Analog Devices Inc. LTC1415ISW#TRPBF

Overview

LTC1415ISW#TRPBF 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 operating from a single 5 V supply.

For engineers reviewing the LTC1415ISW#TRPBF datasheet, LTC1415ISW#TRPBF pinout, LTC1415ISW#TRPBF application, or LTC1415ISW#TRPBF equivalent, key selection criteria include its 1.25 Msps throughput, 4.096 V full-scale input range, 55 mW active power dissipation, Nap/Sleep shutdown modes, and 28-pin SSOP package compatibility with µP/DSP parallel interfaces.

Technical Context

The LTC1415ISW#TRPBF implements a successive approximation register (SAR) architecture with an integrated differential sample-and-hold circuit, internal 2.500 V bandgap reference, and trimmed clock - enabling pipeline-free conversion results with no latency. Its 18 MHz analog input bandwidth supports undersampling of signals beyond Nyquist.

It features separate analog (AVDD), digital (DVDD), and output buffer (OVDD) supplies, allowing direct interfacing to 3 V logic via OVDD pin configuration. The BUSY signal and asynchronous CONVST/CS/RD control enable deterministic timing for FIFO, microprocessor, and DSP integration.

Key Specifications

Pinout & Package

Package: 28-lead plastic SSOP (Small Outline Wide), 5.6 mm × 10.2 mm body, 0.65 mm lead pitch, RoHS-compliant, rated for –40°C to +85°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit, 1 Msps+ sampling ADC applications.

Compared with ADS8325IPW and MAX1166ECM+, the LTC1415ISW#TRPBF uniquely balances 1.25 Msps speed, differential input robustness, and dual shutdown modes - making it optimal for real-time imaging and multiplexed DAQ where latency, noise immunity, and dynamic power management are co-critical.

Availability

LTC1415ISW#TRPBF 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 LTC1415ISW#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 LTC1415ISW#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for high-speed, low-distortion, low-power sampling in demanding real-time measurement systems.

FAQ

What is the maximum sampling frequency supported by the LTC1415ISW#TRPBF?

The LTC1415ISW#TRPBF supports a maximum sampling frequency of 1.25 Msps, with guaranteed 700 ns conversion time and 150 ns acquisition time. This allows full 12-bit accuracy at sustained throughput, and the device maintains 72 dB S/(N+D) at 100 kHz input - confirming its capability for real-time spectral capture up to the Nyquist limit of 625 kHz.

Does the LTC1415ISW#TRPBF require an external reference voltage?

No, the LTC1415ISW#TRPBF includes a factory-trimmed, temperature-compensated 2.500 V internal bandgap reference available at the VREF pin. It drives an internal reference amplifier to generate the 4.096 V full-scale voltage. An external reference can be applied to VREF if higher accuracy or custom scaling is needed, but it is not required for standard operation.

How does the Nap and Sleep shutdown functionality work on the LTC1415ISW#TRPBF?

The LTC1415ISW#TRPBF uses two pins - SHDN and NAP/SLP - to control power states. When SHDN is low, NAP/SLP high selects Nap mode (2.3 mA, 200 ns wake-up); NAP/SLP low selects Sleep mode (1 µA, 10 ms wake-up). In Nap mode, the internal clock remains active for fast resumption; in Sleep mode, clock and reference are disabled for ultra-low quiescent current.

Can the LTC1415ISW#TRPBF interface directly with 3 V microcontrollers?

Yes, the LTC1415ISW#TRPBF supports direct 3 V logic interfacing via its dedicated OVDD pin (Pin 26). When OVDD is tied to 3 V, the D11–D0 outputs swing between 0 V and 3 V, matching standard LVCMOS levels. This eliminates level shifters and simplifies integration with modern low-voltage µPs and FPGAs while maintaining full 12-bit timing integrity.

What is the significance of the differential input architecture in the LTC1415ISW#TRPBF?

The differential input architecture of the LTC1415ISW#TRPBF provides 60 dB common-mode rejection from DC to 1 MHz, enabling accurate measurement of small signals in noisy environments - such as motor current sensing or sensor bridges - without ground-loop interference. It also supports single-ended use (+AIN referenced to –AIN grounded) and flexible input range configurations via VREF manipulation.