Texas Instruments TLC0834CDRG4

Overview

TLC0834CDRG4 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 sensor signal digitization in embedded data acquisition systems.

For engineers reviewing the TLC0834CDRG4 datasheet, TLC0834CDRG4 pinout, TLC0834CDRG4 application, or TLC0834CDRG4 equivalent, key selection considerations include its SOIC-14 package, 0°C to 70°C operating range, software-configurable multiplexer addressing, MSB/LSB-first serial output mode, and compatibility with TTL/MOS logic levels.

Technical Context

The TLC0834CDRG4 implements a sample-data-comparator architecture with an internal 8-bit SAR core and 4-channel analog multiplexer controlled via 4-bit serial address words. Its serial interface uses CS, CLK, DI, and DO lines to configure channel selection, input polarity (SGL/DIF), and output data format without parallel bus overhead.

Conversion begins on CS low assertion and completes in exactly eight clock cycles after multiplexer settling; SARS output signals active conversion state. The device accepts 0–5 V analog inputs with 5-V reference, operates ratiometrically, and features high-impedance DO/SARS outputs that enter tri-state when CS goes high.

Key Specifications

Pinout & Package

Package: SOIC-14 (D package), 14-pin small-outline integrated circuit with gull-wing leads, RoHS-compliant NIPDAU finish, MSL Level-1 rating, and 0°C to 70°C temperature grade.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial ADC applications.

Compared with ADC0834CN and TLC0834IDR, the TLC0834CDRG4 provides optimal cost-performance balance for commercial-temperature applications requiring external reference flexibility and minimal power draw, while avoiding Zener-related thermal drift or over-spec temperature grading.

Availability

TLC0834CDRG4 is available at Aetrix Electronics and suitable for industrial sensor interface, embedded data logging, automotive cabin control, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.

Supply support for TLC0834CDRG4 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 innovation.

The TLC0834 product line was designed for cost-sensitive, microprocessor-based systems needing flexible, serial-interface ADCs with multiplexed analog inputs and minimal external components.

FAQ

What is the maximum clock frequency supported by the TLC0834CDRG4?

The TLC0834CDRG4 supports a clock frequency range of 10 kHz to 600 kHz per its recommended operating conditions. At 600 kHz, conversion completes in 13.3 µs (8 clock periods), but timing margins for setup/hold and propagation delay must be verified against load capacitance and microcontroller drive strength. The typical 250 kHz clock yields a guaranteed 32 µs conversion time.

Does the TLC0834CDRG4 require an external reference voltage?

Yes, the TLC0834CDRG4 requires an external reference voltage applied to the REF pin to define its full-scale input range. It does not contain an internal reference or Zener regulator-unlike the functionally similar ADC0834-so a stable 0–5 V reference source must be provided. Ratiometric operation allows the reference to track the VCC rail for sensor applications where excitation and measurement share the same supply.

How is differential input configured on the TLC0834CDRG4?

Differential input on the TLC0834CDRG4 is configured via the 4-bit serial address word sent on the DI line during CS low. Adjacent channel pairs (CH0/CH1 and CH2/CH3) support differential mode, with polarity assigned by the ODD/EVEN and SGL/DIF bits. For example, setting SGL/DIF = H and ODD/EVEN = L selects CH0(+) and CH1(–); the converter then outputs the 2's complement difference between them as an 8-bit code.

Can the TLC0834CDRG4 operate with a 3.3-V microcontroller interface?

Yes, the TLC0834CDRG4 digital I/O pins (CS, CLK, DI, DO, SARS) are compatible with 3.3-V logic when VCC = 5 V, as VIH(min) = 2.0 V and VIL(max) = 0.8 V per electrical characteristics. However, DO and SARS are open-drain outputs referenced to VCC, so external pull-ups to 3.3 V are required for safe interfacing. Direct connection without level translation risks overstressing the 3.3-V controller's input protection diodes.

What is the purpose of the NC pin on the TLC0834CDRG4 SOIC-14 package?

Pin 1 of the TLC0834CDRG4 SOIC-14 package is designated NC (No internal connection). It has no electrical function and must remain unconnected on the PCB. Routing traces to or placing vias near this pin may introduce parasitic capacitance or mechanical stress; TI's package drawing explicitly prohibits soldering or bonding to this terminal to ensure signal integrity and long-term reliability.