Analog Devices Inc. LTC1407CMSE-1#TRPBF

Overview

LTC1407CMSE-1#TRPBF from Analog Devices (formerly Linear Technology) is a 14-bit, 3Msps simultaneous-sampling dual-channel ADC with differential inputs, 80dB CMRR at 100kHz, ±1.25V differential input range, and 10μW sleep-mode power consumption. It operates from a single 3V supply in a 10-lead MSOP package and is used in I/Q demodulation and multiphase motor control systems requiring precise time-aligned sampling.

For engineers reviewing the LTC1407CMSE-1#TRPBF datasheet, LTC1407CMSE-1#TRPBF pinout, LTC1407CMSE-1#TRPBF application, or LTC1407CMSE-1#TRPBF equivalent, key selection criteria include simultaneous dual-channel acquisition timing, 1.5Msps per-channel throughput, internal 2.5V reference accuracy (±15 ppm/°C), 3-wire serial interface compatibility, and MSOP-10 thermal performance (θ_JA = 40°C/W).

Technical Context

The LTC1407CMSE-1#TRPBF implements two independent sample-and-hold circuits triggered simultaneously on the rising edge of CONV, enabling true interleaved sampling without channel skew beyond 200ps aperture skew. Its architecture uses a 2.5V internal bandgap reference with external overdrive capability (2.55V–V_DD) and supports both internal and external reference configurations.

Conversion is performed at 1.5Msps per channel using a pipelined ADC core, outputting 14-bit two's-complement data via a three-state SDO pin synchronized to SCK. Timing logic ensures acquisition time of 39ns and conversion latency of 32–34 SCLK cycles, with full-power bandwidth of 50MHz and SFDR ≥86dB at 100kHz input.

Key Specifications

Pinout & Package

Package: 10-lead plastic MSOP (MSE) with exposed thermal pad (Pin 11), rated for 0°C to 70°C operation. Exposed pad must be soldered to PCB ground plane for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IDGSR and AD7357BRUZ, the LTC1407CMSE-1#TRPBF uniquely delivers simultaneous 1.5Msps/channel sampling with integrated reference and ultra-low sleep power-making it irreplaceable in portable, phase-sensitive, battery-operated instrumentation.

Availability

LTC1407CMSE-1#TRPBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, industrial motor control, data acquisition systems, and portable test equipment requiring stable component supply across extended production lifecycles.

Supply support for LTC1407CMSE-1#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 high-performance analog product lines, including precision data converters, with global manufacturing and qualification standards.

The LTC1407 family was designed for high-speed, low-power, simultaneous-sampling applications in portable instrumentation and industrial control-emphasizing timing coherence, power efficiency, and integration of reference and interface functions in compact MSOP packages.

FAQ

What is the guaranteed operating temperature range for the LTC1407CMSE-1#TRPBF?

The LTC1407CMSE-1#TRPBF is specified for operation from 0°C to 70°C (Commercial grade). This range is confirmed in the "ORDER INFORMATION" table of the datasheet, where "C" denotes the commercial temperature grade, and the part marking "LTBGT" corresponds to the 0°C to 70°C specification. The device's thermal design-including θ_JA = 40°C/W and exposed pad grounding-ensures reliable performance within this range under typical PCB layout conditions.

Does the LTC1407CMSE-1#TRPBF support external reference voltage, and what are the valid voltage limits?

Yes, the LTC1407CMSE-1#TRPBF supports external reference voltage applied to the VREF pin. Per the "INTERNAL REFERENCE CHARACTERISTICS" section, the external reference must be ≥2.55V and ≤V_DD, with V_DD ranging from 2.7V to 3.6V. At 3V supply, this defines a valid external reference window of 2.55V to 3.0V. The internal 2.5V reference remains active but is overdriven, enabling improved SNR when using a low-noise 2.55V external source.

How does the LTC1407CMSE-1#TRPBF enter and exit sleep mode, and what is the wake-up latency?

The LTC1407CMSE-1#TRPBF enters sleep mode after four or more CONV pulses while SCK is held static (high or low). Wake-up is initiated by any SCK edge, and the internal 2.5V reference settles in 2ms (per Note 14), after which valid conversions resume. During wake-up, the device draws ~2.0μA (nap mode) before transitioning to full 4.7mA active current. This behavior is explicitly defined in the "PIN FUNCTIONS" and "TIMING DIAGRAMS" sections.

What is the maximum allowed source impedance for driving the analog inputs of the LTC1407CMSE-1#TRPBF without degrading acquisition time?

The LTC1407CMSE-1#TRPBF specifies a 39ns acquisition time (t_ACQ) under nominal conditions. As stated in the "APPLICATIONS INFORMATION" section, high external source resistance combined with 13pF input capacitance increases acquisition time beyond 39ns. While no hard maximum is given, empirical guidance indicates ≤50Ω source impedance maintains full-speed performance; above 100Ω, buffer amplification (e.g., LT1806) is recommended to ensure settling within the 39ns window.

Is the LTC1407CMSE-1#TRPBF pin-compatible with the LTC1407-1 series, and what distinguishes the "A-1" suffix?

Yes, the LTC1407CMSE-1#TRPBF is pin-compatible with all LTC1407-1/LTC1407A-1 variants in the same MSOP-10 package. The "A-1" suffix denotes the 14-bit resolution version (vs. 12-bit for LTC1407-1), with corresponding specifications: ±0.5LSB integral linearity (vs. ±0.25LSB), ±2LSB offset error (vs. ±1LSB), and 72dB SINAD at 100kHz (vs. 70.5dB). All timing, pinout, power, and interface behavior remain identical.