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Analog Devices Inc. LTC2400IS8#TRPBF
- Part No.:
- LTC2400IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC2400IS8#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,793
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Product details
Overview
LTC2400IS8#TRPBF 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 precision weight scales, strain-gage transducers, and industrial process control where high-resolution DC measurement is critical.
For engineers reviewing the LTC2400IS8#TRPBF datasheet, LTC2400IS8#TRPBF pinout, LTC2400IS8#TRPBF application, or LTC2400IS8#TRPBF equivalent, key selection considerations 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 with EOC signaling.
Technical Context
The LTC2400IS8#TRPBF employs a delta-sigma modulator with decimating FIR filter and auto-calibrating architecture that performs offset and full-scale calibration every conversion cycle. Its digital filter provides ≥110dB rejection at 50Hz or 60Hz ±2% depending on FO pin state, or configurable notch at fEOSC/2560 when driven by external clock (2.56–307.2kHz).
It operates from 2.7V to 5.5V, draws only 200µA in conversion mode and 20µA in sleep mode, and accepts reference voltages from 0.1V to VCC. 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 dynamic range utilization without code gaps. |
| INL | 4ppm of VREF at 5V reference - enables ≤1 LSB error across full scale for 24-bit accuracy in precision instrumentation. |
| Offset Error | 0.5ppm of VREF - contributes <0.02µV offset drift per µV of reference, critical for zero-stability in weigh scales. |
| Output Noise | 0.3ppm RMS (1.5µVRMS at VREF = 5V) - sets effective resolution limit and supports sub-µV signal detection. |
| Notch Rejection | ≥110dB at 50Hz or 60Hz ±2% - eliminates mains interference without external filtering in industrial environments. |
| Supply Current | 200µA active / 20µA sleep - allows battery-powered operation for >1 year in low-duty-cycle sensor nodes. |
| Conversion Time | 133ms (60Hz mode) or 160ms (50Hz mode) - fixed single-cycle settling enables deterministic timing in multiplexed systems. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 150 mil width, JEDEC MS-012AC, RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply voltage input | 2.7V–5.5V operation; requires local 10µF tantalum + 0.1µF ceramic bypass to GND for stable conversion performance. |
| VREF (Pin 2) | Reference voltage input | Accepts 0.1V to VCC; defines full-scale range and noise floor; determines input range scaling (–0.125·VREF to +1.125·VREF). |
| VIN (Pin 3) | Analog input | Supports extended range beyond rail-to-rail; tolerates –0.3V to VCC+0.3V absolute max; series resistor ≤5kΩ allowed for fault protection. |
| GND (Pin 4) | Ground reference | Single-point analog/digital/reference ground; must connect directly to ground plane with minimal trace length. |
| CS (Pin 5) | Active-low chip select | Wakes device from sleep; enables SDO output; falling edge initiates data transfer; rising edge aborts transfer and starts new conversion. |
| SDO (Pin 6) | 3-state serial data output | Outputs 32-bit frame (4 status + 24 data + 4 sub-LSBs); EOC bit (Bit 31) available real-time during conversion/sleep for interrupt use. |
| SCK (Pin 7) | Bidirectional serial clock | Auto-configures as output (internal clock mode) or input (external clock mode) based on power-up state and CS timing. |
| FO (Pin 8) | Frequency control input | Selects 50Hz (FO=VCC), 60Hz (FO=GND), or external notch frequency (FO=external clock at 2.56–307.2kHz). |
Key Features
| Feature | Design Value |
|---|---|
| No-latency ∆Σ architecture | One-to-one correspondence between conversion and output data - eliminates filter settling delay for true multiplexed sensor sampling. |
| Live-zero extended input range | –12.5% to +112.5% of VREF accommodates pre-amplifier offsets and overrange transients without clipping or recalibration. |
| Auto-calibration per conversion | Continuous offset and full-scale correction ensures long-term stability against temperature, supply, and aging drift - no user intervention required. |
| Integrated oscillator with no external components | Eliminates crystal, capacitor, or resistor timing network - reduces BOM count, PCB area, and layout sensitivity in space-constrained designs. |
| Flexible 3-wire SPI/MICROWIRE interface | Hardware-configurable internal/external clock mode and free-running operation - no register programming or firmware overhead needed. |
Applications
| Weight Scales | Strain-Gage Transducers |
|---|---|
|
Use Scenario: High-precision platform scales measuring loads from 1g to 100kg with 0.1g resolution under 50/60Hz ambient noise. IC Role / Device Role / Timing Role: Primary ADC capturing mV-level bridge outputs; provides deterministic 133ms/160ms conversion intervals synchronized to line frequency. Use Value: 4ppm INL and 0.3ppm noise enable true 24-bit repeatability; extended input range absorbs amplifier offset drift without recalibration. |
Use Scenario: Industrial load cells in hydraulic press monitoring, where bridge excitation varies and thermal drift exceeds ±10mV. IC Role / Device Role / Timing Role: Direct digitization of ratiometric bridge signals; uses VREF derived from excitation source to reject common-mode errors. Use Value: Live-zero range (–0.125·VREF) captures negative offsets from cold-junction drift; 110dB notch rejects motor drive harmonics. |
| Gas Analyzers | Industrial Process Control |
|
