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Analog Devices Inc. LTC1865LIMS#TRPBF
- Part No.:
- LTC1865LIMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865LIMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,892
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Product details
Overview
LTC1865LIMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps, 2-channel software-selectable multiplexed successive approximation ADC in an 8-lead MSOP package, operating from a single 2.7V–3.6V supply with 450µA typical supply current at full speed and auto-shutdown to 10µA at 1ksps. It features true differential or single-ended input modes, SPI/MICROWIRE-compatible 3-wire serial interface, external reference pin (1V to VCC), and high-impedance analog inputs enabling direct sensor connection in portable instrumentation.
For engineers reviewing the LTC1865LIMS#TRPBF datasheet, LTC1865LIMS#TRPBF pinout, LTC1865LIMS#TRPBF application, or LTC1865LIMS#TRPBF equivalent, this page delivers verified technical context, validated pin functions, real-world use cases for low-power data acquisition, and confirmed alternative options - all grounded in official Linear Technology documentation and package-specific characterization.
Technical Context
The LTC1865LIMS#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both differential and single-ended configurations via a 2-bit SDI configuration word. Its conversion timing is fixed at 3.7–4.66µs, synchronized by CONV rising edge and clocked by SCK up to 8MHz.
Analog input sampling occurs during the tSMPL window (14 SCK cycles), with input leakage ≤±1µA and input capacitance of 12pF in sample mode. Reference voltage range is 1V to VCC, and full-scale accuracy is maintained across –40°C to 85°C for the "I" grade (LTC1865LIMS).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = VREF/65536 quantization step for high-precision sensor digitization |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| Supply Current | 450µA typ @ 150ksps; drops to 10µA @ 1ksps - enables battery operation >1 year in intermittent-sampling systems |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% end-point linearity error over full scale |
| SNR | 82dB - supports effective resolution >13.3 bits for clean signal acquisition in noisy environments |
| Reference Range | 1V to VCC (2.7–3.6V) - allows flexible scaling from low-voltage sensors without external gain stages |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive under-hood peripheral sensing |
Pinout & Package
Package: 8-lead MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, lead coplanarity ≤0.102mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; accepts 1V–VCC; must be bypassed with ≥1µF tantalum to AGND |
| CH0 (Pin 2) | Analog Input Channel 0 | "+" or "–" terminal per MUX configuration; high-impedance, ±1µA leakage, 12pF sampling capacitance |
| CH1 (Pin 3) | Analog Input Channel 1 | "+" or "–" terminal per MUX configuration; shares same electrical specs as CH0 |
| GND (Pin 4) | Analog Ground | Single-point tie to analog ground plane; critical for INL/DNL performance and noise rejection |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; falling edge enables SDO output; high state triggers auto-shutdown |
| SDI (Pin 6) | Serial Data Input | Receives 2-bit MUX configuration on rising SCK edges after CONV↓; full-duplex interface |
| SCK (Pin 7) | Serial Clock Input | Up to 8MHz; synchronizes both SDI write and SDO read; 45% duty cycle recommended |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V; requires local 1µF bypass to GND; ripple <10mVpp avoids code errors |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Configurable differential or single-ended acquisition via 2-bit SDI command - eliminates external analog switches |
| Auto Shutdown Between Conversions | Reduces ICC from 450µA to 10µA at 1ksps - cuts average power by >97% in burst-mode systems |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pairs - enables accurate measurement in electrically noisy industrial settings |
| High-Z Analog Inputs (≤±1µA leakage) | Allows direct connection to high-output-impedance sources (e.g., thermistors, RTDs) without buffer amplifiers |
| SPI/MICROWIRE-Compatible Serial Interface | 3-wire, full-duplex, no minimum clock rate - simplifies integration with microcontrollers lacking dedicated SPI peripherals |
Applications
| Portable Instrumentation | Industrial Sensor Monitoring |
|---|---|
Use Scenario: Handheld multimeter acquiring voltage, temperature, and resistance with dual-channel simultaneous sampling. IC Role / Device Role / Timing Role: Primary 16-bit ADC performing ratiometric measurements against internal reference; CONV-triggered burst acquisition synchronized to button press. Use Value: 150ksps rate captures transients; 450µA active current and 10µA sleep enable >500hr battery life on two AA cells. | Use Scenario: DIN-rail mounted condition monitoring node measuring vibration (accelerometer) and temperature (RTD) in factory machinery. IC Role / Device Role / Timing Role: Dual-channel front-end digitizer interfacing to MEMS accelerometer and 3-wire RTD bridge; operates at –40°C to +85°C. Use Value: External 2.5V reference ensures stable full-scale across temperature; differential mode rejects 50/60Hz EMI from motor drives. |
| Isolated Data Acquisition | Battery-Powered Environmental Sensing |
Use Scenario: Isolated analog input module using digital isolators (e.g., ADuM1401) between MCU and sensor side. IC Role / Device Role / Timing Role: Isolated-side ADC driving isolated SPI bus; powered from isolated 3.3V supply; referenced to local VREF. Use Value: No minimum data transfer rate allows flexible isolation timing; low 450µA supply minimizes isolated power budget. | Use Scenario: Wireless soil moisture and ambient temperature node deployed in agriculture with 10-year target lifetime. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated by timer interrupt every 10 seconds; samples capacitive moisture sensor and thermistor. Use Value: Auto-shutdown reduces average current to <1µA; 1V min reference supports ultra-low-voltage LDOs (e.g., TPS782xx). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit, low-power, serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, SPI-only, 1.8V–3.6V supply, 500µA @ 1MSPS, no MUX, internal reference option | Higher speed but no built-in channel selection; requires external MUX for multi-channel use | Select when sampling rate >150ksps is required and external MUX is acceptable |
| LTC2311CDHC-16#TRPBF | 16-bit, 500ksps, pseudo-differential input, 2.5V–5.5V supply, 2.5mA @ 500ksps, no auto-shutdown, SO-8 | Higher power, wider supply range, no software-configurable MUX, no sleep mode | Select when higher throughput and rail-to-rail input compliance are prioritized over ultra-low power |
Compared with ADS8860IDRCT and LTC2311CDHC-16#TRPBF, the LTC1865LIMS#TRPBF uniquely combines integrated 2-channel MUX, sub-500µA active current, and auto-shutdown - making it optimal for space-constrained, battery-sensitive, multi-sensor systems where external component count and average power must be minimized.
