Texas Instruments TLC0820AIN

Overview

TLC0820AIN from Texas Instruments is an Advanced LinCMOS™ 8-bit analog-to-digital converter using modified flash architecture, delivering 1.18 µs conversion time, ±1 LSB total unadjusted error, and differential reference inputs. It operates from a single 5-V supply, integrates on-chip track-and-hold with 100-ns sample window, and supports parallel microprocessor interface for real-time data acquisition in industrial control systems.

For engineers reviewing the TLC0820AIN datasheet, TLC0820AIN pinout, TLC0820AIN application, or TLC0820AIN equivalent, this page provides verified technical context, validated pin functions, confirmed operating modes (read/write-read), exact package mapping to PDIP-20, and two documented alternative parts with functional and application-level distinctions.

Technical Context

The TLC0820AIN employs a dual 4-bit flash ADC architecture with internal 4-bit DAC and summing amplifier to achieve full 8-bit resolution without external clocking. Its modified flash technique enables high-speed conversion while maintaining low power consumption via silicon-gate LinCMOS process technology.

It supports two distinct interface modes: read-only mode (MODE = low) with WR/RDY as ready output, and write-read mode (MODE = high) with WR/RDY as write trigger. Conversion timing is deterministic-1.6–2.5 µs in read mode, with interrupt-driven data availability via INT and overflow flag OFLW for cascaded multi-bit extension.

Key Specifications

Pinout & Package

Package: PDIP-20 (Plastic Dual In-line Package), 0.3-inch body width, through-hole mounting compatible with standard 0.1-inch grid PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC0820CC and AD7820K, the TLC0820AIN offers faster conversion (1.18 µs vs. ≥10 µs), integrated track-and-hold, OFLW support for resolution extension, and lower power-making it superior for new industrial and embedded designs demanding speed, simplicity, and scalability.

Availability

TLC0820AIN is available at Aetrix Electronics and suitable for industrial data acquisition, motor control feedback, and test equipment requiring stable component supply with long-term manufacturability and RoHS-compliant sourcing.

Supply support for TLC0820AIN 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 logic technologies with decades of precision data converter innovation.

The TLC0820AIN belongs to TI's legacy LinCMOS™ ADC family, designed specifically for high-speed, low-power, microprocessor-centric data acquisition in industrial and instrumentation applications where parallel interface simplicity and deterministic timing are critical.

FAQ

What is the maximum analog input slew rate supported by the TLC0820AIN?

The TLC0820AIN supports analog input signals with slew rates up to 100 mV/µs due to its integrated track-and-hold circuit with a 100-ns sample window. This specification is explicitly confirmed in the datasheet's "Principles of Operation" section and eliminates the need for external sample-and-hold components when digitizing fast-changing signals within the device's operating range.

Does the TLC0820AIN require an external clock or oscillator?

No, the TLC0820AIN does not require an external clock or oscillator. Its modified flash architecture is fully self-timed, with internal logic controlling conversion sequencing. The datasheet states "No External Clock or Oscillator Components Required" under key features, and timing parameters like tconv(R) and td(int) are defined independently of any external timing source.

How does the MODE pin affect interface behavior in the TLC0820AIN?

The MODE pin selects between two hardware-defined interface modes: when MODE is low, the device operates in read-only mode with WR/RDY functioning as an open-drain ready output; when MODE is high, it enters write-read mode where WR/RDY acts as a write strobe. This dual-mode capability is documented in the "Principles of Operation" and "Terminal Functions" sections of the SLAS064A datasheet.

Can the TLC0820AIN be used in cascaded configurations for higher resolution?

Yes, the TLC0820AIN supports cascading via its OFLW (overflow) pin to achieve 9-bit or 10-bit resolution. When the analog input exceeds REF+, OFLW goes low, signaling the next stage to adjust its reference or shift its code. Figure 6 in the datasheet illustrates a 9-bit configuration using two TLC0820AIN devices, confirming this capability is inherent to the part's architecture.

What is the operating temperature range for the TLC0820AIN?

The TLC0820AIN is rated for operation from –40°C to +85°C, as specified in the "Recommended Operating Conditions" table of the SLAS064A datasheet. This industrial-grade temperature range is distinct from the TLC0820AC variant (0°C to 70°C) and is confirmed by the "AVAILABLE OPTIONS" table listing TLC0820AIN under the –40°C to 85°C row.