My Inquiry
My Account
Analog Devices Inc. LTC1865LACMS#PBF
- Part No.:
- LTC1865LACMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865LACMS#PBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,401
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LTC1865LACMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps, 2-channel software-selectable successive approximation ADC in an 8-lead MSOP package, operating from a single 3V supply with 450µA typical supply current at full speed and auto-shutdown to 10µA at 1ksps. It features true differential or single-ended input multiplexing, SPI/MICROWIRE-compatible serial interface, external reference pin, and high-impedance analog inputs enabling direct sensor interfacing in portable instrumentation.
For engineers reviewing the LTC1865LACMS#PBF datasheet, LTC1865LACMS#PBF pinout, LTC1865LACMS#PBF application, or LTC1865LACMS#PBF equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support for low-power, high-resolution data acquisition designs requiring stable component sourcing and precise timing alignment.
Technical Context
The LTC1865LACMS#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both differential and single-ended input modes via a 2-bit software-configurable MUX. Its conversion cycle begins on CONV rising edge, completes in 3.7–4.66µs, and supports full-duplex serial communication using SCK, SDI, and SDO pins with no minimum data transfer rate requirement.
It operates across 0°C to 70°C (Commercial grade), accepts external reference voltages from 1V to VCC, and maintains ±8 LSB INL and 82dB SNR at 1kHz input. The MSOP-8 package separates analog and digital grounds (AGND/DGND), mandates tight bypassing (≥1µF tantalum on VCC/VREF), and requires careful PCB layout with analog ground plane isolation to preserve 16-bit accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization |
| Max Sampling Rate | 150ksps - enables real-time capture of signals up to ~75kHz Nyquist bandwidth |
| Supply Current | 450µA typ @ 150ksps; drops to 10µA @ 1ksps - enables battery-powered operation for >1 year in intermittent-sampling systems |
| INL Error | ±8 LSB max - ensures monotonicity and accurate end-point linearity over full temperature range |
| SNR | 82dB - supports >13.3 effective number of bits (ENOB) for precision measurement applications |
| Reference Range | 1V to VCC - allows flexible scaling from low-voltage sensors to rail-to-rail inputs without external gain stages |
| Digital Interface | SPI/MICROWIRE-compatible, 3-wire full-duplex - simplifies host MCU integration with standard peripheral drivers |
Pinout & Package
Package: 8-lead MSOP (3.0mm × 3.0mm × 1.1mm), RoHS-compliant, moisture sensitivity level 1. Pin 1 = CONV; Pin 2 = CH0; Pin 3 = CH1; Pin 4 = AGND; Pin 5 = DGND; Pin 6 = SDI; Pin 7 = SCK; Pin 8 = VCC. VREF is internally tied to VCC in SO-8 variants but externally accessible on MSOP versions - this part uses MSOP with external VREF.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV (Pin 1) | Convert Start Input | Active-high edge-triggered control initiating conversion; low level enables SDO output and configures MUX via SDI |
| CH0 / CH1 (Pins 2, 3) | Analog Input Channels | Software-selectable differential or single-ended inputs referenced to AGND; support ratiometric or absolute measurements |
| AGND (Pin 4) | Analog Ground | Primary analog reference node; must connect directly to low-impedance analog ground plane to minimize noise coupling |
| DGND (Pin 5) | Digital Ground | Separate digital return path; tied to AGND at single point to prevent ground loops and maintain 16-bit accuracy |
| SDI (Pin 6) | Serial Data Input | Receives 2-bit MUX configuration word on rising SCK edges before conversion; determines next channel selection |
| SCK (Pin 7) | Serial Clock | Synchronizes full-duplex data transfer; supports up to 8MHz clock frequency for fast readout |
| VCC (Pin 8) | Positive Supply | Single 2.7V–3.6V supply powering analog and digital sections; requires local 1µF bypass to AGND |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces average current from 450µA to 10µA at 1ksps, extending battery life in duty-cycled systems |
| Software-selectable 2-channel MUX | Enables flexible signal routing (CH0/CH1 differential, CH0-GND, CH1-GND) without external switches or reconfiguration hardware |
| High-impedance analog inputs | ±1µA leakage allows direct connection to high-output-impedance sensors (e.g., thermocouples, RTDs) without buffer amplifiers |
| No minimum data transfer rate | Eliminates timing constraints on host controller - compatible with slow microcontrollers or low-power sleep modes |
| True differential input capability | Rejects common-mode noise up to 20kHz linear bandwidth, critical for noisy industrial or motor-control environments |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor logger powered by coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing voltage, temperature, or pressure sensor outputs with minimal power overhead. Use Value: 450µA active current and 10µA sleep current enable >2-year battery life at 1-sample-per-second duty cycle. | Use Scenario: Industrial PLC module acquiring analog signals across galvanically isolated barriers. IC Role / Device Role / Timing Role: Isolated-side ADC converting field sensor outputs before transmission via opto-coupled or magnetic-isolated serial link. Use Value: Differential input mode rejects common-mode transients induced by motor drives or EMI, preserving measurement integrity. |
| Compact Sensor Interface | Low-Power Battery Monitoring |
Use Scenario: Wearable health monitor measuring biopotentials (ECG, EMG) with ultra-low power budget. IC Role / Device Role / Timing Role: Front-end ADC sampling conditioned analog biosignals with rail-to-rail input capability and external reference scaling. Use Value: 1V–VCC reference range allows matching sensor output span (e.g., 0–1.8V) without level-shifting circuitry. | Use Scenario: Smart battery pack monitoring cell voltage, temperature, and charge/discharge current. IC Role / Device Role / Timing Role: Precision ADC measuring stacked Li-ion cell voltages with high common-mode rejection. Use Value: ±8 LSB INL and 82dB SNR ensure <±1mV absolute accuracy over temperature for state-of-charge estimation. |
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 functionality and pinout; rated for –40°C to 85°C industrial temperature range vs. 0°C to 70°C | Required for outdoor, automotive, or factory-floor deployments where ambient exceeds 70°C | Select when extended temperature operation is mandatory; otherwise LTC1865LACMS#PBF offers lower cost for commercial-grade systems |
| AD7980BRMZ | 16-bit, 1MSPS, SPI interface, 750µA supply current; no internal MUX; requires external reference buffer | Better speed and SNR (91dB), but higher power and no built-in channel selection - needs external multiplexer for multi-channel use | Choose AD7980BRMZ only if sampling rate >150ksps is required and system can accommodate added complexity and power |
Compared with LTC1865LIMS#PBF, the LTC1865LACMS#PBF trades extended temperature range for lower unit cost and identical performance in commercial environments; versus AD7980BRMZ, it provides integrated 2-channel MUX and lower active power at the expense of maximum throughput and SNR.
