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Analog Devices Inc. LTC1865LACMS#TRPBF
- Part No.:
- LTC1865LACMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865LACMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,385
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Product details
Overview
LTC1865LACMS#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, external reference support (1V to VCC), SPI/MICROWIRE-compatible 3-wire serial interface, and integrated sample-and-hold - ideal for portable instrumentation and isolated data acquisition systems.
For engineers reviewing the LTC1865LACMS#TRPBF datasheet, LTC1865LACMS#TRPBF pinout, LTC1865LACMS#TRPBF application, or LTC1865LACMS#TRPBF equivalent, key selection criteria include its 16-bit resolution with ±6 LSB INL, 82dB SNR, 2-channel MUX configurability via SDI, MSOP-8 thermal performance (θJA = 210°C/W), and compatibility with ratiometric or precision external references.
Technical Context
The LTC1865LACMS#TRPBF implements a switched-capacitor SAR architecture with internal bias and auto-power-down control logic that reduces current between conversions. Its 2-bit SDI configuration word selects among four analog input combinations (single-ended CH0/GND, CH1/GND, or differential CH0–CH1, CH1–CH0), enabling flexible signal routing without external switches.
It uses a 3-wire serial interface where CONV initiates conversion and enables SDO output, SCK synchronizes full-duplex data transfer (SDI input + SDO output), and timing adheres to strict setup/hold requirements (e.g., tsuDI = 30ns, tCONV = 3.7–4.66µs). The MSOP-8 package integrates separate AGND and DGND pins to minimize digital switching noise coupling into analog measurement paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete codes for high-precision sensor or transducer digitization |
| Max Sampling Rate | 150ksps - supports real-time monitoring of signals up to ~20kHz full-linear bandwidth |
| INL Error | ±6 LSB (typ) - ensures monotonicity and <0.1% end-point linearity error over full scale |
| SNR | 82 dB - enables >13.3 effective number of bits (ENOB) in clean signal environments |
| Supply Current | 450 µA (typ) at 150ksps; drops to 10 µA at 1ksps - extends battery life in portable designs |
| Reference Range | 1V to VCC (MSOP version) - allows direct interfacing with low-voltage references or ratiometric sensors |
| Digital Interface | SPI/MICROWIRE-compatible 3-wire - simplifies integration with microcontrollers lacking dedicated ADC peripherals |
Pinout & Package
Package: 8-lead MSOP (3.0mm × 3.0mm × 0.86mm), RoHS-compliant, moisture sensitivity level 1, rated for 0°C to 70°C ambient operation (LTC1865LACMS).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Control Input | Active-high edge-triggered start signal; low level enables SDO output and configures MUX via SDI |
| CH0 | Analog Input Channel 0 | High-impedance input used as "+" or "–" depending on SDI configuration; supports rail-to-rail input span when referenced to GND |
| CH1 | Analog Input Channel 1 | High-impedance input used as "+" or "–" depending on SDI configuration; shares same sampling aperture as CH0 for simultaneous capture |
| AGND | Analog Ground Reference | Primary return path for analog inputs and reference; must be tied directly to low-noise analog ground plane |
| DGND | Digital Ground Reference | Return path for digital I/O; separated from AGND to prevent noise coupling but connected at single point |
| SDI | Serial Data Input | Receives 2-bit MUX configuration word on rising SCK edges after CONV falls; defines next conversion's input pair |
| SDO | Serial Data Output | Transmits 16-bit conversion result on falling SCK edges; tri-stated when CONV is high |
| SCK | Serial Clock Input | Master clock up to 8MHz; synchronizes both SDI write and SDO read in full-duplex mode |
| VCC | Positive Supply | 2.7V–3.6V single supply; requires local 1µF tantalum bypass to AGND for stable conversion accuracy |
| VREF | External Reference Input | Defines full-scale range (1V to VCC); must be low-noise and bypassed independently to AGND |
Key Features
| Feature | Design Value |
|---|---|
| 2-Channel Software-Selectable MUX | Configurable via 2-bit SDI word - eliminates need for external analog switches in multi-sensor systems |
| Auto Shutdown Between Conversions | Reduces ICC from 450µA to 10µA at 1ksps - cuts average power by >97% in burst-mode sensing |
| True Differential or Single-Ended Input Modes | Supports both configurations per Table 1 - enables common-mode noise rejection or simplified single-ended sensor interfacing |
| 16-Bit No-Missing-Codes Performance | Guaranteed monotonicity across full temperature range - critical for closed-loop control and metrology |
| Low Input Leakage (±1µA) | Minimizes gain error when driving high-impedance sources (e.g., thermocouples, piezoelectric sensors) |
| Flexible Reference Support (1V to VCC) | Enables use with micropower references (e.g., LT1460) or direct ratiometric connection to sensor excitation |
Applications
| Portable Battery-Powered Instrumentation | Isolated Remote Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor node logging temperature, pressure, and humidity with 16-bit resolution. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from multiple sensors via software-controlled channel sequencing. Use Value: 450µA active current and 10µA sleep current extend AA battery life to >1 year in periodic wake-up mode. | Use Scenario: Industrial field transmitter sending digitized process variables across galvanically isolated RS-485 links. IC Role / Device Role / Timing Role: High-accuracy front-end ADC capturing sensor outputs before isolation barrier; synchronized via isolated clock. Use Value: ±6 LSB INL and 82dB SNR ensure <0.02% total measurement uncertainty even with noisy 24V loop power. |
