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Analog Devices Inc. LTC2472IMS#PBF
- Part No.:
- LTC2472IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2472IMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:436
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Product details
Overview
LTC2472IMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential ±VREF input range, selectable 208sps/833sps output rate, and SPI interface - designed for high-accuracy industrial sensor signal conditioning in space-constrained MSOP-12 layouts.
For engineers reviewing the LTC2472IMS#PBF datasheet, LTC2472IMS#PBF pinout, LTC2472IMS#PBF application, or LTC2472IMS#PBF equivalent, this page delivers verified electrical parameters, validated MSOP-12 pin functions, confirmed I-grade (–40°C to +85°C) operation, and real-world multiplexed acquisition use cases - all extracted from the official LTC2470/LTC2472 datasheet (24702fb).
Technical Context
The LTC2472IMS#PBF implements a proprietary delta-sigma architecture with internal oscillator, no-latency single-cycle conversion, and auto-shutdown after each result. Its differential input stage accepts ±1.25V full-scale signals referenced to the on-chip 1.25V reference, enabling direct connection to bridge sensors and isolated amplifiers without external gain or level-shifting.
It supports two oversampling modes: 8,192× at 208sps (4.8ms conversion time) and 2,048× at 833sps (1.2ms), relaxing anti-aliasing filter requirements. The reference features 2ppm/°C max drift over temperature and 0.1% initial accuracy, with programmable sleep mode reducing supply current to ≤2µA when idle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1LSB = 38.1µV step size at ±1.25V full scale for precise sensor digitization. |
| Reference Output Voltage | 1.25V ±3mV (1.247V–1.253V) - stable internal reference eliminates need for external voltage reference ICs. |
| Input Range | Differential ±VREF (±1.25V) - supports true bipolar measurements from strain gauges, RTDs, and current shunts. |
| Offset Error | ±1mV (max) - ensures <0.1% of full scale error at zero differential input, critical for offset-sensitive transducers. |
| Gain Error | ±0.01% of FS (max) - guarantees end-point linearity within 6.5 LSB across full temperature range. |
| Supply Current | 3.5mA (typ) during conversion; ≤2µA (max) in sleep mode - enables battery-powered or low-power IoT node designs. |
| Output Rate | User-selectable 208sps or 833sps - balances resolution (higher OSR at 208sps) vs. throughput (1.2ms latency at 833sps). |
Pinout & Package
Package: 12-lead plastic MSOP (3mm × 4.9mm), exposed pad optional, rated for –40°C to +85°C operation (I-grade).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 (REFOUT) | Reference output | Nominally 1.25V; sets ADC full-scale range; requires 0.1µF bypass to GND for stability and low noise. |
| 2 (COMP) | Reference compensation | Connects to 0.1µF capacitor to GND; controls reference startup time and transition noise. |
| 3 (CS) | Chip select (active low) | Enables SDO output and initiates DATA INPUT/OUTPUT state; rising edge aborts read and starts new conversion. |
| 4 (SDI) | Serial data input | Accepts 4-bit command (EN1/EN2/SPD/SLP) to configure output rate and sleep mode; can be tied to GND/VDD for fixed-rate operation. |
| 5 (SCK) | Serial clock input | Drives SPI timing; supports CPOL=0 or CPOL=1; falling edge clocks out data on SDO; rising edge latches SDI bits. |
| 6 (SDO) | Serial data output | 3-state output delivering 16-bit MSB-first result; high-impedance when CS is high. |
| 7, 11 (GND) | Analog/digital ground | Separate ground pins minimize noise coupling; must connect to low-impedance ground plane. |
| 8 (REF–) | Negative reference input | Sets zero-input point; typically tied to system ground or remote sensor ground for accurate common-mode rejection. |
| 9 (IN+) | Differential positive input | Accepts signal up to VREF; paired with IN– for true differential measurement with >100dB CMRR. |
| 10 (IN–) | Differential negative input | Accepts signal down to 0V; complements IN+ to reject shared noise and enable bipolar sensing. |
| 12 (VCC) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing to suppress supply noise affecting reference and ADC performance. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency delta-sigma conversion | Single-cycle operation delivers valid 16-bit result per conversion with zero filter settling delay - ideal for multiplexed multi-channel systems. |
| Ultra-low average input current | 50nA typical sampling current enables direct RC filtering (e.g., 1kΩ + 0.1µF) with <1LSB added error - eliminates buffer op-amps in many sensor interfaces. |
| Programmable power management | Configurable sleep mode reduces total supply current to ≤2µA by powering down both ADC and reference - extends battery life in portable instrumentation. |
| Integrated 1.25V reference with 2ppm/°C drift | Eliminates external reference component count and layout area while maintaining <±10ppm/°C max drift over full I-grade temperature range. |
| Relaxed anti-aliasing requirements | Oversampling ratios of 8,192 (208sps) or 2,048 (833sps) allow simple first-order RC filters instead of complex active anti-aliasing stages. |
Applications
| Strain Gauge Readout | RTD Temperature Sensing |
|---|---|
Use Scenario: Digitizing mV-level differential output from full-bridge strain gauges in load cells or pressure sensors. IC Role / Device Role / Timing Role: Differential 16-bit ADC with integrated reference provides ratiometric measurement against bridge excitation, rejecting supply and thermal drift. Use Value: Achieves <0.01% FS accuracy without external gain or reference, reducing BOM cost and PCB area in industrial weighing systems. |
Use Scenario: Measuring resistance of 3-wire or 4-wire Pt100/1000 RTDs using constant-current excitation and Kelvin sensing. IC Role / Device Role / Timing Role: High-precision differential ADC rejects lead-wire resistance and common-mode noise while supporting programmable update rates for thermal response matching. Use Value: Enables <0.1°C temperature resolution over –40°C to +125°C with single-chip solution, eliminating calibration complexity in HVAC and process control. |
| Isolated Current Monitoring | Low-Power Environmental Data Loggers |
