Texas Instruments TLV2553IPWR

Overview

TLV2553IPWR from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (SAR ADC) with integrated 11-channel analog multiplexer, on-chip sample-and-hold, and SPI-compatible serial interface. It operates from 2.7 V to 5.5 V, delivers ±1 LSB INL/DNL, supports unipolar/bipolar output modes, and targets low-power data acquisition in portable instrumentation.

For engineers reviewing the TLV2553IPWR datasheet, TLV2553IPWR pinout, TLV2553IPWR application, or TLV2553IPWR equivalent, key selection considerations include its 11 analog input channels, programmable MSB/LSB-first output, built-in self-test modes, and compatibility with 15 MHz I/O clock (at 5 V) for high-throughput serial interfacing.

Technical Context

The TLV2553IPWR implements a switched-capacitor SAR architecture with differential high-impedance reference inputs (REF+, REF–), enabling ratiometric conversion and noise isolation. Its internal oscillator (2.56–4.15 MHz) drives conversion timing without external clock dependency.

Control logic accepts 4-bit address/command via DATA IN synchronized to I/O CLOCK rising edges, then shifts out 12-bit conversion results on DATA OUT synchronized to falling edges - supporting 8-, 12-, or 16-clock transfer formats with CS-enabled or CS-free protocols.

Key Specifications

Pinout & Package

TSSOP-20 package (6.50 mm × 4.40 mm), thermally enhanced with exposed pad not electrically connected; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with TLV2553IPWR, ADS7822U trades resolution for lower cost and smaller footprint, while TLV2548IPW offers identical performance in an 8-channel variant - both require evaluation of MUX count, pin compatibility, and reference architecture fit for the target signal chain.

Availability

TLV2553IPWR is available at Aetrix Electronics and suitable for process control, portable data logging, and battery-powered instrumentation requiring stable component supply, long-term lifecycle support, and industrial-temperature grade performance.

Supply support for TLV2553IPWR 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 low-power signal chains.

The TLV2553IPWR belongs to TI's low-power SAR ADC product line, designed specifically for battery-operated and space-constrained industrial sensing applications demanding high resolution without sacrificing energy efficiency.

FAQ

What is the maximum sampling rate of the TLV2553IPWR under recommended operating conditions?

The TLV2553IPWR achieves up to 200 KSPS at VCC = 5 V with I/O CLOCK = 15 MHz, and 150 KSPS at VCC = 3 V with I/O CLOCK = 10 MHz. This throughput assumes optimal channel acquisition time and excludes setup/hold overhead. The internal oscillator frequency (2.56–4.15 MHz) governs conversion timing, and total cycle time varies with selected I/O format (8/12/16 clocks). TLV2553IPWR maintains this rate across its full –40°C to +85°C operating range.

Does the TLV2553IPWR require an external reference voltage, or can it operate with an internal reference?

The TLV2553IPWR does not include an internal voltage reference; it requires external differential reference inputs applied to REF+ and REF– pins. These may be supplied by a precision external reference IC or derived ratiometrically from the system supply (e.g., VCC and GND). A 0.1-µF capacitor must be placed between REF+ and REF– when using external references to ensure stability. TLV2553IPWR supports reference voltage differences from 1.9 V to VCC, enabling both unipolar and bipolar input ranges.

How many analog input channels does the TLV2553IPWR support, and how are they selected?

The TLV2553IPWR integrates an 11-channel analog multiplexer supporting single-ended inputs AIN0 through AIN10. Channel selection is performed via a 4-bit address loaded into the command register through the DATA IN pin during the first four rising edges of I/O CLOCK. Valid addresses range from 0000 (AIN0) to 1010 (AIN10); addresses 1011, 1100, and 1101 activate internal self-test modes. The TLV2553IPWR does not support differential input pairs or simultaneous sampling.

What power-saving features does the TLV2553IPWR offer, and how are they activated?

The TLV2553IPWR provides two power-down modes: software power-down (ICC ≤ 1 µA) activated by writing specific command bits, and auto power-down (ICC ≤ 10 µA) triggered automatically after conversion completes. Both modes disable the internal oscillator and analog circuitry while retaining register contents. Recovery time is under 10 µs. These features are critical for extending battery life in portable instruments - TLV2553IPWR draws only 0.9 mA typical at 2.7 V during active conversion, making it suitable for energy-sensitive designs.

Is the TLV2553IPWR compatible with standard SPI interfaces, and what clock polarity and phase settings are required?

Yes, the TLV2553IPWR is SPI-compatible with CPOL = 0 (clock idle low) and CPHA = 0 (data sampled on first clock edge). It supports I/O CLOCK frequencies up to 15 MHz at 5 V and 10 MHz at 2.7 V. DATA IN accepts commands on rising edges; DATA OUT shifts data on falling edges. The TLV2553IPWR does not support dual or quad SPI modes. Its 3-state DATA OUT and dedicated CS pin allow direct connection to multi-peripheral SPI buses without additional logic.