications

Pinout & Package

ADC122S706CIMTX/NOPB is housed in a 14-lead TSSOP package (4.4 mm × 5.0 mm, 0.65 mm pitch), optimized for automated assembly and thermal performance (θJA = 121°C/W). Pin functions are validated per TI SNAS408A Rev. March 2013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IPW and AD7321BRUZ, ADC122S706CIMTX/NOPB uniquely delivers guaranteed simultaneous sampling at 1 MSPS with independent analog/digital supplies and externally scalable reference - making it the only option among the three for real-time motor control and synchronized waveform capture.

Availability

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

Supply support for ADC122S706CIMTX/NOPB 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 ADC122S706CIMTX/NOPB belongs to TI's high-performance SAR ADC product line, engineered specifically for industrial motor control, energy measurement, and real-time signal acquisition where channel synchronization, low power, and robust operation over −40°C to +105°C are mandatory.

FAQ

What is the guaranteed simultaneous sampling accuracy between Channel A and Channel B in ADC122S706CIMTX/NOPB?

The ADC122S706CIMTX/NOPB guarantees true simultaneous sampling with ≤0.02 LSB integral non-linearity (INL) matching and ≤0.02 LSB differential non-linearity (DNL) matching between channels. This ensures sub-0.1° phase alignment at 100 kHz input frequencies - verified across −40°C to +105°C and supported by TI SNAS408A electrical characteristics tables.

Does ADC122S706CIMTX/NOPB support independent analog and digital supply voltages?

Yes, ADC122S706CIMTX/NOPB supports independent analog (VA: 4.5–5.5 V) and digital (VD: 2.7–VA) supplies. This separation minimizes digital switching noise coupling into analog conversion paths - confirmed in the Operating Ratings table and Power Supply Characteristics section of the SNAS408A datasheet.

What serial interface standards is ADC122S706CIMTX/NOPB compatible with?

ADC122S706CIMTX/NOPB supports SPI™, QSPI™, MICROWIRE, and common DSP serial interfaces. Its DOUTA/DOUTB outputs deliver 12-bit binary 2's complement data with 4 leading zero bits, MSB-first, synchronized to SCLK falling edges - as specified in the "Serial Interface" feature list and timing diagrams of SNAS408A.

Can ADC122S706CIMTX/NOPB operate with a 2.5 V reference voltage?

Yes, ADC122S706CIMTX/NOPB accepts VREF from 1.0 V to VA. With VA = 5.0 V, a 2.5 V reference establishes a ±2.5 V differential input range - explicitly validated in the Electrical Characteristics table (VREF = 2.5 V test condition) and Figure 46 (Input Common-Mode Voltage) of SNAS408A.

What is the minimum and maximum SCLK frequency for reliable operation of ADC122S706CIMTX/NOPB?

The ADC122S706CIMTX/NOPB operates reliably with SCLK between 8 MHz (maximum) and 0.8 MHz (minimum), as defined in the AC Electrical Characteristics table of SNAS408A. At 16 MHz SCLK, conversion completes in 12 cycles (750 ns), and acquisition requires 3 cycles - totaling 16 SCLK edges per sample.