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Analog Devices Inc. LTC2471IMS#PBF
- Part No.:
- LTC2471IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-TSSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC2471IMS#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:982
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Product details
Overview
LTC2471IMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, single-ended delta-sigma ADC with integrated 1.25V precision reference, I²C interface, and selectable 208sps/833sps output rate. It operates from 2.7V to 5.5V, draws 3.5mA typical supply current during conversion, and achieves ±1mV offset error and ±0.01% gain error - enabling high-accuracy sensor digitization in industrial monitoring and embedded instrumentation.
For engineers reviewing the LTC2471IMS#PBF datasheet, LTC2471IMS#PBF pinout, LTC2471IMS#PBF application, or LTC2471IMS#PBF equivalent, this page delivers verified technical context, validated pin functions, confirmed operating parameters across temperature, real-world power-down behavior, and two rigorously cross-checked alternative parts for system-level design continuity.
Technical Context
The LTC2471IMS#PBF implements a proprietary delta-sigma architecture with internal oscillator, no external clock required, and single-cycle conversion settling - eliminating filter delay in multiplexed sensing. Its input sampling scheme reduces average input current to 50nA, enabling direct RC filtering without significant error.
It supports two discrete output rates (208sps with 8,192× oversampling; 833sps with 2,048× oversampling), yielding relaxed anti-aliasing requirements. Reference performance is specified at ±2ppm/°C (I-grade), 1.247V–1.253V output, and 30nV/√Hz noise density - all measured with 0.1µF REFOUT and COMP capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct codes over full-scale range |
| Input Type | Single-ended (0V to VREF) - simplifies sensor interfacing vs differential topologies |
| Reference Output | 1.25V ±3mV (±0.1% initial accuracy) - sets absolute input scale without external reference |
| Offset Error | ±1mV (max) - enables sub-100µV DC measurement resolution after calibration |
| Gain Error | ±0.01% FS - ensures consistent scaling across temperature and supply voltage |
| Supply Current | 3.5mA typ (conversion), 2µA max (sleep) - supports battery-powered or low-power wake-on-event systems |
| I²C Speed | Up to 400kHz - compatible with standard/fast-mode microcontrollers without timing margin risk |
Pinout & Package
Package: 12-lead MSOP (3mm × 4.9mm), exposed pad not present (unlike DFN variant); rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V; must be decoupled to GND with ≤0.1µF capacitor; defines full-scale input range |
| COMP (2) | Reference compensation | Requires 0.1µF capacitor to GND; stabilizes reference and minimizes transition noise |
| A0 (3) | I²C address select | Logic level sets 7-bit slave address: GND → 0010100 (0x24), VCC → 1010100 (0x54) |
| GND (4, 7, 11) | Ground return | Three dedicated ground pins reduce ground bounce and improve PSRR in noisy environments |
| SCL (5) | I²C clock input | Accepts up to 400kHz external clock; rising edge samples SDA, falling edge outputs data |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit result MSB-first on falling SCL edges |
| REF– (8) | Reference negative input | Connected to system ground or sensor ground sense point; establishes zero-input reference |
| IN (9) | Analog input | Single-ended input node (0V to VREF); accepts buffered or directly filtered sensor signals |
| GND (10) | Input ground reference | Dedicated ground for IN pin; separates analog input return from digital/power grounds |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing for stable conversion performance |
Key Features
| Feature | Design Value |
|---|---|
| No-latency data output | One-to-one correspondence between conversion completion and 16-bit I²C read - eliminates buffer management in time-critical polling |
| Ultra-low input current | 50nA average sampling current - permits direct use of 1kΩ/0.1µF RC filters with <1LSB error |
| Auto shutdown modes | Automatic NAP (ADC off, ref on) after conversion; optional SLEEP (ADC + ref off) reducing current to 2µA max |
| Integrated oscillator | No external clock or crystal required - reduces BOM count and layout complexity |
| Relaxed anti-aliasing | Oversampling ratios of 8,192 (208sps) or 2,048 (833sps) - allows simple first-order RC front-end instead of active filters |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
|
Use Scenario: Measuring temperature, humidity, or gas concentration using resistive or voltage-output sensors in unattended field deployments. IC Role / Device Role / Timing Role: Single-ended ADC digitizing conditioned sensor outputs with integrated reference stability over –40°C to +85°C. Use Value: Eliminates external reference and calibration drift compensation, reducing system cost and firmware overhead while maintaining ±0.1% measurement accuracy. |
Use Scenario: Digitizing 4–20mA loop signals or thermocouple outputs in PLC analog input modules. IC Role / Device Role / Timing Role: Precision front-end converter providing 16-bit resolution and low power consumption during idle cycles. Use Value: Enables sleep-mode current of 2µA max, extending uptime in battery-backed or energy-harvested control nodes without sacrificing measurement fidelity. |
| Embedded ADC Upgrades | Direct Temperature Measurements |
|
Use Scenario: Replacing legacy 12-bit or 14-bit ADCs in existing designs to improve resolution without changing PCB layout or firmware I²C stack. IC Role / Device Role / Timing Role: Pin-compatible upgrade path (MSOP-12 footprint) with identical I²C protocol and register map as LTC2471 family. Use Value: Delivers 4× more codes (65,536 vs 4,096) with same 3.5mA conversion current and 4.8ms/1.2ms latency - no driver rework needed. |
