Texas Instruments TLV2548IDWR

Overview

TLV2548IDWR from Texas Instruments is a 12-bit, 200-KSPS SAR analog-to-digital converter with integrated reference, conversion clock, and 8-word FIFO. It operates from a single 2.7-V to 5.5-V supply, supports SPI/DSP serial interfaces up to 20 MHz, and features differential/nonlinearity error of ±1 LSB - used in industrial data acquisition systems requiring high-resolution sampling with low power and flexible channel sequencing.

For engineers reviewing the TLV2548IDWR datasheet, TLV2548IDWR pinout, TLV2548IDWR application, or TLV2548IDWR equivalent, key selection considerations include its 8-channel analog multiplexer, programmable sweep modes (repeat/sweep/repeat-sweep), extended sampling via CSTART pin, internal 2-V/4-V reference options, and −40°C to 85°C industrial temperature rating.

Technical Context

The TLV2548IDWR implements a charge-redistribution successive-approximation ADC architecture with break-before-make analog multiplexer for 8 input channels (A0–A7) and three internal test voltages. Its configurable conversion clock source (internal OSC, SCLK, SCLK/2, or SCLK/4) enables conversion times as fast as 3.86 µs (with internal OSC) or scalable timing under high-speed serial clocks.

It supports four conversion modes - one-shot, repeat, sweep, and repeat-sweep - each with programmable FIFO trigger levels (1/4 to full) and EOC/INT pin function selection. Sampling period is software-selectable (12 or 24 SCLKs) or hardware-controlled via asynchronous CSTART, enabling precise timing control for high-impedance sources or variable signal settling requirements.

Key Specifications

Pinout & Package

TLV2548IDWR is packaged in a 20-pin SOIC (DW) body with 0.300-inch width, RoHS-compliant, 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 TLV2548IDWR, ADS7822U trades resolution and integrated features for lower cost and power, while ADS8320EB prioritizes accuracy over speed and automation - TLV2548IDWR uniquely balances 12-bit performance, 200-KSPS throughput, hardware-accelerated channel sweeping, and ultra-low-power operation in a single SOIC package.

Availability

TLV2548IDWR is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, portable data loggers, and motor drive current sensing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2548IDWR 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 TLV2548IDWR belongs to TI's TLV25xx family of low-power, high-performance SAR ADCs engineered specifically for industrial data acquisition, sensor interfacing, and portable instrumentation where integration, reliability, and temperature robustness are critical.

FAQ

What is the maximum sampling rate supported by the TLV2548IDWR?

The TLV2548IDWR achieves a maximum throughput of 200 KSPS. This rate is attainable using the internal oscillator as the conversion clock source, delivering a fixed 3.86 µs conversion time. When using an external SCLK as the clock source, the effective rate depends on the selected division factor (SCLK/1, /2, or /4) and SCLK frequency - for example, with a 20-MHz SCLK and SCLK/1 mode, t_conv = 14 × 1 / 20 MHz = 0.7 µs, enabling higher effective rates within timing constraints of the full cycle.

Does the TLV2548IDWR require an external reference voltage?

No, the TLV2548IDWR does not require an external reference voltage. It integrates a selectable 2-V or 4-V internal reference, configured via CFR bit D10. When using the internal reference, REFM must be tied to analog ground. An external reference may be applied differentially across REFP and REFM for custom full-scale ranges, but this is optional - the internal reference fully enables operation of TLV2548IDWR out-of-the-box.

How does the CSTART pin function in TLV2548IDWR operation?

The CSTART pin provides hardware-controlled, asynchronous sampling initiation for the TLV2548IDWR. Its falling edge starts the sampling period; its rising edge ends sampling and triggers conversion. This mode operates independently of SCLK timing, allowing precise control over aperture time - especially valuable for high-impedance sources or signals requiring extended settling. CSTART is valid only when the internal reference is selected and in repeat/sweep/repeat-sweep modes.

Can the TLV2548IDWR interface directly with a TMS320 DSP processor?

Yes, the TLV2548IDWR supports direct interface with TI TMS320 DSP processors via its FS (frame sync) pin. When FS is used, it replaces CS as the primary frame-start signal: a high-to-low FS transition resets the internal counter and enables SDI, synchronizing serial data framing to the DSP's timing. The device accepts standard DSP serial protocols and supports MSB-first data transfer with configurable SCLK edge alignment - no level-shifting or protocol translation is needed for TLV2548IDWR integration.

What are the key differences between TLV2548IDWR and TLV2544IDWR?

The TLV2548IDWR features eight analog inputs (A0–A7), while the TLV2544IDWR has only four (A0–A3). Additionally, TLV2548IDWR supports more sweep sequence options (e.g., 0–1–2–3–4–5–6–7) and includes dedicated pins A4–A7, CSTART, and FS - making it suitable for complex multi-sensor systems. Both share identical resolution (12-bit), throughput (200 KSPS), reference options, and power specifications, but TLV2548IDWR offers greater channel scalability and advanced timing control.