Texas Instruments TLC0834IDR

Overview

TLC0834IDR from Texas Instruments is a 4-channel, 8-bit successive-approximation analog-to-digital converter (ADC) with serial control interface, ratiometric operation capability, and single 5-V supply support. It delivers ±1 LSB total unadjusted error, 32 µs conversion time at 250 kHz clock, and supports single-ended or differential input configurations for industrial sensor interfacing and embedded data acquisition.

For engineers reviewing the TLC0834IDR datasheet, TLC0834IDR pinout, TLC0834IDR application, or TLC0834IDR equivalent, key selection criteria include its SOIC-14 package, –40°C to 85°C operating temperature range, software-configurable multiplexer addressing, MSB/LSB-first serial output mode, and compatibility with TTL/MOS logic levels in microprocessor-connected systems.

Technical Context

The TLC0834IDR implements a sample-data-comparator architecture with an internal SAR (successive-approximation register) and resistive ladder DAC. Its 4-channel analog multiplexer is controlled via a 3–4-bit serial address word shifted in on DI, enabling channel selection and input polarity assignment (single-ended, differential, or pseudodifferential).

Conversion initiation requires CS low, followed by clocked serial address input; SARS goes high during conversion and low upon completion. Output data appears on DO with MSB-first format, and the device supports bidirectional single-wire interface by leveraging DI/DO timing isolation-DI active only during address setup, DO enabled after multiplexer settling.

Key Specifications

Pinout & Package

TLC0834IDR is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and moisture sensitivity level 1 (260°C peak reflow). Pin 1 orientation follows quadrant Q1 tape-and-reel standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC0834CN and TLC0834CDR, the TLC0834IDR uniquely supports –40°C to 85°C operation while retaining full functional equivalence-making it the sole option among these three for designs requiring industrial-grade thermal resilience without architectural compromise.

Availability

TLC0834IDR is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data acquisition, automotive body electronics, and test & measurement equipment requiring stable component supply across extended temperature ranges.

Supply support for TLC0834IDR 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 with decades of precision data converter expertise.

The TLC0834 product line was designed for cost-sensitive, microprocessor-connected systems needing flexible, serial-controlled analog digitization in space-constrained industrial and automotive applications.

FAQ

What is the operating temperature range specified for the TLC0834IDR?

The TLC0834IDR is characterized for operation from –40°C to +85°C, making it suitable for industrial and automotive environments where ambient temperatures exceed commercial-grade limits. This specification is confirmed in the "Available Options" table and "Recommended Operating Conditions" section of the SLAS094E datasheet. The 'I' suffix explicitly denotes the industrial temperature grade, distinct from the 'C' (commercial) variant.

Does the TLC0834IDR require an external reference voltage, or can it operate ratiometrically?

The TLC0834IDR supports both modes: it can accept an external reference voltage on the REF pin (0–5 V), or operate ratiometrically using VCC as the reference. Ratiometric operation eliminates reference drift errors when the analog sensor output scales with the same supply rail, which is especially valuable in systems with shared 5-V power domains. The device maintains ±1 LSB total unadjusted error in either configuration per datasheet specifications.

How many analog input channels does the TLC0834IDR support, and what input configurations are available?

The TLC0834IDR supports four analog input channels (CH0–CH3) with software-selectable configurations: single-ended, differential (adjacent pairs only, e.g., CH0/CH1), or pseudodifferential. Channel selection and polarity are controlled via a 3–4-bit serial address word shifted in on the DI pin. This flexibility allows noise rejection in differential mode or simplified wiring in single-ended mode-all without changing hardware connections.

What is the maximum clock frequency supported by the TLC0834IDR, and how does it affect conversion time?

The TLC0834IDR supports clock frequencies from 10 kHz to 600 kHz. At the recommended 250 kHz, conversion time is fixed at 32 µs (8 clock periods). Higher clock frequencies reduce conversion time linearly, but timing margins (setup/hold times) must still be met. The datasheet specifies minimum pulse duration and duty-cycle constraints to ensure reliable operation across the full frequency range.

Is the TLC0834IDR pin-compatible with other members of the TLC083x family, such as the TLC0838IDR?

No, the TLC0834IDR is not pin-compatible with the TLC0838IDR. The TLC0834IDR uses a 14-pin SOIC (D) package with four analog inputs, while the TLC0838IDR uses a 20-pin package (DW or PW) with eight analog inputs. Their pinouts differ significantly-e.g., TLC0834IDR has pins 3–6 assigned to CH0–CH3, whereas TLC0838IDR dedicates pins 1–8 to CH0–CH7. Interchangeability requires PCB redesign.