Texas Instruments TLC0831IP

Overview

TLC0831IP from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter (ADC) with single-ended differential input capability, serial control interface, and operation over –40°C to +85°C. It features 32 µs conversion time at 250 kHz clock, ±1 LSB total unadjusted error, and ratiometric operation using a 5-V reference or V_CC. It is used in industrial sensor signal conditioning where compact serial ADCs interface directly with microcontrollers.

For engineers reviewing the TLC0831IP datasheet, TLC0831IP pinout, TLC0831IP application, or TLC0831IP equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options - all grounded in TI's SLAS107B specification and production data.

Technical Context

The TLC0831IP implements a sample-data-comparator architecture with internal SAR logic and resistive ladder DAC. Conversion is initiated by CS low, followed by eight clock cycles delivering MSB-first serial output on DO. Input is applied differentially between IN+ and IN– or single-ended with IN– grounded.

It operates ratiometrically when REF = V_CC, enabling full 8-bit resolution across 0–5 V input range with single 5-V supply. Inputs and outputs are TTL/MOS compatible, and the device supports standalone operation without external address decoding logic.

Key Specifications

Pinout & Package

Package: PDIP (Plastic Dual In-line Package), 8-pin, through-hole mounting. RoHS-compliant NIPDAU lead finish, no MSL restriction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC0831CN/NOPB, TLC0831IP offers identical performance in a through-hole package ideal for lab validation and repair; compared with TLC0831CD, it trades mountability and density for mechanical robustness and socket compatibility in harsh environments.

Availability

TLC0831IP is available at Aetrix Electronics and suitable for industrial temperature monitoring, automotive cabin sensing, legacy panel meter upgrades, and embedded power supply feedback requiring stable component supply across extended temperature ranges.

Supply support for TLC0831IP 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 expertise in precision data converters and industrial-grade ICs.

The TLC0831IP belongs to TI's legacy 8-bit serial ADC family designed for cost-sensitive, space-constrained industrial and automotive subsystems requiring reliable ratiometric conversion without complex interface logic.

FAQ

What is the maximum clock frequency supported by the TLC0831IP?

The TLC0831IP supports clock frequencies from 10 kHz to 600 kHz per TI's recommended operating conditions. At 600 kHz, conversion completes in ≤32 µs (8 clock periods), but system-level timing margins must account for setup/hold times (tsu = 350 ns, th = 90 ns) and propagation delays. For robust operation across –40°C to +85°C, 250 kHz is the validated nominal frequency used in all electrical characteristics tables for TLC0831IP.

Can the TLC0831IP operate without an external reference voltage?

Yes, the TLC0831IP can operate without an external reference. When the REF pin is left unconnected, it internally biases to V_CC, enabling ratiometric conversion where the full-scale digital output corresponds to the applied V_CC value. This configuration is explicitly supported and characterized in the datasheet, making the TLC0831IP suitable for systems where V_CC is stable and serves as the sensor excitation source.

Is the TLC0831IP pin-compatible with the ADC0831?

Yes, the TLC0831IP is designed to be interchangeable with the National Semiconductor ADC0831, including identical pinout, electrical specifications, timing behavior, and functional operation. TI's datasheet states this explicitly in the "Designed to Be Interchangeable With National Semiconductor ADC0831" section, confirming drop-in compatibility for both PDIP-8 packages across temperature grades.

What is the input impedance seen at the IN+ and IN– pins of the TLC0831IP?

The TLC0831IP does not specify a static input resistance for IN+ and IN– in its datasheet. Instead, the analog input behaves as a switched-capacitor network during conversion. The effective input impedance is dynamic and depends on sampling frequency and internal capacitor size. For DC or low-frequency signals, external buffering is recommended; the device's common-mode input voltage range is –0.05 V to V_CC + 0.05 V, and input protection diodes conduct if voltage exceeds V_CC by >50 mV.

Does the TLC0831IP support differential input mode?

Yes, the TLC0831IP supports true differential input mode between IN+ and IN– pins. Unlike the TLC0832, it has fixed polarity (IN+ = positive, IN– = negative) and no software-configurable channel selection. When a differential signal is applied, the output code represents the signed difference (IN+ – IN–) scaled to 0–255. If IN+ < IN–, the output is 0x00. This mode provides common-mode rejection and offset cancellation for noisy industrial environments.