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Analog Devices Inc. LTC2487CDE#TRPBF
- Part No.:
- LTC2487CDE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 14-WFDFN Exposed Pad
- Datasheet:
-
LTC2487CDE#TRPBF.pdf
- Description:
- IC ADC 16BIT SIGMA-DELTA 14DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,720
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Product details
Overview
LTC2487CDE#TRPBF from Analog Devices 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 instrumentation and process control systems.
For engineers reviewing the LTC2487CDE#TRPBF datasheet, LTC2487CDE#TRPBF pinout, LTC2487CDE#TRPBF application, or LTC2487CDE#TRPBF equivalent, this page provides verified technical context, validated pin functions, real-world use scenarios, and two confirmed alternative parts for design-in flexibility under 0°C to 70°C operating conditions.
Technical Context
The LTC2487CDE#TRPBF implements a 3rd-order delta-sigma modulator with decimating FIR filter and auto-calibration that runs continuously per conversion cycle-eliminating offset and full-scale drift across temperature, supply voltage, and channel switching. Its Easy Drive architecture cancels differential input current via passive sampling network, enabling rail-to-rail inputs with zero net differential current into CH0–CH3 and COM.
It supports three rejection modes (50 Hz, 60 Hz, simultaneous 50/60 Hz) using either internal oscillator (307.2 kHz nominal) or external clock on fO pin, and features a 24-bit output format containing 16-bit signed result plus status bits. The device operates in normal (15.7 Hz) or 2× speed (31.4 Hz) mode with corresponding noise and accuracy trade-offs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes-guarantees monotonicity and full-scale fidelity for calibration-critical measurements. |
| INL | 2 ppm of VREF-enables ±0.0002% linearity error over full scale, critical for high-accuracy transducer interfaces. |
| Offset Error | ±0.5 µV typical-supports sub-microvolt DC measurement stability without external trimming. |
| RMS Noise | 0.6 µV RMS (normal mode)-provides effective 19.2-bit ENOB at 15.7 sps for low-frequency sensor signals. |
| Input Common Mode Range | GND to VCC-allows direct digitization of rail-to-rail single-ended or differential signals without level-shifting circuitry. |
| Programmable Gain | 1 to 256 in 8 discrete steps-configures full-scale range from ±0.5·VREF down to ±1.95 mV for microvolt-level sensor outputs. |
| Temperature Sensor Accuracy | ±2°C absolute, 0.5°C resolution-enables on-board thermal compensation without external sensor. |
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; determines output data rate and 50/60 Hz rejection null placement. |
| CA0, CA1 (Pins 2, 3) | I²C address configuration | Three-state pins (LOW/HIGH/FLOAT) set one of nine unique I²C addresses plus global sync address. |
| SCL (Pin 4) | I²C serial clock input | Slave-only interface clock; rising edge latches SDA input, falling edge drives SDA output (open-drain). |
| SDA (Pin 5) | I²C bidirectional data line | 24-bit read/write interface: 16-bit signed conversion result + status bits; requires external pull-up to VCC. |
| GND (Pin 6) | Analog/digital ground reference | Common return for all analog and digital circuits; low-impedance PCB connection required for noise immunity. |
| COM (Pin 7) | Common negative input | Shared IN− for all single-ended channels; supports rail-to-rail common-mode voltage (GND to VCC). |
| CH0–CH3 (Pins 8–11) | Configurable analog inputs | Software-selectable as IN+ or IN− in differential pairs (CH0/CH1, CH2/CH3) or four single-ended inputs vs COM. |
| VCC (Pin 12) | Supply voltage | 2.7 V to 5.5 V operation; requires local 10 µF tantalum + 0.1 µF ceramic bypassing for stable conversion performance. |
| 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; common-mode range = GND to VCC. |
| Exposed Pad (Pin 15) | Thermal & electrical ground | Must be soldered to PCB ground plane; improves thermal dissipation and reduces ground impedance for ADC accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| No latency delta-sigma conversion | First conversion after channel change is fully settled and meets spec-no filter delay or invalid readings during multiplexing. |
| Easy Drive input current cancellation | Eliminates dynamic differential input current errors, enabling direct interface to high-impedance sensors (e.g., RTDs, thermocouples) without buffer amplifiers. |
| Integrated temperature sensor | On-die PTAT sensor with 1/2°C resolution and ±2°C absolute accuracy-used for self-compensation or system thermal monitoring. |
| Programmable 50/60 Hz rejection | Hardware-based notch filtering synchronized to line frequency via internal or external clock-no firmware overhead or DSP resources required. |
| Auto-calibration per conversion | Continuous offset and full-scale correction removes drift due to temperature, supply variation, and aging-no user intervention needed. |
Applications
| Industrial Process Monitoring | High-Impedance Sensor Digitization |
|---|---|
Use Scenario: Continuous monitoring of pressure, flow, and level transducers in PLC-based control cabinets with 50/60 Hz AC noise environments. IC Role / Device Role / Timing Role: Precision 4-channel ADC with simultaneous 50/60 Hz rejection and rail-to-rail input capability for direct analog front-end digitization. Use Value: Eliminates need for external anti-alias filters and instrumentation amplifiers, reducing BOM count and layout area while maintaining ±2 ppm linearity. |
Use Scenario: Direct digitization of thermistor, RTD, or strain gauge bridges with source impedances >100 kΩ and minimal signal conditioning. IC Role / Device Role / Timing Role: Delta-sigma ADC with Easy Drive input architecture that cancels differential input current to preserve DC accuracy. Use Value: Achieves 0.6 µV RMS noise and ±0.5 µV offset without external buffering-enabling 24-bit-equivalent resolution at 15.7 sps. |
| Embedded Temperature-Compensated DAQ | Low-Power Instrumentation Front-End |
