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Analog Devices Inc. LTC2462IDD#PBF
- Part No.:
- LTC2462IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
LTC2462IDD#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,331
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Product details
Overview
LTC2462IDD#PBF from Analog Devices (formerly Linear Technology) is a 16-bit delta-sigma ADC with integrated 1.25V precision reference, differential input architecture (±VREF range), and SPI interface. It operates from 2.7V to 5.5V, delivers 60 conversions per second, achieves ±2 LSB offset error and ±0.01% gain error, and targets low-power industrial sensor signal conditioning in temperature- or environment-critical systems.
For engineers reviewing the LTC2462IDD#PBF datasheet, LTC2462IDD#PBF pinout, LTC2462IDD#PBF application, or LTC2462IDD#PBF equivalent, key selection considerations include its guaranteed no-missing-codes resolution, internal reference drift ≤5 ppm/°C (I-grade), 200 nA sleep current, single-cycle conversion settling for multiplexed inputs, and compatibility with 3mm × 3mm DFN packaging for space-constrained designs.
Technical Context
The LTC2462IDD#PBF implements a proprietary delta-sigma architecture with continuous internal offset and full-scale calibration-transparent to the user and effective across –40°C to +85°C. Its integrated oscillator eliminates external timing components, and its input sampling scheme reduces average input current to 50 nA, enabling direct RC filter interfacing without significant error.
Operation follows a deterministic three-state cycle: CONVERT (16.6 ms typical), SLEEP/NAP (ADC-only or ADC+reference shutdown), and DATA INPUT/OUTPUT (16-bit SPI readout). The device supports CPOL = 0 or 1 SPI modes, provides sign-bit-first output, and allows conversion status monitoring via CS/SDO handshake during SCK-high idle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonicity and full dynamic range utilization. |
| Reference Voltage | 1.25 V ±3 mV (1.247–1.253 V), with ≤5 ppm/°C drift over –40°C to +85°C-enables stable full-scale scaling without external reference. |
| Input Type | Differential (IN+, IN–), ±VREF input range (±1.25 V)-rejects common-mode noise and supports bipolar transducer interfaces. |
| Conversion Rate | 60 conversions per second-supports real-time monitoring of slow-varying physical parameters (e.g., temperature, pressure). |
| Supply Current | 1.5 mA (conversion), 800 µA (nap), 200 nA (sleep)-enables battery-powered or energy-harvesting applications with duty-cycled acquisition. |
| Offset Error | ±2 LSB maximum-translates to <±76 µV error at 1.25 V reference, sufficient for 12-bit-equivalent system accuracy without trimming. |
| Gain Error | ±0.01% of full scale-limits end-to-end measurement error to <±1.25 mV, critical for calibrated sensor front-ends. |
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 reference source; requires 0.1 µF bypass to GND; must not be overdriven externally. |
| COMP (2) | Reference compensation | Stabilizes internal reference; connect 0.1 µF capacitor to GND-value must be ≥ CREFOUT. |
| 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); tied to GND/VCC for simplified configuration. |
| SCK (5) | Serial clock input | Controls SPI timing; supports CPOL = 0 or 1; falling edge clocks out SDO data. |
| SDO (6) | Serial data output | 3-state output delivering MSB-first 16-bit result; indicates conversion status when CS pulled LOW during SCK HIGH. |
| GND (7, 11) | Ground | Low-impedance ground connection points; exposed pad (13) must also connect to PCB ground plane. |
| REF– (8) | Negative reference input | Sets zero-input level; typically tied to system ground or remote sensor ground sense point. |
| IN+ (9) | Differential positive input | Accepts voltage up to VREF; supports overrange sampling up to +8 LSB beyond VREF. |
| IN– (10) | Differential negative input | Accepts voltage down to 0 V; supports underrange sampling down to –8 LSB below GND. |
| VCC (12) | Positive supply | 2.7 V to 5.5 V operation; requires 10 µF + 0.1 µF parallel bypassing at pin. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency serial output | 16-bit result corresponds exactly to last completed conversion-no filter delay or redundant reads required for multiplexed sensors. |
| Auto-calibrating architecture | Continuous internal offset and full-scale correction ensures long-term accuracy without user intervention or system recalibration cycles. |
| Ultra-low input current | Average 50 nA sampling current enables direct use of simple RC anti-aliasing filters (e.g., 1 kΩ + 0.1 µF) with <1 LSB added error. |
| Configurable power states | Three distinct low-power modes: active conversion (1.5 mA), nap (800 µA), and deep sleep (200 nA)-optimizable per acquisition duty cycle. |
| Single-cycle settling | Full conversion completes in one fixed interval (16.6 ms typ.), eliminating need for variable settling delays in time-triggered systems. |
Applications
| Industrial Process Monitoring | Environmental Sensor Interface |
|---|---|
Use Scenario: Continuous logging of pressure, flow, or level transducers in factory automation PLCs. IC Role / Device Role / Timing Role: Differential ADC digitizing ratiometric bridge outputs with rejection of supply-induced common-mode noise. Use Value: 16-bit resolution and ±2 LSB offset error enable sub-0.1% FS measurement fidelity without external amplification or trimming. |
Use Scenario: Battery-powered air quality node measuring thermistor, humidity, and CO₂ analog outputs. IC Role / Device Role / Timing Role: Low-power signal conditioner acquiring multiple sensors sequentially using internal reference stability. Use Value: 200 nA sleep current and auto-shutdown reduce average system power to µA-range, extending 10-year battery life. |
| Direct Temperature Measurement | Embedded ADC Upgrade |
