Analog Devices Inc. LTC1402CGN#TRPBF

Overview

LTC1402CGN#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 2.2 Msps serial sampling ADC with true differential inputs, internal 4.096 V reference, and dual ±5 V or single 5 V supply operation. It delivers 72 dB S/(N + D), –89 dB THD at Nyquist, 80 MHz full-power bandwidth, and supports unipolar (0 V to 4.096 V) or bipolar (±2.048 V) input ranges - used in high-speed data acquisition systems requiring precision timing and noise rejection.

For engineers reviewing the LTC1402CGN#TRPBF datasheet, LTC1402CGN#TRPBF pinout, LTC1402CGN#TRPBF application, or LTC1402CGN#TRPBF equivalent, key selection criteria include its 2.2 Msps throughput, 12-bit no-missing-codes performance over temperature, Nap/Sleep power modes (15 mW / 10 µW), SPI/MICROWIRE-compatible 3-wire interface, and differential input common-mode rejection up to –62 dB at 1 MHz.

Technical Context

The LTC1402CGN#TRPBF integrates a high-bandwidth sample-and-hold with curvature-corrected bandgap reference and successive-approximation register (SAR) architecture. Its differential input stage accepts ±2.048 V (bipolar) or 0–4.096 V (unipolar) signals while rejecting common-mode noise - critical for ground-loop elimination in sensor front-ends and RF receiver chains.

Timing is controlled via external CONV and SCK signals; conversion completes in 14 SCK cycles, with acquisition time of 57 ns and aperture jitter of just 1 ps. The 3-wire serial port outputs 12-bit data plus REFREADY bit, with OVDD supporting direct interfacing to 3 V or 5 V logic levels.

Key Specifications

Pinout & Package

Package: 16-lead narrow plastic SSOP (GN), 0.150" body width, JEDEC MO-153 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD7892BRZ-1 and MAX1190ECM+, the LTC1402CGN#TRPBF uniquely combines differential input architecture, selectable bipolar/unipolar range, integrated reference with overdrive capability, and dual low-power Nap/Sleep modes - making it optimal for portable, noise-sensitive, and mixed-supply applications where signal integrity and power efficiency are co-prioritized.

Availability

LTC1402CGN#TRPBF is available at Aetrix Electronics and suitable for telecommunications infrastructure, portable test equipment, and high-speed data acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC1402CGN#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, serving industrial, automotive, communications, and healthcare markets.

The LTC1402CGN#TRPBF belongs to Linear Technology's legacy high-speed precision ADC product line, designed specifically for applications demanding low distortion, excellent SNR, and flexible power management in space-constrained, noise-sensitive environments.

FAQ

What is the operating temperature range for the LTC1402CGN#TRPBF?

The LTC1402CGN#TRPBF is specified for commercial-grade operation from 0°C to 70°C. This range covers standard industrial and instrumentation environments where ambient thermal conditions remain controlled. All key specifications - including integral linearity error (±1 LSB), S/(N + D) ratio (72 dB), and THD (–89 dB) - are guaranteed across this full temperature span, ensuring consistent performance without derating.

Does the LTC1402CGN#TRPBF support both single-ended and differential input configurations?

Yes, the LTC1402CGN#TRPBF supports both configurations. In single-ended mode, AIN– is grounded and AIN+ accepts 0–4.096 V (unipolar) or ±2.048 V (bipolar). In true differential mode, AIN+ and AIN– are driven with complementary signals - enabling common-mode noise rejection and eliminating ground loops. The device maintains full 12-bit no-missing-codes performance in either configuration.

How does the REFREADY bit function in the LTC1402CGN#TRPBF serial output word?

The REFREADY bit appears as the MSB (bit 12) in each 13-bit serial output word from the LTC1402CGN#TRPBF. It asserts high once the internal 4.096 V reference has settled - particularly critical after exiting Sleep mode, where VREF requires 2 ms to stabilize. This bit allows the host processor to verify reference readiness before acting on conversion results, preventing invalid data reads during wake-up transitions.

Can the LTC1402CGN#TRPBF operate from a single 5 V supply in bipolar mode?

Yes - the LTC1402CGN#TRPBF supports bipolar operation (±2.048 V input range) with a single 5 V supply (VDD = 5 V, VSS = 0 V), provided both AIN+ and AIN– remain within the absolute voltage range of –2.5 V to 5 V. This capability enables direct interfacing with rail-to-rail op amps like the LT1632 without level-shifting circuitry, preserving signal integrity and simplifying power architecture.

What are the timing requirements for reliable data capture from the LTC1402CGN#TRPBF DOUT pin?

For reliable DOUT capture, the host must sample on the rising edge of SCK with setup/hold margins meeting t8 (9–12 ns delay from SCK to valid bits) and t10 (4–7 ns hold time after SCK). The DOUT driver uses OVDD as its supply, so logic thresholds scale with OVDD (e.g., VOH ≥ 2.5 V when OVDD = 3 V). A minimum SCK period of 28 ns (35.7 MHz max clock) ensures proper internal timing alignment.