Analog Devices Inc. LTC1860HMS8#TRPBF

Overview

LTC1860HMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 250ksps single-channel successive approximation ADC with true differential analog input, adjustable reference pin, and SPI/MICROWIRE-compatible serial interface. It operates on a single 5V supply, draws only 850µA typical supply current at full speed, and auto-shuts down to 1nA between conversions. Designed for high-speed, low-power data acquisition in harsh environments, it supports operation up to 125°C in the MSOP-8 package.

For engineers reviewing the LTC1860HMS8#TRPBF datasheet, LTC1860HMS8#TRPBF pinout, LTC1860HMS8#TRPBF application, or LTC1860HMS8#TRPBF equivalent, key selection criteria include guaranteed 125°C operation, differential input architecture with ±2 LSB INL, 72dB SNR at 100kHz, 2.75µs conversion time, and MSOP-8 thermal performance (θ_JA = 210°C/W).

Technical Context

The LTC1860HMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage accepts IN+–IN– voltages from 0V to V_REF, supporting ratiometric or external reference configurations down to 1V full-scale span. The device uses a 3-wire serial interface where CONV initiates conversion and controls SDO enablement, while SCK synchronizes 12-bit data output on falling edges.

Thermal design is critical: the H-grade MSOP-8 package is rated for –40°C to +125°C operation with T_JMAX = 150°C and θ_JA = 210°C/W. Power management is dynamic-supply current scales from 850µA at 250ksps to 1nA in sleep mode, with auto-shutdown triggered by holding CONV high post-conversion.

Key Specifications

Pinout & Package

Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, lead-free finish, tape-and-reel packaging (#TRPBF). Thermal resistance θ_JA = 210°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, high-speed, low-power ADC applications.

Compared with ADS7816U and LTC1864CMS8#PBF, LTC1860HMS8#TRPBF uniquely combines 125°C operation, differential input, 1nA sleep current, and 12-bit precision in an MSOP-8 package-making it optimal for thermally constrained, noise-immune, ultra-low-power industrial sensing.

Availability

LTC1860HMS8#TRPBF is available at Aetrix Electronics and suitable for motor control, industrial temperature monitoring, isolated battery management, and portable medical instrumentation requiring stable component supply across extended temperature ranges.

Supply support for LTC1860HMS8#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 acquired Linear Technology in 2017 and maintains its legacy high-performance analog product lines. Linear Technology was founded in 1981 and specialized in precision analog ICs for demanding industrial, automotive, and aerospace applications.

The LTC1860 series belongs to Linear's precision data acquisition product line, designed specifically for low-power, high-speed, high-accuracy analog-to-digital conversion in thermally extreme and electrically noisy environments.

FAQ

What is the maximum operating temperature specification for the LTC1860HMS8#TRPBF?

The LTC1860HMS8#TRPBF is rated for continuous operation from –40°C to +125°C ambient temperature. This H-grade qualification is verified per manufacturer specifications and applies to the full parametric performance envelope-including 250ksps sampling rate, ±1 LSB INL, and 72dB SNR-within this temperature range. The MSOP-8 package has a maximum junction temperature of 150°C and thermal resistance θ_JA = 210°C/W.

Does the LTC1860HMS8#TRPBF support true differential input operation?

Yes, the LTC1860HMS8#TRPBF features a true differential analog input architecture with dedicated IN+ and IN– pins. It measures the voltage difference between these two inputs, providing inherent common-mode noise rejection. Full-scale output occurs when IN+ – IN– equals V_REF – 1 LSB, and zero code occurs when the differential input is 0V. This architecture eliminates the need for external instrumentation amplifiers in many noise-prone applications.

What is the supply current consumption of the LTC1860HMS8#TRPBF at 250ksps and in sleep mode?

At 250ksps sampling rate, the LTC1860HMS8#TRPBF draws 850µA typical supply current from a 5V supply. Between conversions, it automatically enters sleep mode drawing only 1nA typical supply current when the CONV pin is held high. This dynamic power management enables ultra-low average power in duty-cycled applications-e.g., 1ksps average sampling yields ~2µA average current per the datasheet's supply current vs. sampling frequency curve.

Can the LTC1860HMS8#TRPBF operate with a reference voltage lower than 5V?

Yes, the LTC1860HMS8#TRPBF supports reference voltages from 1V to V_CC (5.25V max). The VREF pin accepts externally generated references, enabling direct interfacing with low-voltage sensors (e.g., 1V-output bridge transducers) without signal conditioning. When VREF = 1V, full-scale input range becomes 0V to 1V differential, preserving 12-bit resolution across the reduced span. Reference current draw is only 0.001µA typical.

What serial interface protocol does the LTC1860HMS8#TRPBF use, and what are its timing requirements?

The LTC1860HMS8#TRPBF uses a 3-wire SPI/MICROWIRE-compatible serial interface with CONV, SCK, and SDO lines. Data is output MSB-first on the falling edge of SCK; the host should sample on the rising edge. Maximum SCK frequency is 20MHz for H-grade devices. Key timing parameters include t_CONV = 2.75µs (conversion time), t_suCONV = 60ns (setup before first SCK), and t_dDO = 25ns (SCK↓ to valid SDO data).