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Analog Devices Inc. LTC2402CMS#TRPBF
- Part No.:
- LTC2402CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2402CMS#TRPBF.pdf
- Description:
- IC ADC 24BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,919
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Product details
Overview
LTC2402CMS#TRPBF from Analog Devices (formerly Linear Technology) is a 2-channel, 24-bit micropower delta-sigma ADC in MSOP-10 package, featuring no-latency digital filtering, 4ppm INL, 0.6ppm RMS noise, and integrated oscillator. It operates from 2.7V to 5.5V, supports pseudo-differential bridge digitization, and is used in high-precision weight scales and strain gauge transducers.
For engineers reviewing the LTC2402CMS#TRPBF datasheet, LTC2402CMS#TRPBF pinout, LTC2402CMS#TRPBF application, or LTC2402CMS#TRPBF equivalent, key selection criteria include 50/60Hz notch rejection via FO pin, extended input range (–12.5% to +112.5% VREF), automatic channel ping-pong switching, zero/full-scale set inputs, and SPI/MICROWIRE-compatible 3-wire interface.
Technical Context
The LTC2402CMS#TRPBF implements a proprietary decimating FIR filter with single-cycle settling, eliminating latency typical of conventional ∆Σ converters. Its internal oscillator enables 110dB min rejection at 50Hz or 60Hz ±2% without external components, while the FO pin selects notch frequency or accepts external clock (1Hz–120Hz).
It uses continuous auto-calibration per conversion cycle for offset and full-scale stability across temperature and supply voltage. Input range extends from ZSSET – 0.12·VREF to FSSET + 0.12·VREF (VREF = FSSET – ZSSET), supporting live-zero operation and sensor overrange compensation in instrumentation front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 24-bit with no missing codes - guarantees monotonicity and full dynamic range utilization |
| INL | 4ppm of VREF - enables sub-1µV linearity error with 2.5V reference |
| RMS Noise | 0.6ppm of VREF - ~1.5µVRMS at 2.5V reference, suitable for µV-level signal acquisition |
| Supply Current | 200µA in conversion mode - ultra-low power for battery-operated precision sensors |
| Notch Rejection | ≥110dB at 50Hz or 60Hz ±2% - eliminates mains interference without external filters |
| Input Range | –12.5% to +112.5% VREF - accommodates sensor offset, gain drift, and overrange without clipping |
| Conversion Time | 130.9–136.2ms (FO = GND) - deterministic timing for synchronized multi-channel sampling |
Pinout & Package
Package: 10-lead plastic MSOP (MS10), 3mm × 3mm, 0.5mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | 2.7V–5.5V analog/digital supply; requires local 10µF + 0.1µF bypassing |
| FSSET (Pin 2) | Full-scale reference input | Sets upper end of conversion range; defines VREF when paired with ZSSET |
| CH1 (Pin 3) | Channel 1 analog input | Pseudo-differential input; alternates with CH0 in automatic ping-pong mode |
| CH0 (Pin 4) | Channel 0 analog input | Pseudo-differential input; primary channel for single-ended use or first in sequence |
| ZSSET (Pin 5) | Zero-scale reference input | Sets lower end of conversion range; VREF = FSSET – ZSSET |
| GND (Pin 6) | Common ground | Single-point analog/digital/reference ground connection; critical for noise immunity |
| CS (Pin 7) | Chip select input | Active-low enable; controls sleep/wake and SDO output state |
| SDO (Pin 8) | Serial data output | 3-state output delivering 32-bit frame (status + 24-bit result + 4 sub-LSBs) |
| SCK (Pin 9) | Serial clock I/O | Bidirectional: output in internal-clock mode, input in external-clock mode |
| FO (Pin 10) | Frequency control input | Selects 50Hz (FO = VCC), 60Hz (FO = GND), or external oscillator (FO = fEOSC) |
Key Features
| Feature | Design Value |
|---|---|
| No-latency ∆Σ architecture | Single-cycle filter settling enables true multiplexed 2-channel operation without data delay or pipeline artifacts |
| Automatic channel ping-pong | LTC2402-specific feature: hardware-controlled alternating conversions on CH0/CH1 without host intervention |
| Live-zero extended input range | –12.5% to +112.5% VREF allows seamless integration with uncalibrated sensors and op-amp front-ends exhibiting offset/gain drift |
| Per-conversion auto-calibration | Continuous offset and full-scale correction ensures <0.01ppm/°C drift and <0.04ppm/V supply rejection over lifetime |
| Configurable 50/60Hz rejection | FO pin selection provides factory-trimmed notch without software configuration or external components |
Applications
| Weight Scales | Direct Temperature Measurement |
|---|---|
Use Scenario: High-resolution load cell readout in commercial and industrial weighing systems requiring legal-for-trade accuracy. IC Role / Device Role / Timing Role: Pseudo-differential bridge digitizer with live-zero input range compensating for thermal EMF and cable resistance drift. Use Value: 24-bit resolution and 4ppm INL enable ≤10mg resolution on 30kg platform scale using standard 2mV/V load cells. | Use Scenario: Precision RTD or thermistor measurement in environmental monitoring and HVAC control units. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC interfacing directly to 3-wire or 4-wire RTD bridges with programmable excitation current sources. Use Value: 0.6ppm RMS noise and auto-calibration maintain ±0.01°C repeatability over –40°C to +85°C without recalibration. |
| Strain Gauge Transducers | Industrial Process Control |
