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Analog Devices Inc. LTC2433-1CMS#TRPBF
- Part No.:
- LTC2433-1CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2433-1CMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,488
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Product details
Overview
LTC2433-1CMS#TRPBF from Analog Devices (formerly Linear Technology) is a micropower 16-bit differential ΔΣ analog-to-digital converter with integrated oscillator, rail-to-rail differential input/reference, and no-latency digital filter output. It delivers 0.12LSB INL, 1.45µV RMS noise independent of VREF, and >87dB simultaneous 50Hz/60Hz rejection - enabling high-accuracy direct sensor digitization in weight scales and industrial process control.
For engineers reviewing the LTC2433-1CMS#TRPBF datasheet, LTC2433-1CMS#TRPBF pinout, LTC2433-1CMS#TRPBF application, or LTC2433-1CMS#TRPBF equivalent, key selection criteria include its 200µA active supply current, 10-lead MSOP package, internal oscillator eliminating external timing components, flexible 3-wire SPI/MICROWIRE interface, and support for reference voltages as low as 100mV at full 16-bit resolution.
Technical Context
The LTC2433-1CMS#TRPBF employs a delta-sigma modulator with decimating FIR filter and on-chip autocalibration that performs offset and full-scale correction every conversion cycle. Its digital filter achieves single-conversion settling without latency, delivering immediate valid data after each measurement.
It supports dual clocking modes: internal oscillator (FO = GND) for fixed 49–61.2Hz notch rejection, or external oscillator (FO driven) for user-defined rejection at fEOSC/2560 ±4% with >110dB attenuation. The 3-wire interface operates in either internal SCK (SCK output) or external SCK (SCK input) mode, auto-selected at power-up or CS falling edge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and unambiguous code mapping across full input range. |
| INL | 0.12LSB max - ensures linearity error ≤ ±1.8µV at 5V reference, critical for precision weighing and strain-gage applications. |
| RMS Noise | 1.45µV RMS, independent of VREF - enables consistent low-noise performance even when scaling reference down to 100mV. |
| Supply Current | 200µA active / 4µA autosleep - supports battery-powered instrumentation with ultra-low quiescent power. |
| Input Range | ±0.5 × VREF differential, with VINCM and VREFCM independently adjustable from GND to VCC - allows true ratiometric and remote sensing configurations. |
| Common Mode Rejection | DC rejection >140dB - suppresses ground-shift errors in noisy industrial environments. |
| Notch Rejection | 87dB min simultaneous 50Hz/60Hz rejection - eliminates mains interference without external filtering or software averaging. |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm), moisture sensitivity level 1, RoHS-compliant, rated for –40°C to 85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7V–5.5V; requires local 10µF + 0.1µF bypass for stable ADC operation. |
| REF+ / REF– (Pins 2, 3) | Differential reference inputs | Support 0.1V–VCC differential range; common-mode voltage independently set from GND to VCC. |
| IN+ / IN– (Pins 4, 5) | Differential analog inputs | Bipolar input range = ±0.5 × VREF; absolute voltage range extends to GND–0.3V and VCC+0.3V. |
| GND (Pin 6) | Analog/digital ground | Low-impedance connection required; shared reference for all analog and digital circuitry. |
| CS (Pin 7) | Active-low chip select | Wakes device from sleep (4µA) into data output mode; aborts transfer if raised mid-read. |
| SDO (Pin 8) | Three-state serial data output | Outputs 19-bit frame (3 status + 16 data bits); high-Z when CS = HIGH. |
| SCK (Pin 9) | Bidirectional serial clock | Auto-configures as input (external clock mode) or output (internal clock mode) based on power-up state. |
| FO (Pin 10) | Frequency control input | GND selects internal oscillator (50/60Hz rejection); external clock signal enables custom notch frequency. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency ΔΣ architecture | Delivers valid 16-bit result immediately after conversion completes - no filter settling delay or redundant samples. |
| Autocalibration per conversion | Eliminates drift-induced offset/full-scale errors over time, temperature, and supply variation - no system-level recalibration needed. |
| Flexible reference support | Operates with VREF as low as 100mV while maintaining 16-bit resolution - improves effective resolution for low-level sensor outputs. |
| Simultaneous 50Hz/60Hz rejection | Hardware-based notch filtering removes mains interference in global deployments without firmware overhead or external components. |
| PIN-compatible upgrade path | Pinout matches LTC2431/LTC2411 - enables drop-in migration from 20-/24-bit variants where 16-bit resolution suffices. |
Applications
| Weight Scales | Industrial Process Control |
|---|---|
Use Scenario: High-precision load cell readout in platform scales and hopper systems operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Direct sensor digitizer converting mV-level bridge output to calibrated digital values with <1ppm linearity error. Use Value: Eliminates need for external instrumentation amplifier and anti-alias filter; 87dB mains rejection ensures stable readings without software averaging. | Use Scenario: Monitoring pressure, flow, or level transmitters in chemical plants where long cable runs introduce common-mode noise and ground shifts. IC Role / Device Role / Timing Role: Ratiometric ADC interfacing with 4–20mA loop-powered sensors using isolated reference and wide common-mode input range. Use Value: 140dB DC common-mode rejection and independent VINCM/VREFCM setting enable accurate measurements despite ground potential differences up to 5V. |
| Direct Temperature Measurement | Gas Analyzers |
