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Analog Devices Inc. LTC2462IDD#TRPBF
- Part No.:
- LTC2462IDD#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2462IDD#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,669
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Product details
Overview
LTC2462IDD#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential ±VREF input range, and SPI interface. It operates from 2.7V to 5.5V, achieves 60 conversions per second, features 2 LSB offset error and ±0.01% gain error, and targets high-accuracy sensor digitization in industrial monitoring systems.
For engineers reviewing the LTC2462IDD#TRPBF datasheet, LTC2462IDD#TRPBF pinout, LTC2462IDD#TRPBF application, or LTC2462IDD#TRPBF equivalent, key selection considerations include its –40°C to +85°C operating range, 2 µA max sleep current, internal oscillator eliminating external timing components, and differential input architecture enabling noise-rejecting measurements of bridge sensors and thermocouples.
Technical Context
The LTC2462IDD#TRPBF implements a proprietary delta-sigma modulator with continuous internal offset and full-scale calibration, ensuring stable accuracy across temperature without user intervention. Its differential input stage accepts ±1.25V signals referenced to REF–, and its integrated 1.25V reference exhibits ≤5 ppm/°C drift over the I-grade range.
Conversion is initiated automatically after power-up or CS assertion, completes in 13–23 ms, and outputs 16-bit serial data via SPI with no latency-each result corresponds precisely to the most recently completed conversion. The device supports both CPOL = 0 and CPOL = 1 clock modes and enters NAP (ADC-only off) or SLEEP (ADC + reference off) states to achieve 200 nA supply current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full dynamic range utilization. |
| Input Range | Differential ±VREF (±1.25 V) - enables true bipolar measurement of transducer outputs without level-shifting. |
| Reference Accuracy | 1.247 V to 1.253 V (±0.1% initial), ≤5 ppm/°C drift - eliminates need for external reference in cost-sensitive precision designs. |
| Conversion Rate | 60 conversions per second - supports real-time monitoring of slow-varying physical parameters (e.g., temperature, pressure). |
| Supply Current | 1.5 mA (active), 2 µA (sleep max), 200 nA (deep sleep) - enables battery-powered or energy-harvested sensing nodes. |
| Offset Error | 2 LSB max - ensures <0.03% of full scale absolute error at room temperature before calibration. |
| Gain Error | ±0.01% of full scale - provides direct compatibility with 12-bit system accuracy requirements without post-processing scaling. |
Pinout & Package
Package: 12-lead (3 mm × 3 mm) plastic DFN with exposed pad (Pin 13), rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFOUT (1) | Reference output | Nominally 1.25 V; sets ADC full-scale range and must be decoupled with ≤0.1 µF capacitor to GND. |
| COMP (2) | Reference compensation | Requires 0.1 µF capacitor to GND for stability; value must be ≥ REFOUT capacitor to prevent oscillation. |
| 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 | Accepts 4-bit control word (EN1/EN2/SPD/SLP); tied to GND/VCC for fixed-mode configuration. |
| SCK (5) | Serial clock input | Supports up to 2 MHz; controls bit timing for both data input and output; idle-high or idle-low compatible. |
| SDO (6) | Serial data output | 3-state output delivering MSB-first 16-bit result; indicates conversion status when SCK = HIGH and CS = LOW. |
| GND (7, 11) | Analog/digital ground | Low-impedance connection required; pins 7 and 11 are internally connected and must tie to same ground plane. |
| REF– (8) | Negative reference input | Sets zero-input point; typically connected to sensor ground or remote sense point to reject common-mode noise. |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF above REF–; supports 8 LSB overrange below GND for cold-junction compensation. |
| IN– (10) | Differential negative input | Accepts voltage up to VREF below REF–; enables true differential measurement with common-mode rejection. |
| VCC (12) | Positive supply | 2.7 V to 5.5 V; requires 10 µF + 0.1 µF parallel bypassing close to pin for stable reference and low-noise operation. |
| Exposed Pad (13) | Thermal ground | Internally connected to GND; must be soldered to PCB ground plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency serial output | Each 16-bit result corresponds exactly to the last completed conversion-no filter delay or redundant samples. |
| Auto-calibrating architecture | Continuous internal offset and full-scale correction ensures long-term accuracy without interrupting conversion flow. |
| Ultra-low input sampling current | 50 nA average - allows direct interfacing with high-impedance sources (e.g., RTDs, thermistors) without buffer amplifiers. |
| Single-cycle operation with auto shutdown | Enters NAP mode immediately after conversion; optional SLEEP mode reduces current to 200 nA with 12 ms reference wake-up. |
| Relaxed anti-aliasing requirements | Oversampling ratio >1000:1 permits simple RC filters (e.g., 1 kΩ + 0.1 µF) with <1 LSB error contribution. |
Applications
| Industrial Process Monitoring | Environmental Sensor Nodes |
|---|---|
|
Use Scenario: Continuous logging of pressure, flow, and level signals from 4–20 mA transmitters and strain-gauge bridges in factory automation. IC Role / Device Role / Timing Role: Differential ADC digitizing ratiometric bridge outputs with built-in reference, rejecting supply and common-mode noise. Use Value: Eliminates external reference and calibration circuitry while maintaining 16-bit linearity across –40°C to +85°C ambient. |
Use Scenario: Low-power wireless air quality monitors measuring CO₂, humidity, and particulate matter using analog-output sensors. IC Role / Device Role / Timing Role: Precision digitizer for microamp-level sensor outputs, synchronized to MCU's SPI bus with minimal firmware overhead. Use Value: 2 µA sleep current extends battery life to multi-year operation; internal oscillator removes timing component count. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
