Texas Instruments TLV2548CPWRG4

Overview

TLV2548CPWRG4 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/DSP-compatible serial interface up to 20 MHz, and features differential/nonlinearity error of ±1 LSB and SNDR of 70 dB at 12 kHz - used in industrial data acquisition systems requiring high-resolution sampling with low-power operation.

For engineers reviewing the TLV2548CPWRG4 datasheet, TLV2548CPWRG4 pinout, TLV2548CPWRG4 application, or TLV2548CPWRG4 equivalent, key selection considerations include its 20-pin TSSOP package, hardware- and software-controllable power-down modes (1 µA max), programmable auto-channel sweep, extended sampling via CSTART pin, and internal 2-V/4-V reference options.

Technical Context

The TLV2548CPWRG4 implements a charge redistribution SAR architecture with break-before-make analog multiplexer for 8-channel differential/true-single-ended input selection. Its conversion clock can be sourced from internal oscillator or external SCLK (divided by 1, 2, or 4), enabling configurable timing from 3.86 µs (internal OSC) to sub-2.8 µs (20-MHz SCLK).

It integrates a 12-bit × 8 FIFO, configurable EOC/INT pin function, and four conversion modes (one-shot, repeat, sweep, repeat-sweep) controlled via a 12-bit configuration register (CFR). Sampling period is programmable (12 or 24 SCLKs) or fully hardware-controlled via CSTART, supporting high-impedance sources and precise timing-critical applications.

Key Specifications

Pinout & Package

TLV2548CPWRG4 is housed in a 20-pin TSSOP (PW) package with 0.65-mm pitch, surface-mount footprint, and thermal pad exposed on underside for enhanced power dissipation in compact PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and ADS8320EB, the TLV2548CPWRG4 uniquely combines 12-bit accuracy, 200-KSPS speed, on-chip FIFO, internal reference, and CSTART-triggered sampling - making it optimal for embedded real-time data acquisition where integration, timing control, and power efficiency are jointly critical.

Availability

TLV2548CPWRG4 is available at Aetrix Electronics and suitable for industrial process monitoring, motor drive current sensing, portable data loggers, and automated test equipment requiring stable component supply across production lifecycles.

Supply support for TLV2548CPWRG4 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 industrial-grade signal chain solutions.

The TLV2548CPWRG4 belongs to TI's TLV25xx family of low-power, high-performance SAR ADCs designed specifically for cost-sensitive, space-constrained industrial and instrumentation applications demanding integrated functionality and robust operation from 0°C to 70°C.

FAQ

What is the maximum sampling rate supported by the TLV2548CPWRG4?

The TLV2548CPWRG4 achieves a maximum throughput of 200 KSPS under specified conditions. This rate is attainable using the internal oscillator as the conversion clock or with an external 20-MHz SCLK divided appropriately. Actual sustained rate depends on selected conversion mode, sampling period (short/long), and interface timing margins - verified in the SLAS198E datasheet Section 8 timing diagrams.

Does the TLV2548CPWRG4 require external reference components?

No, the TLV2548CPWRG4 includes an internal 2-V or 4-V reference that requires only REFM tied to analog ground. When using the internal reference, no external reference IC or precision resistors are needed. External reference operation does require 10-µF and 0.1-µF capacitors between REFP and REFM per the datasheet recommendations.

How does the CSTART pin function in the TLV2548CPWRG4?

The CSTART pin provides asynchronous, hardware-controlled sampling initiation and termination. Its falling edge starts sampling; rising edge ends sampling and begins conversion - independent of SCLK timing. This feature is essential for synchronizing acquisition with external events (e.g., PWM edges) and accommodating high-impedance sensor sources beyond the 1-kΩ limit.

Can the TLV2548CPWRG4 operate with a 3.3-V supply?

Yes, the TLV2548CPWRG4 is fully specified for operation from 2.7 V to 5.5 V, including standard 3.3-V systems. At 3.3 V, typical operating current is 1.0 mA with external reference, and SNDR remains 70 dB at 12 kHz. All digital interface levels (SCLK, SDI, SDO, CS) are 3.3-V compatible without level translation.

What are the key differences between TLV2548CPWRG4 and TLV2544 variants?

The TLV2548CPWRG4 supports 8 analog inputs (A0–A7), while the TLV2544 supports only 4 (A0–A3). The TLV2548CPWRG4 also includes additional CFR bits for extended sweep sequences and FIFO trigger levels. Both share identical core ADC performance, SPI/DSP interface, power-down modes, and package options - but TLV2548CPWRG4 is required for 8-channel applications.