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Analog Devices Inc. LTC2487CDE#PBF
- Part No.:
- LTC2487CDE#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC2487CDE#PBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:140
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Product details
Overview
LTC2487CDE#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 4-channel (2 differential) delta-sigma ADC with integrated PGA, Easy Drive input current cancellation, I²C interface, and on-chip temperature sensor. It delivers 2 ppm INL, 600 nV RMS noise, and programmable gain (1–256) for precision sensor digitization in industrial process control and instrumentation systems.
For engineers reviewing the LTC2487CDE#PBF datasheet, LTC2487CDE#PBF pinout, LTC2487CDE#PBF application, or LTC2487CDE#PBF equivalent, key selection criteria include rail-to-rail common-mode input range (GND to VCC), simultaneous 50/60 Hz rejection, no-latency conversion settling, and integrated temperature sensing with ±2°C absolute accuracy.
Technical Context
The LTC2487CDE#PBF employs a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration per conversion cycle. Its Easy Drive architecture cancels differential input current via passive sampling network, enabling direct connection of high-impedance sensors without external buffering.
It supports dual-speed operation (1× and 2× modes), programmable 50 Hz / 60 Hz / simultaneous 50+60 Hz rejection, and configurable I²C address via CA0/CA1 pins. The internal oscillator runs at 307.2 kHz (fO = GND), and conversion time is 131–164 ms (1× mode) or 66–82 ms (2× mode) depending on rejection setting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full-scale linearity across all operating conditions. |
| INL | 2 ppm of VREF - enables sub-μV-level DC measurement fidelity in precision instrumentation. |
| Output Noise | 600 nV RMS - supports high-resolution digitization of low-level sensor outputs (e.g., strain gauges, thermocouples). |
| Offset Error | ±0.5 µV typical - eliminates need for system-level offset trimming in calibrated measurement paths. |
| Gain Range | Programmable 1× to 256× in 8 steps - allows single device to interface with mV- to V-range sensors without external amplifiers. |
| Temp Sensor Accuracy | ±2°C absolute, 0.5°C resolution - provides reliable on-chip thermal monitoring without external components. |
| Common-Mode Range | GND to VCC independent of reference - permits rail-to-rail analog inputs even with sub-VCC references (e.g., 2.5V ref on 5V supply). |
Pinout & Package
Package: 14-lead (4 mm × 3 mm) plastic DFN with exposed pad (Pin 15 = GND, must be soldered).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| fO (Pin 1) | Frequency control input | Selects internal oscillator (GND) or external clock source to configure output data rate and filter nulls. |
| CA0, CA1 (Pins 2, 3) | I²C address configuration | Three-state (LOW/HIGH/FLOAT) pins set one of nine I²C addresses plus global sync address. |
| SCL (Pin 4) | I²C serial clock input | Slave-only interface; rising edge samples SDA input, falling edge drives SDA output. |
| SDA (Pin 5) | I²C bidirectional data line | Open-drain output during read; high-impedance input during write - requires external pull-up. |
| GND (Pin 6) | Analog/digital ground reference | Low-impedance return path for all analog and digital currents; connects to exposed pad. |
| COM (Pin 7) | Common negative input | Shared IN– for all single-ended channels; supports rail-to-rail input voltage (GND – 0.3V to VCC + 0.3V). |
| CH0–CH3 (Pins 8–11) | Analog input channels | Configurable as 4 single-ended or 2 differential inputs; each pair (e.g., CH0/CH1) forms a differential channel. |
| VCC (Pin 12) | Positive supply | 2.7 V to 5.5 V operation; requires local 10 µF tantalum + 0.1 µF ceramic bypassing. |
| REF+, REF– (Pins 13, 14) | Differential reference inputs | Set full-scale range (±0.5·VREF/Gain); VREF = REF+ – REF– must be ≥0.1 V and ≤VCC. |
| Exposed Pad (Pin 15) | Thermal & electrical ground | Must be soldered to PCB ground plane for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| No-latency conversion | Digital filter settles in one cycle after channel change - first result is fully accurate, eliminating multiplexing delay uncertainty. |
| Easy Drive input current cancellation | Automatic differential input current nulling enables direct digitization of high-impedance sources (e.g., RTDs, pH electrodes) without external op-amps. |
| Integrated temperature sensor | On-die PTAT sensor with 93.5 µV/°C coefficient and factory-trimmed 27.8–28.2 mV at 27°C - usable for system thermal compensation. |
| Simultaneous 50/60 Hz rejection | Single-conversion rejection of both line frequencies without switching modes - critical for global industrial deployments with variable AC mains. |
| Auto-calibration per conversion | Continuous offset and full-scale correction removes drift due to temperature, supply variation, and channel switching - maintains 15 ppm full-scale error over life. |
Applications
| Direct Sensor Digitizer | Industrial Process Control |
|---|---|
Use Scenario: Digitizing millivolt-level outputs from load cells, thermocouples, or bridge-based pressure sensors in factory-floor PLC modules. IC Role / Device Role / Timing Role: Precision front-end ADC with integrated PGA and Easy Drive - acquires raw sensor signals without signal conditioning circuitry. Use Value: Eliminates external instrumentation amplifiers and anti-alias filters, reducing BOM count and layout area while maintaining 16-bit DC accuracy. | Use Scenario: Monitoring temperature, flow, and level in chemical processing skids where EMI and line-frequency interference are prevalent. IC Role / Device Role / Timing Role: Dual-mode ADC providing simultaneous 50 Hz and 60 Hz rejection - ensures stable readings regardless of regional AC power standard. Use Value: Prevents measurement corruption from 50/60 Hz harmonics in noisy plant environments, improving control loop stability. |
| Instrumentation | Data Acquisition System with Temperature Compensation |
