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Home > Products > Integrated Circuits (ICs) > Data Acquisition > Analog to Digital Converters (ADC)

Analog Devices Inc. LTC2418IGN#PBF

Name: LTC2418IGN#PBF
Brand: Analog Devices Inc.
SKU: LTC2418IGN#PBF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LTC2418IGN#PBF

Manufacturer:: Analog Devices Inc.

Category:: Analog to Digital Converters (ADC)

Package:: 28-SSOP (0.154", 3.90mm Width)

Datasheet:: LTC2418IGN#PBF.pdf

Description:: IC ADC 24BIT SIGMA-DELTA 28SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

LTC2418IGN#PBF from Analog Devices (formerly Linear Technology) is a 16-channel (8-differential), 24-bit no-latency delta-sigma ADC with integrated oscillator, 2 ppm INL, 0.2 ppm RMS noise, and single-cycle settling. It operates from 2.7V to 5.5V and supports flexible ratiometric sensing via 0.1V–V_CC differential reference input - ideal for high-precision industrial weight scales and strain gauge transducers.

For engineers reviewing the LTC2418IGN#PBF datasheet, LTC2418IGN#PBF pinout, LTC2418IGN#PBF application, or LTC2418IGN#PBF equivalent, key selection criteria include its 110 dB 50/60 Hz notch rejection, ±0.5·V_REF bipolar input range, GND-to-V_CC common-mode flexibility, 200 µA active supply current, and SPI/MICROWIRE-compatible 4-wire interface.

Technical Context

The LTC2418IGN#PBF implements a 3rd-order delta-sigma modulator with decimating FIR filter and on-chip autocalibration that performs offset and full-scale correction in every conversion cycle. Its digital filter achieves first nulls at 50 Hz (FO = V_CC) or 60 Hz (FO = GND), or user-defined frequencies when driven by external oscillator (f_EOSC/2560).

It supports dual operation modes: internal SCK output (SCK pin driven) or external SCK input (SCK pin clocked), selected automatically at power-up or CS falling edge. Channel selection is dynamically updated via SDI during data output, enabling real-time multiplexer reconfiguration without interrupting conversion flow.

Key Specifications

Parameter	Value and Actual Design Meaning
Resolution	24-bit with no missing codes - guarantees monotonicity and unambiguous code mapping across full input range.
INL	2 ppm of V_REF - ensures ≤±0.0002% linearity error over temperature, critical for metrology-grade measurements.
RMS Noise	0.2 ppm of V_REF - enables sub-microvolt resolution in low-frequency sensor applications (e.g., thermocouples, load cells).
Supply Current	200 µA in conversion mode, 4 µA in autosleep - supports battery-powered portable instrumentation with long runtime.
Input Range	±0.5·V_REF bipolar differential - allows direct digitization of bridge outputs without external gain/level-shift circuitry.
Common-Mode Range	GND to V_CC for both inputs and reference - simplifies interfacing with sensors operating at arbitrary bias points.
Notch Rejection	≥110 dB at 50 Hz or 60 Hz ±2% - eliminates mains interference without external filtering or software post-processing.

Pinout & Package

28-lead plastic SSOP (GN package), RoHS-compliant, –40°C to +85°C operating temperature range.

Pin/Terminal	Circuit Role	Design Meaning
CH0–CH15 (Pins 1–8, 21–28)	Analog multiplexer inputs	Support 16 single-ended or 8 differential channels; CH8–CH15 unconnected on LTC2414 only - fully functional on LTC2418IGN#PBF.
COM (Pin 10)	Common negative input	Serves as IN– for all single-ended configurations; voltage range extends beyond rails (GND–0.3V to V_CC+0.3V).
REF+, REF– (Pins 11, 12)	Differential reference inputs	Accept 0.1V–V_CC differential reference; enable true ratiometric measurement and remote sensing.
FO (Pin 19)	Frequency control input	Selects 50 Hz (FO=V_CC), 60 Hz (FO=GND), or custom notch (external f_EOSC) - no external components required.
CS (Pin 16)	Active-low chip select	Wakes device from sleep (CS=LOW); aborts data transfer and triggers new conversion if pulled HIGH mid-transfer.
SDO, SCK, SDI (Pins 17, 18, 20)	4-wire serial interface	SPI/MICROWIRE-compatible; SCK bidirectional (input/output depending on mode); SDO three-state with status indication during sleep.