Use Scenario: Structural health monitoring in civil engineering applications using bonded foil or MEMS strain gauges. IC Role / Device Role / Timing Role: Dual-channel synchronous digitization of Wheatstone bridge outputs with common-mode rejection enhancement. Use Value: Ping-pong channel switching and 110dB 50/60Hz rejection suppress vibration-induced noise and EMI in factory environments. | Use Scenario: Analog input module for PLCs and distributed I/O systems measuring pressure, flow, and level signals. IC Role / Device Role / Timing Role: Isolated analog front-end digitizer with extended input range accommodating field transmitter zero/scale drift. Use Value: –12.5% to +112.5% VREF range eliminates need for manual zero-adjust potentiometers and supports HART-compatible diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 24-bit delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit, 4kSPS, integrated PGA and burn-out current sources; SPI-only interface; no built-in 50/60Hz notch | Requires external digital notch filtering or system-level synchronization for mains rejection | Preferred when programmable gain and sensor excitation are needed, but adds complexity for pure bridge digitization |
| MAX11206ETL+ | 24-bit, 10SPS, internal oscillator, 105dB 50/60Hz rejection; TQFN-16 package; no dual-channel ping-pong | Single-channel only; requires external multiplexer for 2-sensor systems | Selected for space-constrained single-input designs where 5dB lower rejection is acceptable |
Compared with ADS124S08IPW and MAX11206ETL+, the LTC2402CMS#TRPBF uniquely delivers hardware-managed dual-channel sampling, factory-trimmed 110dB notch, and live-zero input range in a 10-pin MSOP-reducing BOM count and firmware overhead in bridge-based instrumentation.
Availability
LTC2402CMS#TRPBF is available at Aetrix Electronics and suitable for weight scales, direct temperature measurement, and strain gauge transducers requiring stable component supply, long-term calibration integrity, and industrial temperature range support (–40°C to +85°C).
Supply support for LTC2402CMS#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 LTC2402CMS#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for ultra-stable, low-power, high-resolution sensor digitization in harsh industrial environments.
FAQ
What is the function of the FO pin on the LTC2402CMS#TRPBF?
The FO (Frequency Oscillator) pin on the LTC2402CMS#TRPBF selects the digital filter's notch frequency: tied to VCC for 50Hz ±2% rejection, to GND for 60Hz ±2% rejection, or driven by an external clock (1Hz–120Hz) to set custom rejection at fEOSC/2560. This eliminates external crystal components and enables field-configurable mains interference suppression without firmware changes. The LTC2402CMS#TRPBF achieves ≥110dB rejection in all modes.
How does the LTC2402CMS#TRPBF handle dual-channel operation?
The LTC2402CMS#TRPBF implements automatic hardware ping-pong channel selection between CH0 and CH1-no register writes or timing control required. After each conversion completes, the device internally switches to the alternate channel before the next conversion cycle begins. This ensures deterministic, jitter-free interleaving ideal for synchronous differential measurements. The LTC2402CMS#TRPBF outputs channel identity in Bit 30 of its 32-bit data frame.
What is the meaning of "live zero" in the LTC2402CMS#TRPBF input range specification?
"Live zero" refers to the LTC2402CMS#TRPBF's extended input range of –12.5% to +112.5% of VREF (where VREF = FSSET – ZSSET), enabling valid conversion even when input voltage falls below ZSSET or exceeds FSSET. This accommodates sensor zero-point drift, amplifier offset errors, and overrange conditions without saturation. The LTC2402CMS#TRPBF clamps output at corresponding codes but maintains monotonicity across the full range.
Does the LTC2402CMS#TRPBF require external calibration components?
No-the LTC2402CMS#TRPBF performs full offset and full-scale auto-calibration every conversion cycle using on-chip DACs and internal references. This eliminates the need for external trim pots, calibration EEPROM, or factory calibration routines. The LTC2402CMS#TRPBF maintains 0.5ppm offset error and 4ppm full-scale error over temperature and supply voltage without user intervention.
What interface protocols does the LTC2402CMS#TRPBF support?
The LTC2402CMS#TRPBF supports SPI and MICROWIRE-compatible 3-wire serial interfaces (CS, SDO, SCK), with SCK operating bidirectionally: as output in internal-clock mode or input in external-clock mode. It requires no configuration registers-timing and mode are determined by pin states at power-up and CS/SCK transitions. The LTC2402CMS#TRPBF delivers a 32-bit frame containing status bits, 24-bit result, and 4 sub-LSBs.
LTC2402CMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 24
- Sampling Rate (Per Second):
- 7.5
- Number of Inputs:
- 2
- 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:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2402CMS#TRPBF FAQ
1.How can I place an order for LTC2402CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2402CMS#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 LTC2402CMS#TRPBF reliable?
The price and inventory of LTC2402CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2402CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2402CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2402CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2402CMS#TRPBF?
LTC2402CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2402CMS#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 LTC2402CMS#TRPBF?
For technical support, including LTC2402CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2402CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2402CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2402CMS#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 LTC2402CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2402CMS#TRPBF?
All LTC2402CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2402CMS#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 LTC2402CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2402CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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