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Analog Devices Inc. LTC2461CDD#TRPBF
- Part No.:
- LTC2461CDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2461CDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,543
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Product details
Overview
LTC2461CDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma analog-to-digital converter with integrated 1.25V precision reference, single-ended input (0V to 1.25V), I²C interface, and ultra-low 200nA sleep current. It operates from 2.7V to 5.5V, delivers 60 conversions per second, and targets high-accuracy sensor monitoring in space-constrained industrial and environmental systems.
For engineers reviewing the LTC2461CDD#TRPBF datasheet, LTC2461CDD#TRPBF pinout, LTC2461CDD#TRPBF application, or LTC2461CDD#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes performance, ±2 LSB typical offset error, 2ppm/°C reference drift (C-grade), internal oscillator eliminating external timing components, and 12-lead 3mm × 3mm DFN package with exposed thermal pad.
Technical Context
The LTC2461CDD#TRPBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration-transparent to the user-ensuring long-term accuracy across temperature. Its input sampling scheme draws only 50nA average input current, enabling direct RC filter interfacing without significant error.
It uses an internal oscillator and supports two I²C slave addresses (0010100b or 1010100b via A0 pin), plus a global address (1110111b) for synchronized multi-device conversion starts. Conversion time is fixed at 13–23ms, with no latency between completion and data availability on the SDA line.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes-guaranteed monotonicity and full code coverage for precision measurement integrity. |
| Reference Voltage | 1.25V ±3mV (1.247V–1.253V), enabling 0V–1.25V single-ended input range with known full-scale scaling. |
| Reference Drift | ±2 ppm/°C max (C-grade)-supports stable measurements over 0°C to 70°C without external trimming. |
| Conversion Rate | 60 conversions/second-fixed 16.6ms nominal cycle time, suitable for real-time sensor polling in embedded control loops. |
| Supply Current | 1.5mA during conversion, 800µA in Nap mode, 200nA in Sleep mode-enables battery-powered or energy-harvesting applications. |
| I²C Interface | Standard/Fast-mode (0–400kHz), two hardware addresses + global sync address-simplifies multi-sensor bus coordination without software arbitration. |
| Input Leakage | ±10nA max at IN pin-minimizes error from high-impedance sources like thermistors or RTDs. |
Pinout & Package
Package: 12-lead 3mm × 3mm plastic DFN (DD) with exposed thermal pad (Pin 13), rated for 0°C to 70°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25V reference voltage source; must be decoupled with ≤0.1µF capacitor to GND for stability. |
| COMP (2) | Reference compensation | Connects to 0.1µF capacitor to GND; sets reference loop stability and noise performance. |
| A0 (3) | I²C address select | Logic level sets slave address: GND → 0010100b, VCC → 1010100b-enables dual-device addressing on same bus. |
| GND (4,7,11,13) | Ground terminals | Multiple low-impedance ground connections-including exposed pad-required for noise immunity and thermal dissipation. |
| SCL (5) | I²C clock input | Slave-only interface; accepts external clock up to 400kHz; rising edge clocks data into device, falling edge clocks data out. |
| SDA (6) | I²C bidirectional data | Open-drain output requiring external pull-up; transmits 16-bit conversion result MSB-first after ACK. |
| REF– (8) | Reference negative input | Connects to system ground or sensor return; defines zero-scale point for ADC transfer function. |
| IN (9) | Analog input (single-ended) | Accepts 0V to 1.25V signals; internal sampling capacitance is 0.35pF-enables high-Z source compatibility. |
| GND (10) | Input ground reference | Dedicated ground return for IN pin; separate from power ground pins to reduce coupling noise. |
| VCC (12) | Positive supply | 2.7V–5.5V operation; requires local 10µF + 0.1µF bypassing to minimize supply-induced errors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.25V reference | 2ppm/°C max drift and 0.1% initial accuracy eliminate need for external reference and trimming circuitry. |
| Zero-latency data output | 16-bit result available immediately after conversion completes-no filter settling delay enables true multiplexed sampling. |
| Proprietary input sampling | 50nA average input current allows direct connection of RC anti-alias filters (e.g., 1kΩ + 0.1µF) with <1 LSB added error. |
| Continuous background calibration | Automatic offset and full-scale correction every cycle ensures accuracy over time and temperature without user intervention. |
| Configurable sleep modes | Independent control of ADC and reference power-down via I²C register-enables fine-grained energy optimization in duty-cycled systems. |
Applications
| Temperature Monitoring | Industrial Sensor Interface |
|---|---|
Use Scenario: Measuring thermistor or RTD voltage outputs in HVAC controllers or process instrumentation. IC Role / Device Role / Timing Role: Single-ended ADC digitizing ratiometric sensor signals referenced to its internal 1.25V rail. Use Value: Eliminates external reference and calibration components while maintaining ±2 LSB offset error across 0°C–70°C. | Use Scenario: Reading bridge-based pressure or load cell outputs in factory automation modules. IC Role / Device Role / Timing Role: High-impedance-tolerant front-end ADC with low input current minimizing signal-source loading. Use Value: 50nA average input current prevents gain error in high-resistance sensor networks, preserving measurement fidelity. |
| Portable Environmental Sensors | Embedded System Health Monitoring |