Use Scenario: Cold-junction compensation and thermocouple readout in HVAC controllers requiring sub-0.1°C accuracy over –20°C to 60°C. IC Role / Device Role / Timing Role: Low-drift, low-noise ADC digitizing µV-level thermocouple outputs with integrated cold-junction sensor reference. Use Value: 1.45µV RMS noise and 5µV offset error allow resolution of <0.5°C increments with Type-K thermocouples at room temperature. | Use Scenario: Electrochemical gas sensor signal conditioning in portable air quality monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Micropower ADC capturing low-amplitude current signals from gas-sensitive electrodes with minimal self-heating. Use Value: 4µA autosleep current extends battery life beyond 5 years; internal oscillator removes timing component count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit differential ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPWR | 24-bit resolution, integrated PGA and temperature sensor; higher supply current (310µA active), SPI-only interface. | Requires external reference; better suited for multi-channel sensor arrays needing programmable gain. | Select ADS124S08IPWR when higher resolution and on-chip PGA are needed; LTC2433-1CMS#TRPBF remains optimal for cost-sensitive, single-channel, ultra-low-power designs. |
| MAX11206ETL+ | 18-bit resolution, 150µA active current, internal reference only (no external VREF support), 12-pin TDFN package. | Lacks differential reference input and simultaneous 50/60Hz rejection - requires external notch filtering for AC-line immunity. | Choose MAX11206ETL+ for compact size and internal reference convenience; LTC2433-1CMS#TRPBF is preferred when external reference flexibility and hardware-based mains rejection are mandatory. |
Compared with ADS124S08IPWR and MAX11206ETL+, the LTC2433-1CMS#TRPBF uniquely combines micropower operation (4µA sleep), external differential reference support, and built-in 50/60Hz rejection - making it the only option among the three that eliminates both external timing components and analog front-end filtering in battery-powered industrial sensors.
Availability
LTC2433-1CMS#TRPBF is available at Aetrix Electronics and suitable for weight scales, industrial process control, and portable gas analyzers requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for LTC2433-1CMS#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and control.
The LTC2433-1CMS#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for direct sensor digitization in low-power, high-accuracy industrial and instrumentation applications where simplicity, stability, and noise immunity are critical.
FAQ
What is the minimum reference voltage supported by the LTC2433-1CMS#TRPBF while maintaining 16-bit resolution?
The LTC2433-1CMS#TRPBF supports differential reference voltages as low as 100mV (0.1V) while preserving full 16-bit resolution and no missing codes. At this reference level, the LSB step size is 1.5µV, and the 1.45µV RMS noise remains constant - yielding improved effective resolution for low-level sensor signals. This capability is confirmed in the Electrical Characteristics table (VREF min = 0.1V) and Application Information section.
Does the LTC2433-1CMS#TRPBF require external components for its oscillator function?
No, the LTC2433-1CMS#TRPBF integrates a precision internal oscillator that requires no external components. When FO is tied to GND, the device automatically uses this oscillator to achieve simultaneous 50Hz/60Hz rejection. The oscillator is explicitly characterized in the Timing Characteristics table (tCONV = 143.8–149.6ms) and described in the Functional Diagram and Applications Information sections.
How does the LTC2433-1CMS#TRPBF handle input overrange and underrange conditions?
The LTC2433-1CMS#TRPBF outputs distinct 19-bit status codes for overrange (VIN > +0.5 × VREF) and underrange (VIN < –0.5 × VREF) conditions. Bits 18–15 encode these states: both Bit 16 (SIG) and Bit 15 (MSB) HIGH indicates overrange; both LOW indicates underrange. This behavior is fully documented in Table 1 and Figure 3 of the datasheet, and applies regardless of reference voltage or supply conditions.
What is the purpose of the FO pin on the LTC2433-1CMS#TRPBF, and how does it affect operation?
The FO (Frequency Oscillator) pin on the LTC2433-1CMS#TRPBF selects the conversion clock source: grounding FO enables the internal oscillator for fixed 50/60Hz rejection, while driving FO with an external clock (2.56kHz–2MHz) configures custom notch frequency at fEOSC/2560 ±4%. This dual-mode operation is detailed in the Pin Functions section and Timing Characteristics table, with rejection performance verified in Figures 4 and 5.
Is the LTC2433-1CMS#TRPBF pin-compatible with other devices in the LTC24xx family?
Yes, the LTC2433-1CMS#TRPBF is explicitly stated as pin-compatible with the LTC2431 and LTC2411 in the Features section. All three share identical 10-lead MSOP pinouts, allowing mechanical and layout compatibility. However, functional differences exist: LTC2431/LTC2411 offer 20-/24-bit resolution and different noise/performance trade-offs, while LTC2433-1CMS#TRPBF provides optimized 16-bit performance with lower power and simplified timing.
LTC2433-1CMS#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:
- 16
- Sampling Rate (Per Second):
- 6.8
- Number of Inputs:
- 1
- Input Type:
- Differential
- 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:
- -
LTC2433-1CMS#TRPBF FAQ
1.How can I place an order for LTC2433-1CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2433-1CMS#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 LTC2433-1CMS#TRPBF reliable?
The price and inventory of LTC2433-1CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2433-1CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2433-1CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2433-1CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2433-1CMS#TRPBF?
LTC2433-1CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2433-1CMS#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 LTC2433-1CMS#TRPBF?
For technical support, including LTC2433-1CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2433-1CMS#TRPBF requirements.
6.How does Aetrix verify that LTC2433-1CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2433-1CMS#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 LTC2433-1CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2433-1CMS#TRPBF?
All LTC2433-1CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2433-1CMS#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 LTC2433-1CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC2433-1CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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