Key Features

Feature	Design Value
No-latency digital filter	Single-cycle settling ensures each output corresponds directly to its input sample - eliminates timing uncertainty in multiplexed systems.
Per-conversion autocalibration	Continuous offset and full-scale correction removes drift due to temperature, supply variation, and aging - no manual recalibration needed.
Flexible reference architecture	Differential REF+ and REF– accept any 0.1V–V_CC span and independent common-mode voltages - enables direct connection to Wheatstone bridges and isolated sensors.
Ultra-low power sleep mode	4 µA quiescent current with conversion result retained indefinitely in static shift register - ideal for event-triggered sensing.
DC common-mode rejection	Better than 140 dB - rejects errors from ground offsets, PCB leakage, and mismatched trace impedances in high-impedance sensor interfaces.

Applications

Weight Scales	Strain Gauge Transducers
Use Scenario: High-resolution weighing in commercial and industrial platforms requiring NTEP or OIML certification. IC Role / Device Role / Timing Role: Direct digitizer for millivolt-level bridge outputs; provides 24-bit resolution with <2 ppm INL and 0.2 ppm noise floor. Use Value: Eliminates need for external instrumentation amplifiers and analog filtering - reduces BOM cost and board area while improving long-term stability.	Use Scenario: Structural health monitoring and precision force measurement in test benches and aerospace systems. IC Role / Device Role / Timing Role: 16-channel ADC capturing synchronized strain readings from multi-point sensor arrays with 50/60 Hz mains rejection. Use Value: Enables simultaneous acquisition across multiple gauges with deterministic latency and no inter-channel crosstalk penalties.
Direct Temperature Measurement	Gas Analyzers
Use Scenario: Cold-junction compensation and thermocouple digitization in process control and laboratory equipment. IC Role / Device Role / Timing Role: Ratiometric ADC accepting thermocouple voltage referenced to RTD-based cold-junction sensor. Use Value: Achieves <0.1°C accuracy without external cold-junction compensation ICs or lookup tables - simplifies firmware and calibration.	Use Scenario: Electrochemical gas sensor signal conditioning in portable air quality monitors and industrial safety systems. IC Role / Device Role / Timing Role: Low-noise, high-PSRR ADC digitizing picoamp-level current outputs from gas-sensitive electrodes. Use Value: 140 dB DC common-mode rejection suppresses EMI from switching power supplies; 200 µA supply enables multi-day battery life.

Weight Scales

Strain Gauge Transducers

Use Scenario: High-resolution weighing in commercial and industrial platforms requiring NTEP or OIML certification.

IC Role / Device Role / Timing Role: Direct digitizer for millivolt-level bridge outputs; provides 24-bit resolution with <2 ppm INL and 0.2 ppm noise floor.

Use Value: Eliminates need for external instrumentation amplifiers and analog filtering - reduces BOM cost and board area while improving long-term stability.

Use Scenario: Structural health monitoring and precision force measurement in test benches and aerospace systems.

IC Role / Device Role / Timing Role: 16-channel ADC capturing synchronized strain readings from multi-point sensor arrays with 50/60 Hz mains rejection.

Use Value: Enables simultaneous acquisition across multiple gauges with deterministic latency and no inter-channel crosstalk penalties.

Direct Temperature Measurement

Gas Analyzers

Use Scenario: Cold-junction compensation and thermocouple digitization in process control and laboratory equipment.

IC Role / Device Role / Timing Role: Ratiometric ADC accepting thermocouple voltage referenced to RTD-based cold-junction sensor.

Use Value: Achieves <0.1°C accuracy without external cold-junction compensation ICs or lookup tables - simplifies firmware and calibration.

Use Scenario: Electrochemical gas sensor signal conditioning in portable air quality monitors and industrial safety systems.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR ADC digitizing picoamp-level current outputs from gas-sensitive electrodes.

Use Value: 140 dB DC common-mode rejection suppresses EMI from switching power supplies; 200 µA supply enables multi-day battery life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ADS1256IDBT	8-channel, 24-bit, 30 kSPS; requires external crystal; 7 nV/√Hz noise; no built-in 50/60 Hz notch.	Higher speed but lacks integrated line-frequency rejection - demands external digital filtering or synchronous sampling.	Choose ADS1256IDBT when system clock is already available and higher throughput (>10 SPS) is required.
MAX11206ETJ+	8-channel, 24-bit, 120 SPS; internal oscillator; 0.5 µV_RMS noise; 105 dB 50/60 Hz rejection.	Lower channel count (8 vs 16) and reduced notch depth - less effective in high-noise industrial environments.	Choose MAX11206ETJ+ for space-constrained designs where 8 channels suffice and lower cost is prioritized.

