Texas Instruments ADS7253IPW

Overview

ADS7253IPW 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 operates over –40°C to 125°C, delivers ±1-LSB max INL, 73.5-dB SNR, and supports motor position sensing and three-phase power control.

For engineers reviewing the ADS7253IPW datasheet, ADS7253IPW pinout, ADS7253IPW application, or ADS7253IPW equivalent, this page provides verified technical context, package-specific pin functions, real-world use cases in industrial motor control and protection relays, and validated alternative options for design flexibility.

Technical Context

The ADS7253IPW integrates two independent ADC cores with synchronized sampling control, enabling precise phase-aligned digitization of two analog channels. Each channel features programmable reference inputs (REFIO_A/REFIO_B), dedicated reference grounds (REFGND_A/REFGND_B), and supports both single-ended (AINP_x to GND) and pseudo-differential (AINP_x vs AINM_x) configurations with ±1.25-V full-scale range at 2.5-V reference.

Its serial interface operates in 16- or 32-clock modes, with CS-controlled frame timing, SDO_A/SDO_B dual-output capability, and compatibility with 1.65–5.5-V DVDD logic levels. Power management includes STANDBY (2.5 mA) and SPD (10–50 µA) low-power modes, optimized for real-time embedded systems requiring deterministic throughput at 1 MSPS.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package: 5.00 mm × 4.40 mm body, exposed thermal pad not present, lead pitch 0.65 mm, RoHS-compliant matte tin finish.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7253IPW, ADS7853IPW offers +2 bits resolution at same speed for tighter gain/linearity specs, while ADS8353IPW trades 400 kSPS throughput for +4 bits resolution-both retain pin compatibility but require firmware register updates for resolution-dependent timing.

Availability

ADS7253IPW is available at Aetrix Electronics and suitable for motor control, protection relay, and three-phase power quality measurement applications requiring stable component supply, extended temperature operation, and simultaneous dual-channel sampling capability.

Supply support for ADS7253IPW 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 IC design.

The ADSxx53 family-including ADS7253IPW-is engineered for high-reliability industrial automation, featuring simultaneous sampling, dual reference architecture, and extended temperature qualification to meet IEC 61000-4 and UL 61800 requirements.

FAQ

What is the maximum sampling rate of the ADS7253IPW?

The ADS7253IPW achieves a maximum throughput of 1 million samples per second (1 MSPS) in both 16-clock and 32-clock serial interface modes. This rate applies to each of its two independent ADC channels operating simultaneously, with guaranteed timing parameters including 1-µs throughput time and <40-ps inter-channel aperture match under recommended operating conditions (AVDD = 5 V, DVDD = 3.3 V, TA = –40°C to 125°C).

Does the ADS7253IPW include an internal voltage reference?

Yes, the ADS7253IPW integrates a factory-trimmed, buffered 2.5-V internal voltage reference with ±1-mV matching between channels at 25°C and ±10 ppm/°C temperature drift. This reference can be enabled via configuration register and delivered on REFIO_A/REFIO_B pins, eliminating the need for external reference components in most industrial applications while maintaining ±1-LSB INL performance across the full temperature range.

Can the ADS7253IPW operate with different analog and digital supply voltages?

Yes, the ADS7253IPW supports independent analog and digital supplies: AVDD must be 4.5–5.5 V for analog core and internal reference operation, while DVDD accepts 1.65–5.5 V for the SPI interface. This dual-supply architecture allows direct connection to 1.8-V, 3.3-V, or 5-V microcontrollers without level-shifting circuitry, provided proper decoupling (1.8 nF ceramic on AVDD, 100 nF on DVDD) and ground separation per datasheet layout guidelines.

What input configurations does the ADS7253IPW support?

The ADS7253IPW supports both single-ended (AINP_x to GND) and pseudo-differential (AINP_x vs AINM_x) analog input modes per channel. In single-ended mode, full-scale range is 0–VREF (e.g., 0–2.5 V); in pseudo-differential mode, it is ±VREF/2 (e.g., ±1.25 V). Input common-mode range is fixed relative to REFGND_x, and absolute input voltage limits are specified as –0.1 V to (VREF + 0.1 V) for AINM_x and 0 to 2×VREF for AINP_x when AVDD ≥ 2×VREF.

Is the ADS7253IPW pin-compatible with other devices in the ADSxx53 family?

Yes, the ADS7253IPW is fully pin-compatible with ADS7853IPW (14-bit) and ADS8353IPW (16-bit) in both TSSOP-16 (PW) and WQFN-16 (RTE) packages. All share identical pin functions, electrical interface timing, power supply requirements, and register map structure-enabling hardware reuse across resolution tiers. Firmware updates are required only for resolution-dependent parameters like clock cycle count and data word length.