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Analog Devices Inc. LTC1864LIS8#PBF
- Part No.:
- LTC1864LIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1864LIS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,517
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Product details
Overview
LTC1864LIS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps successive approximation ADC with true differential analog input, single 3V supply operation, and auto-shutdown power management. It features 450µA typical supply current at full speed, 82dB SNR, ±8 LSB INL, and operates in –40°C to 85°C industrial temperature range. Designed for precision low-power data acquisition, it directly interfaces with sensor bridges and transducer outputs without external gain stages.
For engineers reviewing the LTC1864LIS8#PBF datasheet, LTC1864LIS8#PBF pinout, LTC1864LIS8#PBF application, or LTC1864LIS8#PBF equivalent, key selection criteria include its MSOP-8 package, SPI/MICROWIRE-compatible 3-wire serial interface, differential input architecture, reference voltage flexibility (1V to VCC), and guaranteed no missing codes over 14 bits - critical for high-fidelity instrumentation and isolated sensing systems.
Technical Context
The LTC1864LIS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion in a single 3V supply. Its differential input stage rejects common-mode noise while supporting unipolar spans from 1V to VCC full-scale, with high-impedance analog inputs (±1µA leakage) and 12pF input capacitance in sample mode.
Conversion is initiated by a rising edge on CONV; completion occurs in 3.7–4.66µs, after which the device enters auto-shutdown, reducing current to 10µA at 1ksps. Serial data is clocked out via SDO on falling SCK edges, with timing fully specified for DC to 8MHz SCK and compatible with microcontrollers, DSPs, and PLDs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes over 14 bits - ensures monotonicity and integrity for closed-loop control and metrology. |
| Sampling Rate | 150ksps maximum - supports anti-aliasing filter design up to ~70kHz with adequate guard band. |
| Supply Current | 450µA typical at 150ksps; drops to 10µA at 1ksps - enables battery life extension in portable instrumentation. |
| INL Error | ±8 LSB max - limits absolute accuracy error to ±0.12% of full scale at 16-bit resolution. |
| SNR | 82dB - supports effective resolution of ~13.3 bits for clean signal capture in noisy environments. |
| Input Range | Differential: 0V to VREF; absolute: IN+ = –0.05V to VCC+0.05V, IN– = –0.05V to VCC/2 - allows direct connection to grounded sensors and rail-to-rail operation when IN– = GND. |
| Reference Range | 1V to VCC (3.6V max) - permits ratiometric measurement with sensor excitation or use of low-voltage precision references. |
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; accepts 1V–VCC; must be bypassed with ≥1µF tantalum to AGND for noise immunity. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance sampling node; measures voltage relative to IN–; supports common-mode rejection. |
| IN– (Pin 3) | Differential Analog Input (–) | Paired with IN+; zero code occurs when IN+ = IN–; can be grounded for pseudo-single-ended rail-to-rail operation. |
| GND (Pin 4) | Analog Ground | Primary return for analog circuitry; must connect directly to analog ground plane with minimal trace length. |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; falling edge enables SDO output; held high after conversion triggers auto-shutdown. |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI/MICROWIRE-compatible output; 16-bit result shifted on falling SCK edges; Hi-Z when CONV = high. |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports DC to 8MHz; receiver captures data on rising edge. |
| VCC (Pin 8) | Positive Supply | Single 2.7V–3.6V supply; requires local 1µF bypass to GND; noise on VCC directly impacts conversion accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise up to full bandwidth; enables accurate bridge sensor measurements without instrumentation amplifiers. |
| Auto Shutdown Power Management | Reduces supply current from 450µA to 10µA between conversions - eliminates need for external power sequencing in intermittent-sampling systems. |
| Flexible Reference Support | Accepts external references from 1V to VCC, enabling ratiometric designs with resistive sensors or low-noise bandgap references. |
| No Minimum Data Transfer Rate | Permits indefinite idle periods between conversions - simplifies firmware timing and supports event-triggered acquisition. |
| Guaranteed No Missing Codes | Valid over 14-bit range - ensures deterministic behavior in safety-critical feedback loops and position encoders. |
Applications
| High-Precision Sensor Interface | Portable Battery-Powered Instrumentation |
|---|---|
Use Scenario: Measuring strain gauge or load cell outputs in structural health monitoring systems with ±0.1% accuracy requirement. IC Role / Device Role / Timing Role: 16-bit SAR ADC digitizing differential mV-level signals; CONV-triggered acquisition synchronized to mechanical excitation pulses. Use Value: Eliminates external gain stage due to high input impedance and 1V–VCC reference flexibility, reducing BOM count and board area by 30%. | Use Scenario: Handheld multimeter with dual-range voltage/current measurement and 24-hour battery life. IC Role / Device Role / Timing Role: Primary data converter acquiring samples at 10ksps during active measurement; auto-shutdown reduces average current to <50µA during standby. Use Value: 450µA active current and 10µA sleep current enable >100k conversions per AA cell, meeting IEC 61010 portability requirements. |
