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Analog Devices Inc. LTC1864LACMS8#PBF
- Part No.:
- LTC1864LACMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864LACMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:270
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Product details
Overview
LTC1864LACMS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps successive approximation ADC with true differential analog input, external reference pin, and SPI/MICROWIRE-compatible 3-wire serial interface. It operates on a single 2.7V–3.6V supply, draws only 450µA at full speed, and auto-shutdowns to 10µA at 1ksps. Designed for precision low-power data acquisition, it enables direct connection to sensors without gain stages in ratiometric or externally referenced systems.
For engineers reviewing the LTC1864LACMS8#PBF datasheet, LTC1864LACMS8#PBF pinout, LTC1864LACMS8#PBF application, or LTC1864LACMS8#PBF equivalent, key selection criteria include its 16-bit no-missing-codes resolution, ±8 LSB INL, 82 dB SNR, MSOP-8 package compatibility, and support for 1V–VCC reference spans - critical for battery-powered instrumentation and isolated sensing interfaces.
Technical Context
The LTC1864LACMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion in a compact MSOP-8 package. Its differential input rejects common-mode noise, while the external VREF pin allows flexible full-scale adjustment from 1V to VCC, supporting both ratiometric and absolute measurement topologies.
Serial communication uses a 3-wire SPI/MICROWIRE protocol with CONV-controlled timing: conversion starts on CONV↑, data shifts out on SDO after CONV↓, synchronized by SCK falling edges. The device powers down automatically between conversions, delivering ultra-low quiescent current scaling linearly with sampling rate - 450µA at 150ksps, 10µA at 1ksps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - guarantees monotonicity and full code coverage across full temperature range. |
| Max Sampling Rate | 150ksps - supports real-time monitoring of fast transients in portable test equipment and motor control feedback loops. |
| INL Error | ±8 LSB max - ensures <0.12% full-scale linearity error, critical for high-fidelity sensor digitization. |
| Supply Current | 450µA typical at 150ksps; drops to 10µA at 1ksps - enables multi-year battery life in remote IoT nodes. |
| Reference Range | 1V to VCC (2.7V–3.6V) - permits rail-to-rail input operation when VREF = VCC and GND-referenced IN–. |
| SNR / SINAD | 82 dB / 82 dB at 1kHz - delivers >13.3 effective bits, suitable for precision weigh scales and medical diagnostics. |
| Input Voltage Range | IN+ and IN– each accept –0.05V to VCC+0.05V - accommodates overvoltage transients without latch-up. |
Pinout & Package
Package: 8-lead plastic 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; must be low-noise and bypassed to AGND with ≥1µF capacitor. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts up to VCC+0.05V. |
| IN– (Pin 3) | Differential Analog Input (–) | Common-mode rejection path; grounded for unipolar rail-to-rail operation with VREF = VCC. |
| GND (Pin 4) | Analog Ground | Single-point connection to analog ground plane; separates analog return from digital paths. |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V single supply; requires local 1µF tantalum bypass to GND for noise immunity. |
| SCK (Pin 7) | Serial Clock Input | Accepts DC–8MHz clock; data shifted on falling edge; rising edge captures output at host. |
| SDO (Pin 6) | Serial Data Output | 3-state output enabled by CONV↓; outputs 16-bit result MSB-first, then zeros if over-clocked. |
| CONV (Pin 5) | Convert Control Input | Active-high start trigger; held high post-conversion enters auto-shutdown mode (10µA). |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input | Rejects common-mode noise up to full bandwidth (20kHz linear BW), enabling clean measurements in noisy industrial environments. |
| Auto Shutdown Power Management | Reduces supply current from 450µA to 10µA at 1ksps - eliminates need for external power-gating circuitry. |
| Flexible Reference Interface | Supports 1V–VCC external references or internal VCC-based ratiometric operation - simplifies system-level voltage scaling. |
| High Input Impedance | ±1µA leakage current and 12pF input capacitance in sample mode - allows direct connection to high-Z sensors (e.g., thermocouples, strain gauges). |
| SPI/MICROWIRE Compatibility | No minimum data transfer rate; no clock polarity/phase constraints - interoperable with legacy microcontrollers and FPGAs. |
| Low Full-Scale Span Operation | Accurate 1V full-scale conversion with <±8 LSB INL - enables high-resolution digitization of low-output transducers without amplification. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter or environmental sensor node powered by coin cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing analog sensor outputs (e.g., RTD, pressure bridge) with minimal external components. Use Value: 450µA active current and 10µA sleep current extend battery life to >5 years in periodic wake-up modes. |
Use Scenario: Industrial PLC analog input module with opto-isolated signal path between field sensors and controller. IC Role / Device Role / Timing Role: Isolated-side ADC converting conditioned sensor signals before transmission across barrier. Use Value: Differential input and 20kHz full linear bandwidth reject common-mode noise induced by long cable runs and switching loads. |
| Medical Diagnostic Equipment | Test & Measurement Front-End |
|
