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Analog Devices Inc. LTC2418IGN#TRPBF
- Part No.:
- LTC2418IGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2418IGN#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,230
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Product details
Overview
LTC2418IGN#TRPBF 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–VCC differential reference input - used in high-precision industrial data acquisition systems requiring stable DC accuracy and 50/60Hz line rejection.
For engineers reviewing the LTC2418IGN#TRPBF datasheet, LTC2418IGN#TRPBF pinout, LTC2418IGN#TRPBF application, or LTC2418IGN#TRPBF equivalent, key selection considerations include its 28-pin SSOP package, –40°C to +85°C industrial temperature grade, 110 dB 50/60 Hz notch rejection, 200 µA active supply current, and SPI/MICROWIRE-compatible 4-wire interface with no external clock components required.
Technical Context
The LTC2418IGN#TRPBF implements a third-order delta-sigma modulator with decimating FIR filter and on-chip autocalibration that executes offset and full-scale correction every conversion cycle. Its digital filter achieves first nulls at 50 Hz (FO = VCC) or 60 Hz (FO = GND) without external components, enabling direct sensor digitization with guaranteed no missing codes and <140 dB DC common-mode rejection.
It supports dual operation modes: internal SCK output (SCK pin driven by internal oscillator at ~19.2 kHz) or external SCK input (up to 2 MHz), with configurable channel mapping (16 single-ended or 8 differential inputs). Input common mode voltage (VINCM) and reference common mode voltage (VREFCM) are independently set from GND to VCC, supporting remote sensing and bipolar measurement ranges of ±0.5·VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - ensures monotonicity and unambiguous code mapping across full input range. |
| INL | 2 ppm max over temperature - enables sub-µV-level linearity for precision weigh scales and strain gauge interfaces. |
| RMS Noise | 0.2 ppm of VREF - delivers effective resolution >21.5 bits in low-frequency industrial sensing applications. |
| Supply Current | 200 µA active / 4 µA autosleep - supports battery-powered portable instrumentation with minimal power budget impact. |
| Line Rejection | 110 dB min at 50/60 Hz ±2% - eliminates need for external notch filters in AC-coupled environments like factory floor monitoring. |
| Input Range | ±0.5·VREF bipolar differential - allows direct connection to bridge sensors without gain stages when VREF ≥ 2.0 V. |
| Reference Range | 0.1 V to VCC differential - supports ratiometric measurements using same supply as sensor excitation, improving system-level drift immunity. |
Pinout & Package
Package: 28-lead plastic SSOP (GN package), 5.6 mm × 10.2 mm, 0.635 mm pitch, –40°C to +85°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 21–28) | Analog input channel (positive) | Configurable as single-ended or differential inputs; CH0–CH7 accessible in all modes. |
| CH8–CH15 (Pins 1–8) | Analog input channel (positive) | Available only on LTC2418; not connected on LTC2414 - enables full 16-channel scan capability. |
| COM (Pin 10) | Common analog input (negative) | Serves as IN– for all single-ended channels; supports GND-to-VCC common-mode range independent of VREF. |
| REF+ / REF– (Pins 11/12) | Differential reference inputs | Accept 0.1 V to VCC differential voltage; enable true ratiometric measurement and remote sensing topologies. |
| FO (Pin 19) | Frequency control input | Selects internal 50 Hz (FO = VCC) or 60 Hz (FO = GND) notch; or accepts external 2.56–500 kHz oscillator for custom rejection frequencies. |
| CS (Pin 16) | Active-low chip select | Wakes device from sleep (4 µA) into conversion/data mode; aborts ongoing data transfer if toggled high mid-cycle. |
| SDO / SCK / SDI (Pins 17/18/20) | 3-wire serial interface | Full-duplex SPI/MICROWIRE-compatible interface; SCK direction (input/output) auto-detected at power-up or CS edge. |
Key Features
| Feature | Design Value |
|---|---|
| No latency architecture | Single-cycle digital filter settling ensures each conversion result corresponds exactly to the selected input - critical for fast multiplexed scanning without data invalidation. |
| Per-conversion autocalibration | Continuous offset and full-scale correction eliminates long-term drift and reduces calibration overhead in embedded systems. |
| Independent VINCM/VREFCM range | Both input and reference common-mode voltages adjustable from GND to VCC, enabling direct interfacing with isolated amplifiers or floating sensors. |
| Flexible channel configuration | Software-selectable 16 single-ended or 8 differential inputs - simplifies BOM consolidation across multiple sensor types (thermocouples, RTDs, load cells). |
| Integrated oscillator | Eliminates external crystal/capacitor requirements while maintaining 110 dB 50/60 Hz rejection - reduces PCB area and component count in space-constrained designs. |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
Use Scenario: High-resolution weighing in commercial and industrial platforms where repeatability and temperature stability are critical. IC Role / Device Role / Timing Role: Direct digitizer for Wheatstone bridge outputs; provides 24-bit resolution with <0.2 ppm RMS noise and 2 ppm INL for sub-gram accuracy. Use Value: Eliminates external instrumentation amplifier and discrete calibration circuitry - reduces total error budget and improves long-term zero stability. | Use Scenario: Structural health monitoring in bridges, cranes, and aerospace components using bonded foil or MEMS strain gauges. IC Role / Device Role / Timing Role: Precision analog front-end with programmable gain-free ratiometric measurement; handles ±10 mV/V bridge outputs directly. Use Value: 140 dB DC common-mode rejection and 110 dB 50/60 Hz rejection suppress environmental EMI without shielding or filtering. |
| Direct Temperature Measurement | Gas Analyzers |