Use Scenario: Digitizing isolated shunt voltage outputs from analog isolators (e.g., AMC1301) in motor drives or power supplies. IC Role / Device Role / Timing Role: Differential input accepts ±1.25V signals directly from isolated amplifier outputs; SPI interface simplifies microcontroller integration across isolation barrier. Use Value: Delivers 16-bit resolution with <2µA sleep current, enabling continuous monitoring without compromising system standby power budget. |
Use Scenario: Battery-operated soil moisture or air quality sensors requiring long-term autonomous operation with periodic wake-up and measurement. IC Role / Device Role / Timing Role: Ultra-low-power ADC with automatic shutdown between conversions minimizes average current draw; internal oscillator removes need for external crystal. Use Value: Extends 2xAA battery life to >5 years at 1-sample-per-minute duty cycle, validated for –40°C to +85°C field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-precision delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS124S08IPW | 24-bit resolution, 4.19 MSPS max output rate, integrated PGA (1–128×), but requires external reference and higher supply current (350µA active). | Better suited for ultra-high-resolution applications like precision weigh scales; less optimal for low-power, reference-integrated designs. | Select if 24-bit resolution and programmable gain are required; avoid if board space or reference integration are constraints. |
| MAX11206ETL+ | 18-bit resolution, 2.5V internal reference (±10ppm/°C), SPI interface, but only single-ended input and no differential mode. | Appropriate for unipolar sensor interfaces (e.g., thermocouples with cold-junction compensation); cannot replace LTC2472IMS#PBF in true differential bridge applications. | Choose for cost-sensitive, single-ended designs where differential input is unnecessary; not a functional substitute for LTC2472IMS#PBF's bipolar capability. |
Compared with ADS124S08IPW and MAX11206ETL+, the LTC2472IMS#PBF uniquely combines differential input, integrated 1.25V reference with 2ppm/°C drift, and sub-2µA sleep current in an MSOP-12 package - making it optimal for compact, low-power, bipolar sensor systems where external component count must be minimized.
Availability
LTC2472IMS#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded sensor interface applications requiring stable component supply, extended temperature support (–40°C to +85°C), and long-term production continuity.
Supply support for LTC2472IMS#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2470/LTC2472 family was designed specifically for space-constrained, low-power, high-accuracy sensor front-ends - emphasizing integrated references, no-latency conversion, and ultra-low quiescent current in miniature DFN and MSOP packages.
FAQ
What is the operating temperature range for the LTC2472IMS#PBF?
The LTC2472IMS#PBF is specified for –40°C to +85°C operation (I-grade), as confirmed by the "IMS" suffix in the part number and the Order Information table in the official datasheet (24702fb, page 3). This rating applies to both electrical performance and reliability under continuous operation, with thermal characteristics including θJA = 130°C/W for the MSOP package.
Does the LTC2472IMS#PBF require an external clock source?
No, the LTC2472IMS#PBF does not require an external clock source. It includes a fully integrated oscillator, as stated in the Features list and Block Diagram (page 7 of 24702fb). This eliminates the need for crystals, oscillators, or clock distribution circuitry - simplifying design and reducing bill-of-materials cost.
What is the maximum supply current consumption of the LTC2472IMS#PBF during conversion?
The LTC2472IMS#PBF draws a typical supply current of 3.5mA during active conversion (ICC, Conversion), with a maximum of 5mA over the full temperature range, per the Power Requirements table (page 4 of 24702fb). This value is measured with CS = GND and applies to both 208sps and 833sps output rates.
Can the LTC2472IMS#PBF interface directly with a Wheatstone bridge without external amplification?
Yes, the LTC2472IMS#PBF can interface directly with low-output Wheatstone bridges. Its differential ±1.25V input range, 50nA average input current, and integrated 1.25V reference enable ratiometric measurements with minimal external components - as demonstrated in Typical Application circuits (page 1 of 24702fb) and validated by its 1mV offset error and 0.01% gain error specs.
How does the sleep mode function in the LTC2472IMS#PBF, and what is its impact on reference startup time?
In sleep mode (SLP = 1), both the ADC and internal reference power down, reducing supply current to ≤2µA. When awakened by CS going low, the reference requires startup time dependent on COMP and REFOUT capacitor values - 12ms with 0.1µF capacitors (Figure 3, page 8 of 24702fb). During this period, conversion results are invalid until the reference settles.
LTC2472IMS#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:
- SPI
- 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:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 12-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2472IMS#PBF FAQ
1.How can I place an order for LTC2472IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2472IMS#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 LTC2472IMS#PBF reliable?
The price and inventory of LTC2472IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2472IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2472IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2472IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2472IMS#PBF?
LTC2472IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2472IMS#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 LTC2472IMS#PBF?
For technical support, including LTC2472IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2472IMS#PBF requirements.
6.How does Aetrix verify that LTC2472IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2472IMS#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 LTC2472IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2472IMS#PBF?
All LTC2472IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2472IMS#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 LTC2472IMS#PBF part is unused and in its original packaging.
Return procedure for LTC2472IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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