Analog Devices Inc. DC2196A-B

Overview

DC2196A-B from Analog Devices (formerly Linear Technology) is an evaluation board for the LTC2666 octal 16-/12-bit ±10V SoftSpan DAC with integrated 2.5V reference, rail-to-rail output buffers, independently programmable output ranges (0V–5V, 0V–10V, ±2.5V, ±5V, ±10V), and SPI/Microwire interface up to 50MHz. It enables rapid validation of precision analog output in instrumentation and industrial control systems.

For engineers reviewing the DC2196A-B datasheet, DC2196A-B pinout, DC2196A-B application, or DC2196A-B equivalent, this page provides verified hardware configuration details, supported DAC operating modes, on-board reference and supply conditioning, thermal monitoring integration, and direct connection guidance for system-level analog output calibration and multiplexer routing verification.

Technical Context

The DC2196A-B implements full hardware support for the LTC2666's dual-register A/B toggle capability via dedicated TGP pin routing and configurable LDAC/CLR controls. It provides independent V+, V–, VCC, and IOVCC supply regulation with low-noise bypassing, including 1µF ceramic capacitors on V+ and V–, and 0.1µF on IOVCC.

On-board circuitry enables all five SoftSpan output ranges through hardware-selectable MSPAN (MSP0–MSP2) configurations and supports both internal reference (2.5V, 10ppm/°C max) and external reference injection via REF/REFCOMP terminals. The MUXOUT pin is fully accessible for analog multiplexer output monitoring across all eight DAC channels, REFLO, REF, V+, V–, and temperature monitor signals.

Key Specifications

Availability

DC2196A-B is available at Aetrix Electronics and suitable for precision instrumentation, automated test equipment, optical networking control, and industrial process control applications requiring stable component supply and validated DAC evaluation infrastructure.

Supply support for DC2196A-B 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

Analog Devices, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision measurement, control, and connectivity.

The DC2196A-B belongs to Analog Devices' LTC evaluation board family, designed specifically to accelerate prototyping and characterization of high-accuracy, multi-channel DACs in demanding analog output applications where rail-to-rail swing, low INL, and flexible range selection are critical.

FAQ

What is the primary function of the DC2196A-B evaluation board?

The DC2196A-B evaluation board is a fully assembled and tested platform for evaluating the LTC2666 octal 16-/12-bit ±10V SoftSpan DAC. It provides immediate access to all pins, pre-regulated supplies, reference conditioning, thermal monitoring, and MUXOUT routing-enabling engineers to validate DAC performance, configure output ranges, verify SPI communication, and integrate analog outputs into real-world systems without custom PCB design. DC2196A-B directly supports the full feature set of the LTC2666, including A/B toggle, LDAC synchronization, and hardware span selection.

Does the DC2196A-B support both internal and external reference modes for the LTC2666?

Yes, the DC2196A-B fully supports both internal and external reference operation of the LTC2666. The board routes the REF and REFCOMP pins to accessible test points and includes a 0.1µF capacitor on REFCOMP as required for internal reference stability. When the internal reference is disabled (via REFCOMP tied to GND), the REF pin becomes a high-impedance input accepting external references from 0.5V to VCC–1.75V. DC2196A-B's layout preserves low-noise grounding and decoupling essential for <10ppm/°C reference accuracy.

How does the DC2196A-B implement the LTC2666's SoftSpan output range selection?

The DC2196A-B implements SoftSpan range selection via hardware jumpers or solder bridges connecting MSP0, MSP1, and MSP2 pins to VCC or GND-matching Table 4 in the LTC2666 datasheet. These pins determine power-on reset code (zero- or mid-scale) and initial span mode (manual fixed or SoftSpan). DC2196A-B also supports dynamic range reconfiguration via SPI commands, allowing per-channel range updates during operation without hardware changes.

Can the DC2196A-B be used to evaluate the LTC2666's analog multiplexer (MUXOUT) functionality?

Yes, the DC2196A-B provides direct access to the MUXOUT pin and includes circuitry enabling full evaluation of the LTC2666's 8:1 analog multiplexer. Users can route any DAC output (VOUT0–VOUT7), REF, REFLO, V+, V–, or the internal temperature monitor signal to MUXOUT via SPI-controlled register settings. This allows real-time monitoring of multiple analog nodes-including reference stability, supply rail integrity, and thermal behavior-using a single measurement channel. DC2196A-B maintains signal integrity with proper grounding and minimal trace length to MUXOUT.

What thermal protection features are implemented on the DC2196A-B for the LTC2666?

The DC2196A-B implements the LTC2666's OVRTMP thermal interrupt pin with a pull-up resistor and test point access. When die temperature exceeds 160°C, OVRTMP asserts low (open-drain N-channel); the condition clears automatically on the next CS/LD rising edge. DC2196A-B's layout includes thermal vias under the exposed pad (connected to V–) and recommends mounting to a heatsink-capable PCB. This implementation allows users to validate thermal shutdown response timing, integrate overtemperature alerts into host firmware, and correlate OVRTMP assertion with ambient/system thermal conditions. DC2196A-B ensures reliable detection without false triggers via proper noise filtering.