|
Use Scenario: Cold-junction compensation and thermocouple linearization in portable test equipment and HVAC controllers. IC Role / Device Role / Timing Role: Differential front-end accepting thermocouple voltage referenced to local sensor junction, with overrange capability below GND. Use Value: 8 LSB underrange support enables accurate sub-zero measurements without external level shifters or bias networks. |
Use Scenario: Retrofitting legacy 12-bit systems requiring improved resolution and stability without board redesign. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for earlier 12-bit ADCs, providing 16-bit output via identical SPI protocol. Use Value: Maintains existing firmware and layout while delivering 4× higher effective resolution and guaranteed no-missing-codes performance. |
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 | 4-channel, programmable gain amplifier (PGA), I²C interface, 16-bit resolution, 860 SPS max, 150 µA active current. | Requires external reference; lacks integrated reference and differential input flexibility; better suited for multi-channel multiplexed sensing. | Select ADS1115IDGSR when multi-input channel count and PGA flexibility outweigh need for ultra-low sleep current and self-contained reference. |
| MAX11200ETA+ | Single-ended input only, 20-bit resolution, 10 SPS max, 250 µA active current, 5 ppm/°C reference, SPI interface. | Higher resolution but slower speed; no differential input; larger 10-lead µMAX package; optimized for ultra-low-noise static measurements. | Select MAX11200ETA+ when ultimate DC accuracy and noise floor are prioritized over conversion rate and differential signal handling. |
Compared with ADS1115IDGSR and MAX11200ETA+, the LTC2462IDD#TRPBF uniquely combines differential input architecture, integrated 1.25V reference with ≤5 ppm/°C drift, 60 SPS throughput, and 200 nA deep-sleep current in a 3 mm × 3 mm DFN-making it optimal for compact, battery-aware industrial sensor interfaces requiring bipolar signal fidelity.
Availability
LTC2462IDD#TRPBF is available at Aetrix Electronics and suitable for industrial process control, environmental monitoring, and embedded temperature measurement requiring stable component supply across extended temperature ranges.
Supply support for LTC2462IDD#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC2462IDD#TRPBF belongs to ADI's legacy Linear Technology precision ADC product line, designed specifically for space-constrained, low-power applications demanding high DC accuracy, integrated references, and simplified system-level design.
FAQ
What is the operating temperature range of the LTC2462IDD#TRPBF?
The LTC2462IDD#TRPBF is specified for operation from –40°C to +85°C. This I-grade rating is confirmed by the "IDD" suffix in the part number and validated in the Absolute Maximum Ratings table of the official datasheet. It ensures reliable performance in industrial environments where ambient temperatures exceed commercial-grade limits.
Does the LTC2462IDD#TRPBF require an external crystal or oscillator?
No, the LTC2462IDD#TRPBF does not require an external crystal or oscillator. It integrates a precision internal oscillator that drives the delta-sigma modulator and timing circuits, eliminating external timing components and reducing bill-of-materials cost and PCB area.
How does the LTC2462IDD#TRPBF handle input signals below ground?
The LTC2462IDD#TRPBF supports up to 8 LSB of underrange on IN+ relative to REF–, enabling accurate digitization of signals slightly below ground-such as thermocouple outputs in cold-junction compensation. This capability is inherent to its differential architecture and is verified in Figure 3 and Applications Information section of the datasheet.
What is the reference voltage specification for the LTC2462IDD#TRPBF?
The LTC2462IDD#TRPBF provides a 1.25 V nominal reference output (REFOUT) with initial accuracy of ±0.1% (1.247 V to 1.253 V) and temperature coefficient of ≤5 ppm/°C over the –40°C to +85°C range. This is explicitly stated in the Electrical Characteristics table under "VREF" and "Reference Voltage Coefficient" parameters.
Can the LTC2462IDD#TRPBF be used in single-ended mode?
No, the LTC2462IDD#TRPBF is exclusively a differential-input ADC. Its pinout (IN+, IN–) and functional description confirm it accepts differential voltage (VIN+ – VIN–) within ±VREF. For single-ended operation, the pin-compatible LTC2460 series (e.g., LTC2460IDD#TRPBF) must be selected instead.
LTC2462IDD#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:
- 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-DFN (3x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2462IDD#TRPBF FAQ
1.How can I place an order for LTC2462IDD#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2462IDD#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 LTC2462IDD#TRPBF reliable?
The price and inventory of LTC2462IDD#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2462IDD#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2462IDD#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2462IDD#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2462IDD#TRPBF?
LTC2462IDD#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2462IDD#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 LTC2462IDD#TRPBF?
For technical support, including LTC2462IDD#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2462IDD#TRPBF requirements.
6.How does Aetrix verify that LTC2462IDD#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2462IDD#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 LTC2462IDD#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2462IDD#TRPBF?
All LTC2462IDD#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2462IDD#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 LTC2462IDD#TRPBF part is unused and in its original packaging.
Return procedure for LTC2462IDD#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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