Texas Instruments TLV2553IDW

Overview

TLV2553IDW from Texas Instruments is a 12-bit, 200-KSPS successive-approximation analog-to-digital converter (SAR ADC) with integrated 11-channel analog multiplexer, on-chip sample-and-hold, and SPI-compatible serial interface. It operates from 2.7 V to 5.5 V, delivers ±1 LSB INL/DNL, and supports unipolar/bipolar output modes in industrial temperature range (–40°C to 85°C), enabling precision data acquisition in portable instrumentation.

For engineers reviewing the TLV2553IDW datasheet, TLV2553IDW pinout, TLV2553IDW application, or TLV2553IDW equivalent, key selection criteria include its 11 multiplexed analog inputs, programmable MSB/LSB-first output, self-test capability, and low-power operation down to 0.1 µA in software power-down mode.

Technical Context

The TLV2553IDW implements a switched-capacitor SAR architecture with differential high-impedance reference inputs (REF+, REF–) supporting ratiometric conversion. Its internal oscillator (2.56–4.15 MHz) eliminates external clock requirements, and conversion timing is fully synchronized to the I/O CLOCK signal with configurable 8-/12-/16-bit transfer formats.

Control logic accepts 4-bit address/command via DATA IN to select one of 11 analog inputs (AIN0–AIN10) or three internal self-test voltages. The EOC pin asserts low upon conversion completion, and DATA OUT shifts out 12-bit results with programmable bit order while simultaneously accepting the next channel address-enabling pipelined operation.

Key Specifications

Pinout & Package

TLV2553IDW is housed in a 20-pin SOIC package (12.80 mm × 7.50 mm), optimized for through-hole and surface-mount assembly in industrial control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and TLV2548IDW, the TLV2553IDW uniquely combines 11-channel multiplexing, on-chip oscillator, and three-point self-test in a single SOIC-20 package - making it optimal for portable, self-validating, high-channel-count data acquisition where board area and diagnostic coverage are constrained.

Availability

TLV2553IDW is available at Aetrix Electronics and suitable for process control, portable data logging, and battery-powered instruments requiring stable component supply across extended product lifecycles.

Supply support for TLV2553IDW 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TLV2553IDW belongs to TI's low-power precision data acquisition portfolio, designed specifically for battery-operated and space-constrained measurement systems needing integrated multiplexing, self-test, and minimal external components.

FAQ

What is the maximum sampling rate of the TLV2553IDW under 3-V operation?

The TLV2553IDW achieves up to 150 KSPS when operated at VCC = 3 V with I/O CLOCK frequency set to 10 MHz. This throughput is specified in the Recommended Operating Conditions table and verified across the full –40°C to 85°C temperature range, ensuring reliable performance in battery-powered instrumentation where supply voltage may sag during discharge cycles. The TLV2553IDW maintains its 12-bit resolution and ±1 LSB linearity at this rate.

Does the TLV2553IDW require an external clock source?

No, the TLV2553IDW does not require an external clock source because it incorporates an on-chip oscillator operating at 2.56 MHz (at 2.7 V) to 4.15 MHz (at 5.5 V). This internal clock drives the SAR conversion process, allowing the device to function with only the externally supplied I/O CLOCK for serial interface timing. The TLV2553IDW thus reduces system component count and layout complexity compared to ADCs requiring external crystals or clock generators.

How many analog input channels does the TLV2553IDW support, and what is their configuration?

The TLV2553IDW supports 11 single-ended analog input channels labeled AIN0 through AIN10. These are internally multiplexed using a 4-bit address register, allowing sequential or random access to any channel via the DATA IN serial interface. The TLV2553IDW does not support differential input pairs natively; all inputs are referenced to the device's analog ground (GND) unless configured for bipolar operation using REF–.

What self-test capabilities does the TLV2553IDW provide, and how are they activated?

The TLV2553IDW provides three built-in self-test modes that generate known digital output codes: 0 (all zeros), 2048 (mid-scale), and 4095 (all ones). These are selected by writing specific 4-bit address values (1100b, 1011b, and 1101b respectively) to the configuration register via DATA IN. Activation occurs automatically during the next conversion cycle, enabling firmware-based diagnostics without external test equipment. This capability is documented in the TLV2553IDW datasheet Section 3 and Table 2.

Is the TLV2553IDW pin-compatible with other devices in the TLV25xx family?

The TLV2553IDW is not pin-compatible with most other TLV25xx-family devices due to differences in channel count, feature set, and pin assignments. For example, the TLV2548IDW (8-channel) uses identical SOIC-20 packaging but assigns different functions to pins 11 and 12, and omits the EOC signal entirely. Engineers must consult the individual pin configuration tables for each variant; direct PCB replacement of TLV2553IDW with another TLV25xx part is not supported without layout revision.