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Analog Devices Inc. LTC2473IMS#PBF
- Part No.:
- LTC2473IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2473IMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
LTC2473IMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit differential ΔΣ ADC with integrated 1.25V precision reference, I²C interface, ±VREF input range, and selectable 208sps/833sps output rate - designed for high-accuracy sensor digitization in industrial monitoring and embedded instrumentation.
For engineers reviewing the LTC2473IMS#PBF datasheet, LTC2473IMS#PBF pinout, LTC2473IMS#PBF application, or LTC2473IMS#PBF equivalent, key selection criteria include its 2µA max sleep current, 2ppm/°C reference drift (I-grade), 1mV offset error, and MSOP-12 package compatibility with space-constrained PCB layouts.
Technical Context
The LTC2473IMS#PBF implements a delta-sigma architecture with oversampling ratios of 8,192 (208sps) or 2,048 (833sps), enabling relaxed anti-aliasing filter requirements. Its proprietary input sampling scheme draws only 50nA average input current, minimizing external RC filter error.
It operates from a single 2.7V–5.5V supply, integrates an internal oscillator, and supports I²C fast-mode (400kHz). Conversion settling is single-cycle with no latency - critical for multiplexed sensor systems requiring deterministic timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct codes over full-scale range |
| Reference Voltage | 1.25V ±3mV - sets ±1.25V differential input range; initial accuracy ±0.1% |
| Reference Drift | ±5ppm/°C (I-grade) - ensures <±0.5mV drift over –40°C to +85°C operating range |
| Offset Error | ±1mV - contributes ≤0.08% FS error at full scale |
| Gain Error | ±0.01% FS - enables high-precision ratiometric measurements without calibration |
| Supply Current | 3.5mA typ (conversion), 2µA max (sleep) - supports battery-powered or low-power wake-up architectures |
| Output Rate | Selectable 208sps or 833sps - balances resolution, noise, and system throughput |
Pinout & Package
Package: 12-lead MSOP (3mm × 3mm), exposed pad grounded, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V reference source; requires 0.1µF bypass to GND for stability and low noise |
| COMP (2) | Reference compensation | Internal reference compensation node; must connect 0.1µF capacitor to GND for optimal startup time and noise |
| A0 (3) | I²C address select | Configures slave address: 0010100 (A0 = GND) or 1010100 (A0 = VCC) |
| GND (4,7,11) | Ground return | Multiple ground pins minimize ground bounce; exposed pad (not numbered) must be soldered to PCB ground plane |
| SCL (5) | I²C clock input | Accepts up to 400kHz clock; device acts as I²C slave only |
| SDA (6) | I²C bidirectional data | Open-drain output during data transfer; requires external pull-up resistor (typically 1.7kΩ to VCC) |
| REF– (8) | Negative reference input | Sets zero-input level; tied directly to system ground or sensor ground sense point |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF; used with IN– to measure differential signals (e.g., bridge sensors) |
| IN– (10) | Differential negative input | Accepts voltage down to 0V; complements IN+ for true differential measurement with common-mode rejection |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires 10µF + 0.1µF parallel bypassing at pin |
Key Features
| Feature | Design Value |
|---|---|
| Differential input architecture | Enables precise measurement of low-level signals (e.g., load cells, RTDs) with inherent common-mode noise rejection |
| Integrated 1.25V reference | Eliminates external reference IC and associated layout complexity while maintaining ±5ppm/°C drift (I-grade) |
| Single-cycle conversion with auto shutdown | Guarantees deterministic timing for multiplexed systems; no filter settling delay or redundant outputs |
| Ultra-low input sampling current (50nA) | Permits direct connection of RC antialiasing filters (e.g., 1kΩ + 0.1µF) with <1LSB added error |
| Configurable sleep mode (SLP bit) | Reduces total supply current to 2µA max by powering down both ADC and reference - ideal for intermittent sensing |
Applications
| Industrial Process Monitoring | Environmental Sensor Hub |
|---|---|
Use Scenario: Continuous monitoring of pressure, flow, and temperature transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Differential ADC digitizing 4–20mA loop-derived voltages with ratiometric accuracy against internal reference. Use Value: 16-bit resolution and ±5ppm/°C reference drift ensure <0.1% total measurement uncertainty across wide ambient temperature swings. | Use Scenario: Battery-powered air quality node measuring CO₂, humidity, and particulate sensors. IC Role / Device Role / Timing Role: Low-power ADC acquiring differential outputs from electrochemical and capacitive sensors on scheduled intervals. Use Value: 2µA max sleep current extends battery life to multi-year operation; integrated reference avoids calibration drift between sensor and reference. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