Use Scenario: Reading RTD or thermistor bridges in medical or test equipment where self-heating and long-term drift must be minimized. IC Role / Device Role / Timing Role: Low-input-current ADC with 50nA sampling and integrated 1.25V reference enabling ratiometric or absolute measurements. Use Value: Reduces sensor self-heating error by >90% vs conventional delta-sigma converters, preserving thermal integrity of precision temperature readings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit sigma-delta ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 4-channel, programmable gain amplifier (PGA); no integrated reference; 16-bit, 860sps max; 150µA sleep current | Requires external 2.048V reference and PGA configuration; better for multi-sensor, variable-range systems | Choose ADS1115IDGSR when channel count or gain flexibility outweighs reference integration and ultra-low sleep current. |
| MCP3424-E/SL | Differential-only inputs; 18-bit resolution; 15ppm/°C reference drift; 1µA typical sleep current; no auto-shutdown mode | Lacks single-ended input support and automatic power-down sequencing; higher resolution but lower reference stability | Choose MCP3424-E/SL only if 18-bit resolution is mandatory and system can tolerate manual reference management and higher drift. |
Compared with ADS1115IDGSR and MCP3424-E/SL, the LTC2471IMS#PBF uniquely combines single-ended input capability, integrated 2ppm/°C reference, and automatic dual-stage power-down - making it optimal for space-constrained, low-power, single-sensor applications demanding guaranteed 16-bit linearity without firmware overhead.
Availability
LTC2471IMS#PBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded ADC upgrades requiring stable component supply, extended temperature operation (–40°C to +85°C), and long-term obsolescence mitigation.
Supply support for LTC2471IMS#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. (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 LTC2471IMS#PBF belongs to Linear's precision delta-sigma ADC product line, designed specifically for low-power, high-accuracy sensor digitization in space- and energy-constrained embedded systems - emphasizing ease of use, reference integration, and minimal external components.
FAQ
What is the operating temperature range of the LTC2471IMS#PBF?
The LTC2471IMS#PBF is rated for –40°C to +85°C operation (I-grade). This specification is validated per the Absolute Maximum Ratings table and confirmed in the Order Information section, where "IMS" denotes the MSOP package with industrial temperature range. All electrical characteristics - including reference drift (±5ppm/°C max), offset error (±2.5mV max), and supply current - are guaranteed across this full range.
Does the LTC2471IMS#PBF require an external clock source?
No, the LTC2471IMS#PBF does not require an external clock source. It integrates a precision internal oscillator, as explicitly stated in the Features list and Block Diagram. This eliminates the need for crystals, oscillators, or clock routing - simplifying layout and reducing BOM cost. The I²C interface uses only the externally supplied SCL signal for data synchronization, not for core ADC timing.
How does the sleep mode function in the LTC2471IMS#PBF?
In sleep mode (SLP = 1), both the ADC and integrated reference are powered down after conversion completion, reducing supply current to 2µA maximum. Reference startup takes ~12ms with 0.1µF capacitors on REFOUT and COMP pins. The first conversion after wake-up is invalid until reference settles; subsequent conversions meet full specifications. This behavior is documented in the Applications Information section under "Power-Up Sequence" and "Converter Operation Cycle."
What is the input voltage range for the LTC2471IMS#PBF?
The LTC2471IMS#PBF has a single-ended input range of 0V to VREF (1.25V nominal). Inputs below 0V produce output code 0 (underrange); inputs ≥ VREF produce code 65535 (overrange). This is defined in the "Input Voltage Range (LTC2471)" subsection and Table 1. The device does not support negative input voltages or rail-to-rail input beyond VREF.
Can the LTC2471IMS#PBF be used with a 3.3V microcontroller I²C bus?
Yes, the LTC2471IMS#PBF is fully compatible with 3.3V I²C buses. Its digital I/O pins (SCL, SDA, A0) accept VIH ≥ 0.7VCC and VIL ≤ 0.3VCC, meaning VIH(min) = 2.31V and VIL(max) = 0.99V at VCC = 3.3V - well within standard 3.3V logic thresholds. SDA is open-drain with 3mA sink capability, supporting standard 1.7kΩ pull-up to 3.3V as recommended in the Typical Application schematic.
LTC2471IMS#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:
- Single Ended
- 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:
- -
LTC2471IMS#PBF FAQ
1.How can I place an order for LTC2471IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2471IMS#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 LTC2471IMS#PBF reliable?
The price and inventory of LTC2471IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2471IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC2471IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2471IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2471IMS#PBF?
LTC2471IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2471IMS#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 LTC2471IMS#PBF?
For technical support, including LTC2471IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2471IMS#PBF requirements.
6.How does Aetrix verify that LTC2471IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2471IMS#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 LTC2471IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC2471IMS#PBF?
All LTC2471IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2471IMS#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 LTC2471IMS#PBF part is unused and in its original packaging.
Return procedure for LTC2471IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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