Texas Instruments ADS7253IRTER

Overview

ADS7253IRTER from Texas Instruments is a dual, 12-bit, 1-MSPS simultaneous-sampling analog-to-digital converter (ADC) with pseudo-differential and single-ended input support, internal 2.5-V reference, and SPI-compatible serial interface. It delivers ±1-LSB max INL, 72.9-dB SNR, and operates across –40°C to 125°C for motor control position feedback and power quality monitoring.

For engineers reviewing the ADS7253IRTER datasheet, ADS7253IRTER pinout, ADS7253IRTER application, or ADS7253IRTER equivalent, this page provides verified specifications, validated pin functions, confirmed dual-channel isolation (–80 dB), and real-world implementation context for industrial embedded systems requiring synchronized sampling of two analog signals.

Technical Context

The ADS7253IRTER integrates two independent ADC cores sharing a common clock and control logic, enabling true simultaneous sampling without inter-channel skew. Each channel features programmable reference sources (REFIO_A/REFIO_B), dedicated reference grounds (REFGND_A/REFGND_B), and supports both 16-clock and 32-clock serial readout modes.

Its analog front-end accepts pseudo-differential inputs (±VREF/2 range) or single-ended inputs (0 to VREF), with input leakage <0.1 µA and 4-pF hold-mode capacitance. The device uses a successive-approximation register (SAR) architecture and includes internal reference buffering, achieving 1-µs throughput time at 1 MSPS with internal reference enabled.

Key Specifications

Pinout & Package

ADS7253IRTER is available in the WQFN-16 (3 mm × 3 mm) package with exposed thermal pad. Pin functions are electrically and functionally identical to the TSSOP-16 variant (ADS7253IPWR), supporting drop-in layout compatibility across package types.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7253IRTER, ADS7853IRTER offers +2 bits of resolution and +9.1 dB SNR at identical speed and footprint, while ADS8353IRTER trades 400 kSPS for +4 bits and +16.1 dB SNR-enabling tiered design reuse across cost/performance segments.

Availability

ADS7253IRTER is available at Aetrix Electronics and suitable for motor control position feedback, three-phase power quality monitoring, and protection relay analog front-ends requiring stable component supply and extended temperature qualification.

Supply support for ADS7253IRTER 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 and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade ICs.

The ADSxx53 family-including ADS7253IRTER-is designed for high-reliability industrial automation systems requiring synchronized dual-channel acquisition, robust EMC performance, and operation across extreme ambient temperatures.

FAQ

What is the maximum sampling rate of the ADS7253IRTER?

The ADS7253IRTER achieves a maximum throughput of 1 MSPS in both 16-clock and 32-clock serial interface modes. This rate is maintained across the full –40°C to 125°C operating temperature range with AVDD = 5 V and DVDD = 3.3 V, enabling real-time capture of signals up to 400 kHz without aliasing. The ADS7253IRTER does not support oversampling modes beyond its rated 1-MSPS specification.

Does the ADS7253IRTER support fully differential inputs?

No, the ADS7253IRTER does not support fully differential inputs. It supports pseudo-differential inputs (±VREF/2 range with respect to REFGND_x) and single-ended inputs (0 to VREF). Fully differential operation requires devices like the ADS7254 or ADS7854, which have dedicated IN+ and IN– pins per channel without shared reference ground constraints.

Can the internal 2.5-V reference be used for both ADC channels simultaneously?

Yes, the ADS7253IRTER's internal 2.5-V reference is independently buffered for each channel (REFIO_A and REFIO_B), allowing simultaneous use with matched output (±1 mV typical VREF_A–VREF_B mismatch). Both references are enabled by default and require 10-µF ceramic capacitors at each REFIO pin for stability-no external reference circuitry is needed for basic operation.

What is the ADC-to-ADC isolation specification for the ADS7253IRTER?

The ADS7253IRTER provides –80 dB of ADC-to-ADC isolation (ISOXT) at f_IN = 15 kHz and 10%FS, measured between channels A and B. This isolation is achieved through separate REFGND_A/REFGND_B pins, independent reference buffers, and physical layout partitioning within the die-ensuring minimal crosstalk during simultaneous sampling of high-amplitude or fast-transient signals.

Is the ADS7253IRTER pin-compatible with other devices in the ADSxx53 family?

Yes, the ADS7253IRTER is fully pin-compatible with ADS7853IRTER and ADS8353IRTER in both WQFN-16 and TSSOP-16 packages. All share identical pin functions, electrical interfaces, and timing behavior-allowing hardware reuse across 12-bit, 14-bit, and 16-bit variants without PCB redesign. Firmware must be updated only to handle differing resolution and timing margins.