Analog Devices Inc. LTC2327CMS-16#TRPBF

Overview

LTC2327CMS-16#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with pseudo-differential inputs and true bipolar ±10.24V input range. It operates from a single 5V supply, integrates a low-drift 2.048V internal reference and reference buffer, and delivers 93.5dB SNR and ±1.5LSB INL max - ideal for high-voltage industrial data acquisition requiring wide dynamic range and precision.

For engineers reviewing the LTC2327CMS-16#TRPBF datasheet, LTC2327CMS-16#TRPBF pinout, LTC2327CMS-16#TRPBF application, or LTC2327CMS-16#TRPBF equivalent, key selection considerations include guaranteed 16-bit no-missing-codes operation, SPI-compatible daisy-chain interface supporting 1.8V–5V I/O, internal conversion clock, nap/sleep power management (36mW typical / 300μW sleep), and operation up to 125°C in the MSOP-16 package.

Technical Context

The LTC2327CMS-16#TRPBF implements a charge-redistribution SAR architecture with a 16-bit CDAC and differential comparator. Its pseudo-differential input stage uses resistor divider networks (2kΩ total impedance) to level-shift ±2.5×REFBUF signals into the ADC core's 0–REFBUF range, enabling true bipolar operation without external signal conditioning.

Conversion is initiated by a rising edge on CNV; the internal oscillator eliminates external timing dependencies. The device supports two operational modes - normal (RDL/SDI as bus enable) and daisy-chain (RDL/SDI as serial data input) - controlled by the CHAIN pin, with SDO outputting 2's complement data MSB-first on SCK rising edges.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (3mm × 4.9mm, 0.5mm pitch), RoHS-compliant, tape-and-reel (TRPBF suffix). Thermal resistance θ_JA = 110°C/W; T_JMAX = 150°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-speed SAR ADC applications.

Compared with ADS8860IDRCT and AD7960BCPZ-RL7, the LTC2327CMS-16#TRPBF uniquely combines integrated ±10.24V bipolar input, on-chip 2.048V reference + buffer, SPI daisy-chain capability, and 36mW power at 500ksps - reducing BOM count, layout risk, and qualification effort for industrial DAQ systems.

Availability

LTC2327CMS-16#TRPBF is available at Aetrix Electronics and suitable for programmable logic controllers, industrial process control systems, and high-speed data acquisition requiring stable component supply, long-term lifecycle support, and guaranteed performance across –40°C to +125°C.

Supply support for LTC2327CMS-16#TRPBF 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 leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.

The LTC2327-16 belongs to ADI's precision SAR ADC product line, designed specifically for industrial, instrumentation, and automated test equipment applications demanding true bipolar input, low power, and guaranteed 16-bit no-missing-codes performance without external support components.

FAQ

What is the maximum operating temperature for the LTC2327CMS-16#TRPBF?

The LTC2327CMS-16#TRPBF is rated for operation from 0°C to 70°C (C-grade), as indicated by the "CMS" suffix in the part number. This is distinct from the I-grade (–40°C to +85°C) and H-grade (–40°C to +125°C) variants. The absolute maximum junction temperature is 150°C, and thermal design must ensure θ_JA = 110°C/W does not cause derating under continuous 500ksps operation at elevated ambient temperatures.

Does the LTC2327CMS-16#TRPBF require an external reference?

No, the LTC2327CMS-16#TRPBF includes a factory-trimmed 2.048V internal bandgap reference and a 2× gain reference buffer delivering 4.096V at REFBUF - sufficient to support the standard ±10.24V input range. An external reference is optional and used only to improve accuracy or drift (e.g., overdriving REFIN with LTC6655-2.048) or to extend input range (e.g., overdriving REFBUF to 5V for ±12.5V).

How does the daisy-chain mode work on the LTC2327CMS-16#TRPBF?

In daisy-chain mode (CHAIN pin = high), the LTC2327CMS-16#TRPBF accepts serial data on RDL/SDI and shifts its own 16-bit result out on SDO, allowing multiple devices to share one SCK line. Each device clocks its result into the next, enabling synchronized sampling across channels with minimal GPIO usage - critical for phase-coherent multi-channel acquisition without FPGA-based timing alignment.

What is the power consumption of the LTC2327CMS-16#TRPBF during active conversion?

At 500ksps with VDD = 5V and OVDD = 2.5V, the LTC2327CMS-16#TRPBF draws 11.4mA from VDD and 7.2mA from OVDD, totaling 18.6mA - resulting in 36mW typical power dissipation. Power scales linearly with sampling rate due to automatic nap mode; at 100ksps, total current drops to ~7.2mA (VDD + OVDD), reducing power to ~14mW.

Can the LTC2327CMS-16#TRPBF interface directly with a 1.8V microcontroller?

Yes - the LTC2327CMS-16#TRPBF supports 1.8V logic levels via its OVDD pin, which accepts 1.71V to 5.25V. When OVDD = 1.8V, VIH = 1.44V (min) and VIL = 0.36V (max), ensuring reliable communication with 1.8V MCUs. The SDO output drives to OVDD – 0.2V (high) and 0.2V (low), meeting standard CMOS input thresholds without level shifters.