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Analog Devices Inc. LTC2418CGN#TRPBF
- Part No.:
- LTC2418CGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC2418CGN#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 28SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,022
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Product details
Overview
LTC2418CGN#TRPBF from Analog Devices (formerly Linear Technology) is a 16-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 precision measurement. It operates from 2.7V to 5.5V and supports flexible ratiometric sensing via differential reference input (0.1V–VCC), making it ideal for high-accuracy industrial sensor digitization.
For engineers reviewing the LTC2418CGN#TRPBF datasheet, LTC2418CGN#TRPBF pinout, LTC2418CGN#TRPBF application, or LTC2418CGN#TRPBF equivalent, key selection criteria include its 16-channel single-ended / 8-channel differential input capability, 110 dB 50/60 Hz notch rejection, internal oscillator eliminating external timing components, and guaranteed no missing codes across full temperature range (0°C to 70°C).
Technical Context
The LTC2418CGN#TRPBF implements a third-order delta-sigma modulator with decimating FIR filter and on-chip autocalibration that executes offset and full-scale correction in every conversion cycle. Its digital filter nulls at 50 Hz (FO = VCC) or 60 Hz (FO = GND), or at fEOSC/2560 when driven externally - enabling precise line-frequency rejection without external components.
It uses a 4-wire SPI/MICROWIRE-compatible interface with bidirectional SCK (internal clock output or external clock input), active-low CS for sleep/wake control, and SDI/SDO for channel address input and 32-bit result output. Input common mode rejection exceeds 140 dB DC and 140 dB at 50/60 Hz, while reference common mode rejection reaches 140 dB DC.
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 of VREF - enables ±1 LSB error over 24-bit span, critical for metrology-grade accuracy. |
| RMS Noise | 0.2 ppm of VREF - supports sub-microvolt resolution in low-frequency sensor applications. |
| Supply Range | 2.7V to 5.5V - allows direct operation from standard industrial rails (3.3V, 5V) without LDO overhead. |
| Input Channels | 16 single-ended or 8 differential - provides scalable analog front-end for multi-sensor systems without external MUX. |
| Notch Rejection | ≥110 dB at 50/60 Hz ±2% - eliminates mains interference in weigh scales, strain gauges, and process transmitters. |
| Conversion Current | 200 µA typical - enables battery-powered or energy-constrained designs with <1 mW power at 5V. |
| Sleep Current | 4 µA - reduces standby power by >98% versus active mode, extending system battery life. |
Pinout & Package
Package: 28-lead plastic SSOP (GN package), 0°C to 70°C operating temperature range.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7 (Pins 21–28) | Analog input (single-ended or differential +) | First 8 channels; configurable as IN+ in differential pairs with COM or CH8–CH15. |
| CH8–CH15 (Pins 1–8) | Analog input (single-ended or differential +) | Second 8 channels; not connected on LTC2414, fully functional on LTC2418CGN#TRPBF. |
| COM (Pin 10) | Common analog input (IN− for single-ended) | Serves as shared negative input for all single-ended channels; supports GND-to-VCC common mode range. |
| REF+ / REF− (Pins 11/12) | Differential reference inputs | Accept 0.1V–VCC differential voltage; enable true ratiometric measurement and remote sensing. |
| FO (Pin 19) | Frequency control input | Selects 50 Hz (FO = VCC), 60 Hz (FO = GND), or user-defined notch (external oscillator). |
| CS (Pin 16) | Active-low chip select | Wakes device from 4 µA sleep; initiates data transfer; falling edge triggers new conversion if asserted mid-cycle. |
| SDO (Pin 17) | 3-state serial data output | Outputs 32-bit conversion result; high-Z when CS = HIGH; indicates conversion status during Sleep/Convert states. |
| SCK (Pin 18) | Bidirectional serial clock | Outputs internal clock (19.2 kHz) or accepts external clock (2.56–500 kHz); mode auto-detected at power-up or CS fall. |
| SDI (Pin 20) | Serial data input | Shifts in 4-bit channel address during data output; must be held static during Sleep/Convert states. |
Key Features
| Feature | Design Value |
|---|---|
| No latency, single-cycle settling | Each conversion yields an accurate, settled result immediately - eliminates filter delay in multiplexed channel switching. |
| Integrated oscillator | Removes need for crystals, capacitors, or external clocks - reduces BOM count and layout sensitivity. |
| Autocalibration per conversion | Continuous offset and full-scale correction ensures stability over time, temperature, and supply variation - no manual recalibration required. |
| GND-to-VCC input common mode | Supports direct connection to sensors with wide common-mode swing (e.g., bridge transducers, thermocouples) without level-shifting circuitry. |
| Flexible reference interface | Differential REF+/REF− accepts 0.1V–VCC range and independent common-mode settings - enables remote sensing and ratiometric accuracy. |
| 140 dB DC input CMR | Rejects common-mode interference from noisy industrial environments - preserves signal integrity in harsh EMI conditions. |
Applications
| Weight Scales | Strain Gauge Transducers |
|---|---|
Use Scenario: High-resolution weighing in commercial and industrial platforms using load cells with mV/V output. IC Role / Device Role / Timing Role: Direct digitizer for bridge sensor outputs; performs ratiometric conversion referenced to excitation voltage. Use Value: 24-bit resolution and 0.2 ppm noise enable <1 mg resolution on 10 kg platform; 110 dB 50/60 Hz rejection suppresses mains-coupled interference. | Use Scenario: Precision force and pressure measurement in test equipment and structural monitoring. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC capturing microvolt-level bridge imbalances under varying thermal conditions. Use Value: Autocalibration per conversion maintains ±2 ppm full-scale stability over –40°C to 85°C; 140 dB CMR rejects common-mode noise from long cable runs. |
| Direct Temperature Measurement | Gas Analyzers |
