Texas Instruments ADC12062EVAL

Overview

ADC12062EVAL from Texas Instruments is an obsolete evaluation board designed to demonstrate and validate the ADC12062 - a 12-bit, 1 MHz sampling-rate analog-to-digital converter with integrated sample-and-hold and dual-channel analog multiplexer. It operates on a single +5V supply, consumes ≤75 mW during conversion, and delivers ≥69.5 dB SNR at 100 kHz input frequency. The board supports both interrupt- and high-speed interface modes for DSP front-end and instrumentation applications.

For engineers reviewing the ADC12062EVAL datasheet, ADC12062EVAL pinout, ADC12062EVAL application, or ADC12062EVAL equivalent, this page provides verified functional context, interface timing validation, layout guidance for analog/digital grounding, reference voltage configuration (4.096 V), and real-world performance limits including THD degradation above 100 kHz when using the internal multiplexer.

Technical Context

The ADC12062EVAL implements the ADC12062 IC in a fully populated, test-ready configuration with bypass capacitors (0.1 µF ceramic + 10 µF tantalum per supply rail), isolated analog/digital ground planes, and accessible signal paths for VIN1/VIN2, MUX OUT, and ADC IN. It supports both MODE = 1 (interrupt interface) and MODE = 0 (high-speed interface) timing as defined in Figures 18–19 of SNAS084C.

Board-level design enforces TI-recommended layout practices: separate AGND/DGND1/DGND2 routing tied at a single point, low-impedance VREF+(FORCE/SENSE) and VREF−(FORCE/SENSE) connections, and 100 Ω source impedance matching for optimal settling (t_SETTLE ≤ 550 ns to 12 bits). The EVAL board does not include on-board signal conditioning but provides test points for external op-amp buffering (e.g., LM6361) per Figure 27.

Key Specifications

Availability

ADC12062EVAL is available at Aetrix Electronics and suitable for digital signal processor front ends, precision instrumentation, disk drive servo control, and waveform digitizer prototyping requiring stable component supply during legacy system maintenance and obsolescence mitigation.

Supply support for ADC12062EVAL 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 U.S.-based semiconductor company specializing in analog, embedded processing, and high-performance data conversion technologies.

The ADC12062EVAL belongs to TI's legacy precision data acquisition evaluation platform family, engineered to accelerate validation of high-speed, low-power 12-bit ADCs in noise-sensitive mixed-signal systems.

FAQ

What is the primary function of the ADC12062EVAL evaluation board?

The ADC12062EVAL evaluation board is a hardware platform designed exclusively to evaluate the ADC12062 - a 12-bit, 1 MHz analog-to-digital converter with built-in sample-and-hold and dual-channel analog multiplexer. It provides full access to all control signals (S/H, RD, OE, CS, INT, EOC), reference inputs (VREF± FORCE/SENSE), and analog I/O (VIN1, VIN2, MUX OUT, ADC IN), enabling functional verification, timing analysis, and dynamic performance characterization per SNAS084C. The ADC12062EVAL itself contains no active logic beyond passive support circuitry.

Does ADC12062EVAL support both interrupt and high-speed interface modes of the ADC12062?

Yes, ADC12062EVAL fully supports both interface modes specified in the ADC12062 datasheet. Jumper-selectable MODE configuration allows users to operate the onboard ADC12062 in interrupt mode (MODE = 1, using INT and RD handshake) or high-speed mode (MODE = 0, with continuous data bus output and eliminated INT-to-RD delay). All required timing waveforms - including those in Figures 18 and 19 of SNAS084C - are realizable using the ADC12062EVAL's buffered control headers and test points.

What reference voltage configuration is implemented on ADC12062EVAL?

The ADC12062EVAL implements the recommended 4.096 V reference voltage using TI's force/sense topology: VREF+(FORCE) and VREF−(FORCE) connect to the external reference source, while VREF+(SENSE) and VREF−(SENSE) return directly to the ADC12062's internal reference amplifier inputs. This configuration compensates for PCB trace resistance and ensures accurate full-scale coding across temperature. The board includes dedicated pads for 0.1 µF ceramic bypassing on VREF/16 and provision for external 4.096 V reference ICs.

How does ADC12062EVAL address analog and digital grounding per TI's layout recommendations?

ADC12062EVAL follows TI's strict grounding guidelines from SNAS084C: separate copper pours for AGND, DGND1, and DGND2 are routed to a single-point star ground near the ADC12062 package. AVCC and DVCC supplies use independent 0.1 µF ceramic + 10 µF tantalum bypass networks tied locally to their respective ground planes. Signal traces crossing ground splits are minimized, and MUX OUT/ADC IN paths are kept short and shielded from digital switching noise - ensuring validated performance for ≤69.5 dB SNR and ≤−70 dBc THD at 100 kHz.

Is ADC12062EVAL still in production, and what support is available for legacy use?

No - ADC12062EVAL is marked obsolete by Texas Instruments, and the ADC12062 IC itself has been discontinued. However, Aetrix Electronics maintains limited legacy stock with full traceability and provides technical documentation support (SNAS084C Rev. April 2013), schematic review, and application guidance for maintenance, repair, and obsolescence replacement programs. No firmware, drivers, or software tools are included with ADC12062EVAL; it is a hardware-only evaluation platform.