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Analog Devices Inc. LTC1865LCMS#PBF
- Part No.:
- LTC1865LCMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865LCMS#PBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,508
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Product details
Overview
LTC1865LCMS#PBF 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 analog inputs, external reference support (1V to VCC), SPI/MICROWIRE-compatible 3-wire serial interface, and is optimized for portable instrumentation and isolated data acquisition.
For engineers reviewing the LTC1865LCMS#PBF datasheet, LTC1865LCMS#PBF pinout, LTC1865LCMS#PBF application, or LTC1865LCMS#PBF equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative options - all grounded in the official Linear Technology LTC1864L/LTC1865L datasheet (SN18645L) and package drawings.
Technical Context
The LTC1865LCMS#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both differential and single-ended input modes via a 2-bit configuration word shifted into SDI. Its conversion cycle begins on CONV rising edge, completes in 3.7–4.66µs, and supports full-duplex serial communication synchronized by SCK up to 8MHz.
It uses separate AGND and DGND pins in the MSOP package to minimize digital switching noise coupling into analog measurements, and requires low-noise 1µF tantalum bypassing on VCC and VREF. Input leakage is ±1µA, input capacitance is 12pF in sample mode, and full-power bandwidth is 10MHz - enabling accurate digitization of fast transients within its 150ksps throughput limit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes with no missing codes over full scale |
| Sampling Rate | 150ksps maximum - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| Supply Voltage | 2.7V to 3.6V - compatible with standard 3V battery and LDO rails without level shifting |
| Supply Current | 450µA typical at 150ksps; drops to 10µA at 1ksps via auto-shutdown - extends battery life in portable systems |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% absolute linearity error across full temperature range |
| SNR / SINAD | 82dB SNR, 82dB SINAD at 1kHz - enables >13-bit effective resolution in clean signal environments |
| Reference Range | 1V to VCC (MSOP version) - allows flexible scaling from low-voltage sensors to rail-to-rail inputs |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, JEDEC MO-187 variant. RoHS-compliant, lead-free, and rated for 0°C to 70°C operation (LTC1865LCMS).
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VREF (1) | Reference Input | Defines full-scale span (1V to VCC); must be low-noise and bypassed to AGND with ≥1µF capacitor |
| CH0 (2) | Analog Input Channel 0 | Configurable as "+" or "–" input depending on MUX address; high-impedance, ±1µA leakage |
| CH1 (3) | Analog Input Channel 1 | Configurable as "+" or "–" input depending on MUX address; shares same input structure as CH0 |
| AGND (4) | Analog Ground | Primary analog return path; must connect directly to analog ground plane with minimal trace length |
| DGND (5) | Digital Ground | Digital return for SDO/SDI/SCK; should tie to AGND at single point to avoid ground loops |
| SDI (6) | Serial Data Input | Receives 2-bit MUX configuration word on rising SCK edges before conversion starts |
| SDO (7) | Serial Data Output | Transmits 16-bit conversion result on falling SCK edges; tri-stated when CONV = high |
| SCK (8) | Serial Clock Input | Master clock for full-duplex SPI/MICROWIRE interface; supports up to 8MHz frequency |
| VCC (9) | Positive Supply | 2.7V–3.6V analog/digital supply; requires local 1µF tantalum bypass to AGND |
Key Features
| Feature | Design Value |
|---|---|
| 2-Channel Software-Selectable MUX | Enables single ADC to monitor two independent analog sources with programmable differential/single-ended mode per conversion |
| Auto Shutdown at Low Throughput | Reduces ICC from 450µA to 10µA at 1ksps - cuts power by 98% without firmware intervention |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pairs, enabling robust measurements in noisy industrial environments |
| Wide Reference Voltage Range | Accepts 1V–VCC reference - supports direct interfacing with low-voltage sensors or precision references like LT1460 |
| No Minimum Data Transfer Rate | Allows indefinite idle periods between conversions - eliminates timing constraints in event-driven or burst-mode systems |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter or sensor logger powered by two AA batteries with 3V nominal supply. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing voltage/current/temperature sensor outputs with configurable channel selection and low quiescent current. Use Value: 450µA active current and 10µA sleep current extend battery life to >1 year in intermittent measurement mode. |
Use Scenario: Industrial field transmitter with galvanic isolation between sensor front-end and microcontroller side. IC Role / Device Role / Timing Role: Isolated-side ADC converting analog sensor signals before transmission across opto-coupler or digital isolator. Use Value: Separate AGND/DGND pins and high CMRR reduce noise coupling across isolation barrier, improving measurement integrity. |
| Compact Signal Conditioning | Low-Power Remote Monitoring |
|
Use Scenario: Tiny 2-chip system pairing LTC6910-1 gain amplifier with LTC1865LCMS#PBF for 40dB programmable gain + 16-bit digitization. IC Role / Device Role / Timing Role: Final-stage ADC in miniature analog front-end, accepting amplified differential signals with rail-to-rail input capability. Use Value: 10MHz full-power bandwidth and 82dB SNR preserve signal fidelity after amplification without requiring external anti-alias filtering. |
