Texas Instruments TLV2544QDRG4

Overview

TLV2544QDRG4 from Texas Instruments is a 12-bit, 200-kSPS automotive-grade SAR analog-to-digital converter with built-in reference, internal conversion clock, and 8-word FIFO. It operates from a single 3-V to 5.5-V supply, supports SPI/DSP serial interfaces up to 20 MHz, and delivers ±1.2 LSB differential/integral nonlinearity over −40°C to 125°C. It is used in engine control units for real-time sensor signal digitization under harsh thermal conditions.

For engineers reviewing the TLV2544QDRG4 datasheet, TLV2544QDRG4 pinout, TLV2544QDRG4 application, or TLV2544QDRG4 equivalent, key selection considerations include its Q-temp automotive qualification, programmable sampling period (12/24 SCLK), hardware-controlled CSTART trigger, EOC/INT dual-mode pin, and 4-channel analog multiplexer with internal self-test voltage support.

Technical Context

The TLV2544QDRG4 implements a charge redistribution SAR architecture with break-before-make analog multiplexing across four input channels (A0–A3). Its conversion clock can be sourced from internal OSC, SCLK, SCLK/2, or SCLK/4 - enabling flexible timing 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), all leveraging an 8×12-bit FIFO and configurable interrupt threshold (1/4, 1/2, 3/4, or full). The EOC/INT pin functions as end-of-conversion only in mode 00; in all other modes it operates exclusively as an interrupt output.

Key Specifications

Pinout & Package

TLV2544QDRG4 is housed in a 16-pin SOIC (D package) with gull-wing leads, 1.27-mm pitch, and JEDEC MS-012AC compliance. Pin 1 is marked by a beveled corner; device orientation follows standard SOIC top-view convention.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV2544QDRG4, ADS7822QDGKR trades resolution and features for size/cost, while TLV2548QDW provides direct I/O scalability without altering timing, power, or software architecture - making it the preferred migration path for channel expansion.

Availability

TLV2544QDRG4 is available at Aetrix Electronics and suitable for engine control units, transmission control modules, battery management systems, and ADAS subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV2544QDRG4 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 automotive electronics, with decades of experience in high-reliability signal chain solutions.

The TLV2544QDRG4 belongs to TI's Q-temp automotive ADC family, designed specifically for under-hood and chassis-mounted control modules demanding AEC-Q100 compliance, wide-temperature operation, and robust serial interfacing.

FAQ

What is the maximum sampling rate supported by the TLV2544QDRG4?

The TLV2544QDRG4 achieves a maximum throughput of 200 kSPS. This rate is attainable using the internal oscillator as the conversion clock or by configuring the external SCLK as the clock source (e.g., 20-MHz SCLK with SCLK/4 division yields ~2.8 µs conversion time). Actual sustained rate depends on selected sampling period (12 or 24 SCLKs) and interface overhead.

Does the TLV2544QDRG4 require an external reference voltage?

No, the TLV2544QDRG4 does not require an external reference voltage. It integrates selectable 2-V or 4-V internal references, configurable via the CFR D10 bit. External reference operation is optional and enabled by setting CFR D11 = 0, allowing use of precision external sources when higher accuracy or custom scaling is needed.

How many analog input channels does the TLV2544QDRG4 support?

The TLV2544QDRG4 supports four single-ended analog input channels (A0–A3), as confirmed by its pinout (pins 6–9), functional block diagram, and command set documentation. Unlike the TLV2548Q, it does not implement A4–A7; the TLV2544QDRG4 is explicitly defined as the 4-channel variant in the datasheet's "AVAILABLE OPTIONS" table.

What is the function of the CSTART pin on the TLV2544QDRG4?

The CSTART pin on the TLV2544QDRG4 provides hardware-controlled asynchronous sampling initiation. Its falling edge starts the sampling period, and its rising edge terminates sampling and triggers conversion - independent of SCLK timing. This enables precise synchronization with external events, such as ignition pulses or radar chirps, and accommodates high-impedance sensor sources.

Is the TLV2544QDRG4 pin-compatible with other devices in the TLV254x family?

The TLV2544QDRG4 is not pin-compatible with the TLV2548Q (20-pin DW) or TLV2548M (20-pin FK), due to differing pin counts and channel allocations. However, it shares the same 16-pin SOIC (D) footprint as other TLV2544 variants. Pin mapping matches the TLV2544QD series exactly - including identical placement of SDO, SDI, SCLK, CS, and analog inputs A0–A3.