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Analog Devices Inc. LTC2473CMS#PBF
- Part No.:
- LTC2473CMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2473CMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:242
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Product details
Overview
LTC2473CMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit differential ΔΣ analog-to-digital converter with integrated 1.25V precision reference, I²C interface, and selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, delivers ±1 mV offset error and ±0.01% gain error, and targets high-accuracy sensor digitization in space-constrained industrial monitoring systems.
For engineers reviewing the LTC2473CMS#PBF datasheet, LTC2473CMS#PBF pinout, LTC2473CMS#PBF application, or LTC2473CMS#PBF equivalent, this page provides verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for system-level design and BOM optimization.
Technical Context
The LTC2473CMS#PBF implements a delta-sigma architecture with internal oscillator and proprietary input sampling that reduces average input current to 50nA-enabling direct RC filtering without significant error. Its differential input supports ±VREF (±1.25V) range, and it features single-cycle conversion settling with no latency, simplifying multiplexed sensor acquisition.
It supports two I²C slave addresses (0010100b or 1010100b) via A0 pin configuration, uses open-drain SDA with external pull-up, and includes programmable sleep mode (SLP bit) to reduce supply current to ≤2µA by powering down both ADC and reference after conversion completion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit-provides 65,536 discrete codes for high-fidelity sensor signal digitization. |
| Input Type | Differential (±VREF)-rejects common-mode noise and enables bipolar measurement of transducer outputs. |
| Reference Output | 1.25V ±3mV (1.247V–1.253V), 2ppm/°C max drift-eliminates need for external reference in precision measurement designs. |
| Conversion Rate | Selectable 208sps or 833sps-supports trade-off between noise performance (lower rate) and throughput (higher rate). |
| Supply Current | 3.5mA typ (conversion), 2µA max (sleep)-enables battery-powered or ultra-low-power monitoring nodes. |
| Offset Error | ±1mV-ensures <1 LSB error at full-scale when VREF = 1.25V (1 LSB = 38.1µV). |
| Gain Error | ±0.01% FS-limits full-scale scaling inaccuracy to ±6.5 LSB across temperature. |
Pinout & Package
Package: 12-lead MSOP (3mm × 4.9mm), exposed pad not present (unlike DFN variant). RoHS-compliant, Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V reference voltage source; requires 0.1µF capacitor to GND for stability and low noise. |
| COMP (2) | Reference compensation | Internal compensation node; must connect 0.1µF capacitor to GND matching REFOUT cap for optimal startup time and noise. |
| A0 (3) | I²C address select | Configures slave address: GND → 0010100b (0x24), VCC → 1010100b (0x54); enables dual-device bus sharing. |
| GND (4, 7, 11) | Ground return | Three dedicated ground pins minimize ground bounce and improve PSRR; all must be connected to low-impedance PCB ground plane. |
| SCL (5) | I²C clock input | Accepts standard/fast-mode I²C clock (≤400kHz); device acts only as slave-no clock generation capability. |
| SDA (6) | I²C bidirectional data | Open-drain output during data transfer; requires external 1.7kΩ pull-up to VCC; high-impedance otherwise. |
| REF– (8) | Reference negative input | Sets zero-input point; tied directly to system ground or remote sensor ground sense for accurate common-mode rejection. |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF; designed for direct connection to bridge sensor top or amplifier output. |
| IN– (10) | Differential negative input | Accepts voltage down to 0V; paired with IN+ for true differential measurement with inherent noise immunity. |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local decoupling: 10µF + 0.1µF ceramic in parallel, placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency output | Single-cycle conversion with immediate 16-bit result availability-no filter settling delay, enabling deterministic timing in multiplexed systems. |
| Ultra-low input current | 50nA average sampling current-permits use of simple RC anti-aliasing filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error. |
| Programmable power modes | Two-tier shutdown: NAP (ADC off, ref on) and SLEEP (ADC + ref off), reducing current from 3.5mA to ≤2µA for duty-cycled sensing. |
| Integrated reference stability | 2ppm/°C max drift over 0°C–70°C-meets precision requirements for Class I environmental monitors without calibration. |
| Relaxed anti-aliasing | Oversampling ratio of 8192 (208sps) or 2048 (833sps)-reduces external filter complexity and cost vs. Nyquist-rate converters. |
Applications
| Industrial Process Monitoring | Environmental Sensor Node |
|---|---|
|
Use Scenario: Continuous logging of pressure, load cell, or thermopile outputs in factory automation cabinets. IC Role / Device Role / Timing Role: Differential ADC digitizing millivolt-level bridge signals with 16-bit resolution and built-in reference stability. Use Value: Eliminates external reference and calibration, reduces BOM count by 2–3 components, and maintains ±0.02% accuracy over 0°C–70°C operating range. |
Use Scenario: Battery-powered air quality station measuring CO₂, humidity, and particulate sensors. IC Role / Device Role / Timing Role: Low-power ADC acquiring multiple analog inputs via external multiplexer with automatic nap/sleep control. Use Value: Enables 5-year battery life via 2µA sleep current and single-shot conversion triggered only on sensor event detection. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
|
Use Scenario: Precision RTD or thermistor readout in medical diagnostic equipment requiring traceable accuracy. IC Role / Device Role / Timing Role: High-accuracy differential front-end converting ratiometric sensor voltage with 1.25V reference. Use Value: Achieves <0.1°C temperature resolution using PT100 without external op-amps or reference ICs. |