Use Scenario: Portable data loggers measuring environmental parameters (temperature, humidity, gas concentration) with on-board thermal compensation. IC Role / Device Role / Timing Role: Dual-function ADC + integrated temperature sensor providing synchronized analog and thermal readings for real-time compensation. Use Value: Reduces component count by replacing separate temperature sensor and ADC; ±2°C sensor accuracy enables <1% error correction in NTC linearization. |
Use Scenario: Battery-powered handheld test equipment requiring high-precision measurements with ultra-low quiescent current between conversions. IC Role / Device Role / Timing Role: Low-power delta-sigma converter with 1 µA sleep mode current and automatic wake-on-I²C-access behavior. Use Value: Enables 10-year battery life in intermittent-read applications; 160 µA typical conversion current at 15.7 sps minimizes thermal self-heating effects. |
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 |
|---|---|---|---|
| ADS114S08IPBS | 24-bit resolution, SPI interface, no integrated temp sensor, 1.8–3.6 V supply only | Requires external temperature sensing and level-shifting for 5 V systems; better resolution but higher power (350 µA active) | Choose for higher-resolution, SPI-based designs where 5 V operation and on-chip temperature sensing are not required. |
| MAX11206ETL+ | 24-bit resolution, I²C interface, 2.7–3.6 V supply, no PGA or temp sensor | Lacks programmable gain and on-die temperature sensor; requires external signal conditioning for microvolt-level inputs | Choose when ultra-low noise (150 nV RMS) is prioritized over gain flexibility and thermal self-compensation. |
Compared with ADS114S08IPBS and MAX11206ETL+, the LTC2487CDE#TRPBF uniquely integrates PGA, Easy Drive input cancellation, and a calibrated temperature sensor in a 4 mm × 3 mm DFN-making it optimal for compact, self-compensating, 5 V-compatible industrial sensor nodes where design simplicity and guaranteed 16-bit accuracy are essential.
Availability
LTC2487CDE#TRPBF is available at Aetrix Electronics and suitable for industrial process control, portable instrumentation, and embedded temperature-compensated data acquisition systems requiring stable component supply across extended production lifecycles.
Supply support for LTC2487CDE#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 (now part of Analog Devices, Inc. following merger with Linear Technology) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors.
The LTC2487 belongs to Linear's precision delta-sigma ADC product line, designed specifically for high-accuracy, low-power, multi-channel sensor digitization in harsh industrial and instrumentation environments.
FAQ
What is the operating temperature range for the LTC2487CDE#TRPBF?
The LTC2487CDE#TRPBF is rated for 0°C to 70°C ambient operation, as indicated by the "C" grade suffix. This commercial-grade specification ensures guaranteed performance-including 2 ppm INL, 0.6 µV RMS noise, and ±0.5 µV offset error-across the full range without derating. It is distinct from the industrial-grade LTC2487IDE#TRPBF (–40°C to 85°C).
Does the LTC2487CDE#TRPBF require external components for basic operation?
Yes-the LTC2487CDE#TRPBF requires a 10 µF tantalum capacitor and 0.1 µF ceramic capacitor from VCC to GND, placed as close as possible to Pins 12 and 6. Pull-up resistors on SDA and SCL lines are also mandatory for I²C communication. No external op amps or anti-alias filters are needed due to its Easy Drive input architecture and integrated digital filtering.
How does the Easy Drive technology in the LTC2487CDE#TRPBF improve measurement accuracy?
Easy Drive eliminates differential input current errors through a patented passive sampling network that auto-cancels current drawn from IN+ and IN− terminals. This allows high-impedance sensors (e.g., thermistors >1 MΩ) to connect directly without buffer amplifiers-preserving DC accuracy, enabling rail-to-rail input swings, and removing gain/offset errors caused by source impedance mismatch in the LTC2487CDE#TRPBF.
Can the LTC2487CDE#TRPBF measure its own die temperature?
Yes-the LTC2487CDE#TRPBF integrates a factory-calibrated PTAT temperature sensor with ±2°C absolute accuracy and 0.5°C resolution. It can be selected as an input channel via I²C command, delivering a 16-bit signed reading proportional to junction temperature. This feature enables real-time thermal compensation of sensor readings without adding external components to the LTC2487CDE#TRPBF design.
What I²C addresses are supported by the LTC2487CDE#TRPBF?
The LTC2487CDE#TRPBF supports nine unique I²C addresses determined by the logic states of CA0 and CA1 pins (LOW/HIGH/FLOAT), plus one global address (0x00) for synchronized write operations across multiple devices. Address configuration is hardware-based and non-volatile-no register programming is required to set the LTC2487CDE#TRPBF I²C identity.
LTC2487CDE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 14-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC2487CDE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC2487CDE#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 LTC2487CDE#TRPBF reliable?
The price and inventory of LTC2487CDE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC2487CDE#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC2487CDE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC2487CDE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC2487CDE#TRPBF?
LTC2487CDE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC2487CDE#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 LTC2487CDE#TRPBF?
For technical support, including LTC2487CDE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC2487CDE#TRPBF requirements.
6.How does Aetrix verify that LTC2487CDE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC2487CDE#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 LTC2487CDE#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC2487CDE#TRPBF?
All LTC2487CDE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC2487CDE#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 LTC2487CDE#TRPBF part is unused and in its original packaging.
Return procedure for LTC2487CDE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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