Analog Devices Inc. DC052A

Overview

LTC1410 from Analog Devices (formerly Linear Technology) is a 12-bit, 1.25 Msps successive-approximation analog-to-digital converter with differential sample-and-hold, internal ±2.5V bipolar input range, 71 dB S/(N + D) at Nyquist, and dual shutdown modes (Nap: 7 mW; Sleep: 10 µW). It serves as a high-speed data acquisition front-end in telecom baseband receivers and spectrum analyzers.

For engineers reviewing the LTC1410 datasheet, LTC1410 pinout, LTC1410 application, or LTC1410 equivalent, key selection criteria include its 20 MHz full-power bandwidth, no-pipeline-delay parallel output, ±1 LSB INL/DNL over temperature, internal 2.5 V reference with 15 ppm/°C tempco, and true differential input rejection of 60 dB common-mode noise.

Technical Context

The LTC1410 implements a capacitor-based successive approximation register (SAR) architecture with an integrated differential sample-and-hold circuit. Its 20 MHz full-power bandwidth enables undersampling of RF IF signals up to 625 kHz without aliasing degradation, while the 60 dB CMRR supports ground-loop-free measurement of low-level sensor outputs.

Digital interface uses asynchronous µP-compatible control: active-low CONVST initiates conversion, BUSY indicates completion, and RD enables three-state parallel output (D11–D0). No external clock or timing synchronization is required due to factory-trimmed internal oscillator with guaranteed ≤750 ns conversion time.

Key Specifications

Pinout & Package

28-pin SO Wide (SW) plastic package - 11.5 mm × 17.9 mm body, 1.27 mm pitch, gull-wing leads; compatible with standard surface-mount reflow profiles and manual prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8326IDB and MAX1190ECM+, the LTC1410 uniquely combines 1.25 Msps throughput, internal reference, dual shutdown modes, and true differential inputs - making it optimal for portable, battery-aware, high-fidelity data acquisition where board space and supply complexity are constrained.

Availability

LTC1410 is available at Aetrix Electronics and suitable for telecommunications infrastructure, digital signal processing hardware, and high-speed data acquisition systems requiring stable component supply across extended temperature ranges.

Supply support for LTC1410 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 LTC1410 belongs to ADI's legacy Linear Technology high-speed precision ADC product line, engineered for demanding data acquisition applications where speed, linearity, and power efficiency must coexist without compromise.

FAQ

What is the maximum sampling rate supported by the LTC1410?

The LTC1410 supports a guaranteed maximum sampling rate of 1.25 Msps. This is achieved with a total throughput time (acquisition + conversion) of ≤800 ns, enabling real-time digitization of signals up to the Nyquist frequency of 625 kHz. The internal clock is factory-trimmed to ensure this performance across the full industrial temperature range (–40°C to +85°C) without external timing components.

Does the LTC1410 require an external reference voltage?

No, the LTC1410 does not require an external reference voltage. It integrates a factory-trimmed, temperature-compensated 2.500 V bandgap reference with ±15 ppm/°C tempco, available at the VREF pin. However, the VREF pin can be overdriven with an external 2.25–2.75 V reference (e.g., LT1019A-2.5) for improved accuracy or input span adjustment, as documented in the LTC1410 datasheet Figure 8b.

How does the LTC1410 handle differential versus single-ended analog inputs?

The LTC1410 accepts both differential and single-ended analog inputs via +AIN and –AIN pins. In differential mode, it rejects common-mode noise up to 60 dB, ideal for noisy environments. In single-ended mode, –AIN is grounded and +AIN accepts a 0–5 V or ±2.5 V signal depending on reference configuration. The sample-and-hold acquires both inputs simultaneously, preserving phase coherence critical for I/Q demodulation.

What are the power consumption characteristics of the LTC1410 in shutdown modes?

The LTC1410 offers two distinct low-power states: Nap mode draws 7–12 mW (1.5–2.3 mA on VDD, 10–200 µA on VSS) with 200 ns wake-up time; Sleep mode draws only 0.01–1 mW (1–100 µA on both supplies) but requires longer wake-up. These modes are selected via NAP/SLP and enabled by SHDN, enabling aggressive power cycling in portable instrumentation without sacrificing startup responsiveness.

Can the LTC1410 interface directly with a microprocessor bus without additional logic?

Yes, the LTC1410 is designed for direct µP bus interfacing using standard memory-mapped control signals: CS, RD, and CONVST. Its three-state parallel outputs (D11–D0), BUSY status flag, and no-pipeline-delay architecture eliminate the need for glue logic or FIFOs. When CS and RD are asserted, data appears on the bus synchronized to BUSY's rising edge - matching timing requirements of common 8051, ARM, and DSP platforms as verified in the LTC1410 digital interface section.