Analog Devices Inc. LTC2414CGN#TRPBF

Overview

LTC2414CGN#TRPBF from Analog Devices (formerly Linear Technology) is an 8-channel, 24-bit no-latency delta-sigma ADC with integrated oscillator, 2 ppm INL, 0.2 ppm RMS noise, and single-cycle settling for multiplexed sensor measurements. It operates from 2.7V to 5.5V, supports differential or single-ended inputs, and delivers 110 dB 50/60 Hz notch rejection-ideal for precision weigh scales and industrial process control.

For engineers reviewing the LTC2414CGN#TRPBF datasheet, LTC2414CGN#TRPBF pinout, LTC2414CGN#TRPBF application, or LTC2414CGN#TRPBF equivalent, key selection criteria include its 28-lead SSOP package, 200 µA active supply current, 2.7–5.5 V supply range, 0.1–V_CC reference voltage flexibility, and guaranteed no missing codes over full temperature range (0°C to 70°C).

Technical Context

The LTC2414CGN#TRPBF implements a third-order delta-sigma modulator with decimating FIR filter and on-chip autocalibration that performs offset and full-scale correction every conversion cycle. Its digital filter achieves first null at 50 Hz (FO = V_CC) or 60 Hz (FO = GND), eliminating need for external clock components.

It uses a 4-wire SPI/MICROWIRE-compatible interface with bidirectional SCK pin (internal or external clock mode), configurable channel addressing via SDI, and CS-controlled sleep mode reducing current to 4 µA. Input common-mode rejection exceeds 140 dB DC and 110 dB at line frequencies.

Key Specifications

Pinout & Package

Package: 28-lead plastic SSOP (GN package), 0°C to 70°C operating temperature range.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 24-bit delta-sigma ADC applications.

Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2414CGN#TRPBF uniquely combines 8-channel multiplexing, user-selectable 50/60 Hz notch, 2.7–5.5 V operation, and true differential reference interface-making it optimal for industrial sensor hubs where flexibility, noise immunity, and supply robustness are critical.

Availability

LTC2414CGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, strain gauge transducers, and direct temperature measurement systems requiring stable component supply, long-term calibration integrity, and RoHS-compliant tape-and-reel packaging.

Supply support for LTC2414CGN#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, including high-performance delta-sigma ADCs, with focus on industrial, instrumentation, and medical signal chains.

The LTC2414CGN#TRPBF belongs to Linear's "No Latency Delta-Sigma" ADC family, designed specifically for high-accuracy, low-power, multiplexed sensor digitization in harsh electrical environments-emphasizing ease of use, inherent stability, and elimination of external timing components.

FAQ

What is the operating temperature range for the LTC2414CGN#TRPBF?

The LTC2414CGN#TRPBF is rated for 0°C to 70°C ambient operation. This commercial-grade temperature range is specified in the order information table and confirmed in the Absolute Maximum Ratings section. The 'C' grade designation in the part number explicitly denotes this 0°C to 70°C range, distinguishing it from the 'I' grade (–40°C to 85°C) variants like LTC2414IGN#TRPBF. All electrical specifications-including INL, noise, and rejection-are guaranteed across this full range.

Does the LTC2414CGN#TRPBF require external passive components for its oscillator function?

No, the LTC2414CGN#TRPBF does not require external passive components for oscillator operation. Its integrated oscillator needs no crystals, capacitors, or resistors-confirmed in the Features list ("Internal Oscillator-No External Components Required") and Pin Functions description. The FO pin selects between internal 50 Hz or 60 Hz modes (via V_CC or GND tie), and the oscillator remains fully functional with only V_CC, GND, and bypass capacitors (10 µF + 0.1 µF) as recommended in the application circuit.

How many analog input channels does the LTC2414CGN#TRPBF support, and are they differential?

The LTC2414CGN#TRPBF supports 8 analog input channels (CH0–CH7), configurable as either 8 single-ended inputs (with COM as common) or 4 differential pairs. Unlike the LTC2418, the LTC2414 does not connect CH8–CH15-this is explicitly stated in the Pin Functions section. Differential operation uses any two enabled channels as IN+ and IN−, with full-scale range of ±0.5 × V_REF, and DC common-mode rejection exceeding 140 dB.

What is the purpose of the FO pin on the LTC2414CGN#TRPBF, and how does it affect performance?

The FO (Frequency Control) pin on the LTC2414CGN#TRPBF selects the primary notch frequency of the digital filter: FO = V_CC configures 50 Hz rejection, FO = GND configures 60 Hz rejection, and FO driven by external clock (2.56–500 kHz) sets rejection at f_EOSC/2560. This directly determines line-frequency interference suppression-critical for accuracy in AC-powered industrial settings-and also sets conversion time (e.g., 130.86 ms typical at 60 Hz mode). No configuration registers are needed; behavior is hardware-defined.

Can the LTC2414CGN#TRPBF operate with a 2.7 V supply, and what impact does low VCC have on key specs?

Yes, the LTC2414CGN#TRPBF is fully specified from 2.7 V to 5.5 V. At 2.7 V, typical RMS noise increases to 0.375 ppm (vs. 0.183 ppm at 5 V), total unadjusted error remains ≤6 ppm of V_REF, and supply current drops to ~2 µA in sleep mode. All timing parameters-including conversion time and SCK frequency-scale with V_CC, and the 0.1–V_CC reference range remains valid, enabling true low-voltage sensor interfacing without level translation.