Use Scenario: Portable handheld multimeters and calibration standards requiring high DC accuracy and low power consumption. IC Role / Device Role / Timing Role: Low-power 16-bit ADC with 80 µA typical current at 7.5 SPS - enables battery-operated precision measurement. Use Value: Delivers laboratory-grade INL (2 ppm) and offset (0.5 µV) in compact DFN package, supporting portable form factors. | Use Scenario: Environmental monitoring nodes measuring thermistor resistance while compensating for self-heating using on-chip temperature sensor. IC Role / Device Role / Timing Role: Dual-function device performing analog acquisition and real-time thermal correction - reads sensor channel then immediately measures die temperature. Use Value: Enables closed-loop thermal compensation within single IC, avoiding timing skew and calibration mismatch between separate ADC and temp sensor. |
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 |
|---|---|---|---|
| ADS114S08IPWR | 16-bit, 4-channel, SPI interface; no integrated temp sensor; 1.2 mW typical power vs. 0.8 mW for LTC2487CDE#PBF. | Requires external temperature sensing for thermal compensation; better suited for SPI-based microcontroller systems. | Choose when SPI interface is preferred and thermal compensation is handled externally. |
| MAX11206ETL+ | 16-bit, 2-channel, I²C interface; no programmable gain; 1.5 µV offset vs. 0.5 µV; no simultaneous 50/60 Hz rejection. | Limited to two analog inputs; lacks Easy Drive - requires external buffers for high-Z sensors. | Choose for simpler dual-channel systems where gain flexibility and ultra-low offset are not required. |
Compared with ADS114S08IPWR and MAX11206ETL+, the LTC2487CDE#PBF uniquely integrates rail-to-rail Easy Drive inputs, on-chip temperature sensing, and simultaneous 50/60 Hz rejection - making it optimal for compact, self-compensating, globally deployable sensor nodes.
Availability
LTC2487CDE#PBF is available at Aetrix Electronics and suitable for industrial process control, precision instrumentation, and sensor digitization applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC2487CDE#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC2487CDE#PBF belongs to ADI's precision delta-sigma ADC product line, designed specifically for high-accuracy, low-power, multi-channel sensor interfacing in space- and cost-constrained industrial systems.
FAQ
What is the operating temperature range of the LTC2487CDE#PBF?
The LTC2487CDE#PBF is specified for commercial temperature range: 0°C to 70°C. This is indicated by the "C" grade suffix in the part number. For extended industrial operation (–40°C to 85°C), the LTC2487IDE#PBF variant is available. Both share identical electrical specifications and pinout.
Does the LTC2487CDE#PBF require external components for basic operation?
Yes - the LTC2487CDE#PBF requires a 10 µF tantalum capacitor and 0.1 µF ceramic capacitor from VCC to GND, plus pull-up resistors on SDA/SCL lines for I²C communication. No external op-amps or anti-alias filters are needed due to Easy Drive and integrated digital filtering in the LTC2487CDE#PBF.
How does the Easy Drive technology in the LTC2487CDE#PBF improve sensor interfacing?
Easy Drive in the LTC2487CDE#PBF cancels differential input current via a patented passive sampling network, allowing rail-to-rail input signals and direct connection of high-impedance sensors (e.g., >1 MΩ) without external buffering. This preserves DC accuracy and eliminates errors caused by source impedance mismatch - a key advantage over conventional buffered ADCs.
Can the LTC2487CDE#PBF measure its own die temperature?
Yes - the LTC2487CDE#PBF integrates a factory-trimmed PTAT temperature sensor with ±2°C absolute accuracy and 0.5°C resolution. It can be selected as an input channel via I²C command, enabling real-time thermal monitoring and compensation without external components.
What I²C addresses are supported by the LTC2487CDE#PBF?
The LTC2487CDE#PBF supports nine unique I²C addresses determined by CA0 and CA1 pin states (LOW/HIGH/FLOAT), plus one global address for synchronized conversions across multiple devices. Address configuration is hardware-based and non-volatile - no register writes are needed to set the address.
LTC2487CDE#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 15
- Number of Inputs:
- 2, 4
- Input Type:
- Differential, Single Ended
- Data Interface:
- I2C
- Configuration:
- MUX-ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Sigma-Delta
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 5.5V
- Voltage - Supply, Digital:
- 2.7V ~ 5.5V
- Features:
- PGA, Selectable Address, Temperature Sensor
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 14-DFN (4x3)
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC2487CDE#PBF FAQ
1.How can I place an order for LTC2487CDE#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2487CDE#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 LTC2487CDE#PBF reliable?
The price and inventory of LTC2487CDE#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2487CDE#PBF is usually 5 days.
3.What payment methods are accepted for LTC2487CDE#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2487CDE#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2487CDE#PBF?
LTC2487CDE#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2487CDE#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 LTC2487CDE#PBF?
For technical support, including LTC2487CDE#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2487CDE#PBF requirements.
6.How does Aetrix verify that LTC2487CDE#PBF is sourced from the original manufacturer or authorized distributors?
All LTC2487CDE#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 LTC2487CDE#PBF meets industry standards.
7.What is the process for return or replacement of LTC2487CDE#PBF?
All LTC2487CDE#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2487CDE#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 LTC2487CDE#PBF part is unused and in its original packaging.
Return procedure for LTC2487CDE#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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