Texas Instruments ADC0831CCN

Overview

ADC0831CCN from Texas Instruments is an 8-bit successive-approximation analog-to-digital converter with single differential input, serial MICROWIRE-compatible interface, ±1 LSB total unadjusted error, 5 VDC single supply operation, and 32 μs conversion time. It serves as a compact, low-power ADC for embedded sensor signal conditioning in industrial monitoring systems.

For engineers reviewing the ADC0831CCN datasheet, ADC0831CCN pinout, ADC0831CCN application, or ADC0831CCN equivalent, key selection considerations include its fixed single-differential input architecture, absence of MUX addressing logic, 8-pin PDIP package, and compatibility with COPS-family microcontrollers via 3-wire serial I/O.

Technical Context

The ADC0831CCN implements a sample-data comparator structure optimized for differential voltage measurement between two dedicated analog inputs (VIN(+) and VIN(−)), with no internal multiplexer control logic. Its conversion sequence begins on CS assertion and requires only a start bit-no address bits-due to its fixed single-channel configuration.

It uses an internal resistor ladder and successive approximation register (SAR) to generate 8-bit output data MSB-first on the DO line, synchronized to external clock edges. The SAR status line goes high during conversion and returns low upon completion, with automatic ½-clock settling interval before data output begins.

Key Specifications

Pinout & Package

ADC0831CCN is housed in an 8-pin plastic dual in-line package (PDIP), 0.3 inch width, with through-hole mounting. Pin functions are validated per TI SNAS531B Figure 4 and Figure 6 (SOIC variant confirms identical pin mapping).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADC0832CCN, ADC0831CCN eliminates MUX address overhead and reduces firmware complexity for fixed-input systems; compared with ADS7816U, it trades resolution and speed for integrated reference handling, lower system cost, and simpler layout.

Availability

ADC0831CCN is available at Aetrix Electronics and suitable for industrial monitoring, motor control, legacy microcontroller interfacing, and low-power sensor node applications requiring stable component supply and long-term obsolescence management.

Supply support for ADC0831CCN 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 over 50 years of innovation in data conversion and industrial IC design.

The ADC0831CCN belongs to TI's legacy 8-bit serial ADC family designed for cost-effective, low-pin-count analog digitization in resource-constrained embedded systems where simplicity, reliability, and ease of integration are prioritized over high speed or multi-channel flexibility.

FAQ

What is the maximum clock frequency supported by the ADC0831CCN?

The ADC0831CCN supports a maximum clock frequency of 400 kHz, as specified in its AC characteristics table. At this rate, conversion time reduces to approximately 20 μs. However, the typical operating condition uses a 250 kHz clock, yielding the documented 32 μs conversion time. Exceeding 400 kHz may cause timing violations and invalid output codes.

Does the ADC0831CCN require an external voltage reference?

No, the ADC0831CCN does not require an external voltage reference. It supports ratiometric operation where VREF is internally tied to VCC, enabling direct connection to the 5 V supply rail. This eliminates external reference components and simplifies design for applications where absolute accuracy is not critical.

Can the ADC0831CCN perform single-ended conversions?

Yes, the ADC0831CCN can perform single-ended conversions by connecting VIN(−) to analog ground (GND). Since COM is internally connected to GND, this configuration establishes a true ground-referenced input at VIN(+), delivering full 0–5 V range digitization with the same 8-bit resolution and ±1 LSB error specification.

What is the purpose of the V+ pin on the ADC0831CCN?

The V+ pin on the ADC0831CCN connects to an internal 6.3–8.5 V zener diode used as a shunt regulator. When driven with a higher-voltage supply (e.g., 12 V), a current-limiting resistor allows the device to regulate its own VCC rail, enabling operation from supplies exceeding the 6.5 V absolute maximum rating of VCC while maintaining functional integrity.

Is the ADC0831CCN pin-compatible with other members of the ADC083x family?

No, the ADC0831CCN is not pin-compatible with ADC0832CCN, ADC0834CCN, or ADC0838CCN. Although all share the 8-pin PDIP package option, pin functions differ: ADC0831CCN uses PIN 3 as VIN(−), while ADC0832CCN assigns PIN 3 to ADD0 (address bit). Direct substitution would cause incorrect analog routing and communication failure.