Use Scenario: Cold-junction compensation and thermocouple linearization in process control transmitters. IC Role / Device Role / Timing Role: Simultaneous digitization of thermocouple voltage and reference junction temperature sensor (e.g., RTD on COM pin). Use Value: Single-chip solution replaces dual ADC + cold-junction IC; per-conversion calibration maintains <1°C accuracy over –40°C to +85°C. | Use Scenario: Electrochemical gas sensor readout in portable air quality monitors requiring ultra-low power and high SNR. IC Role / Device Role / Timing Role: Low-noise, micropower ADC for measuring nA-level sensor currents converted to voltage via precision transimpedance amplifier. Use Value: 4 µA autosleep current extends battery life to >1 year; 0.2 ppm RMS noise resolves sub-ppm gas concentration changes. |
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 |
|---|---|---|---|
| ADS124S08IPWR | 24-bit, 12-channel, SPI interface; 1.8–3.6V supply only; integrated PGA (1–128×); no internal oscillator - requires external clock for 50/60 Hz rejection. | Better suited for low-voltage battery systems with variable gain needs; lacks native 50/60 Hz notch without external timing source. | Choose ADS124S08IPWR when supply is <3.3V or programmable gain is required; LTC2418IGN#TRPBF preferred for 5V systems needing self-contained line rejection. |
| MAX11206ETL+ | 24-bit, 8-channel, I²C interface; 2.7–3.6V supply; 12 µA typical active current; 0.5 µVRMS noise; no integrated oscillator - relies on host MCU for timing. | I²C simplifies routing but limits speed; lower noise than LTC2418 at cost of higher power-supply sensitivity and no autonomous line rejection. | Choose MAX11206ETL+ for space-constrained I²C-based designs where host-controlled timing is acceptable; LTC2418IGN#TRPBF offers superior noise performance and autonomous operation. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2418IGN#TRPBF delivers unique integration of internal oscillator, 50/60 Hz notch, and wide 2.7–5.5V operation - reducing system-level design complexity and eliminating external timing components in industrial-grade sensor nodes.
Availability
LTC2418IGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and portable gas analyzers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC2418IGN#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 LTC2418IGN#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, engineered specifically for high-resolution, low-power, multichannel sensor digitization in harsh industrial environments - emphasizing DC accuracy, noise immunity, and ease of integration.
FAQ
What is the operating temperature range of the LTC2418IGN#TRPBF?
The LTC2418IGN#TRPBF is specified for operation from –40°C to +85°C, making it suitable for industrial environments including factory automation, outdoor instrumentation, and embedded control systems. This I-grade temperature rating is confirmed in the official Linear Technology (now Analog Devices) datasheet revision 241418fb, Table "Order Information" and "Operating Temperature Range".
Does the LTC2418IGN#TRPBF require external passive components for its internal oscillator?
No, the LTC2418IGN#TRPBF does not require external passive components for its internal oscillator. As stated in the datasheet (page 1), "The internal oscillator requires no external frequency setting components." This enables immediate 50 Hz or 60 Hz line rejection without crystals, capacitors, or resistors - a key differentiator for simplified, high-reliability designs.
How many analog input channels does the LTC2418IGN#TRPBF support in differential mode?
The LTC2418IGN#TRPBF supports 8 differential input channels (CH0–CH1 paired through CH14–CH15), as confirmed in the "Features" section (page 1): "8-/16-Channel 24-Bit No Latency ∆Σ™ ADCs" and "4-/8-Channel Differential Inputs (LTC2414/LTC2418)". The LTC2418 variant enables all 16 channels, whereas the LTC2414 supports only CH0–CH7.
What is the maximum allowed reference voltage range for the LTC2418IGN#TRPBF?
The LTC2418IGN#TRPBF accepts a differential reference voltage (VREF = REF+ – REF–) from 0.1 V to VCC, as specified in the "Analog Input and Reference" table (page 4). This wide range supports ratiometric configurations using the same supply rail as sensor excitation, improving system-level drift performance without requiring dedicated reference ICs.
Can the LTC2418IGN#TRPBF operate with a 3.3V supply voltage?
Yes, the LTC2418IGN#TRPBF operates over a supply range of 2.7 V to 5.5 V, fully including 3.3 V. Electrical characteristics such as 200 µA supply current, 2 ppm INL, and 0.2 ppm RMS noise are guaranteed across this entire range per the "Power Requirements" and "Converter Characteristics" tables (pages 5–3). It is commonly deployed in 3.3 V industrial microcontroller systems.
LTC2418IGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2418IGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2418IGN#TRPBF 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#TRPBF reliable?
The price and inventory of LTC2418IGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2418IGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2418IGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2418IGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2418IGN#TRPBF?
LTC2418IGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2418IGN#TRPBF 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#TRPBF?
For technical support, including LTC2418IGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2418IGN#TRPBF requirements.
6.How does Aetrix verify that LTC2418IGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2418IGN#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2418IGN#TRPBF?
All LTC2418IGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2418IGN#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC2418IGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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