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Analog Devices Inc. LTC2400CS8#PBF
- Part No.:
- LTC2400CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC2400CS8#PBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,688
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Product details
Overview
LTC2400CS8#PBF from Analog Devices (formerly Linear Technology) is a 24-bit micropower delta-sigma analog-to-digital converter in SO-8 package, featuring no-latency conversion, 4ppm INL, 0.3ppm RMS noise, and integrated 50/60Hz notch filtering - used for high-precision weight scales, strain-gage transducers, and industrial process control.
For engineers reviewing the LTC2400CS8#PBF datasheet, LTC2400CS8#PBF pinout, LTC2400CS8#PBF application, or LTC2400CS8#PBF equivalent, key selection criteria include single-cycle settling time for multiplexed sensors, live-zero extended input range (–12.5% to +112.5% VREF), internal oscillator eliminating external timing components, and SPI/MICROWIRE-compatible 3-wire interface.
Technical Context
The LTC2400CS8#PBF employs a delta-sigma architecture with on-chip decimating FIR filter and auto-calibrating offset/full-scale correction every conversion cycle. Its digital filter provides ≥110dB rejection at 50Hz or 60Hz ±2% depending on FO pin state, and supports external oscillator frequencies from 2.56kHz to 307.2kHz for user-defined notch placement at fEOSC/2560.
It operates from 2.7V to 5.5V supply, accepts reference voltages from 0.1V to VCC, and delivers true 24-bit resolution with no missing codes. Input range extends from –0.125·VREF to +1.125·VREF, enabling seamless interfacing with sensor front-ends exhibiting offset or overrange conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full code coverage across entire input range. |
| INL | 4ppm of VREF at 5V reference - enables ≤1 LSB error in 24-bit span (±8.3M codes) for precision instrumentation. |
| Offset Error | 0.5ppm of VREF - contributes <0.000012% of full-scale error, critical for zero-stability in weigh scale applications. |
| RMS Noise | 0.3ppm of VREF - ~1.5µVRMS at 5V reference, supporting sub-microvolt signal resolution. |
| Supply Current | 200µA in conversion mode, 20µA in sleep - enables battery-powered operation for >1 year with typical duty cycling. |
| Notch Rejection | ≥110dB at 50Hz or 60Hz ±2% - eliminates mains interference without external filtering or software averaging. |
| Reference Range | 0.1V to VCC - allows low-voltage references (e.g., 1.25V bandgap) while maintaining 24-bit ENOB. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 150 mil width, JEDEC MS-012AC, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | 2.7V–5.5V operation; requires local 10µF tantalum + 0.1µF ceramic bypass to GND for stable conversion. |
| VREF (Pin 2) | Reference voltage input | Accepts 0.1V–VCC; defines full-scale range and noise floor; leakage ≤10nA ensures minimal loading. |
| VIN (Pin 3) | Analog input | Supports –0.125·VREF to +1.125·VREF range; absolute max –0.3V to VCC+0.3V; 10pF sampling capacitance. |
| GND (Pin 4) | Ground reference | Single-point analog/digital/reference ground; must connect directly to low-impedance ground plane. |
| CS (Pin 5) | Active-low chip select | Wakes ADC from sleep (CS=LOW); disables SDO output (CS=HIGH); controls data transfer initiation/abort. |
| SDO (Pin 6) | 3-state serial data output | Outputs 32-bit frame (4 status + 24 result + 4 sub-LSB bits); EOC bit (Bit 31) available real-time during sleep. |
| SCK (Pin 7) | Bidirectional serial clock | Auto-configures as output (internal clock mode) or input (external clock mode) based on power-up SCK state. |
| FO (Pin 8) | Frequency control input | Selects 60Hz rejection (FO=GND), 50Hz rejection (FO=VCC), or external oscillator mode (FO=signal). |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Each 32-bit output corresponds exactly to the most recent completed conversion - eliminates filter delay in multiplexed sensor systems. |
| Live-zero extended input range | –12.5% to +112.5% VREF accommodates pre-amplifier offsets and overrange transients without clipping or recalibration. |
| Auto-calibration per cycle | Continuous offset and full-scale correction ensures long-term stability against temperature drift, supply variation, and aging. |
| Integrated oscillator | Eliminates crystals, capacitors, or external clocks - reduces BOM count and layout complexity while guaranteeing 110dB line rejection. |
| Flexible 3-wire interface | Hardware-configurable SPI/MICROWIRE compatibility with no register programming required - simplifies firmware integration. |
Applications
| Weight Scales | Strain-Gage Transducers |
|---|---|
|
Use Scenario: High-resolution digital weighing systems measuring loads from grams to tons with temperature-compensated load cells. IC Role / Device Role / Timing Role: Primary ADC capturing mV-level bridge outputs; uses extended input range to absorb amplifier offset and thermal drift. Use Value: 24-bit resolution and 0.5ppm offset error enable 1:10M dynamic range - sufficient for Class III legal-for-trade metrology. |
Use Scenario: Industrial force and pressure sensing using Wheatstone bridge configurations with gain/offset trimming. IC Role / Device Role / Timing Role: Precision digitizer for low-frequency (<10Hz) bridge signals; leverages 110dB 50/60Hz rejection to suppress ambient EMI. Use Value: Internal auto-calibration maintains accuracy over –40°C to +85°C without system-level recalibration cycles. |
| Gas Analyzers | Industrial Process Control |
|
Use Scenario: Electrochemical or NDIR gas sensors requiring stable baseline tracking and ppm-level concentration resolution. IC Role / Device Role / Timing Role: Low-noise front-end ADC for slow-drift sensor outputs; uses 0.3ppm RMS noise to resolve sub-µV changes. Use Value: Single-supply 2.7V operation enables direct integration with low-power sensor modules and battery-backed designs. |
