Texas Instruments TLV2548IPW

Overview

TLV2548IPW from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (ADC) with built-in reference, conversion clock, and 8-word FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI/DSP-compatible serial interface (CPOL = 0, CPHA = 0), and features hardware- or software-controllable sampling period - used in industrial data acquisition, sensor signal conditioning, and embedded control systems.

For engineers reviewing the TLV2548IPW datasheet, TLV2548IPW pinout, TLV2548IPW application, or TLV2548IPW equivalent, key selection considerations include its 8-channel analog multiplexer, ±1 LSB differential/integral nonlinearity, 70 dB SNDR at 12 kHz, programmable sweep modes, and −40°C to 85°C industrial temperature rating.

Technical Context

The TLV2548IPW implements a charge redistribution SAR architecture with break-before-make analog multiplexer for 8 analog inputs plus three internal test voltages. Sampling is configurable as normal (12 or 24 SCLKs) or extended via dedicated CSTART pin, enabling precise control over acquisition time independent of serial clock.

Conversion clock sources include internal oscillator (3.86 µs typical), external SCLK, SCLK/2, or SCLK/4 - supporting up to 20-MHz SCLK for high-speed interfacing. The device integrates dual internal references (2 V or 4 V), accepts external reference, and provides EOC/INT pin reconfiguration for host interrupt or end-of-conversion signaling.

Key Specifications

Pinout & Package

TLV2548IPW is packaged in a 20-pin TSSOP (PW) with 0.65-mm pitch, rated for −40°C to 85°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2548IPW, ADS7822U trades resolution and integration for cost, while ADS8320EB increases resolution at the expense of speed and embedded functionality - making TLV2548IPW optimal for balanced performance in industrial multi-channel acquisition.

Availability

TLV2548IPW is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and portable instrumentation requiring stable component supply across extended temperature ranges.

Supply support for TLV2548IPW 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 focused on analog and embedded processing technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The TLV2548IPW belongs to TI's TLV25xx family of low-power, high-performance SAR ADCs designed specifically for cost-sensitive, space-constrained industrial and embedded systems requiring integrated references and flexible serial interfaces.

FAQ

What is the operating temperature range of the TLV2548IPW?

The TLV2548IPW is specified for industrial operation from −40°C to +85°C. This rating is confirmed in the "AVAILABLE OPTIONS" table of the SLAS198E datasheet, where the 'I' suffix denotes the −40°C to 85°C grade, and the PW package variant TLV2548IPW is explicitly listed under that temperature range.

Does the TLV2548IPW support both SPI and DSP serial interfaces?

Yes, the TLV2548IPW supports SPI (CPOL = 0, CPHA = 0) and TI DSP-compatible interfaces. When FS = 1, it behaves as a standard 4-wire SPI device; when FS is actively driven low by a DSP, it uses frame-sync timing with data latched on falling SCLK edges - both modes are fully documented in the functional description and timing diagrams of the SLAS198E datasheet.

How does the CSTART pin function in the TLV2548IPW?

The CSTART pin provides asynchronous control of sampling: its falling edge starts sampling, and its rising edge ends sampling and initiates conversion. This mode is independent of SCLK and is especially useful for high-impedance sources or when precise timing alignment to external events is required - as detailed in the "extended sampling" section of the SLAS198E datasheet.

Can the TLV2548IPW operate with an external reference voltage?

Yes, the TLV2548IPW supports external reference via REFP and REFM pins. Bit D11 of the Configuration Register (CFR) selects external reference mode; when set to '0', the internal reference is disabled and the full-scale range becomes V_REFP − V_REFM, enabling user-defined reference voltages up to the supply rails - per Table 2 and "detailed description" sections of SLAS198E.

What are the FIFO interrupt trigger levels supported by the TLV2548IPW?

The TLV2548IPW supports four FIFO interrupt trigger levels via CFR bits D1–D0: Full (level 7), 3/4 (level 5), 1/2 (level 3), and 1/4 (level 1). Each level generates an INT assertion when the FIFO reaches that depth, allowing flexible trade-offs between interrupt frequency and data latency - as defined in Table 2 and "TLV2544/TLV2548 conversion modes" section of SLAS198E.