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Analog Devices Inc. LTC1865LAIMS#TRPBF
- Part No.:
- LTC1865LAIMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865LAIMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,672
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Product details
Overview
LTC1865LAIMS#TRPBF from Analog Devices (acquired Linear Technology) is a 16-bit, 150ksps successive approximation ADC with software-selectable 2-channel MUX, single 3V supply operation, and MSOP-10 package. It features true differential input capability per channel, external reference pin (1V to VCC), and auto-shutdown reducing supply current to 10µA at 1ksps. It targets precision data acquisition in compact, battery-powered instrumentation.
For engineers reviewing the LTC1865LAIMS#TRPBF datasheet, LTC1865LAIMS#TRPBF pinout, LTC1865LAIMS#TRPBF application, or LTC1865LAIMS#TRPBF equivalent, key selection criteria include its 16-bit resolution at 150ksps, ±6 LSB INL, SPI/MICROWIRE-compatible serial interface, 82dB SNR, and -40°C to +85°C industrial temperature range - all critical for low-power, high-accuracy analog-to-digital conversion in space-constrained systems.
Technical Context
The LTC1865LAIMS#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its 2-bit SDI configuration word selects among four MUX modes: single-ended CH0/GND, CH1/GND, or differential CH0–CH1, CH1–CH0 - enabling flexible signal routing without external multiplexers.
It operates in full-duplex SPI mode: SDI accepts the channel select command on CONV↓, then SDO outputs the 16-bit conversion result synchronized to SCK falling edges. The device powers down automatically between conversions, achieving 450µA typical ICC at 150ksps and dropping to 10µA at 1ksps via dynamic current scaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 part in 65,536 quantization steps for high-precision measurement |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| INL Error | ±6 LSB max - ensures monotonicity and <0.1% end-point linearity error over full scale |
| SNR | 82 dB - enables >13.3 effective number of bits (ENOB) for clean signal digitization |
| Supply Current | 450 µA typ @ 150ksps - allows continuous operation on coin-cell batteries for months |
| Reference Range | 1V to VCC - permits ratiometric sensing or fixed-reference designs with 1V–3.6V flexibility |
| Operating Temp | –40°C to +85°C - qualified for industrial environments without derating |
Pinout & Package
Package: 10-lead plastic MSOP (MS), 3.0mm × 3.0mm body, 0.5mm pitch, exposed pad optional. Pin 1 marked by dot; pin 1 is CONV.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Input | Active-high trigger starts conversion; low enables SDO output and accepts SDI configuration |
| CH0 | Analog Input Channel 0 | Positive or negative input terminal depending on MUX configuration selected via SDI |
| CH1 | Analog Input Channel 1 | Positive or negative input terminal depending on MUX configuration selected via SDI |
| AGND | Analog Ground | Reference for analog inputs and internal circuitry; must connect directly to analog ground plane |
| DGND | Digital Ground | Reference for digital I/O; tied to AGND at single point to minimize noise coupling |
| SDI | Serial Data Input | Accepts 2-bit MUX configuration word on rising SCK edges after CONV↓ |
| VREF | Reference Input | Defines full-scale span; supports 1V–VCC externally applied voltage |
| VCC | Positive Supply | 2.7V–3.6V single supply; requires local 1µF tantalum bypass to AGND |
| SCK | Serial Clock Input | Up to 8MHz clock synchronizes full-duplex data transfer (SDI/SDO) |
| SDO | Serial Data Output | Outputs 16-bit conversion result on falling SCK edge; tri-stated when CONV high |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Eliminates need for external analog switches or multiplexers in dual-sensor systems |
| Auto Shutdown Between Conversions | Reduces average power by >97% at low sampling rates, extending battery life |
| True Differential Input Capability | Rejects common-mode noise on sensor pairs, improving EMI immunity in noisy environments |
| High-Z Analog Inputs with Low Leakage | ±1µA max input leakage enables direct connection to high-impedance sources (e.g., thermocouples, strain gauges) |
| No Minimum Data Transfer Rate | Allows indefinite idle periods between conversions - ideal for event-triggered or burst-mode acquisition |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Battery-powered wearable ECG or pulse oximeter acquiring two biopotential channels. IC Role / Device Role / Timing Role: Dual-channel ADC digitizing differential electrode signals with 16-bit resolution and 150ksps throughput. Use Value: Enables simultaneous lead-II and lead-III ECG capture using single IC, reducing BOM count and PCB area while maintaining clinical-grade accuracy. | Use Scenario: Remote RTD or thermocouple monitoring node in factory automation with 4–20mA loop integration. IC Role / Device Role / Timing Role: Precision front-end ADC converting conditioned sensor outputs with ratiometric reference stability. Use Value: Delivers ±0.1°C temperature accuracy over –40°C to +85°C using internal gain control and low-drift reference path. |
| Isolated Data Loggers | Low-Power Environmental Sensing |
Use Scenario: Solar-powered soil moisture and pH logger deployed in agricultural fields for seasonal deployment. IC Role / Device Role / Timing Role: Low-quiescent ADC interfacing with isolated analog front-end and microcontroller via SPI. Use Value: 10µA shutdown current extends 2000mAh Li-SOCl₂ battery life to >10 years in sleep mode between hourly measurements. | Use Scenario: Wireless air quality sensor node measuring PM2.5, CO₂, and VOCs with multi-sensor analog outputs. IC Role / Device Role / Timing Role: Shared ADC resource time-multiplexed across four analog sensor channels via software MUX control. Use Value: Reduces component count by 3 vs discrete ADCs per sensor, lowering system cost and calibration complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, SPI, 1.8V–3.6V supply, no internal MUX, 1-channel only | Higher speed but lacks integrated 2-channel MUX; requires external multiplexer for dual-input use | Select when sampling rate >150ksps is required and board space allows external MUX |
| MAX11100ETE+ | 16-bit, 500ksps, SPI, 2.7V–3.6V, integrated PGA (0.5x–16x), no MUX | Includes programmable gain amplifier but no channel selection; better for variable-sensitivity sensors | Select when signal conditioning gain is needed before digitization and dual-channel routing is handled externally |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1865LAIMS#TRPBF uniquely integrates a software-configurable 2-channel MUX within the same 10-pin MSOP footprint, eliminating layout overhead and timing skew associated with external switching - making it optimal for compact dual-sensor systems where size and channel coordination are critical.