Use Scenario: Precision cold-junction compensation in thermocouple-based temperature controllers. IC Role / Device Role / Timing Role: Digitizing microvolt-level thermocouple differentials against stable 1.25 V reference with 5 ppm/°C drift. Use Value: Integrated reference eliminates external reference IC and matching thermal path design, reducing BOM and layout complexity. |
Use Scenario: Retrofitting legacy 12-bit SAR ADCs in medical or test equipment to improve dynamic range. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement offering 16-bit resolution, no missing codes, and SPI compatibility. Use Value: No firmware changes needed-same SPI timing and register mapping as predecessor; gains 16× quantization resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar delta-sigma ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS1115IDGSR | 16-bit, I²C interface, no integrated reference (requires external 2.048 V ref), 860 µA active current | Requires external reference and level-shifting for 5 V systems; lacks differential input flexibility of LTC2462 | Prefer when I²C bus availability and lower pin count outweigh need for integrated reference and ultra-low sleep current |
| MAX11200EUB+ | 24-bit, SPI interface, integrated 2.048 V reference (3 ppm/°C), 380 µA active current, 5 µA sleep | Higher resolution but larger package (10-pin µMAX); reference voltage incompatible with LTC2462's 1.25 V scaling | Choose when 24-bit resolution and tighter reference drift are mandatory, and board space permits larger footprint |
Compared with ADS1115IDGSR and MAX11200EUB+, the LTC2462IDD#PBF uniquely combines integrated 1.25 V reference, differential ±1.25 V input, 200 nA sleep current, and 3 mm × 3 mm DFN packaging-making it optimal for compact, battery-aware industrial sensor nodes requiring minimal external components.
Availability
LTC2462IDD#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, environmental sensor interface, and direct temperature measurement requiring stable component supply across extended temperature ranges.
Supply support for LTC2462IDD#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.
The LTC2462 belongs to Linear's ultra-low-power precision delta-sigma ADC family, designed specifically for space- and power-constrained industrial and instrumentation applications demanding integrated references and guaranteed no-missing-codes performance.
FAQ
What is the operating temperature range of the LTC2462IDD#PBF?
The LTC2462IDD#PBF is specified for –40°C to +85°C operation (I-grade). This rating is confirmed by the "IDD" suffix in the part number and validated in the Absolute Maximum Ratings table of the official datasheet. The device maintains full electrical performance-including 16-bit resolution, ±2 LSB offset error, and ≤5 ppm/°C reference drift-across this entire range.
Does the LTC2462IDD#PBF require an external crystal or oscillator?
No, the LTC2462IDD#PBF does not require an external crystal or oscillator. It integrates a precision internal oscillator that drives the delta-sigma modulator and digital filter-eliminating all external timing components. This is explicitly stated in the Features list and verified in the Applications Information section, where Figure 1's block diagram labels "INTERNAL OSCILLATOR" as a core functional block.
How does the LTC2462IDD#PBF handle input overrange and underrange conditions?
The LTC2462IDD#PBF clamps output codes at 0 (all zeros) for differential inputs ≤ –VREF and at 65535 (all ones) for inputs ≥ +VREF. Crucially, it also supports limited overrange sampling: up to +8 LSB above VREF and –8 LSB below GND on IN+ or IN– individually, as documented in Figure 3 and the Input Voltage Range section. This enables robust detection of transient faults or sensor saturation.
Can the LTC2462IDD#PBF operate with a 3.3 V supply?
Yes, the LTC2462IDD#PBF fully supports 3.3 V operation. Its supply voltage range is 2.7 V to 5.5 V, and all key specifications-including 1.25 V reference output, 16-bit resolution, and 60 sps conversion rate-are guaranteed across this range. Electrical Characteristics tables confirm performance at VCC = 2.7 V, 4.1 V, and 5.5 V, validating robustness at 3.3 V.
What is the purpose of the COMP pin on the LTC2462IDD#PBF?
The COMP pin on the LTC2462IDD#PBF is the internal reference compensation terminal. It must be connected to a 0.1 µF capacitor to ground to stabilize the 1.25 V reference and minimize noise-this value must be ≥ the capacitance placed on REFOUT. The datasheet explicitly states that violating this requirement compromises reference stability and increases output noise, making proper COMP pin decoupling essential for achieving specified 30 nV/√Hz noise density.
LTC2462IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LTC2462IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2462IDD#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 LTC2462IDD#PBF reliable?
The price and inventory of LTC2462IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2462IDD#PBF is usually 5 days.
3.What payment methods are accepted for LTC2462IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2462IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2462IDD#PBF?
LTC2462IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2462IDD#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 LTC2462IDD#PBF?
For technical support, including LTC2462IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2462IDD#PBF requirements.
6.How does Aetrix verify that LTC2462IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2462IDD#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 LTC2462IDD#PBF meets industry standards.
7.What is the process for return or replacement of LTC2462IDD#PBF?
All LTC2462IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2462IDD#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 LTC2462IDD#PBF part is unused and in its original packaging.
Return procedure for LTC2462IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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