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Analog Devices Inc. LTC1860IS8#TRPBF
- Part No.:
- LTC1860IS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1860IS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,426
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Product details
Overview
LTC1860IS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, single-channel, successive-approximation ADC with true differential analog input, operating on a single 5V supply at up to 250ksps sampling rate. It features auto-shutdown (1nA typical sleep current), SPI/MICROWIRE-compatible 3-wire serial interface, and adjustable reference input. It is used in low-power portable instrumentation requiring high-resolution signal acquisition with minimal board space.
For engineers reviewing the LTC1860IS8#TRPBF datasheet, LTC1860IS8#TRPBF pinout, LTC1860IS8#TRPBF application, or LTC1860IS8#TRPBF equivalent, key selection criteria include its SO-8 package, –40°C to +85°C industrial temperature range, differential input architecture, 72dB SNR, and compatibility with external references down to 1V full-scale.
Technical Context
The LTC1860IS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage rejects common-mode noise, and conversion is initiated by a rising edge on CONV, with result output via SDO synchronized to SCK falling edges.
It operates exclusively in unipolar differential mode (IN+ − IN−), supports external reference voltages from 1V to VCC, and achieves full linear bandwidth of 125kHz at ≥68dB SINAD. The SO-8 variant ties VREF internally to VCC, fixing full-scale span to VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-fidelity analog measurement |
| Max Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz Nyquist bandwidth |
| Supply Current (250ksps) | 850µA typical - allows battery operation in compact instrumentation without thermal derating |
| Sleep Current | 1nA typical - minimizes quiescent power between conversions in duty-cycled systems |
| INL Error | ±1 LSB - ensures monotonicity and accurate end-point linearity across full scale |
| SNR | 72 dB - supports >11.6 effective number of bits (ENOB) for precision sensor interfacing |
| Full Power Bandwidth | 20 MHz - permits faithful digitization of fast transients without slew-induced distortion |
Pinout & Package
Package: 8-Lead Plastic Small Outline (SO-8, Narrow, 0.150-inch width), RoHS-compliant, tape-and-reel (TRPBF).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Tied internally to VCC in SO-8 package; defines full-scale span as VCC (no external reference required) |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input accepting 0V to VCC range; sampled simultaneously with IN− for CMRR |
| IN− (Pin 3) | Differential Analog Input (−) | High-impedance input accepting 0V to VCC/2 range; enables true differential measurement |
| GND (Pin 4) | Analog Ground | Single-point connection point for analog return path; must tie directly to analog ground plane |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; held high after completion to enter 1nA sleep mode |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI-compatible output; 12-bit result shifted out MSB-first on SCK falling edges |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports up to 20MHz clock (H-grade) for fast readout |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1µF tantalum bypass to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise up to 125kHz bandwidth while enabling rail-to-rail input utilization |
| Auto-Power-Down Between Conversions | Reduces average supply current to ~1nA during idle periods, critical for battery longevity |
| SO-8 Pinout Compatibility with LTC1864/LTC1865 | Enables drop-in upgrade path to 16-bit resolution without PCB layout changes |
| Guaranteed Operation to +85°C | Validated performance across industrial temperature range without derating or calibration drift |
| High Impedance Analog Inputs | Eliminates need for external buffer amplifiers when driving from low-impedance sources (<200Ω) |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Battery-powered environmental monitoring units acquiring temperature, pressure, and humidity over extended field deployments. IC Role / Device Role / Timing Role: Primary 12-bit analog front-end ADC performing differential sensor voltage digitization at 10–100ksps rates. Use Value: 850µA active current and 1nA sleep current extend battery life to multi-year operation; SO-8 footprint minimizes PCB area. |
Use Scenario: DIN-rail mounted PLC analog input modules measuring 4–20mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: High-accuracy, isolated analog-to-digital converter interfacing with precision op-amp signal conditioning stages. Use Value: ±1 LSB INL and 72dB SNR ensure <0.025% measurement accuracy; differential inputs suppress EMI in noisy factory environments. |
| Medical Vital Sign Monitors | Isolated Remote Data Acquisition |
Use Scenario: Compact wearable ECG/PPG devices requiring low-noise, low-power biopotential signal digitization. IC Role / Device Role / Timing Role: Front-end ADC capturing differential electrode signals with high CMRR and minimal self-heating. Use Value: True differential input rejects motion artifact and 50/60Hz interference; 125kHz full linear bandwidth preserves pulse waveform fidelity. |
