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Analog Devices Inc. LTC2433-1CMS#PBF
- Part No.:
- LTC2433-1CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2433-1CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,956
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Product details
Overview
LTC2433-1CMS#PBF from Analog Devices (formerly Linear Technology) is a micropower 16-bit differential ΔΣ analog-to-digital converter with integrated oscillator, 0.12LSB INL, 1.45µV RMS noise independent of VREF, and simultaneous 50Hz/60Hz notch rejection - used in precision weight scales, strain-gage transducers, and direct temperature measurement systems.
For engineers reviewing the LTC2433-1CMS#PBF datasheet, LTC2433-1CMS#PBF pinout, LTC2433-1CMS#PBF application, or LTC2433-1CMS#PBF equivalent, key selection criteria include its rail-to-rail differential input/reference capability, 200µA active supply current, 4µA autosleep mode, internal oscillator eliminating external timing components, and compatibility with SPI/MICROWIRE interfaces.
Technical Context
The LTC2433-1CMS#PBF employs a no-latency delta-sigma architecture with decimating FIR filtering and on-chip autocalibration that performs offset and full-scale correction every conversion cycle. Its digital filter achieves ≥87dB normal-mode rejection from 49Hz to 61.2Hz when FO is grounded, or configurable notch at fEOSC/2560 ±4% with external clock.
It operates in three deterministic states - conversion, sleep, and data output - controlled solely by CS and SCK timing, with no configuration registers required. The 19-bit serial output includes real-time EOC (Bit 18), sign (Bit 16), MSB (Bit 15), and over/underrange flags encoded in Bits 16–15, all synchronized to falling-edge SCK transitions.
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 high linearity for precision sensor digitization without post-calibration correction. |
| Noise | 1.45µV RMS independent of VREF - enables consistent effective resolution even at low reference voltages (e.g., 100mV). |
| Supply Current | 200µA active / 4µA autosleep - supports battery-powered instrumentation with multi-year operation. |
| Differential Input Range | ±0.5 × VREF - supports bipolar signal acquisition with ratiometric scaling relative to user-supplied reference. |
| Reference Range | 0.1V to VCC - allows flexible remote sensing and low-voltage operation down to 100mV reference. |
| Common Mode Rejection | >140dB DC - rejects ground shifts and supply coupling in noisy industrial environments. |
| Notch Rejection | ≥87dB at 50Hz/60Hz simultaneously - eliminates mains interference without external filters or software averaging. |
Pinout & Package
Package: 10-lead MSOP (3mm × 3mm), moisture sensitivity level 1, RoHS-compliant, rated for 0°C to 70°C (C-grade).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Positive supply input | Accepts 2.7V–5.5V; requires local 10µF + 0.1µF bypassing for stable ADC performance. |
| REF+ (Pin 2) | Differential reference positive | Must be ≥0.1V above REF–; common-mode voltage adjustable from GND to VCC. |
| REF– (Pin 3) | Differential reference negative | Defines reference return; may be set independently of GND for floating sensor bridges. |
| IN+ (Pin 4) | Differential analog input positive | Supports absolute voltage from GND–0.3V to VCC+0.3V; enables wide common-mode input range. |
| IN– (Pin 5) | Differential analog input negative | Paired with IN+; full-scale range = ±0.5 × (REF+ – REF–); rejects >140dB DC common-mode error. |
| GND (Pin 6) | Analog/digital ground | Low-impedance connection to ground plane required to minimize noise coupling into ADC core. |
| CS (Pin 7) | Active-low chip select | Wakes device from sleep (CS=LOW), enables SDO, and controls state transition timing - no pull-up needed. |
| SDO (Pin 8) | 3-state serial data output | Outputs 19-bit frame (EOC/DMY/SIG/MSB/data); high-Z when CS=HIGH; compatible with SPI master inputs. |
| SCK (Pin 9) | Bidirectional serial clock | Auto-configures as input (external SCK mode) or output (internal SCK mode) based on power-up or CS edge logic level. |
| FO (Pin 10) | Frequency control input | GND selects internal oscillator (50/60Hz rejection); external clock (2.56–2000kHz) sets custom notch frequency fEOSC/2560. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency ΔΣ conversion | Single-cycle settling with 1:1 correspondence between conversion and output - eliminates filter delay in closed-loop systems. |
| Integrated oscillator | Eliminates crystals, capacitors, or external clocks - reduces BOM count and layout area while guaranteeing 50/60Hz rejection. |
| Rail-to-rail differential I/O | Independent setting of VINCM and VREFCM from GND to VCC enables direct interface to bridge sensors without level-shifting circuitry. |
| Autocalibration per conversion | Continuous offset and full-scale correction ensures stability over time, temperature (–40°C to 85°C), and supply variation without user intervention. |
| Flexible 3-wire interface | Hardware-mode detection of SCK logic level at power-up or CS edge enables SPI/MICROWIRE compatibility without register writes. |
| Low-voltage reference support | Operates with 100mV reference while maintaining 16-bit resolution - improves SNR for microvolt-level sensor outputs. |
Applications
| Weight Scales | Strain-Gage Transducers |
|---|---|
Use Scenario: High-precision load cell readout in commercial and industrial weighing platforms requiring <10ppm linearity and long-term zero stability. IC Role / Device Role / Timing Role: Direct sensor digitizer converting mV-level bridge output to calibrated digital values with no external amplification or filtering. Use Value: 0.12LSB INL and 1.45µV RMS noise enable sub-gram resolution on 10kg platforms; autosleep extends battery life beyond 5 years. | Use Scenario: Structural health monitoring in civil engineering applications using bonded foil or MEMS strain gages under varying thermal conditions. IC Role / Device Role / Timing Role: Ratiometric ADC acquiring differential bridge signals while rejecting common-mode drift from temperature gradients. Use Value: >140dB DC common-mode rejection and per-conversion autocalibration maintain accuracy across –40°C to +85°C without recalibration. |
