Texas Instruments TLV2548IPWG4

Overview

TLV2548IPWG4 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 serial interfaces up to 20 MHz, and features differential nonlinearity of ±1 LSB and 70 dB SNDR at 12 kHz - used in industrial data acquisition systems requiring high-resolution sampling with low-power operation.

For engineers reviewing the TLV2548IPWG4 datasheet, TLV2548IPWG4 pinout, TLV2548IPWG4 application, or TLV2548IPWG4 equivalent, this page delivers verified electrical parameters, validated 20-pin TSSOP package mapping, confirmed 8-channel analog multiplexer behavior, real-world timing constraints for CSTART-triggered extended sampling, and two manufacturer-validated alternative parts with documented functional and interface differences.

Technical Context

The TLV2548IPWG4 implements a charge redistribution SAR architecture with break-before-make analog multiplexer supporting eight single-ended inputs or internal self-test voltages. Its configurable sampling period (12 or 24 SCLKs) and asynchronous CSTART control enable precise acquisition from high-impedance sources up to 500 kHz analog bandwidth.

Conversion clock options include internal oscillator, SCLK, SCLK/2, or SCLK/4 - enabling conversion times as fast as 3.86 µs (with internal OSC) or scalable to match host processor timing. The device supports four conversion modes (one-shot, repeat, sweep, repeat-sweep), all using the same 12-bit configuration register (CFR) with programmable FIFO trigger thresholds and EOC/INT pin function selection.

Key Specifications

Pinout & Package

TLV2548IPWG4 is packaged in a 20-pin TSSOP (PW) with 0.65-mm pitch, RoHS-compliant, and rated for −40°C to +85°C operation. Pin functions are electrically validated per TI SLAS198E datasheet Rev. JUNE 2003.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2548IPWG4, ADS7822U trades resolution and FIFO capability for lower cost and smaller footprint, while TLV2544IPW retains full architectural compatibility but halves channel count - both require PCB layout changes due to different pin counts and package sizes.

Availability

TLV2548IPWG4 is available at Aetrix Electronics and suitable for industrial sensor monitoring, motor control feedback, portable data loggers, test & measurement equipment, and embedded data acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for TLV2548IPWG4 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 - serving industrial, automotive, and communications markets since 1930.

The TLV2548IPWG4 belongs to TI's precision data acquisition portfolio, designed specifically for low-power, high-resolution industrial sensing and control applications where integrated reference, FIFO, and flexible sampling control reduce system complexity.

FAQ

What is the maximum sampling rate supported by the TLV2548IPWG4?

The TLV2548IPWG4 achieves a maximum throughput of 200 KSPS when using the internal oscillator as the conversion clock source and operating with optimal timing conditions. This rate is sustained across its full 12-bit resolution and specified temperature range (−40°C to +85°C). At higher SCLK frequencies (up to 20 MHz), conversion time scales with the selected clock divider (SCLK/2 or SCLK/4), making actual throughput dependent on configuration - the 200-KSPS figure reflects worst-case timing under guaranteed specifications.

Does the TLV2548IPWG4 support external reference voltage?

Yes, the TLV2548IPWG4 supports external reference voltage applied between REFP and REFM pins. When configured via bit D11 of the Configuration Register (CFR), the device disables its internal 2-V or 4-V reference and uses the external differential reference. The analog input range becomes 0 V to (V_REFP − V_REFM), and REFM must be decoupled with 10-µF and 0.1-µF capacitors to ground. Internal reference operation requires tying REFM to analog ground.

How does the CSTART pin function in the TLV2548IPWG4?

The CSTART pin provides hardware-controlled, asynchronous sampling initiation in the TLV2548IPWG4. A falling edge starts the sampling period; the low time determines acquisition duration, and the rising edge terminates sampling and triggers conversion. This mode operates independently of SCLK and is especially valuable for high-impedance sources (>1 kΩ) or variable sampling windows. CSTART is valid only when internal reference is selected and in repeat/sweep conversion modes (CFR D[6,5] = 01, 10, or 11).

What are the key differences between TLV2548IPWG4 and TLV2544IPW?

The TLV2548IPWG4 integrates eight analog input channels (A0–A7), while the TLV2544IPW provides only four (A0–A3). Both share identical architecture, resolution, timing, and interface features - including FIFO, CSTART, and conversion modes - but differ in pin count (20 vs. 16), package (TSSOP-20 vs. TSSOP-16), and sweep sequence definitions. They are not pin-compatible, and substituting one for the other requires PCB redesign and firmware adaptation to channel mapping.

Can the TLV2548IPWG4 operate with a 3.3-V supply and still achieve full 12-bit performance?

Yes, the TLV2548IPWG4 is fully specified for operation at 3.3 V, delivering its complete 12-bit performance including ±1 LSB DNL, 70 dB SNDR, and 200-KSPS throughput. Power consumption is 1.0 mA typical at 3.3 V with external reference, and the analog input range remains 0 V to 3.3 V. All timing parameters, reference accuracy, and FIFO functionality are guaranteed across the entire 2.7–5.5 V supply range per the SLAS198E datasheet.