Analog Devices Inc. LTC1407ACMSE-1#PBF

Overview

LTC1407ACMSE-1#PBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3Msps simultaneous-sampling dual-channel ADC with two fully differential inputs, ±1.25V input range, 80dB CMRR at 100kHz, and 10μW sleep shutdown mode. It operates from a single 3V supply in a 10-lead MSOP package and targets high-speed portable data acquisition where channel-to-channel timing alignment and low power are critical.

For engineers reviewing the LTC1407ACMSE-1#PBF datasheet, LTC1407ACMSE-1#PBF pinout, LTC1407ACMSE-1#PBF application, or LTC1407ACMSE-1#PBF equivalent, key selection considerations include simultaneous sampling integrity (200ps aperture skew), internal 2.5V reference accuracy (±15ppm/°C tempco), differential input common-mode range (0V to VDD), and serial interface timing compatibility with standard 3-wire SPI controllers.

Technical Context

The LTC1407ACMSE-1#PBF implements two independent sample-and-hold circuits triggered simultaneously on the rising edge of CONV, enabling true interleaved sampling without inter-channel timing drift. Each channel converts at 1.5Msps, delivering 14-bit results via a 32-clock serial output using 2's complement format.

Its architecture includes an on-chip 2.5V bandgap reference with external overdrive capability (2.55V–VDD), 13pF analog input capacitance per pin, and 39ns acquisition time. The device supports three power states: active (4.7mA), nap (1.1mA), and sleep (10μA), with VREF settling in 2ms after wake-up.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE), exposed pad (Pin 11) soldered to PCB ground plane; θJA = 40°C/W, TJMAX = 125°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-channel simultaneous-sampling ADC applications.

Compared with ADS8327IDRCT and AD7357BCPZ-RL7, the LTC1407ACMSE-1#PBF uniquely balances 14-bit resolution, true simultaneous sampling, ultra-low sleep power (10μW), and compact MSOP packaging-making it optimal for portable, battery-constrained instrumentation requiring phase-coherent dual-channel capture.

Availability

LTC1407ACMSE-1#PBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial data loggers, and uninterruptible power supplies requiring stable component supply across extended production lifecycles.

Supply support for LTC1407ACMSE-1#PBF 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 high-performance analog product lines, including precision data converters, with global manufacturing and quality certification to ISO 9001 and AEC-Q200 where applicable.

The LTC1407ACMSE-1#PBF belongs to Linear's legacy high-speed ADC family designed specifically for portable and power-sensitive instrumentation requiring simultaneous dual-channel sampling without external timing synchronization circuitry.

FAQ

What is the guaranteed operating temperature range for the LTC1407ACMSE-1#PBF?

The LTC1407ACMSE-1#PBF is specified for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "C" suffix in the part number and the order information table listing "0°C to 70°C" under Temperature Range for LTC1407ACMSE-1#PBF. Full parametric performance-including INL, offset match, and SINAD-is guaranteed across this range when powered from 2.7V–3.6V.

Does the LTC1407ACMSE-1#PBF support external reference voltage, and what are the valid voltage limits?

Yes, the LTC1407ACMSE-1#PBF supports external reference voltage applied to the VREF pin (Pin 3). The valid range is 2.55V to VDD (up to 3.6V), as explicitly stated in the Internal Reference Characteristics table and Applications Information section. External references below 2.55V will not override the internal 2.5V reference due to the open-drain P-channel output structure.

How does the LTC1407ACMSE-1#PBF enter and exit sleep mode, and what is the VREF settling time after wake-up?

The LTC1407ACMSE-1#PBF enters sleep mode with four or more CONV pulses while SCK is held static (high or low). Wake-up occurs on the first SCK edge, and the internal 2.5V reference settles in 2ms-verified by the VREF Settling Time After Sleep-to-Wake Transition specification (Note 14). During this period, conversions should be inhibited until VREF stabilizes.

What is the maximum allowed source impedance for driving the analog inputs of the LTC1407ACMSE-1#PBF without degrading acquisition time?

The LTC1407ACMSE-1#PBF specifies 39ns acquisition time (tACQ) with low source impedance. When driven through high external resistance combined with 13pF input capacitance, acquisition time increases beyond 39ns. While no absolute maximum is given, design guidelines recommend ≤50Ω source impedance for full-rate operation; above 100Ω, a buffer amplifier (e.g., LT1806) is advised to maintain 0.5LSB settling.

Is the LTC1407ACMSE-1#PBF pin-compatible with the LTC1407CMSE-1#PBF, and what is the key functional difference?

Yes, the LTC1407ACMSE-1#PBF is pin-compatible with the LTC1407CMSE-1#PBF. The key functional difference is resolution: LTC1407ACMSE-1#PBF is a 14-bit device (1LSB = 152μV), while LTC1407CMSE-1#PBF is 12-bit (1LSB = 610μV). This is confirmed in Note 17 and the Converter Characteristics table, where LTC1407A-1 specifications show ±0.5LSB INL vs ±2LSB for LTC1407-1.