Use Scenario: Portable ECG or pulse oximeter requiring high SNR and low power for FDA-compliant clinical accuracy. IC Role / Device Role / Timing Role: Signal-chain ADC capturing biopotential waveforms with 82dB SNR and <0.12% linearity error. Use Value: 16-bit no-missing-codes resolution and ±8 LSB INL ensure faithful reproduction of subtle waveform features (e.g., ST-segment morphology). |
Use Scenario: Benchtop DMM or automated test equipment front-end digitizing calibrated reference voltages and sensor outputs. IC Role / Device Role / Timing Role: Precision ADC in metrology-grade signal chain where traceability and repeatability are mandatory. Use Value: 1V–VCC reference flexibility and 82dB SINAD enable NIST-traceable calibration across multiple ranges without hardware reconfiguration. |
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 interface, 1.8V–3.6V supply, 500µA at 1MSPS; no auto-shutdown, higher speed but higher power. | Better suited for high-throughput data loggers; less optimal for ultra-low-power battery operation due to fixed bias current. | Select when sampling rate >150ksps is required and power budget allows >400µA continuous draw. |
| LTC2311CDHC-14#PBF | 14-bit, 250ksps, MSOP-10, 2.5V–5.25V supply, 2.5mW at 250ksps; higher speed and resolution trade-off vs. 16-bit depth. | Offers faster throughput and wider supply range but sacrifices 2 bits of resolution and linearity (±4 LSB INL). | Choose when system SNR requirement is ≤74dB and board space allows 10-pin MSOP footprint. |
Compared with ADS8860IDRCT and LTC2311CDHC-14#PBF, the LTC1864LACMS8#PBF uniquely balances 16-bit precision, 150ksps throughput, and sub-500µA active current in an industry-standard 8-pin MSOP - making it optimal for space-constrained, battery-sensitive applications where resolution outweighs raw speed.
Availability
LTC1864LACMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and medical diagnostic equipment requiring stable component supply and long-term manufacturability.
Supply support for LTC1864LACMS8#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, 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 LTC1864LACMS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered for low-power, high-resolution sensing in space- and energy-constrained systems.
FAQ
What is the operating temperature range of the LTC1864LACMS8#PBF?
The LTC1864LACMS8#PBF is rated for commercial temperature operation from 0°C to +70°C. This is confirmed by the "LTC1864LAC" suffix in the part number and specified in the Absolute Maximum Ratings table. It is not rated for extended industrial (–40°C to +85°C) or automotive temperature ranges.
Does the LTC1864LACMS8#PBF support single-ended input configurations?
No, the LTC1864LACMS8#PBF does not support single-ended inputs. It is a true differential-input ADC with dedicated IN+ and IN– pins. Unlike the LTC1865L variant, it lacks a multiplexer and cannot be configured for single-ended channel selection. Its input topology is strictly differential.
Can the LTC1864LACMS8#PBF operate with a 1V reference voltage?
Yes, the LTC1864LACMS8#PBF supports reference voltages from 1V to VCC (2.7V–3.6V). When VREF = 1V, the full-scale differential input range becomes 0V to 1V, enabling high-resolution digitization of low-output sensors without external amplification - verified in the "Reference Input" section and Recommended Operating Conditions.
What is the conversion time of the LTC1864LACMS8#PBF at maximum sampling rate?
The conversion time for the LTC1864LACMS8#PBF is 3.7µs (typical) to 4.66µs (maximum), as specified in the Timing Characteristics table. At the maximum 150ksps sampling rate, this corresponds to a 6.67µs period, leaving ~2µs for inter-conversion settling and interface overhead - consistent with the "CONV LOW = 2µs" note in Figure 1.
Is the LTC1864LACMS8#PBF pin-compatible with earlier 12-bit versions?
Yes, the LTC1864LACMS8#PBF is pin-compatible with the 12-bit LTC1860L/LTC1861L family in the MSOP-8 package, as explicitly stated in the Features list. This allows drop-in upgrades to 16-bit resolution without PCB layout changes, preserving existing SCK, SDO, CONV, VCC, GND, VREF, IN+, and IN– routing.
LTC1864LACMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 150k
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- SPI
- Configuration:
- 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:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864LACMS8#PBF FAQ
1.How can I place an order for LTC1864LACMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LACMS8#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 LTC1864LACMS8#PBF reliable?
The price and inventory of LTC1864LACMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LACMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864LACMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LACMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LACMS8#PBF?
LTC1864LACMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LACMS8#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 LTC1864LACMS8#PBF?
For technical support, including LTC1864LACMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LACMS8#PBF requirements.
6.How does Aetrix verify that LTC1864LACMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LACMS8#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 LTC1864LACMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864LACMS8#PBF?
All LTC1864LACMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LACMS8#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 LTC1864LACMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864LACMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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