Analog Devices Inc. LTC1415CSW#TRPBF

Overview

LTC1415CSW#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 1 MHz. It operates from a single 5 V supply, draws 55 mW in active mode, and supports external or internal reference operation - ideal for high-speed imaging and DSP data acquisition systems.

For engineers reviewing the LTC1415CSW#TRPBF datasheet, LTC1415CSW#TRPBF pinout, LTC1415CSW#TRPBF application, or LTC1415CSW#TRPBF equivalent, key selection criteria include its 1.25 Msps throughput, 18 MHz full-power bandwidth, differential input architecture, 3-state parallel 12-bit output interface, and dual power-down modes (Nap/Sleep) enabling low-power embedded signal capture.

Technical Context

The LTC1415CSW#TRPBF uses a successive approximation register (SAR) architecture with an integrated differential sample-and-hold circuit, internal 2.50 V bandgap reference, and trimmed clock. Its 18 MHz analog input bandwidth and 60 dB DC–1 MHz common-mode rejection enable robust acquisition of noisy or ground-loop–prone signals.

It features µP-compatible parallel output with no pipeline delay, separate BUSY and RD control, and independent OVDD logic supply (3 V or 5 V). Conversion is initiated by CONVST falling edge, with BUSY rising edge indicating data readiness - supporting direct interfacing to FIFOs, DSPs, and microprocessors without glue logic.

Key Specifications

Pinout & Package

The LTC1415CSW#TRPBF is housed in a 28-lead plastic SSOP (Shrink Small Outline Package), 5.6 mm × 13.9 mm body, 0.65 mm lead pitch, moisture sensitivity level 3. Thermal resistance θ_JA = 130°C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADS8325IPW and MAX1166ECM+, the LTC1415CSW#TRPBF delivers 12.5× higher sampling rate, integrated reference and differential input, and sub-mW sleep power - making it uniquely suited for portable, high-fidelity signal capture where timing determinism and noise immunity are critical.

Availability

LTC1415CSW#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, imaging systems, and telecommunications equipment requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for LTC1415CSW#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 LTC1415CSW#TRPBF belongs to ADI's legacy Linear Technology precision data conversion product line, designed specifically for demanding high-speed, low-noise, low-power applications where accuracy, timing integrity, and system integration matter.

FAQ

What is the maximum sampling frequency supported by the LTC1415CSW#TRPBF?

The LTC1415CSW#TRPBF supports a maximum sampling frequency of 1.25 Msps, as confirmed in the Timing Characteristics table under fSAMPLE(MAX). This rate is achievable with proper timing margins on CONVST, BUSY, and RD signals, and assumes VDD = 5 V and TA = 25°C. At this rate, conversion time is 700 ns and acquisition time is 150 ns, enabling full throughput without pipeline latency.

Does the LTC1415CSW#TRPBF require an external reference, or does it have an internal one?

The LTC1415CSW#TRPBF includes an internal, temperature-compensated 2.50 V bandgap reference accessible at Pin 3 (VREF), which is factory-trimmed to ±20 ppm/°C drift. It can operate with this internal reference or accept an external reference applied to VREF - the internal reference amplifier gains VREF by 1.638× to produce the 4.096 V full-scale voltage required by the DAC core.

What are the power consumption modes of the LTC1415CSW#TRPBF, and how are they controlled?

The LTC1415CSW#TRPBF offers three power states: active (55 mW), Nap mode (7.5 mW), and Sleep mode (0.01 mW). Nap mode is entered when SHDN = 0 V and NAP/SLP = 5 V; Sleep mode requires SHDN = 0 V and NAP/SLP = 0 V. Wake-up times are 200 ns (Nap) and 10 ms (Sleep), as specified in the Timing Characteristics table.

Can the LTC1415CSW#TRPBF interface directly with 3 V logic devices?

Yes - the LTC1415CSW#TRPBF features a dedicated OVDD pin (Pin 26) that sets the output logic level. When OVDD is tied to 3 V, the D11–D0 outputs drive 3 V–compatible high/low levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V), enabling direct connection to 3 V FPGAs, microcontrollers, or ASICs without level shifters or additional buffers.

What is the analog input structure of the LTC1415CSW#TRPBF, and how does it affect noise rejection?

The LTC1415CSW#TRPBF employs a true differential sample-and-hold circuit with ±AIN inputs, delivering 60 dB common-mode rejection ratio (CMRR) from DC to 1 MHz. This architecture rejects ground-loop noise, power supply ripple, and EMI coupled equally onto both inputs - critical for high-precision measurements in electrically noisy environments like motor drives or medical equipment.