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Analog Devices Inc. LTC2460IDD#TRPBF
- Part No.:
- LTC2460IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2460IDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,885
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Product details
Overview
LTC2460IDD#TRPBF from Analog Devices (formerly Linear Technology) is a single-ended, 16-bit delta-sigma ADC with integrated 1.25V precision reference, SPI interface, and ultra-low 2µA sleep current. It operates from 2.7V to 5.5V, delivers 60 conversions per second, and achieves ±2 LSB offset error and ±0.01% gain error - enabling high-accuracy sensor digitization in battery-powered environmental monitoring systems.
For engineers reviewing the LTC2460IDD#TRPBF datasheet, LTC2460IDD#TRPBF pinout, LTC2460IDD#TRPBF application, or LTC2460IDD#TRPBF equivalent, key selection criteria include its guaranteed no-missing-codes resolution, internal reference drift ≤±5 ppm/°C (I-grade), single-cycle settling for multiplexed inputs, 50 nA average input sampling current, and compatibility with minimal external filtering (e.g., 1kΩ + 0.1µF).
Technical Context
The LTC2460IDD#TRPBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration, eliminating user intervention while maintaining accuracy across –40°C to +85°C. Its integrated oscillator enables autonomous operation without external timing components.
It uses a fixed 16.6 ms conversion time (max 23 ms), supports CPOL = 0 or 1 SPI modes, and transitions automatically between CONVERT → NAP/SLEEP → DATA INPUT/OUTPUT states. The reference startup time is 12 ms after CS assertion when CREFOUT = CCOMP = 0.1 µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit, no missing codes - ensures monotonicity and unambiguous digital representation of analog input. |
| Reference Voltage | 1.25 V ±3 mV (±0.24%) - sets full-scale input range (0 V to 1.25 V) with ±5 ppm/°C max drift over –40°C to +85°C. |
| Conversion Rate | 60 conversions/second - fixed 16.6 ms nominal conversion time enables deterministic timing in multiplexed systems. |
| Supply Current | 1.5 mA (conversion), 800 µA (nap), 0.2 µA (sleep) - supports ultra-low-power operation with automatic power-state management. |
| Input Sampling Current | 50 nA average - allows direct interface with high-impedance sources and simple RC filters (e.g., 1 kΩ + 0.1 µF adds <1 LSB error). |
| Offset Error | ±2 LSB max - translates to ±38.1 µV error at 1.25 V reference, critical for DC-coupled sensor front-ends. |
| Gain Error | ±0.01% FS - contributes ≤130 µV error at full scale, enabling high-precision ratiometric or absolute measurements. |
Pinout & Package
Package: 12-lead (3 mm × 3 mm) plastic DFN with exposed pad (Pin 13 = GND). RoHS-compliant, lead-free finish. Thermal resistance θJA = 43°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25 V; sets ADC full-scale range; requires 0.1 µF bypass to GND; cannot be overdriven. |
| COMP (2) | Reference compensation | Stabilizes internal reference; must connect 0.1 µF capacitor to GND (≤ CREFOUT value). |
| CS (3) | Chip select (active low) | Enables SDO output and initiates DATA INPUT/OUTPUT state; HIGH places SDO in high-Z. |
| SDI (4) | Serial data input | 4-bit programming interface (EN1/EN2/SPD/SLP); can be tied to GND/VCC for simplified configuration. |
| SCK (5) | Serial clock input | Controls data transfer timing; supports CPOL = 0 or 1; min/max pulse width 250 ns. |
| SDO (6) | Serial data output | 3-state output; delivers 16-bit MSB-first result; indicates conversion status when SCK = HIGH and CS = LOW. |
| GND (7, 11) | Ground | Low-impedance ground connection points; exposed pad (Pin 13) must also connect to PCB ground plane. |
| REF– (8) | Negative reference input | Sets zero-input level; typically tied to system ground or sensor ground sense point. |
| IN (9) | Analog input (single-ended) | Input voltage range: 0 V to VREF; clamped at 0 (under-range) or 65535 (over-range). |
| GND (10) | Ground (LTC2460 only) | Dedicated ground return for IN pin; separates analog input path from other GND pins. |
| VCC (12) | Positive supply | 2.7 V to 5.5 V; requires local decoupling: 10 µF + 0.1 µF ceramic capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency serial output | Data corresponds exactly to last completed conversion - eliminates filter delay and enables true multiplexed sampling without timing overhead. |
| Auto-calibrating architecture | Continuous internal offset and full-scale calibration runs transparently every conversion - maintains accuracy over temperature and time without user intervention. |
| Ultra-low input bias current | 50 nA average sampling current - permits direct connection to high-impedance sensors (e.g., thermistors, RTDs) and simplifies anti-aliasing filter design. |
| Configurable power states | Three operational modes (CONVERT/NAP/SLEEP) controlled via SDI or CS/SCK timing - reduces supply current from 1.5 mA to 0.2 µA during idle periods. |
| Integrated oscillator | Eliminates need for external crystal or clock source - reduces BOM count and layout complexity in space-constrained designs. |
Applications
| Environmental Monitoring | Industrial Process Control |
|---|---|
Use Scenario: Measuring temperature, humidity, and gas concentration using resistive or capacitive sensors in remote, battery-operated nodes. IC Role / Device Role / Timing Role: Single-ended ADC digitizing low-bandwidth sensor outputs with high DC accuracy and minimal power consumption. Use Value: 16-bit resolution and ±2 LSB offset error enable sub-0.1°C thermal resolution; 2 µA sleep current extends 10-year battery life in wireless sensor networks. |
Use Scenario: Digitizing 4–20 mA loop signals, strain gauge bridges, or pressure transducers in PLC I/O modules. IC Role / Device Role / Timing Role: Precision front-end ADC providing ratiometric measurement against internal 1.25 V reference for stable gain calibration. Use Value: ±0.01% gain error and ±5 ppm/°C reference drift ensure <0.02% total system error over industrial temperature range (–40°C to +85°C). |
| Embedded System Upgrades | Portable Instrumentation |