Use Scenario: Electrochemical gas sensors with ultra-low output (10–100nA) amplified to 10–100mV, requiring sub-µV resolution in factory environments. IC Role / Device Role / Timing Role: High-accuracy DC measurement front-end; internal oscillator eliminates clock coupling into sensitive analog paths. Use Value: 0.3ppm RMS noise enables detection of <1ppm gas concentration changes; auto-calibration maintains accuracy across 0–50°C operating range. |
Use Scenario: PLC analog input modules acquiring temperature, pressure, and flow signals in noisy plant-floor settings with 50Hz/60Hz EMI. IC Role / Device Role / Timing Role: Isolated channel ADC per sensor; FO pin hardwired to GND/VCC for fixed 60Hz/50Hz rejection matching regional mains frequency. Use Value: ≥110dB normal-mode rejection prevents false trips from variable-frequency drives; SO-8 package supports high-density I/O card layouts. |
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 |
|---|---|---|---|
| ADS124S08IPWR | 24-bit, 4kSPS, integrated PGA and burn-out current sources; requires external reference; no built-in 50/60Hz notch. | Better suited for multi-channel sensor arrays with programmable gain; lacks autonomous line-frequency rejection. | Choose ADS124S08IPWR when PGA flexibility and channel count outweigh need for embedded notch filtering. |
| MAX11200EEE+ | 24-bit, 10SPS, 114dB 50/60Hz rejection, but no extended input range; higher 0.5µVRMS noise. | Valid for precision DVMs where input stays within 0–VREF; unsuitable for offset-prone transducer interfaces. | Choose MAX11200EEE+ only if system guarantees strict 0–VREF input compliance and requires marginally better rejection. |
Compared with ADS124S08IPWR and MAX11200EEE+, the LTC2400IS8#TRPBF uniquely combines live-zero input range, autonomous 50/60Hz notch, and zero-external-component oscillator - making it optimal for cost-sensitive, space-constrained, and thermally drifting transducer systems where design simplicity and robustness are prioritized over programmability or speed.
Availability
LTC2400IS8#TRPBF is available at Aetrix Electronics and suitable for weight scales, strain-gage transducers, and industrial process control systems requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC2400IS8#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2400IS8#TRPBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy DC measurement applications where noise, drift, and line-frequency interference must be eliminated without complex external circuitry.
FAQ
What is the operating temperature range for the LTC2400IS8#TRPBF?
The LTC2400IS8#TRPBF is rated for –40°C to +85°C (Industrial grade). This range is confirmed in the Absolute Maximum Ratings table and applies to all electrical specifications marked with "G" in the datasheet, including INL, offset error, and 110dB notch rejection. The part is not rated for extended temperature or military-grade operation.
Does the LTC2400IS8#TRPBF require external components for its oscillator function?
No, the LTC2400IS8#TRPBF integrates a precision internal oscillator and requires no external crystals, capacitors, or resistors for timing. When FO is tied to GND or VCC, the device autonomously generates its conversion clock and configures the digital filter for 60Hz or 50Hz rejection - a key differentiator from most competing 24-bit ADCs.
How does the extended input range of the LTC2400IS8#TRPBF work in practice?
The LTC2400IS8#TRPBF accepts inputs from –0.125·VREF to +1.125·VREF. For example, with VREF = 2.5V, VIN can range from –0.3125V to +2.8125V - allowing direct connection to op-amp stages with DC offsets up to ±312mV without clamping or external level-shifting circuitry.
Can the LTC2400IS8#TRPBF interface directly with a microcontroller using standard SPI?
Yes, the LTC2400IS8#TRPBF uses a 3-wire interface compatible with SPI and MICROWIRE protocols. It requires only CS, SDO, and SCK pins - no MOSI/MISO bidirectional complexity. Data is clocked out MSB-first on SDO with EOC (Bit 31) usable as an interrupt, and no configuration registers need initialization.
What is the significance of the 32-bit output format of the LTC2400IS8#TRPBF?
The LTC2400IS8#TRPBF outputs a 32-bit frame: Bits 31–28 convey real-time status (EOC, sign, extended range), Bits 27–4 contain the validated 24-bit result, and Bits 3–0 provide sub-LSBs for optional averaging. This structure enables immediate interrupt-driven readout and flexible post-processing without sacrificing resolution or determinism.
LTC2400IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 8-SOIC (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:
- 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2400IS8#TRPBF FAQ
1.How can I place an order for LTC2400IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2400IS8#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 LTC2400IS8#TRPBF reliable?
The price and inventory of LTC2400IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2400IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2400IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2400IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2400IS8#TRPBF?
LTC2400IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2400IS8#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 LTC2400IS8#TRPBF?
For technical support, including LTC2400IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2400IS8#TRPBF requirements.
6.How does Aetrix verify that LTC2400IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2400IS8#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 LTC2400IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2400IS8#TRPBF?
All LTC2400IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2400IS8#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 LTC2400IS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC2400IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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