Availability
LTC1865LIMS#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor monitoring, and isolated data acquisition requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC1865LIMS#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 and maintains full product support, datasheets, and application notes for legacy Linear parts including the LTC1865LIMS#TRPBF.
The LTC1865LIMS#TRPBF belongs to Linear's precision µPower ADC family, designed specifically for compact, battery-operated, and thermally constrained systems needing 16-bit resolution without sacrificing speed or power efficiency.
FAQ
What is the maximum sampling frequency of the LTC1865LIMS#TRPBF?
The LTC1865LIMS#TRPBF supports a maximum sampling frequency of 150ksps, with a guaranteed conversion time of 3.7–4.66µs. This specification applies across the full operating temperature range (–40°C to +85°C) and supply voltage range (2.7V–3.6V). The part achieves this rate while maintaining 16-bit resolution and 82dB SNR, making it suitable for medium-bandwidth signal acquisition tasks such as vibration analysis and sensor logging.
Does the LTC1865LIMS#TRPBF require an external reference voltage?
Yes, the LTC1865LIMS#TRPBF requires an external reference voltage applied to the VREF pin. It accepts references from 1V to VCC (2.7–3.6V), allowing flexibility for ratiometric or absolute measurements. Unlike some ADCs with internal references, the LTC1865LIMS#TRPBF relies on external precision references (e.g., LT1460, REF192) to achieve its specified INL and gain error performance. The VREF pin must be bypassed with ≥1µF tantalum capacitor to AGND for optimal noise rejection.
How does the 2-channel multiplexer work on the LTC1865LIMS#TRPBF?
The LTC1865LIMS#TRPBF uses a 2-bit configuration word shifted into the SDI pin after CONV falls to select between four input combinations: single-ended CH0 or CH1 vs. GND, or differential CH0–CH1 or CH1–CH0. This MUX is software-controlled and reconfigurable before each conversion. The configuration is latched on the rising edge of SCK, and the selected channel pair is sampled during the next conversion cycle - enabling flexible, on-the-fly channel routing without external hardware.
What is the supply current of the LTC1865LIMS#TRPBF at 1ksps?
At 1ksps, the LTC1865LIMS#TRPBF draws only 10µA typical supply current due to its auto-shutdown feature, which powers down the internal circuitry between conversions. This value is specified over the full temperature range and reflects the device's optimized µPower design. In contrast, at its maximum 150ksps rate, ICC is 450µA typical - demonstrating a >45× reduction in quiescent current at low throughput, ideal for energy harvesting or long-life battery applications.
Is the LTC1865LIMS#TRPBF pin-compatible with any 12-bit alternatives?
Yes, the LTC1865LIMS#TRPBF is pin-compatible with the 12-bit LTC1860L/LTC1861L family in the same 8-lead MSOP package. This allows direct 16-bit resolution upgrades without PCB layout changes. However, note that the LTC1865LIMS#TRPBF requires a different SDI-based MUX configuration sequence and supports a wider reference range (1V–VCC vs. fixed VCC-only on some 12-bit variants), so firmware updates are necessary to leverage the enhanced functionality.
LTC1865LIMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 150k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865LIMS#TRPBF FAQ
1.How can I place an order for LTC1865LIMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LIMS#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 LTC1865LIMS#TRPBF reliable?
The price and inventory of LTC1865LIMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LIMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865LIMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LIMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LIMS#TRPBF?
LTC1865LIMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LIMS#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 LTC1865LIMS#TRPBF?
For technical support, including LTC1865LIMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LIMS#TRPBF requirements.
6.How does Aetrix verify that LTC1865LIMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LIMS#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 LTC1865LIMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865LIMS#TRPBF?
All LTC1865LIMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LIMS#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 LTC1865LIMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865LIMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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