Use Scenario: Replacing legacy 12-bit SAR ADCs in existing microcontroller-based designs to improve measurement fidelity without board redesign. IC Role / Device Role / Timing Role: Pin-compatible upgrade offering higher resolution, lower power, and integrated reference - reducing external component count. Use Value: SPI interface and identical 12-lead DFN footprint allow drop-in replacement; no latency simplifies firmware migration from SAR to delta-sigma architecture. |
Use Scenario: High-accuracy handheld multimeters, data loggers, or portable medical devices requiring compact, low-power signal acquisition. IC Role / Device Role / Timing Role: Primary ADC capturing DC-coupled analog signals with minimal external support circuitry. Use Value: Internal oscillator and 0.1 µF reference/compensation capacitors reduce solution size to <10 mm²; 1.5 mA active current enables >24-hour runtime on coin-cell batteries. |
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, I²C interface; 16-bit resolution; 2–860 SPS programmable rate; no integrated reference (requires external 2.048 V ref). | Supports multi-channel differential/single-ended sensing; lacks auto-calibration and ultra-low sleep current (0.15 µA vs LTC2460IDD#TRPBF's 0.2 µA). | Preferred for multi-sensor systems needing I²C bus efficiency; less suitable for ultra-low-power single-channel DC measurement where internal reference stability is critical. |
| MCP3424-E/ST | 4-channel, I²C interface; 18-bit resolution; 15 SPS (18-bit) to 240 SPS (12-bit); internal 2.048 V reference (±2 ppm/°C drift). | Higher resolution but slower max rate (240 SPS @ 12-bit); no SPI option; reference not user-accessible for ratiometric scaling. | Better for high-resolution static measurements; inferior for 60-SPS real-time logging or SPI-based microcontroller integration. |
Compared with ADS1115IDGSR and MCP3424-E/ST, the LTC2460IDD#TRPBF offers deterministic 60-SPS timing, SPI-native interface, guaranteed no-missing-codes performance, and integrated reference optimized for single-ended DC-coupled sensor interfaces - making it uniquely suited for compact, low-power, high-accuracy embedded measurement nodes.
Availability
LTC2460IDD#TRPBF is available at Aetrix Electronics and suitable for environmental monitoring, industrial process control, and portable instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed I-grade (–40°C to +85°C) performance.
Supply support for LTC2460IDD#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 LTC2460IDD#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for ultra-low-power, high-accuracy sensor digitization in space- and energy-constrained embedded systems.
FAQ
What is the operating temperature range of the LTC2460IDD#TRPBF?
The LTC2460IDD#TRPBF is rated for –40°C to +85°C (I-grade), verified across all electrical specifications including reference drift (±5 ppm/°C max), offset error (±2 LSB), and supply current. This range is confirmed in the Absolute Maximum Ratings table and supported by characterization data in Figures G04–G09 of the datasheet.
Does the LTC2460IDD#TRPBF require an external crystal or clock source?
No, the LTC2460IDD#TRPBF includes a fully integrated oscillator and requires no external timing components. Its conversion timing is self-contained and deterministic (16.6 ms nominal), enabling reliable operation in systems where board space or BOM count must be minimized - a key advantage over many competing sigma-delta ADCs.
How does the LTC2460IDD#TRPBF handle input overrange and underrange conditions?
The LTC2460IDD#TRPBF clamps output codes at 0 for inputs below ground and at 65535 for inputs above VREF (1.25 V). It does not saturate gradually - the transition is hard-clipped. This behavior is explicitly defined in the "Input Voltage Range (LTC2460)" section and validated in Figure F03 of the datasheet.
Can the internal reference of the LTC2460IDD#TRPBF be disabled to reduce power further?
Yes - the LTC2460IDD#TRPBF supports reference shutdown via the SLP bit in the SDI programming word. When SLP = 1, both ADC and reference power down after conversion, reducing total supply current to 0.2 µA. Reference restarts upon next CS assertion, with 12 ms stabilization time required before valid conversion.
Is the LTC2460IDD#TRPBF pin-compatible with the LTC2462 series?
Yes - the LTC2460IDD#TRPBF and LTC2462IDD#TRPBF share identical pinouts, package dimensions, and software interface. The only functional difference is input topology: LTC2460IDD#TRPBF is single-ended (IN/GND), while LTC2462IDD#TRPBF is differential (IN+/IN–). This allows hardware reuse across both architectures with only firmware adaptation.
LTC2460IDD#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:
- 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-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2460IDD#TRPBF FAQ
1.How can I place an order for LTC2460IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2460IDD#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 LTC2460IDD#TRPBF reliable?
The price and inventory of LTC2460IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2460IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2460IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2460IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2460IDD#TRPBF?
LTC2460IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2460IDD#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 LTC2460IDD#TRPBF?
For technical support, including LTC2460IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2460IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2460IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2460IDD#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 LTC2460IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2460IDD#TRPBF?
All LTC2460IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2460IDD#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 LTC2460IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2460IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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