Analog Devices Inc. LTC2377IMS-20#TRPBF

Overview

LTC2377IMS-20#TRPBF from Analog Devices (formerly Linear Technology) is a 20-bit, 500ksps successive approximation register (SAR) analog-to-digital converter with ±0.5ppm typical INL, 104dB SNR at 2kHz, and digital gain compression (DGC) for single-supply amplifier interfacing. It operates from a 2.5V VDD supply, supports ±VREF fully differential input up to ±5.1V, and targets high-precision data acquisition in medical imaging and portable instrumentation.

For engineers reviewing the LTC2377IMS-20#TRPBF datasheet, LTC2377IMS-20#TRPBF pinout, LTC2377IMS-20#TRPBF application, or LTC2377IMS-20#TRPBF equivalent, key selection considerations include guaranteed 20-bit no-missing-codes performance, daisy-chain SPI interface compatibility with 1.8V–5V I/O, internal conversion clock, and DGC-enabled 0.5V–4.5V input range with 5V reference.

Technical Context

The LTC2377IMS-20#TRPBF implements a charge-redistribution SAR architecture with a 20-bit CDAC and differential comparator, achieving no pipeline delay and zero cycle latency. Its internal oscillator eliminates external timing dependencies, while auto power-down between conversions scales dissipation from 10.5mW at 500ksps to 10.5µW at 500sps.

Digital gain compression (DGC) remaps zero-scale from 0V to 0.1·VREF and full-scale from VREF to 0.9·VREF-enabling rail-to-rail input swing without negative supply for driving amplifiers. The device supports both normal mode (RDL/SDI as bus enable) and chain mode (RDL/SDI as serial data input) via the CHAIN pin.

Key Specifications

Pinout & Package

Package: 16-lead plastic MSOP (5mm × 4.4mm), industrial temperature grade (–40°C to +85°C), exposed pad not present (MSOP variant).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS127L01IRHBT and AD4022BCPZ-RL7, the LTC2377IMS-20#TRPBF uniquely balances 500ksps throughput, 20-bit no-missing-codes guarantee, and integrated DGC-making it optimal for space-constrained, battery-aware systems needing both speed and single-rail analog front-end simplicity.

Availability

LTC2377IMS-20#TRPBF is available at Aetrix Electronics and suitable for medical imaging signal chains, portable high-speed data loggers, and industrial process control systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC2377IMS-20#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC2377IMS-20#TRPBF belongs to ADI's precision SAR ADC product line, engineered for applications demanding metrology-grade linearity, low power, and simplified analog front-end design-especially where single-supply operation and daisy-chain scalability are critical.

FAQ

What is the operating temperature range for the LTC2377IMS-20#TRPBF?

The LTC2377IMS-20#TRPBF is rated for industrial operation from –40°C to +85°C. This range is confirmed in the manufacturer's order information table and applies to all electrical specifications unless otherwise noted. The "I" grade designation in the part number explicitly denotes this extended temperature capability, making the LTC2377IMS-20#TRPBF suitable for deployment in harsh environments such as factory automation and outdoor instrumentation.

Does the LTC2377IMS-20#TRPBF require an external clock source?

No, the LTC2377IMS-20#TRPBF features an internal oscillator that sets the conversion time, eliminating the need for an external clock source. This internal timing generator ensures consistent 1.5µs conversion time and removes jitter sensitivity and layout complexity associated with routing high-speed clocks. External timing is only required for the SPI interface (SCK), which operates independently and supports up to 100MHz.

How does Digital Gain Compression (DGC) function in the LTC2377IMS-20#TRPBF?

In the LTC2377IMS-20#TRPBF, DGC is enabled by grounding the REF/DGC pin. This causes the ADC to digitally remap zero-scale from 0V to 0.1·V_REF and full-scale from V_REF to 0.9·V_REF. With a 5V reference, the effective input range becomes 0.5V to 4.5V-providing 0.5V headroom on each rail. This allows the driving amplifier to operate from a single 5.5V supply instead of requiring ±5V rails, simplifying power design and reducing component count.

What package type and lead finish does the LTC2377IMS-20#TRPBF use?

The LTC2377IMS-20#TRPBF uses a 16-lead plastic MSOP package (5mm × 4.4mm footprint) with lead-free (RoHS-compliant) finish. The "#TRPBF" suffix confirms tape-and-reel packaging with Pb-free termination. Unlike the DFN variant, the MSOP version has no exposed thermal pad, and its θ_JA is specified as 110°C/W per the datasheet Absolute Maximum Ratings table.

Can the LTC2377IMS-20#TRPBF interface directly with a 1.8V microcontroller SPI port?

Yes, the LTC2377IMS-20#TRPBF supports 1.8V I/O logic levels via its OVDD pin. When OVDD is supplied at 1.8V, all digital pins (SCK, SDO, RDL/SDI, BUSY, CNV, CHAIN) meet 1.8V logic thresholds (VIH = 0.8×OVDD = 1.44V, VIL = 0.2×OVDD = 0.36V). The device maintains full 500ksps throughput and specification compliance across the 1.8V–5V OVDD range, enabling seamless interoperability with low-voltage host processors without level-shifting circuitry.