Texas Instruments TLV2548CPWR

Overview

TLV2548CPWR from Texas Instruments is a 12-bit, 200-kSPS successive-approximation analog-to-digital converter (ADC) with integrated reference, conversion clock, and 8-word FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI (CPOL = 0, CPHA = 0) and DSP-compatible serial interfaces up to 20 MHz SCLK, and features hardware- or software-controllable sampling for precision data acquisition in industrial sensor interfaces.

For engineers reviewing the TLV2548CPWR datasheet, TLV2548CPWR pinout, TLV2548CPWR application, or TLV2548CPWR equivalent, this page delivers verified technical context, exact pin functions, real-world timing behavior, confirmed alternative options, and design-meaningful specifications - all grounded in the official SLAS198E datasheet and TI's validated device characterization.

Technical Context

The TLV2548CPWR implements a charge-redistribution SAR architecture with break-before-make analog multiplexing across eight single-ended inputs (A0–A7). Its internal 4-V or 2-V reference can be overridden by external REFP/REFM, and conversion clock selection includes internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling configurable trade-offs between speed (up to 2.8 µs with 20-MHz SCLK) and sampling fidelity.

It supports four conversion modes (one-shot, repeat, sweep, repeat-sweep), each with programmable FIFO trigger levels (1/4 to full) and dual sampling control: normal (12- or 24-SCLK programmable period) or extended (asynchronous CSTART-triggered, independent of SCLK). EOC/INT pin function is software-selectable, but INT output is mandatory in repeat/sweep modes per datasheet Table 4.

Key Specifications

Pinout & Package

TLV2548CPWR is packaged in a 20-pin TSSOP (PW) with 0.65-mm pitch, RoHS-compliant, and rated for 0°C to 70°C operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2544CPW, the TLV2548CPWR uniquely combines 8-channel multiplexing, programmable FIFO buffering, and CSTART-triggered extended sampling - making it the only option among the three capable of robust, synchronized multi-sensor acquisition with high-impedance source support in a single 20-pin package.

Availability

TLV2548CPWR is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, portable data loggers, and test & measurement equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV2548CPWR 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, embedded processing, and connectivity technologies, with decades of expertise in precision data converters and industrial-grade IC design.

The TLV2548CPWR belongs to TI's TLV254x family of low-power, high-speed SAR ADCs engineered specifically for cost-sensitive, space-constrained industrial and portable instrumentation where integrated reference, FIFO, and flexible sampling control reduce system-level complexity.

FAQ

What is the maximum achievable conversion speed for TLV2548CPWR?

The TLV2548CPWR achieves a minimum conversion time of 2.8 µs when using a 20-MHz SCLK as the conversion clock source (CFR bits D8–D7 = 01). This yields a theoretical maximum throughput of 200 kSPS. Actual sustained rate depends on host interface overhead and FIFO management - full 8-word FIFO read cycles require 16 SCLKs per word, limiting continuous streaming to ~125 kSPS in practice.

Can TLV2548CPWR operate with an external reference, and how is it configured?

Yes, TLV2548CPWR supports external reference via REFP and REFM pins. To enable it, set CFR bit D11 = 0 (Reference Select = External), and apply the desired reference voltage across REFP and REFM (e.g., 2.5 V). When using external reference, tie REFM to analog ground only if the external reference is single-ended; for differential references, connect both pins to the reference source. Internal reference must be disabled for external operation.

How does the CSTART pin function in TLV2548CPWR extended sampling mode?

In extended sampling mode, the falling edge of CSTART initiates analog sampling, and its low time directly controls the sampling period - independent of SCLK frequency. The rising edge terminates sampling and starts conversion. This mode requires internal reference (CFR D11 = 1) and is valid only in repeat, sweep, or repeat-sweep modes. Minimum CSTART low time must meet t_SAMPLE ≥ 2 µs per datasheet Section 8.

What are the key differences between TLV2548CPWR and TLV2544CPW?

The TLV2548CPWR provides eight analog inputs (A0–A7), while TLV2544CPW offers only four (A0–A3). Both share identical timing, power, reference, and interface specifications. The TLV2548CPWR's sweep sequence register (CFR D4–D3) supports longer auto-sequences (e.g., 0–1–2–3–4–5–6–7), whereas TLV2544CPW sequences are limited to four channels. Pinout is compatible in 20-TSSOP, with A4–A7 unused on TLV2544CPW.

Does TLV2548CPWR support daisy-chain SPI configuration?

No, TLV2548CPWR does not support true daisy-chaining. Its serial interface is point-to-point: CS, SCLK, SDI, and SDO are dedicated per device. While multiple TLV2548CPWR units can share SCLK and SDI lines with individual CS lines, SDO outputs cannot be wired-OR'd due to 3-state behavior - each device requires its own SDO trace or an external multiplexer for shared bus operation.