Analog Devices Inc. LTC1415CG#PBF

Overview

LTC1415CG#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 1.25 Msps sampling analog-to-digital converter with ±0.35 LSB INL, 72 dB S/(N+D) at 100 kHz, and true differential inputs rejecting common-mode noise up to 60 dB - used in high-speed imaging and DSP data acquisition systems.

For engineers reviewing the LTC1415CG#PBF datasheet, LTC1415CG#PBF pinout, LTC1415CG#PBF application, or LTC1415CG#PBF equivalent, key selection criteria include single 5 V supply operation, 55 mW active power dissipation, 700 ns conversion time, 18 MHz full-power bandwidth, and support for external or internal reference configurations.

Technical Context

The LTC1415CG#PBF employs a successive approximation register (SAR) architecture with an integrated differential sample-and-hold circuit, enabling simultaneous acquisition on +AIN and –AIN with 150 ns acquisition time and 18 MHz input bandwidth. Its internal 2.50 V bandgap reference is gain-adjusted to 4.096 V full-scale via a precision reference amplifier.

It features µP-compatible 12-bit parallel output with no pipeline delay, separate BUSY and RD signals for FIFO/DSP interfacing, and dual shutdown modes (Nap: 2.3 mA; Sleep: 1.0 µA). The output logic supply (OVDD) is independently configurable for 3 V or 5 V interface compatibility.

Key Specifications

Pinout & Package

Package: 28-pin plastic SO wide (SOIC-W), RoHS-compliant, JEDEC MS-013AC, body size 17.9 mm × 7.5 mm, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS7822U and MAX1166BCPP+, the LTC1415CG#PBF uniquely combines 1.25 Msps parallel throughput, integrated reference, differential inputs, and dual shutdown modes - making it optimal for high-channel-count, low-latency, mixed-signal embedded systems requiring deterministic timing and minimal BOM count.

Availability

LTC1415CG#PBF is available at Aetrix Electronics and suitable for high-speed data acquisition, imaging systems, and digital signal processing applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC1415CG#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The LTC1415CG#PBF belongs to ADI's legacy Linear Technology precision data converter product line, designed specifically for demanding high-speed, low-distortion sampling applications in test equipment, medical imaging, and real-time control systems.

FAQ

What is the operating temperature range for the LTC1415CG#PBF?

The LTC1415CG#PBF is rated for commercial-grade operation from 0°C to +70°C. This is indicated by the "C" suffix in the part number. For extended temperature applications (–40°C to +85°C), the LTC1415IG#PBF variant is specified. Thermal derating applies above 70°C ambient; junction temperature must remain below 110°C per datasheet absolute maximum ratings.

Does the LTC1415CG#PBF require an external reference, or can it operate with its internal reference?

The LTC1415CG#PBF can operate with either its internal reference or an external reference. Its internal 2.50 V bandgap reference is factory-trimmed and drives a reference amplifier to produce the 4.096 V full-scale range. Pin 3 (VREF) provides access to this 2.50 V source, and Pin 4 (REFCOMP) must be bypassed with ≥10 µF to AGND. External references may be applied to VREF to adjust full-scale range.

How does the Nap and Sleep shutdown functionality work on the LTC1415CG#PBF?

The LTC1415CG#PBF implements two distinct low-power states via SHDN and NAP/SLP pins. When SHDN is pulled low, asserting NAP/SLP high activates Nap mode (2.3 mA supply current, ~200 ns wake-up). Pulling NAP/SLP low instead activates Sleep mode (1.0 µA, 10 ms wake-up with 10 µF REF COMP capacitor). Both modes retain register state and require no reinitialization upon wake-up.

Can the LTC1415CG#PBF interface directly with 3 V logic systems?

Yes, the LTC1415CG#PBF supports direct 3 V logic interfacing via its dedicated OVDD pin (Pin 26). When OVDD is tied to 3 V, all 12-bit parallel outputs (D11–D0) swing between 0 V and 3 V, matching standard LVCMOS levels. DVDD and AVDD remain at 5 V for analog and core digital operation, enabling mixed-voltage system integration without level shifters.

What is the significance of the 4.096 V full-scale input range in the LTC1415CG#PBF?

The 4.096 V full-scale range in the LTC1415CG#PBF corresponds precisely to 1 mV per LSB (2¹² = 4096 steps), simplifying scaling in software and eliminating floating-point math in many embedded applications. It also aligns with common DAC output ranges (e.g., LTC2600 series) and allows direct connection to low-noise op amps optimized for that span, such as the LT1363 or LT1227.