Use Scenario: Cold-junction compensation and thermocouple digitization in HVAC and process control. IC Role / Device Role / Timing Role: Simultaneous acquisition of thermocouple voltage and reference junction temperature via on-chip sensor or external RTD. Use Value: Bipolar input range (–0.5×VREF to +0.5×VREF) accommodates thermocouple polarity reversal; 2 ppm INL ensures traceable calibration. | Use Scenario: Electrochemical gas sensor signal conditioning in portable and fixed-location analyzers. IC Role / Device Role / Timing Role: High-precision, low-power ADC for measuring nanoamp-level sensor currents converted to voltage via TIA. Use Value: 4 µA sleep current extends battery life in handheld units; 24-bit resolution resolves sub-ppm gas concentration changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-resolution delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1256IDBT | 24-bit, 30 kSPS, 8-channel, SPI interface; requires external crystal; 7 nV/√Hz noise (higher than LTC2418's 0.2 ppm RMS). | Higher speed but lower noise efficiency; lacks integrated 50/60 Hz notch; needs external clock and reference buffer. | Choose for higher throughput (>10 SPS) where external timing is acceptable and noise floor < 1 µV RMS is sufficient. |
| MAX11206ETL+ | 24-bit, 10 SPS, 8-channel, internal oscillator; 0.15 µV RMS noise; 105 dB 50/60 Hz rejection; SPI interface. | Lower notch rejection (105 dB vs 110+ dB); smaller 20-pin TQFN package; no COM pin - requires external MUX for single-ended use. | Choose for space-constrained designs needing ultra-low noise and moderate rejection; verify COM functionality not required. |
Compared with ADS1256IDBT and MAX11206ETL+, the LTC2418CGN#TRPBF delivers superior 50/60 Hz rejection (≥110 dB), true 16-channel flexibility with integrated COM, and guaranteed no missing codes - making it optimal for metrology-grade, mains-immune industrial sensing where absolute accuracy and ease of use outweigh raw speed.
Availability
LTC2418CGN#TRPBF is available at Aetrix Electronics and suitable for weight scales, strain gauge transducers, and direct temperature measurement requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC2418CGN#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, renowned for high-performance data converters, amplifiers, and power management ICs.
The LTC2418CGN#TRPBF belongs to Linear's No Latency Delta-Sigma ADC family, designed specifically for high-accuracy, low-power, multiplexed sensor digitization in industrial instrumentation and process control where calibration stability and line-frequency immunity are critical.
FAQ
What is the operating temperature range for the LTC2418CGN#TRPBF?
The LTC2418CGN#TRPBF is specified for 0°C to 70°C ambient operation (Commercial grade). This is confirmed by the "C" suffix in the part number and the Order Information table, which lists LTC2418CGN#TRPBF under the 0°C to 70°C temperature range. The device's electrical characteristics - including INL, noise, and CMR - are guaranteed across this full range.
Does the LTC2418CGN#TRPBF require external passive components for its internal oscillator?
No, the LTC2418CGN#TRPBF does not require any external passive components for its internal oscillator. As stated in the Features section and Pin Functions description, the internal oscillator is fully integrated and needs no crystals, capacitors, or resistors - simplifying design and improving reliability. External oscillator mode is optional and only used when custom notch frequency is required.
How many analog input channels does the LTC2418CGN#TRPBF support in single-ended mode?
The LTC2418CGN#TRPBF supports 16 single-ended analog input channels (CH0 through CH15), as explicitly defined in the Pin Functions section and confirmed by the top-view pinout showing CH0–CH7 (Pins 21–28) and CH8–CH15 (Pins 1–8). This distinguishes it from the LTC2414, where CH8–CH15 pins are not connected.
What is the function of the COM pin on the LTC2418CGN#TRPBF?
The COM pin (Pin 10) serves as the common negative input (IN−) for all single-ended channel configurations on the LTC2418CGN#TRPBF. It enables true single-ended operation with GND-to-VCC common-mode range, allowing direct connection to sensors like strain gauges or thermocouples without level-shifting circuitry - a key feature distinguishing it from pseudo-differential architectures.
Can the LTC2418CGN#TRPBF achieve 110 dB rejection at both 50 Hz and 60 Hz simultaneously?
No, the LTC2418CGN#TRPBF achieves ≥110 dB rejection at either 50 Hz or 60 Hz - selected by the FO pin logic level (FO = VCC for 50 Hz, FO = GND for 60 Hz). The datasheet specifies "better than 110dB differential mode rejection at 50Hz or 60Hz ±2%", confirming mutually exclusive configuration. Simultaneous dual-notch requires external digital filtering.
LTC2418CGN#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 28-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2418CGN#TRPBF FAQ
1.How can I place an order for LTC2418CGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2418CGN#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 LTC2418CGN#TRPBF reliable?
The price and inventory of LTC2418CGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2418CGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2418CGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2418CGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2418CGN#TRPBF?
LTC2418CGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2418CGN#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 LTC2418CGN#TRPBF?
For technical support, including LTC2418CGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2418CGN#TRPBF requirements.
6.How does Aetrix verify that LTC2418CGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2418CGN#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 LTC2418CGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2418CGN#TRPBF?
All LTC2418CGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2418CGN#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 LTC2418CGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC2418CGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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