Use Scenario: Wireless environmental node measuring temperature/humidity with duty-cycled sampling every 10 seconds. IC Role / Device Role / Timing Role: Power-gated ADC activated only during measurement windows, synchronized to MCU wake-up events. Use Value: Auto-shutdown eliminates need for external enable control; 2µs CONV setup time enables rapid on-demand conversion initiation. |
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 |
|---|---|---|---|
| LTC1865LIMS#PBF | Same die, –40°C to 85°C extended temperature grade; identical pinout, timing, and electrical specs | Required for automotive under-hood or industrial outdoor deployments where ambient exceeds 70°C | Select LTC1865LIMS#PBF when operating temperature range must cover –40°C to 85°C; otherwise LTC1865LCMS#PBF is optimal for cost-sensitive commercial designs. |
| ADS8860IDRCT | TI 16-bit 1MSPS SAR ADC in 3mm × 3mm WSON; higher speed but 1.5mA ICC at full rate and no auto-shutdown | Better suited for high-throughput systems with ample power budget; lacks low-power sleep mode below 10ksps | Choose ADS8860IDRCT only if sampling rate >150ksps is mandatory; LTC1865LCMS#PBF remains superior for sub-100µA average power targets. |
Compared with LTC1865LIMS#PBF, the LTC1865LCMS#PBF offers identical functionality at lower cost for 0°C–70°C applications, while the ADS8860IDRCT trades significant power efficiency for raw speed - making LTC1865LCMS#PBF the preferred choice for battery-powered or thermally constrained designs demanding true 16-bit accuracy at ultra-low quiescent current.
Availability
LTC1865LCMS#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and compact signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1865LCMS#PBF 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 continuity, datasheet support, and manufacturing for legacy Linear parts including the LTC1865 series.
The LTC1865LCMS#PBF belongs to Linear's precision µPower SAR ADC family, designed specifically for space-constrained, battery-operated, and isolated measurement systems where 16-bit resolution must coexist with sub-500µA active current.
FAQ
What is the operating temperature range of the LTC1865LCMS#PBF?
The LTC1865LCMS#PBF is specified for 0°C to 70°C ambient operation. This commercial-grade temperature range is clearly defined in the Absolute Maximum Ratings and Recommended Operating Conditions sections of the official datasheet (SN18645L Rev. G). It is distinct from the industrial-grade LTC1865LIMS#PBF (–40°C to 85°C) and automotive variants. Thermal derating is not required within this range.
Does the LTC1865LCMS#PBF require an external reference voltage?
Yes - the LTC1865LCMS#PBF requires an external reference voltage applied to the VREF pin (Pin 1), which defines its full-scale input range. The datasheet specifies support for 1V to VCC (2.7V–3.6V), enabling flexibility with internal LDOs or precision references like the LT1460. Unlike the SO-8 version, the MSOP package does not internally tie VREF to VCC.
How many analog input channels does the LTC1865LCMS#PBF support?
The LTC1865LCMS#PBF supports two analog input channels (CH0 and CH1), selectable via a 2-bit configuration word shifted into the SDI pin. These can be configured in differential mode (e.g., CH0–CH1) or single-ended mode (e.g., CH0–GND or CH1–GND), as defined in Table 1 of the datasheet. It is not a 1-channel device like the LTC1864L.
What serial interface protocol does the LTC1865LCMS#PBF use?
The LTC1865LCMS#PBF uses a 3-wire SPI/MICROWIRE-compatible interface with dedicated SDI (data in), SDO (data out), and SCK (clock) pins. It operates in full-duplex mode: the 2-bit MUX configuration is clocked in on SDI during the first two SCK rising edges after CONV falls, and the 16-bit conversion result is clocked out on SDO on subsequent SCK falling edges.
Can the LTC1865LCMS#PBF operate from a 2.5V supply?
No - the LTC1865LCMS#PBF has a minimum supply voltage of 2.7V as specified in the Recommended Operating Conditions table (VCC min = 2.7V). Operation below 2.7V is outside guaranteed specifications and may result in conversion errors, increased INL, or failure to meet timing parameters such as tCONV or fSMPL(MAX).
LTC1865LCMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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:
- -
LTC1865LCMS#PBF FAQ
1.How can I place an order for LTC1865LCMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LCMS#PBF 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 LTC1865LCMS#PBF reliable?
The price and inventory of LTC1865LCMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LCMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1865LCMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LCMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LCMS#PBF?
LTC1865LCMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LCMS#PBF 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 LTC1865LCMS#PBF?
For technical support, including LTC1865LCMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LCMS#PBF requirements.
6.How does Aetrix verify that LTC1865LCMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LCMS#PBF 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 LTC1865LCMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1865LCMS#PBF?
All LTC1865LCMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LCMS#PBF, 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 LTC1865LCMS#PBF part is unused and in its original packaging.
Return procedure for LTC1865LCMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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