Use Scenario: PLC analog input modules acquiring temperature, flow, and level signals in factory automation environments. IC Role / Device Role / Timing Role: Isolated channel ADC with live-zero range handling sensor calibration mismatches and wiring faults. Use Value: 200µA active current and 20µA sleep mode reduce thermal load in densely packed I/O racks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit, 4kSPS, integrated PGA and burn-out current sources; requires external reference; SPI-only interface. | Better suited for multi-channel sensor arrays with programmable gain; lacks live-zero input range and internal oscillator. | Choose ADS124S08IPW when PGA flexibility and channel count outweigh need for self-contained timing and extended range. |
| MAX11200EEE+ | 24-bit, 10SPS, 110dB 50/60Hz rejection, but no internal oscillator - requires external crystal or clock source. | Similar noise and line rejection, but higher layout complexity due to external timing components and tighter reference requirements. | Choose MAX11200EEE+ only if existing system already provides a stable 1MHz clock and board space permits crystal placement. |
Compared with LTC2400CS8#PBF, ADS124S08IPW adds signal conditioning at the cost of increased configuration overhead, while MAX11200EEE+ matches core performance but shifts timing responsibility to the system designer - making LTC2400CS8#PBF optimal for rapid, low-complexity precision ADC deployment.
Availability
LTC2400CS8#PBF is available at Aetrix Electronics and suitable for weight scales, strain-gage transducers, gas analyzers, and industrial process control systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LTC2400CS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
LTC2400CS8#PBF belongs to ADI's legacy Linear Technology precision ADC portfolio, designed specifically for ultra-low-power, high-accuracy measurement applications where simplicity, stability, and noise immunity are paramount.
FAQ
What is the operating temperature range for LTC2400CS8#PBF?
The LTC2400CS8#PBF is rated for 0°C to 70°C (Commercial grade). Its specifications - including 4ppm INL, 0.5ppm offset, and ≥110dB line rejection - are guaranteed across this full range. The device uses on-chip auto-calibration to maintain accuracy despite temperature-induced drift, making LTC2400CS8#PBF suitable for uncontrolled indoor industrial environments.
Does LTC2400CS8#PBF require external passive components for basic operation?
No - LTC2400CS8#PBF requires only two external bypass capacitors (10µF tantalum + 0.1µF ceramic on VCC) and no external timing components. Its integrated oscillator eliminates crystals or RC networks, and its 3-wire interface needs no pull-ups or level shifters for standard 3.3V/5V microcontrollers. This makes LTC2400CS8#PBF ideal for space-constrained, low-BOM designs.
How does the FO pin configure line frequency rejection in LTC2400CS8#PBF?
In LTC2400CS8#PBF, connecting FO to GND selects 60Hz ±2% notch filtering, while connecting FO to VCC selects 50Hz ±2%. The internal oscillator automatically adjusts its frequency to place the first digital filter null at the selected line frequency. This hardware-based selection requires no software configuration and remains effective across the full operating temperature range.
What is the meaning of the "live zero" input range in LTC2400CS8#PBF?
The "live zero" range in LTC2400CS8#PBF refers to its ability to accept inputs from –0.125·VREF to +1.125·VREF - extending 12.5% below and above the nominal 0V–VREF span. This accommodates sensor amplifier offsets, wiring errors, or transient overloads without saturation, ensuring continuous valid conversion data - a key advantage of LTC2400CS8#PBF in field-deployed instrumentation.
Can LTC2400CS8#PBF operate with a 1.25V reference voltage?
Yes - LTC2400CS8#PBF supports reference voltages as low as 0.1V, so a 1.25V precision reference is fully compatible. At 1.25V, the input range becomes –0.156V to +1.406V, and RMS noise remains ~1.5µVRMS, preserving effective resolution. However, INL improves (scaling with VREF), making LTC2400CS8#PBF especially valuable in low-voltage, low-power sensor nodes.
LTC2400CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 7.5
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- 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:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2400CS8#PBF FAQ
1.How can I place an order for LTC2400CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2400CS8#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 LTC2400CS8#PBF reliable?
The price and inventory of LTC2400CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2400CS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC2400CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2400CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2400CS8#PBF?
LTC2400CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2400CS8#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 LTC2400CS8#PBF?
For technical support, including LTC2400CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2400CS8#PBF requirements.
6.How does Aetrix verify that LTC2400CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2400CS8#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 LTC2400CS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC2400CS8#PBF?
All LTC2400CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2400CS8#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 LTC2400CS8#PBF part is unused and in its original packaging.
Return procedure for LTC2400CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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