Texas Instruments TLV0838IDW

Overview

TLV0838IDW from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with integrated 8-channel multiplexer, serial interface, and operation from 2.7 V to 3.6 V. It supports single-ended, differential, and pseudodifferential input configurations, delivers ±1 LSB total unadjusted error, and achieves 32 µs conversion time at 250 kHz clock-used in industrial sensor signal conditioning and embedded data acquisition systems.

For engineers reviewing the TLV0838IDW datasheet, TLV0838IDW pinout, TLV0838IDW application, or TLV0838IDW equivalent, key selection considerations include its −40°C to +85°C industrial temperature rating, SOIC-20 (DW) package, ratiometric reference capability, software-configurable channel addressing, and compatibility with TTL/MOS logic levels.

Technical Context

The TLV0838IDW implements a sample-data-comparator architecture with a successive-approximation register (SAR) core. Its 8-channel analog multiplexer is controlled via a 3–4-bit serial address word shifted in through DI, enabling dynamic selection of input mode (single-ended/differential/pseudodifferential) and polarity assignment per channel pair.

Conversion initiation requires CS low, followed by clocked serial addressing; SARS goes high during conversion and DO outputs MSB-first data after one-clock settling delay. The device operates ratiometrically using VCC as reference or accepts an external REF voltage, supporting full-scale encoding of arbitrary analog spans across its 0 V to VCC input range.

Key Specifications

Pinout & Package

TLV0838IDW is housed in a 20-pin SOIC (DW) package with 0.300-inch body width and standard JEDEC outline. Pin spacing is 0.050 inch (1.27 mm), compatible with automated assembly and standard PCB footprints.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog-to-digital conversion applications.

Compared with TLV0838IPW, TLV0838IDW offers identical performance in a wider SOIC package better suited for manual prototyping and higher-vibration environments; versus ADC0838CCN, TLV0838IDW enables direct 3-V operation and extended temperature support but lacks integrated voltage regulation.

Availability

TLV0838IDW is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and portable diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV0838IDW 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 power management technologies with decades of ADC innovation.

The TLV0838IDW belongs to TI's low-voltage precision ADC family designed for cost-sensitive, space-constrained industrial and automotive signal acquisition where 3-V operation, serial interface simplicity, and wide temperature tolerance are critical.

FAQ

What is the operating temperature range of the TLV0838IDW?

The TLV0838IDW is specified for operation from −40°C to +85°C, making it suitable for industrial control cabinets, automotive under-hood modules, and outdoor environmental monitoring equipment. This rating is confirmed in the "recommended operating conditions" table of the SLAS147B datasheet and applies specifically to the TLV0838IDW variant with the 'I' temperature suffix and DW package.

Does the TLV0838IDW require an external reference voltage?

No-the TLV0838IDW supports ratiometric operation using VCC as its reference, eliminating the need for an external reference in many applications. However, it also accepts an external voltage on the REF pin to encode smaller analog spans with full 8-bit resolution. The input resistance at REF is 1.3–5.9 kΩ, and the device functions correctly with REF tied to VCC or a precision source.

How does the SE pin affect data output format on the TLV0838IDW?

The SE (Start/End) pin on the TLV0838IDW controls serial data output order: when SE is high, DO outputs MSB-first; when SE is pulled low before conversion, DO outputs LSB-first. This dual-mode capability allows the TLV0838IDW to interface seamlessly with microcontrollers that expect either bit order without firmware modification or external logic.

Can the TLV0838IDW perform differential measurements between non-adjacent channels?

No-the TLV0838IDW only supports differential measurements between adjacent channel pairs (e.g., CH0–CH1, CH2–CH3). The functional description explicitly states that "differential inputs are assigned to adjacent channel pairs" and "these channels cannot act differentially with any other channel." For non-adjacent differential sensing, external signal conditioning or a different ADC architecture is required.

What is the maximum clock frequency supported by the TLV0838IDW at 3.3 V supply?

At VCC = 3.3 V, the TLV0838IDW supports a maximum clock frequency of 600 kHz, as specified in the "recommended operating conditions" table. At this rate, conversion time remains eight clock periods (tc = 8 clock periods), yielding a theoretical minimum conversion time of ~13.3 µs-though timing margins for setup/hold and MUX settling must be verified per Figure 1 and Figure 2 in the datasheet.