| Isolated Industrial Data Acquisition | Medical Vital Sign Monitoring |
Use Scenario: DIN-rail mounted PLC module acquiring thermocouple and RTD signals across 1000V isolation barrier. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing to optocoupled or digital isolator serial bus; differential inputs reject ground loop noise. Use Value: ±8 LSB INL and 82dB SNR support Class A accuracy per IEC 61000-4-5 surge immunity testing without calibration drift. | Use Scenario: Wearable ECG front-end capturing low-amplitude biopotentials (<5mVpp) with motion artifact rejection. IC Role / Device Role / Timing Role: Low-noise ADC sampling at 1ksps with programmable gain amplifier (PGA) output; differential input rejects 50/60Hz mains interference. Use Value: 12pF input capacitance and ±1µA leakage allow direct coupling to ultra-low-output bioamplifiers without charge injection errors. |
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 |
|---|---|---|---|
| ADS8325IDR | 16-bit, 100ksps, SPI interface, 2.7–5.5V supply, ±1 LSB INL, no auto-shutdown | Higher supply voltage range but fixed 5V-tolerant I/O; lacks dynamic power scaling for battery systems | Select when system uses 5V logic and requires tighter INL; avoid if <3.6V supply or ultra-low quiescent current is mandatory. |
| LTC2311CDHC-14#PBF | 14-bit, 250ksps, pseudo-differential input, 2.5–5.5V supply, 78dB SNR, no external reference pin | Higher speed but lower resolution and no true differential mode; internal reference only | Select for higher throughput where 14-bit resolution suffices and external reference flexibility is not required. |
Compared with ADS8325IDR and LTC2311CDHC-14#PBF, the LTC1864LIS8#PBF uniquely balances 16-bit resolution, 150ksps speed, true differential input, and sub-10µA sleep current - making it optimal for compact, battery-constrained, high-accuracy sensor nodes where reference voltage adaptability and noise immunity are critical.
Availability
LTC1864LIS8#PBF is available at Aetrix Electronics and suitable for high-precision sensor interface, portable battery-powered instrumentation, isolated industrial data acquisition, and medical vital sign monitoring requiring stable component supply and long-term manufacturability.
Supply support for LTC1864LIS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1864LIS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for low-power, high-resolution measurement in space- and energy-constrained embedded systems.
FAQ
What is the operating temperature range of the LTC1864LIS8#PBF?
The LTC1864LIS8#PBF is rated for operation from –40°C to +85°C (industrial grade), as confirmed by the "LTC1864LI" suffix in the part marking and Absolute Maximum Ratings table. This range is validated across all electrical specifications including INL, SNR, and supply current, ensuring reliability in harsh environmental deployments without derating.
Does the LTC1864LIS8#PBF require an external reference voltage?
Yes, the LTC1864LIS8#PBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports reference voltages from 1V to VCC (max 3.6V), enabling ratiometric configurations with sensor excitation or use with precision references like the LT1460. The device does not include an internal reference.
How does the auto-shutdown feature work on the LTC1864LIS8#PBF?
The LTC1864LIS8#PBF automatically enters low-power shutdown mode when the CONV pin remains high after conversion completion (tCONV ≈ 4.66µs). In this state, supply current drops to 10µA at 1ksps sampling rate. Conversion resumes on the next rising edge of CONV, eliminating need for external power control circuitry.
What is the maximum clock frequency supported by the LTC1864LIS8#PBF serial interface?
The LTC1864LIS8#PBF supports a maximum SCK frequency of 8MHz, as specified in the Recommended Operating Conditions table. This allows full 16-bit data transfer in under 2µs, enabling tight timing margins in real-time control loops and high-throughput data logging systems.
Can the LTC1864LIS8#PBF interface directly with a microcontroller GPIO without level shifting?
Yes - the LTC1864LIS8#PBF is fully compatible with 3V microcontrollers: VIH = 1.9V (min at VCC = 3.3V), VIL = 0.45V (max at VCC = 2.7V), VOH = 2.3V (min at IO = 10µA), and VOL = 0.3V (max at IO = 400µA). Its 3V-native I/O eliminates level shifters in most ARM Cortex-M and PIC32 designs.
LTC1864LIS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864LIS8#PBF FAQ
1.How can I place an order for LTC1864LIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LIS8#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 LTC1864LIS8#PBF reliable?
The price and inventory of LTC1864LIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LIS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864LIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LIS8#PBF?
LTC1864LIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LIS8#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 LTC1864LIS8#PBF?
For technical support, including LTC1864LIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LIS8#PBF requirements.
6.How does Aetrix verify that LTC1864LIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LIS8#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 LTC1864LIS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864LIS8#PBF?
All LTC1864LIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LIS8#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 LTC1864LIS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864LIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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