Use Scenario: Precision thermistor or RTD readout in medical diagnostic equipment. IC Role / Device Role / Timing Role: High-accuracy differential converter interfacing with 3-wire or 4-wire RTD configurations using Kelvin sensing. Use Value: 1mV offset error and 0.01% gain error enable <0.1°C temperature resolution without factory calibration. | Use Scenario: Retrofitting legacy 12-bit ADC subsystems in industrial controllers to improve resolution and reduce external component count. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (MSOP-12) delivering 4× higher resolution with integrated reference and I²C simplicity. Use Value: Eliminates need for external reference, op-amp buffers, and anti-aliasing tuning - reduces BOM cost and layout area by >30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit, 860sps, internal 2.048V reference (±15ppm/°C), no integrated oscillator, requires external clock sync | Higher reference drift; lacks auto-shutdown and ultra-low input current; better suited for lower-cost consumer-grade systems | Choose ADS1115IDGSR when board space allows larger external filtering and reference stability is less critical than cost. |
| MAX11613AUT+T | 16-bit, 1ksps, internal 2.048V reference (±20ppm/°C), SPI interface, no differential input mode | No differential input support; higher reference drift; SPI adds MCU overhead vs I²C; lower power-down current (1µA) | Choose MAX11613AUT+T only if SPI is already dominant in system architecture and single-ended inputs suffice. |
Compared with ADS1115IDGSR and MAX11613AUT+T, the LTC2473IMS#PBF provides superior reference stability (±5ppm/°C vs ±15–20ppm/°C), true differential input capability, and proprietary low-input-current sampling - making it optimal for high-accuracy industrial and medical sensor interfaces where long-term calibration stability is mandatory.
Availability
LTC2473IMS#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LTC2473IMS#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 and maintains its high-precision analog product lines with rigorous automotive and industrial qualification standards.
The LTC2473IMS#PBF belongs to Linear's precision delta-sigma ADC family, engineered specifically for low-power, high-accuracy sensor signal acquisition in harsh environments - emphasizing reference integrity, input simplicity, and deterministic timing.
FAQ
What is the operating temperature range for the LTC2473IMS#PBF?
The LTC2473IMS#PBF is specified for –40°C to +85°C operation (I-grade), validated across this full range for parameters including reference drift (±5ppm/°C), offset error (±1mV), and supply current. This makes it suitable for deployment in industrial enclosures and outdoor environmental housings without derating.
Does the LTC2473IMS#PBF require external components to operate?
Yes - the LTC2473IMS#PBF requires three mandatory external capacitors: 0.1µF on REFOUT to GND, 0.1µF on COMP to GND, and 10µF + 0.1µF parallel bypass on VCC. No external crystal or clock source is needed due to its integrated oscillator, and no external reference is required thanks to its on-chip 1.25V precision reference.
How does the LTC2473IMS#PBF achieve ultra-low input current?
The LTC2473IMS#PBF uses a proprietary input sampling scheme that reduces average input current to 50nA - several orders of magnitude lower than conventional delta-sigma converters. This allows direct connection of simple RC filters (e.g., 1kΩ + 0.1µF) with <1LSB added error, eliminating buffer amplifiers in most sensor front-ends.
Can the LTC2473IMS#PBF measure single-ended signals?
No - the LTC2473IMS#PBF is strictly a differential-input ADC with ±VREF range (i.e., IN+ and IN– inputs). For single-ended operation, the pin-compatible LTC2471IMS#PBF is the designated variant; both share identical package, I²C interface, reference, and power characteristics but differ in input topology.
What I²C address options does the LTC2473IMS#PBF support?
The LTC2473IMS#PBF supports two 7-bit I²C slave addresses: 0010100 (0x24) when A0 is tied to GND, and 1010100 (0x54) when A0 is tied to VCC. Both addresses are compatible with standard and fast-mode I²C (up to 400kHz), and the device operates exclusively as a slave with no master capability.
LTC2473IMS#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2473IMS#PBF FAQ
1.How can I place an order for LTC2473IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2473IMS#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 LTC2473IMS#PBF reliable?
The price and inventory of LTC2473IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2473IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2473IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2473IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2473IMS#PBF?
LTC2473IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2473IMS#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 LTC2473IMS#PBF?
For technical support, including LTC2473IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2473IMS#PBF requirements.
6.How does Aetrix verify that LTC2473IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2473IMS#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 LTC2473IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2473IMS#PBF?
All LTC2473IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2473IMS#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 LTC2473IMS#PBF part is unused and in its original packaging.
Return procedure for LTC2473IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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