| Compact Medical Sensor Interfaces | Low-Power Test & Measurement Equipment |
Use Scenario: Wearable ECG monitor acquiring biopotential signals from dry electrodes with minimal amplification. IC Role / Device Role / Timing Role: Direct digitization of amplified, filtered analog bio-signals using differential CH0/CH1 inputs to reject CM noise. Use Value: True differential input architecture rejects >60dB of 50/60Hz interference without external instrumentation amps. | Use Scenario: Benchtop data logger capturing transient waveforms from vibration or acoustic sensors. IC Role / Device Role / Timing Role: High-speed sampling ADC interfaced to FPGA or ARM Cortex-M7 for real-time FFT analysis. Use Value: 150ksps rate with 3.7µs conversion time enables 6.6µs minimum inter-sample interval for Nyquist-compliant 75kHz signal capture. |
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-only, no MUX; higher power (1.2mA), smaller WSON-10 package | Requires external MUX for multi-channel use; better for high-speed single-channel systems | Choose ADS8860IDRCT when sampling rate >200ksps is required and channel count is fixed |
| LTC2311CDHC-16#TRPBF | 16-bit, 500ksps, pseudo-differential input only; no software-configurable MUX; 2.5V reference fixed | Limited to single-ended vs. GND or differential pairs - no CH0/CH1 reconfiguration | Choose LTC2311CDHC-16#TRPBF when board space is constrained and dual-channel flexibility is not needed |
Compared with LTC1865LACMS#TRPBF, ADS8860IDRCT offers 6.7× higher throughput but lacks integrated MUX and consumes 2.7× more current; LTC2311CDHC-16#TRPBF provides faster conversion and lower noise floor but sacrifices channel selection flexibility and reference voltage range adaptability.
Availability
LTC1865LACMS#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated remote data acquisition, and compact medical sensor interfaces requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC1865LACMS#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 precision data acquisition portfolio, designed specifically for low-power, high-resolution applications where size, energy efficiency, and measurement integrity are critical - such as handheld test equipment and battery-operated IoT endpoints.
FAQ
What is the operating temperature range for the LTC1865LACMS#TRPBF?
The LTC1865LACMS#TRPBF is specified for commercial-grade operation from 0°C to 70°C ambient temperature. This variant carries the "AC" suffix in its ordering code, distinguishing it from industrial (-40°C to 85°C) and extended temperature versions. All electrical specifications in the datasheet marked with ● apply across this full range.
Does the LTC1865LACMS#TRPBF require an external reference voltage?
Yes - the LTC1865LACMS#TRPBF requires an external reference voltage applied to the VREF pin. Unlike the SO-8 version, the MSOP-8 variant supports an adjustable reference from 1V to VCC, enabling ratiometric measurements or use with precision low-voltage references like the LT1460. The reference must be low-noise and locally bypassed to AGND with ≥1µF capacitance.
How does the 2-channel MUX in the LTC1865LACMS#TRPBF work?
The LTC1865LACMS#TRPBF uses a 2-bit configuration word shifted into SDI after CONV falls to select among four input combinations: CH0–GND, CH1–GND, CH0–CH1, or CH1–CH0. This software-selectable MUX eliminates external analog switches and allows dynamic channel routing under microcontroller control - all within the same 8-pin MSOP footprint.
What is the maximum clock frequency supported by the LTC1865LACMS#TRPBF serial interface?
The LTC1865LACMS#TRPBF supports a maximum SCK frequency of 8MHz, as specified in the Recommended Operating Conditions table. At this rate, the full 16-bit conversion result can be read out in ≤2µs after conversion completes, enabling tight timing control in deterministic real-time systems.
Can the LTC1865LACMS#TRPBF operate from a 2.5V supply?
No - the LTC1865LACMS#TRPBF has a minimum supply voltage of 2.7V. Operation below 2.7V violates Absolute Maximum Ratings and may cause conversion errors, increased INL, or failure to power up correctly. For 2.5V systems, consider the pin-compatible LTC1865LIMS (industrial grade) or evaluate alternative 16-bit ADCs with lower VCC minima.
LTC1865LACMS#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865LACMS#TRPBF FAQ
1.How can I place an order for LTC1865LACMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LACMS#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 LTC1865LACMS#TRPBF reliable?
The price and inventory of LTC1865LACMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LACMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865LACMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LACMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LACMS#TRPBF?
LTC1865LACMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LACMS#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 LTC1865LACMS#TRPBF?
For technical support, including LTC1865LACMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LACMS#TRPBF requirements.
6.How does Aetrix verify that LTC1865LACMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LACMS#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 LTC1865LACMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865LACMS#TRPBF?
All LTC1865LACMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LACMS#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 LTC1865LACMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865LACMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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