Availability
LTC1865LACMS#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, compact sensor interfaces, and low-power battery monitoring requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for LTC1865LACMS#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 its precision analog product lines, including high-performance data converters, references, and signal conditioning ICs.
The LTC1865LACMS#PBF belongs to Linear's µPower 16-bit SAR ADC family, designed specifically for space-constrained, battery-operated systems demanding high resolution without sacrificing efficiency or ease of integration.
FAQ
What is the operating temperature range for the LTC1865LACMS#PBF?
The LTC1865LACMS#PBF is specified for 0°C to 70°C (Commercial grade). This range is confirmed in the Absolute Maximum Ratings table and Operating Temperature Range section of the official datasheet. Operation outside this range may result in degraded INL, offset drift, or failure to meet guaranteed specifications. For industrial applications requiring –40°C to 85°C, the LTC1865LIMS#PBF variant is recommended.
Does the LTC1865LACMS#PBF require an external reference voltage?
Yes - the LTC1865LACMS#PBF uses an external reference voltage applied to the VREF pin, supporting 1V to VCC (3.6V max). Unlike the SO-8 version where VREF is internally tied to VCC, the MSOP package (including LTC1865LACMS#PBF) provides full external reference flexibility. This enables ratiometric measurements with sensors or precision scaling using references like the LT1460 series.
How does the 2-channel MUX work on the LTC1865LACMS#PBF?
The LTC1865LACMS#PBF's MUX is configured via a 2-bit word shifted into SDI during the CONV low period, prior to conversion. Supported modes include differential (CH0–CH1), single-ended CH0-to-GND, CH1-to-GND, and CH0-to-CH1 with polarity reversal. Table 1 in the datasheet defines all four combinations. No external hardware or register writes are needed - configuration occurs dynamically per conversion cycle.
What is the minimum supply voltage for reliable operation of the LTC1865LACMS#PBF?
The LTC1865LACMS#PBF requires a minimum supply voltage of 2.7V, as specified in the Recommended Operating Conditions table. Below 2.7V, parameters such as INL, SNR, and conversion time are not guaranteed. At 2.7V, full 16-bit performance is maintained, and supply current remains within datasheet limits (≤1.0mA typical at 150ksps).
Can the LTC1865LACMS#PBF interface directly with a 3.3V microcontroller?
Yes - the LTC1865LACMS#PBF's digital I/O is fully compatible with 3.3V logic: VIH is 1.9V min (at VCC = 3.3V), VOL is 0.3V max (at IO = 400µA), and VOH is 2.3–2.6V (at VCC = 2.7V). When operated from 3.3V, all digital thresholds scale accordingly, ensuring robust noise margins and eliminating level-shifter requirements in standard 3.3V systems.
LTC1865LACMS#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:
- -
LTC1865LACMS#PBF FAQ
1.How can I place an order for LTC1865LACMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LACMS#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 LTC1865LACMS#PBF reliable?
The price and inventory of LTC1865LACMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LACMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1865LACMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LACMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LACMS#PBF?
LTC1865LACMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LACMS#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 LTC1865LACMS#PBF?
For technical support, including LTC1865LACMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LACMS#PBF requirements.
6.How does Aetrix verify that LTC1865LACMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LACMS#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 LTC1865LACMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1865LACMS#PBF?
All LTC1865LACMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LACMS#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 LTC1865LACMS#PBF part is unused and in its original packaging.
Return procedure for LTC1865LACMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LTC1865LACMS#PBF Tags
-
ADC081C021CIMKX/NOPB
Texas Instruments
-
MCP3021A5T-E/OT
Microchip Technology
-
TLA2024IRUGR
Texas Instruments
-
MCP3221A5T-E/OT
Microchip Technology
-
MCP3221A5T-I/OT
Microchip Technology
-
MCP3221A4T-E/OT
Microchip Technology
-
MCP3221A6T-E/OT
Microchip Technology
-
MCP3221A0T-E/OT
Microchip Technology
-
MCP3221A1T-E/OT
Microchip Technology
-
ADC121S021CIMFX/NOPB
Texas Instruments
-
MCP3001-I/MS
Microchip Technology
-
MCP3001-I/SN
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