Availability
LTC1865LAIMS#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, isolated data loggers, and low-power environmental sensing requiring stable component supply and guaranteed long-term availability.
Supply support for LTC1865LAIMS#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, 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 LTC1865L series belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for ultra-low-power, high-resolution ADC applications in space- and energy-constrained systems.
FAQ
What is the maximum clock frequency supported by the LTC1865LAIMS#TRPBF for reliable SPI communication?
The LTC1865LAIMS#TRPBF supports a maximum SCK frequency of 8MHz under recommended operating conditions. This allows full 16-bit data transfer in ≤2µs, enabling tight timing control in real-time systems. Operation above this limit risks setup/hold violations and data corruption, especially at temperature extremes. Always verify timing margins using the tWHCLK/tWLCLK specifications in the datasheet for your specific VCC and load conditions.
Does the LTC1865LAIMS#TRPBF require an external reference, or can it operate with VCC as reference?
The LTC1865LAIMS#TRPBF requires an external reference applied to the VREF pin - it does not internally derive reference from VCC. While the MSOP version accepts VREF from 1V to VCC, the SO-8 variant ties VREF internally to VCC. For the LTC1865LAIMS#TRPBF (MSOP-10), using VCC as reference is permissible only if VCC is stable, low-noise, and meets the 1V–3.6V range - but a dedicated low-drift reference (e.g., LT1460) is strongly recommended for best INL and temperature stability.
How does the MUX configuration work on the LTC1865LAIMS#TRPBF, and what are the valid channel combinations?
The LTC1865LAIMS#TRPBF uses a 2-bit SDI word (applied after CONV↓) to configure its analog MUX into four modes: (1) CH0–GND (single-ended), (2) CH1–GND (single-ended), (3) CH0–CH1 (differential), or (4) CH1–CH0 (differential). Each mode defines which pin serves as "+" and "–" for the SAR core. The configuration takes effect on the next CONV rising edge. No hardware strapping is needed - all selection is software-controlled via the serial interface.
What is the absolute maximum rating for analog input voltage on the LTC1865LAIMS#TRPBF?
The absolute maximum analog input voltage for the LTC1865LAIMS#TRPBF is (GND – 0.3V) to (VCC + 0.3V) on both CH0 and CH1 pins. Exceeding these limits risks latch-up or permanent damage. For safe operation, keep differential input (CH0 – CH1) within 0V to VREF, and ensure common-mode voltage stays between –0.05V and VCC/2 on CH1 (per datasheet Table "Analog Input Leakage Current"). Always use input protection clamps if overvoltage risk exists.
Can the LTC1865LAIMS#TRPBF be used in a fully isolated data acquisition system?
Yes - the LTC1865LAIMS#TRPBF is well-suited for isolated systems due to its low supply current (450µA), single-supply operation (2.7V–3.6V), and digital-only interface (CONV, SCK, SDI, SDO). When paired with a digital isolator (e.g., ADuM1401) on the SPI bus and isolated DC/DC converter (e.g., ADuM5000), it enables galvanic isolation up to 2.5kVRMS. Its high-impedance analog inputs simplify isolated front-end design, and the absence of analog ground references across isolation barriers simplifies layout.
LTC1865LAIMS#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:
- -
LTC1865LAIMS#TRPBF FAQ
1.How can I place an order for LTC1865LAIMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LAIMS#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 LTC1865LAIMS#TRPBF reliable?
The price and inventory of LTC1865LAIMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LAIMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865LAIMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LAIMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LAIMS#TRPBF?
LTC1865LAIMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LAIMS#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 LTC1865LAIMS#TRPBF?
For technical support, including LTC1865LAIMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LAIMS#TRPBF requirements.
6.How does Aetrix verify that LTC1865LAIMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LAIMS#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 LTC1865LAIMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865LAIMS#TRPBF?
All LTC1865LAIMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LAIMS#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 LTC1865LAIMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865LAIMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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