Use Scenario: Distributed sensor networks using opto-isolated or transformer-coupled links to acquire analog signals from hazardous zones. IC Role / Device Role / Timing Role: Isolated-side ADC converting sensor outputs before serial transmission across barrier. Use Value: Single-supply 5V operation simplifies isolated DC-DC design; 3-wire interface reduces isolation channel count vs parallel bus. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864CS8#TRPBF | 16-bit resolution, same SO-8 package and pinout, 250ksps, 4.25mW power | Higher resolution required for precision metrology; higher power and cost | Select when ENOB >11.6 bits is mandatory and system can accommodate +3.4mW dissipation |
| ADS7822U | 12-bit, 200ksps, 2.7–5.25V supply, SPI interface, SO-8, 1.25mW at 200ksps | Wider supply range and lower voltage operation; slightly lower speed and SNR (70dB) | Choose for mixed-voltage systems or where 200ksps suffices and TI ecosystem integration is preferred |
Compared with LTC1860IS8#TRPBF, LTC1864CS8#TRPBF offers 4-bit higher resolution at identical speed and footprint but consumes 5× more power, while ADS7822U trades 50ksps speed and 2dB SNR for broader supply flexibility and TI support infrastructure.
Availability
LTC1860IS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and isolated remote data acquisition requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LTC1860IS8#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 acquired Linear Technology in 2017; Linear pioneered high-performance analog ICs including precision ADCs, references, and power management solutions.
The LTC1860IS8#TRPBF belongs to Linear's µPower SAR ADC product line, designed specifically for space-constrained, battery-operated systems demanding high resolution without sacrificing speed or power efficiency.
FAQ
What is the operating temperature range of the LTC1860IS8#TRPBF?
The LTC1860IS8#TRPBF is rated for industrial operation from –40°C to +85°C. This range is validated across all electrical specifications including INL, SNR, and supply current, making it suitable for deployment in harsh environments such as factory floors or outdoor instrumentation without thermal compensation.
Does the LTC1860IS8#TRPBF require an external reference voltage?
No. The LTC1860IS8#TRPBF uses the SO-8 package variant where VREF is internally tied to VCC, establishing a fixed full-scale span equal to the supply voltage (4.75V to 5.25V). No external reference component is needed, simplifying BOM and layout.
Can the LTC1860IS8#TRPBF interface directly with a microcontroller GPIO without level-shifting?
Yes. The LTC1860IS8#TRPBF digital I/O (CONV, SCK, SDO) is fully 5V-tolerant and compatible with standard 5V microcontrollers. VIH = 2.4V min and VOL = 0.4V max ensure robust logic-level interoperability without external level shifters.
How does the auto-shutdown feature of the LTC1860IS8#TRPBF reduce system power consumption?
The LTC1860IS8#TRPBF automatically enters a 1nA sleep state when CONV remains high after conversion completes. In a 1ksps sampling system, this reduces average supply current from 850µA to ~2µA - cutting power by >99% during idle intervals, which is critical for multi-year battery life.
Is the LTC1860IS8#TRPBF pin-compatible with any higher-resolution alternatives?
Yes. The LTC1860IS8#TRPBF shares identical SO-8 pinout and footprint with the 16-bit LTC1864CS8#TRPBF. This allows direct PCB replacement to upgrade resolution without layout changes - provided system firmware and power delivery accommodate the higher 4.25mW dissipation.
LTC1860IS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 1
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860IS8#TRPBF FAQ
1.How can I place an order for LTC1860IS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860IS8#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 LTC1860IS8#TRPBF reliable?
The price and inventory of LTC1860IS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860IS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860IS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860IS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860IS8#TRPBF?
LTC1860IS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860IS8#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 LTC1860IS8#TRPBF?
For technical support, including LTC1860IS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860IS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860IS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860IS8#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 LTC1860IS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860IS8#TRPBF?
All LTC1860IS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860IS8#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 LTC1860IS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860IS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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