| Direct Temperature Measurement | Gas Analyzers |
Use Scenario: RTD or thermistor-based temperature sensing in HVAC controllers and medical diagnostic equipment requiring NIST-traceable accuracy. IC Role / Device Role / Timing Role: Precision ratiometric ADC referenced to stable excitation current source, digitizing resistance changes with minimal self-heating. Use Value: 0.16LSB full-scale error and 5µV offset ensure ±0.05°C accuracy over 0–100°C range; 100mV reference support enables low-power excitation. | Use Scenario: Electrochemical gas sensor readout in portable air quality monitors detecting CO, NO₂, or O₃ at ppm levels in ambient air. IC Role / Device Role / Timing Role: Low-noise front-end digitizer capturing weak current outputs from amperometric sensors with high common-mode rejection. Use Value: 1.45µV RMS noise and simultaneous 50/60Hz notch allow single-shot acquisition without software averaging - critical for fast-response portable instruments. |
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 |
|---|---|---|---|
| ADS1115IDGSR | 16-bit, I²C interface, 860SPS max, no integrated oscillator, 150nV/√Hz noise density | Requires external clocking and digital filtering for 50/60Hz rejection; better suited for multi-channel, lower-speed monitoring | Select when system already uses I²C bus and needs four input channels; avoid when mains rejection must be hardware-guaranteed. |
| LTC2413CGN#PBF | 24-bit, same pinout, 200µA supply, 0.05LSB INL, 0.7µV RMS noise, identical FO/SCK/CS behavior | Higher resolution and lower noise, but larger LSB step size limits dynamic range at low VREF | Select when ultimate precision is required and reference voltage ≥2.5V; LTC2433-1CMS#PBF preferred for 100mV–1V references. |
Compared with ADS1115IDGSR and LTC2413CGN#PBF, the LTC2433-1CMS#PBF uniquely delivers guaranteed 50/60Hz rejection via integrated oscillator in a 10-pin MSOP, making it optimal for cost-sensitive, single-channel, mains-immune sensor nodes where SPI compatibility and ultra-low sleep current are critical.
Availability
LTC2433-1CMS#PBF is available at Aetrix Electronics and suitable for weight scales, strain-gage transducers, direct temperature measurement systems, and gas analyzers requiring stable component supply with guaranteed long-term availability.
Supply support for LTC2433-1CMS#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.
The LTC2433-1CMS#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in harsh electrical environments where mains interference and long-term drift must be eliminated at the hardware level.
FAQ
What is the operating temperature range for the LTC2433-1CMS#PBF?
The LTC2433-1CMS#PBF is specified for the commercial temperature range of 0°C to 70°C. Its internal autocalibration maintains performance across this range without external compensation. For extended operation, the industrial-grade variant LTC2433-1IMS#PBF supports –40°C to 85°C, but the LTC2433-1CMS#PBF itself is not rated beyond 70°C.
Does the LTC2433-1CMS#PBF require external passive components for its internal oscillator?
No, the LTC2433-1CMS#PBF requires no external passive components for its internal oscillator. When FO is tied to GND, the on-chip oscillator automatically enables and provides precise timing for the delta-sigma modulator and digital filter - eliminating crystals, capacitors, or RC networks and reducing board space and BOM cost.
How does the LTC2433-1CMS#PBF achieve simultaneous 50Hz and 60Hz rejection?
The LTC2433-1CMS#PBF achieves simultaneous 50Hz and 60Hz rejection through its fixed-frequency internal oscillator and matched decimating FIR filter architecture. When FO = GND, the internal clock drives a digital filter with dual-notch response centered at both frequencies, delivering ≥87dB attenuation from 49Hz to 61.2Hz - a hardware-guaranteed feature independent of software or external components.
Can the LTC2433-1CMS#PBF operate with a 100mV reference voltage while maintaining 16-bit resolution?
Yes, the LTC2433-1CMS#PBF supports reference voltages as low as 100mV and maintains true 16-bit resolution with no missing codes. Its 1.45µV RMS noise remains constant regardless of VREF, so at 100mV reference the LSB size is 1.5µV - yielding ~10-bit effective resolution, but the full 16-bit code word is valid and monotonic per specification.
Is the LTC2433-1CMS#PBF pin-compatible with other devices in the LTC24xx family?
Yes, the LTC2433-1CMS#PBF is pin-compatible with the LTC2431 and LTC2411 in the 10-lead MSOP package. This allows drop-in replacement in existing designs targeting different resolution or speed requirements, provided the application does not depend on features unique to those variants - such as the LTC2431's 24-bit resolution or the LTC2411's different notch configuration.
LTC2433-1CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- microPOWER™
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC2433-1CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2433-1CMS#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 LTC2433-1CMS#PBF reliable?
The price and inventory of LTC2433-1CMS#PBF 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#PBF is usually 5 days.
3.What payment methods are accepted for LTC2433-1CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2433-1CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2433-1CMS#PBF?
LTC2433-1CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2433-1CMS#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 LTC2433-1CMS#PBF?
For technical support, including LTC2433-1CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2433-1CMS#PBF requirements.
6.How does Aetrix verify that LTC2433-1CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2433-1CMS#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 LTC2433-1CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2433-1CMS#PBF?
All LTC2433-1CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2433-1CMS#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 LTC2433-1CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2433-1CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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