Compared with ADS1256IDBT and MAX11206ETJ+, the LTC2418IGN#PBF uniquely delivers 16-channel capability, 110 dB line-frequency rejection without external components, and per-conversion autocalibration - making it optimal for metrology-grade, low-power, multi-sensor systems where long-term accuracy and design simplicity are critical.

Availability

LTC2418IGN#PBF is available at Aetrix Electronics and suitable for weight scales, strain gauge transducers, and direct temperature measurement systems requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term calibration integrity.

Supply support for LTC2418IGN#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 acquired Linear Technology in 2017 and maintains its legacy of high-precision analog ICs for demanding measurement applications.

The LTC2418IGN#PBF belongs to Linear's no-latency delta-sigma ADC family, designed specifically for high-resolution, low-power, multi-channel sensor digitization in industrial, scientific, and instrumentation systems.

FAQ

What is the maximum number of analog input channels supported by the LTC2418IGN#PBF?

The LTC2418IGN#PBF supports up to 16 single-ended or 8 differential analog input channels. Pins CH0–CH15 are fully connected and functional, distinguishing it from the pin-compatible LTC2414 which disables CH8–CH15. This 16-channel capability enables dense sensor array digitization without external multiplexers.

Does the LTC2418IGN#PBF require external passive components for its internal oscillator to operate?

No, the LTC2418IGN#PBF requires no external frequency-setting components for its internal oscillator. The oscillator is fully integrated and self-contained; connecting FO to V_CC or GND configures 50 Hz or 60 Hz notch rejection respectively - eliminating crystals, capacitors, or resistors traditionally needed for precision timing.

How does the LTC2418IGN#PBF achieve 110 dB 50/60 Hz rejection without external filters?

The LTC2418IGN#PBF achieves ≥110 dB 50/60 Hz rejection through its on-chip decimating FIR filter synchronized to its highly stable internal oscillator. When FO is tied to V_CC or GND, the digital filter's first null is precisely placed at 50 Hz or 60 Hz ±2%, rejecting mains interference inherently - no external analog or digital filtering is required.

Can the LTC2418IGN#PBF interface directly with a 0.5 V reference voltage?

Yes, the LTC2418IGN#PBF accepts differential reference voltages from 0.1 V to V_CC, so a 0.5 V reference is fully supported. With V_REF = 0.5 V, the full-scale bipolar input range becomes ±0.25 V, and the 0.2 ppm RMS noise translates to ~1 nV_RMS - enabling ultra-low-voltage sensor digitization with exceptional dynamic range.

What is the function of the COM pin on the LTC2418IGN#PBF, and how does it differ from GND?

The COM pin on the LTC2418IGN#PBF serves as the common negative input (IN–) for all single-ended channel configurations. Unlike GND, COM can be biased anywhere between GND–0.3 V and V_CC+0.3 V, allowing direct interface with sensors whose output common-mode voltage differs from system ground - such as isolated bridge circuits or floating thermocouples.

LTC2418IGN#PBF Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: microPOWER™

Package/Case:: 28-SSOP (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Active

Number of Bits:: 24

Sampling Rate (Per Second):: 7.5

Number of Inputs:: 8, 16

Input Type:: Differential, Single Ended

Data Interface:: SPI

Configuration:: MUX-ADC

Ratio - S/H:ADC:: -

Number of A/D Converters:: 1

Architecture:: Sigma-Delta

Reference Type:: External

Voltage - Supply, Analog:: 2.7V ~ 5.5V

Voltage - Supply, Digital:: 2.7V ~ 5.5V

Features:: -

Operating Temperature:: -40°C ~ 85°C

Supplier Device Package:: 28-SSOP

Mounting Type:: Surface Mount

Grade:: -

Qualification:: -

LTC2418IGN#PBF FAQ

1.How can I place an order for LTC2418IGN#PBF through Aetrix?

Please submit a Request for Quotation (RFQ) for LTC2418IGN#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for LTC2418IGN#PBF reliable?

The price and inventory of LTC2418IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2418IGN#PBF is usually 5 days.

3.What payment methods are accepted for LTC2418IGN#PBF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2418IGN#PBF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LTC2418IGN#PBF?

LTC2418IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LTC2418IGN#PBF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for LTC2418IGN#PBF?

For technical support, including LTC2418IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2418IGN#PBF requirements.

6.How does Aetrix verify that LTC2418IGN#PBF is sourced from the original manufacturer or authorized distributors?

All LTC2418IGN#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC2418IGN#PBF meets industry standards.

7.What is the process for return or replacement of LTC2418IGN#PBF?

All LTC2418IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2418IGN#PBF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The LTC2418IGN#PBF part is unused and in its original packaging.

Return procedure for LTC2418IGN#PBF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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