Analog Devices Inc. DC1190A-D

Overview

DC1190A-D from Analog Devices (formerly Linear Technology) is a demonstration board for the LTC2362 - a 500ksps, 12-bit serial successive-approximation ADC in TSOT-23-8 package. It operates from a single 2.35V–3.6V supply, delivers 73dB SNR and 86dB SFDR, and supports external reference (1.4V–VDD) and independent digital output supply (1V–VDD). It is used for high-speed, low-power sensor digitization in portable instrumentation.

For engineers reviewing the DC1190A-D datasheet, DC1190A-D pinout, DC1190A-D application, or DC1190A-D equivalent, this page provides verified hardware interface details, real-world timing behavior, SPI/MICROWIRE™ compatibility confirmation, sleep-mode current validation (0.1μA), and direct guidance on interfacing with MCU/DSP systems requiring sub-2μs throughput and 12-bit precision at 500ksps.

Technical Context

The DC1190A-D implements the LTC2362's native 3-wire serial interface (CONV, SCK, SDO) with precise timing control - supporting minimum 2μs throughput time (t_THROUGHPUT), 1.5μs conversion time (t_CONV), and 0.5μs acquisition time (t_ACQ). Its layout includes dedicated 2.2μF ceramic bypassing on VDD, VREF, and OVDD rails to maintain <0.3ns aperture jitter and preserve 73dB SNR performance up to 248kHz input frequency.

It validates the LTC2362's dual-supply flexibility: analog section powered by VDD (2.35V–3.6V), reference path referenced to VREF (1.4V–VDD), and digital outputs driven by OVDD (1V–VDD), enabling interoperability with 1.8V/2.5V/3.3V logic without level shifters.

Key Specifications

Availability

DC1190A-D is available at Aetrix Electronics and suitable for portable instrumentation, battery-powered data loggers, and compact industrial sensor interfaces requiring stable component supply, rapid evaluation turnaround, and traceable reference design validation.

Supply support for DC1190A-D 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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The DC1190A-D belongs to ADI's Linear Technology legacy evaluation board portfolio, designed specifically to accelerate adoption of ultra-low-power, high-speed SAR ADCs in space-constrained, battery-sensitive applications.

FAQ

What is the primary function of the DC1190A-D evaluation board?

The DC1190A-D evaluation board is a fully assembled and tested hardware platform for evaluating the LTC2362 500ksps, 12-bit SAR ADC. It provides immediate access to all critical signals - including VDD, VREF, OVDD, AIN, CONV, SCK, and SDO - with optimized PCB layout, proper decoupling (2.2μF ceramic caps on each supply), and documented timing compliance. Engineers use DC1190A-D to validate system-level integration, verify SPI timing margins, and characterize dynamic performance before committing to custom PCB design.

Does DC1190A-D support both TSOT-23-6 and TSOT-23-8 variants of the LTC236x family?

No. DC1190A-D is configured exclusively for the LTC2362 in the 8-lead TSOT-23 (TS8) package. It implements the full TS8 pinout - including dedicated VREF and OVDD pins - and does not support the 6-lead S6 variant (which lacks VREF and OVDD and uses VDD as reference). The board's schematic, footprint, and BOM are specific to the TS8 configuration and cannot accommodate S6 devices without hardware modification.

Can DC1190A-D operate with an external reference voltage below 1.4V?

No. DC1190A-D is designed to support the LTC2362's specified VREF range of 1.4V to VDD only. The LTC2362 datasheet explicitly states "VREF range is 1.4V to VDD" (page 3), and operation below 1.4V violates absolute maximum ratings and invalidates INL/DNL, SNR, and THD specifications. DC1190A-D's circuitry and layout assume ≥1.4V reference compliance; using lower voltages risks non-monotonic behavior and missing codes.

How does DC1190A-D demonstrate the LTC2362's sleep-mode power savings?

DC1190A-D validates the LTC2362's 0.1μA typical sleep current (at –40°C to 125°C) by holding CONV high between conversions - automatically powering down the ADC core after each sample. The board's test points allow direct current measurement at VDD, confirming sub-1μA quiescent draw during idle periods. This behavior is observable with any microcontroller driving CONV, and DC1190A-D includes jumper-selectable pull-up/pull-down options to ensure rail-to-rail CONV transitions and avoid leakage-induced current penalties.

Is DC1190A-D compatible with standard Arduino or Raspberry Pi GPIO headers?

No. DC1190A-D uses a 12-pin Samtec TFM series header with 0.05" pitch and non-standard pin assignment optimized for bench testing with oscilloscopes, logic analyzers, and ADI's DC1087B controller board. It does not conform to Arduino Uno R3, Raspberry Pi 40-pin, or other common development board pinouts. Interfacing requires custom cabling or adapter boards; ADI provides no native library or driver support for Arduino/RPi - only for their own Linduino and QuikEval platforms.