Texas Instruments TLV2553IDWRQ1

Overview

TLV2553IDWRQ1 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 linearity, and supports unipolar/bipolar output modes in automotive-grade temperature range (–40°C to +85°C).

For engineers reviewing the TLV2553IDWRQ1 datasheet, TLV2553IDWRQ1 pinout, TLV2553IDWRQ1 application, or TLV2553IDWRQ1 equivalent, key selection factors include its 11 analog input channels, programmable MSB/LSB-first data format, built-in self-test modes, and compatibility with low-power portable data logging and battery-powered instrumentation designs.

Technical Context

The TLV2553IDWRQ1 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) eliminates external clock requirements for basic operation.

Control logic accepts 4-bit address/command via DATA IN synchronized to I/O CLOCK, then shifts out 12-bit conversion results on DATA OUT - all under chip-select (CS) arbitration. EOC pin signals conversion completion, supporting interrupt-driven host processor interfacing.

Key Specifications

Pinout & Package

TLV2553IDWRQ1 is packaged in a 20-pin SOIC (DW package), body size 12.80 mm × 7.50 mm, with standard gull-wing leads and RoHS-compliant finish. Thermal resistance R_θJA = 66°C/W supports moderate power dissipation without forced airflow.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2548IPW, TLV2553IDWRQ1 uniquely combines 11-channel multiplexing, EOC signaling, built-in self-test, and automotive qualification - making it optimal for safety-aware, multi-sensor embedded systems requiring verified accuracy and robust timing control.

Availability

TLV2553IDWRQ1 is available at Aetrix Electronics and suitable for process control sensor hubs, portable data loggers, and battery-powered medical instruments requiring stable component supply across extended production lifecycles.

Supply support for TLV2553IDWRQ1 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 automotive-qualified ICs.

The TLV2553IDWRQ1 belongs to TI's automotive-grade precision SAR ADC product line, designed specifically for reliable, low-power analog sensing in harsh environments including engine bays, industrial plants, and portable medical devices.

FAQ

What is the maximum sampling rate of the TLV2553IDWRQ1?

The TLV2553IDWRQ1 achieves up to 200 KSPS at VCC = 4.5–5.5 V with I/O CLOCK = 15 MHz, and 150 KSPS at VCC = 2.7–3.6 V with I/O CLOCK = 10 MHz. Conversion time is determined by internal oscillator frequency (2.56–4.15 MHz) and fixed 13.5-cycle overhead, yielding ~5.5–4.15 µs per sample. This enables accurate capture of signals up to ~70 kHz under Nyquist criteria. TLV2553IDWRQ1 performance remains stable across its full operating temperature range.

Does the TLV2553IDWRQ1 require an external reference voltage?

No - the TLV2553IDWRQ1 supports both external and internal reference configurations. When REF+ and REF– are left unconnected, it defaults to ratiometric operation using VCC and GND as reference rails. For higher accuracy, an external precision reference (e.g., 2.5 V or 4.096 V) can be applied differentially across REF+ and REF–, with mandatory 0.1-µF decoupling. TLV2553IDWRQ1 specifies REF+ input impedance of 6–9 kΩ during conversion and >1 MΩ statically.

How many analog input channels does the TLV2553IDWRQ1 support?

The TLV2553IDWRQ1 integrates an 11-channel analog multiplexer, accepting single-ended inputs on pins AIN0 through AIN10. These are internally routed to the SAR ADC core under 4-bit address control via DATA IN. Additionally, three internal self-test voltages (0 V, mid-scale, full-scale) are accessible through the same address register - enabling functional verification without external test equipment. TLV2553IDWRQ1 does not support differential input pairs.

What power-saving features does the TLV2553IDWRQ1 offer?

The TLV2553IDWRQ1 provides two independent power-down modes: software power-down (0.1–1 µA) activated via command register, and auto power-down (0.1–10 µA) triggered automatically after conversion completes. Both reduce ICC to microamp levels while preserving register state. Supply current is 0.9 mA at 2.7 V and 1.2 mA at 5 V during active conversion. TLV2553IDWRQ1's low dynamic power makes it ideal for battery-operated systems where duty-cycled sensing is employed.

Is the TLV2553IDWRQ1 compatible with standard SPI interfaces?

Yes - the TLV2553IDWRQ1 implements an SPI-compatible serial interface with CPOL = 0 and CPHA = 0 (data sampled on first clock edge, shifted on subsequent edges). It supports 8-, 12-, or 16-bit I/O formats and configurable MSB/LSB-first transmission. While not a full 4-wire SPI slave (lacking dedicated SCLK, MOSI, MISO, SS pins), its CS/DATA IN/DATA OUT/I/O CLOCK mapping aligns directly with standard SPI controllers when configured for 3-wire mode with shared bidirectional data line. TLV2553IDWRQ1 timing meets SPI timing margin requirements at rated clock frequencies.