Use Scenario: Retrofitting legacy 12-bit microcontroller-based systems with higher-resolution analog acquisition. IC Role / Device Role / Timing Role: I²C-compatible drop-in ADC replacement adding 4 extra bits of resolution and integrated reference. Use Value: Requires only firmware update (I²C register map) and no PCB layout change-preserves existing MCU and routing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar differential 16-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, 16-bit, PGA (up to 16×), but no integrated reference-requires external 2.048V reference; 860µA active current. | Better for multi-sensor systems needing programmable gain; less suitable for space-constrained single-sensor nodes where reference integration matters. | Choose ADS1115IDGSR when channel count >1 or variable gain is required; LTC2473CMS#PBF preferred for minimal footprint and guaranteed reference accuracy. |
| MAX11613AUT+T | 8-channel, 16-bit, SAR architecture; no integrated reference; 1.25V internal reference optional (separate part); 1.5mA active current. | Higher speed (100ksps), lower resolution stability over temperature (±10ppm/°C ref drift); requires external reference for precision. | Choose MAX11613AUT+T for high-throughput applications with moderate accuracy; LTC2473CMS#PBF for low-noise, low-power, reference-integrated precision. |
Compared with ADS1115IDGSR and MAX11613AUT+T, the LTC2473CMS#PBF uniquely integrates a 2ppm/°C reference and achieves 2µA sleep current-making it optimal for compact, battery-operated, single-sensor measurement systems where BOM reduction and long-term stability are critical.
Availability
LTC2473CMS#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, environmental sensor nodes, direct temperature measurement, and embedded ADC upgrades requiring stable component supply across extended production lifecycles.
Supply support for LTC2473CMS#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 (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2473CMS#PBF belongs to Linear's precision delta-sigma ADC family, engineered for low-power, high-accuracy sensor interfacing in space- and energy-constrained embedded systems-emphasizing ease of use, minimal external components, and guaranteed performance over temperature.
FAQ
What is the operating temperature range for the LTC2473CMS#PBF?
The LTC2473CMS#PBF is specified for 0°C to 70°C (C-grade). This range is confirmed in the "Order Information" table of the datasheet, where "CMS" denotes the MSOP package with commercial temperature grade. The device's reference drift is guaranteed at ±2ppm/°C over this interval, and all key specifications-including offset error, gain error, and supply current-are fully characterized within this range.
Does the LTC2473CMS#PBF require external components for stable operation?
Yes-the LTC2473CMS#PBF requires three mandatory external capacitors: 0.1µF on REFOUT to GND, 0.1µF on COMP to GND, and 10µF + 0.1µF ceramic on VCC to GND. These are explicitly specified in the Pin Functions and Typical Application sections. Omitting or mismatching the REFOUT/COMP capacitors degrades reference startup time and transition noise, violating datasheet performance guarantees.
How does the LTC2473CMS#PBF handle overrange and underrange input conditions?
The LTC2473CMS#PBF clamps its output code at 0 for (IN+ – IN–) ≤ –VREF and at 65535 for (IN+ – IN–) ≥ VREF, per Table 1 in the datasheet. This hard-clamp behavior ensures predictable digital output under fault or saturation conditions-critical for safety-critical sensor interfaces where out-of-range detection must be unambiguous and deterministic.
Can the LTC2473CMS#PBF be used with a 3.3V microcontroller I²C bus?
Yes-the LTC2473CMS#PBF supports I²C logic levels compatible with 3.3V systems: VIH = 0.7×VCC (min 2.31V at VCC = 3.3V) and VIL = 0.3×VCC (max 0.99V). Its SDA pin is open-drain with 3mA sink capability, allowing direct interface to 3.3V pull-ups. No level-shifting circuitry is needed when VCC = 3.3V, as confirmed in the I²C Inputs and Outputs table.
What is the conversion time for the LTC2473CMS#PBF at 833sps output rate?
At 833sps output rate (SPD = 1), the LTC2473CMS#PBF has a nominal conversion time of 1.2ms, with a maximum of 1.2ms over the full 0°C–70°C range (tCONV2 parameter in Electrical Characteristics). This fixed, deterministic duration enables precise timing control in time-triggered acquisition systems without software polling or interrupt latency uncertainty.
LTC2473CMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-TSSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 833
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- I2C
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- Internal
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- Selectable Address
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2473CMS#PBF FAQ
1.How can I place an order for LTC2473CMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2473CMS#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 LTC2473CMS#PBF reliable?
The price and inventory of LTC2473CMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2473CMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2473CMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2473CMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2473CMS#PBF?
LTC2473CMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2473CMS#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 LTC2473CMS#PBF?
For technical support, including LTC2473CMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2473CMS#PBF requirements.
6.How does Aetrix verify that LTC2473CMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2473CMS#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 LTC2473CMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2473CMS#PBF?
All LTC2473CMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2473CMS#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 LTC2473CMS#PBF part is unused and in its original packaging.
Return procedure for LTC2473CMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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