Use Scenario: Battery-powered air quality monitors logging CO₂, humidity, or VOC sensor outputs over weeks. IC Role / Device Role / Timing Role: Ultra-low-power ADC entering 200nA sleep state between 60Hz conversions. Use Value: Enables >1-year operation on coin-cell batteries by reducing quiescent current 7,500× versus active conversion mode. | Use Scenario: Real-time voltage/current monitoring of power rails in network switches or edge AI accelerators. IC Role / Device Role / Timing Role: Dedicated rail monitor with I²C accessibility and deterministic 16.6ms conversion timing. Use Value: Predictable timing and no-latency output simplify firmware integration in time-critical health-check routines. |
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 differential input, programmable gain amplifier (PGA), 128SPS max, no integrated reference-requires external 2.048V reference. | Supports multi-channel sensing and variable gain; lacks internal reference and ultra-low sleep current (0.15µA vs 0.2µA). | Select when multi-input flexibility and PGA are needed; avoid if reference integration or sub-µA sleep is mandatory. |
| MCP3424-E/ST | 4-channel, 18-bit resolution, 3.75SPS–15SPS, internal 2.048V reference (15ppm/°C), I²C interface, 2.7–5.5V supply. | Higher resolution but slower speed; reference drift (15ppm/°C) is 7.5× worse than LTC2461CDD#TRPBF's 2ppm/°C. | Select for ultra-high-resolution static measurements; avoid for dynamic or wide-temperature applications requiring tight reference stability. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2461CDD#TRPBF uniquely combines integrated 1.25V reference with 2ppm/°C drift, 60SPS throughput, and 200nA sleep current in a 3mm × 3mm DFN-making it optimal for compact, battery-sensitive, single-input precision monitoring where reference accuracy and power efficiency are co-critical.
Availability
LTC2461CDD#TRPBF is available at Aetrix Electronics and suitable for industrial sensor nodes, portable environmental monitors, and embedded power-rail health checkers requiring stable component supply, guaranteed C-grade temperature performance (0°C to 70°C), and long-term production continuity.
Supply support for LTC2461CDD#TRPBF 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 LTC2461CDD#TRPBF belongs to ADI's ultra-precision delta-sigma ADC family, designed specifically for space-constrained, low-power applications demanding high DC accuracy, integrated references, and simplified I²C-based system integration.
FAQ
What is the operating temperature range for the LTC2461CDD#TRPBF?
The LTC2461CDD#TRPBF is specified for 0°C to 70°C ambient operation (C-grade). This range is confirmed in the "ORDER INFORMATION" table and applies to all electrical characteristics unless otherwise noted. The device uses a 12-lead DFN package with exposed pad optimized for thermal performance within this envelope. Operation outside this range may violate parametric guarantees and is not supported.
Does the LTC2461CDD#TRPBF require external components for basic operation?
No, the LTC2461CDD#TRPBF requires only three external capacitors for full functionality: 0.1µF on REFOUT, 0.1µF on COMP, and 10µF + 0.1µF on VCC. It includes an internal oscillator, integrated 1.25V reference, and I²C interface-no crystal, external reference, or timing resistors are needed. Pull-up resistors on SDA/SCL are required per I²C bus standards but are not part of the ADC's core functional circuitry.
How does the LTC2461CDD#TRPBF handle input overrange and underrange conditions?
The LTC2461CDD#TRPBF clamps output codes at digital extremes: input voltages below 0V produce code 0x0000, and inputs above 1.25V produce code 0xFFFF. This behavior is explicitly defined in the "Input Voltage Range (LTC2461)" section. No saturation recovery delay occurs-the next conversion proceeds normally regardless of prior overrange events.
Can the LTC2461CDD#TRPBF be used in differential-input configurations?
No, the LTC2461CDD#TRPBF is strictly a single-ended ADC (IN pin referenced to GND). Differential input capability is exclusive to the LTC2463 variant (e.g., LTC2463CDD#TRPBF). Pin 9 is labeled "IN", and Pin 10 is "GND"-not "IN–". Attempting differential use violates the device's specified topology and invalidates accuracy guarantees.
What is the significance of the "#TRPBF" suffix in LTC2461CDD#TRPBF?
The "#TRPBF" suffix denotes tape-and-reel packaging (TR), lead-free finish (PBF), and RoHS compliance. It indicates the part is supplied in industry-standard 7" reels (2500 units/reel) with matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3. This packaging format is optimized for automated SMT assembly and qualifies for high-reliability industrial production environments.
LTC2461CDD#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 60
- 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:
- 0°C ~ 70°C
- Supplier Device Package:
- 12-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2461CDD#TRPBF FAQ
1.How can I place an order for LTC2461CDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2461CDD#TRPBF 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 LTC2461CDD#TRPBF reliable?
The price and inventory of LTC2461CDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2461CDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2461CDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2461CDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2461CDD#TRPBF?
LTC2461CDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2461CDD#TRPBF 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 LTC2461CDD#TRPBF?
For technical support, including LTC2461CDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2461CDD#TRPBF requirements.
6.How does Aetrix verify that LTC2461CDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2461CDD#TRPBF 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 LTC2461CDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2461CDD#TRPBF?
All LTC2461CDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2461CDD#TRPBF, 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 LTC2461CDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2461CDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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