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Analog Devices Inc. LTC1864LIMS8#PBF
- Part No.:
- LTC1864LIMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864LIMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:743
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Product details
Overview
LTC1864LIMS8#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 MSOP-8 package - designed for high-precision, low-power data acquisition in portable instrumentation and isolated sensing systems.
For engineers reviewing the LTC1864LIMS8#PBF datasheet, LTC1864LIMS8#PBF pinout, LTC1864LIMS8#PBF application, or LTC1864LIMS8#PBF equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support tailored to OEM and embedded design workflows.
Technical Context
The LTC1864LIMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, operating exclusively on a single 2.7V–3.6V supply. Its conversion timing is fixed at 3.7–4.66µs, synchronized by external CONV and SCK signals, with no minimum data transfer rate requirement.
It uses a 3-wire SPI/MICROWIRE-compatible serial interface (CONV, SCK, SDO), supports external reference voltages from 1V to VCC, and achieves rail-to-rail input capability when IN– is grounded and VREF = VCC - enabling direct sensor interfacing without gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1:65,536 quantization granularity for precision measurement |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| Supply Current | 450µA typ at 150ksps; drops to 10µA at 1ksps via auto-shutdown - enables battery life extension |
| INL | ±8 LSB max - ensures monotonicity and <0.12% full-scale linearity error |
| SNR | 82dB - supports >13.3 effective number of bits (ENOB) in noise-sensitive applications |
| Reference Range | 1V to VCC - allows flexible scaling for ratiometric sensors or low-voltage references |
| Digital Interface | SPI/MICROWIRE 3-wire - simplifies host connection to MCU/DSP/ASIC with minimal GPIO usage |
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 to AGND |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance sampling node; paired with IN– for common-mode rejection |
| IN– (Pin 3) | Differential Analog Input (–) | Completes differential pair; enables rail-to-rail input when tied to GND |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; requires low-inductance PCB tie to analog plane |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; falling edge enables SDO output; high state triggers auto-shutdown |
| SDO (Pin 6) | Serial Data Output | 16-bit result shifted out MSB-first on SCK falling edge; Hi-Z when CONV high |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports DC–8MHz; no minimum clock rate required |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V single supply; requires local 1µF tantalum bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input | Rejects common-mode noise on IN+/IN– pair, enabling robust signal acquisition in noisy environments |
| Auto Shutdown | Reduces ICC from 450µA to 10µA at 1ksps - eliminates need for external power-gating logic |
| No Minimum Data Rate | Allows indefinite idle periods between conversions - ideal for event-triggered or burst-mode sensing |
| High Input Impedance | Enables direct connection to high-output-impedance sources (e.g., thermocouples, RTDs) without buffer op amps |
| Reduced Span Operation | Supports full-scale ranges as low as 1V - matches low-voltage sensor outputs and improves resolution utilization |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or battery-powered environmental sensor node acquiring voltage, temperature, or pressure. IC Role / Device Role / Timing Role: Primary 16-bit sampling ADC performing single-shot or periodic conversions triggered by microcontroller. Use Value: 450µA active current and 10µA sleep current extend battery life; differential input rejects EMI in unshielded enclosures. | Use Scenario: Industrial PLC module measuring field transmitters across galvanic isolation barriers. IC Role / Device Role / Timing Role: Isolated-side ADC digitizing analog sensor outputs before serial transmission across opto/isolator interface. Use Value: External reference support enables ratiometric accuracy; 82dB SNR preserves signal fidelity despite isolation-induced noise coupling. |
| Compact Signal Conditioning | Low-Power Remote Monitoring |
Use Scenario: Space-constrained medical device (e.g., wearable ECG front-end) requiring high-resolution analog capture. IC Role / Device Role / Timing Role: Precision ADC stage following programmable-gain amplifier (e.g., LTC6910-1), digitizing conditioned biopotential signals. Use Value: MSOP-8 footprint minimizes board area; 16-bit resolution captures subtle waveform features without oversampling. | Use Scenario: Wireless sensor network node monitoring pipeline pressure or tank level with multi-year battery life. IC Role / Device Role / Timing Role: Event-driven ADC activated only during wake-up intervals to digitize sensor output before RF transmission. Use Value: Auto-shutdown cuts average current to µA range; no-clock-idle mode eliminates timing overhead in ultra-low-duty-cycle operation. |
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 |
|---|---|---|---|
| LTC1864LCS8#PBF | Same silicon, commercial temperature grade (0°C to 70°C) vs. industrial (–40°C to 85°C) | Not rated for extended ambient or automotive under-hood environments | Select when operating within 0°C–70°C and cost sensitivity outweighs extended temp margin |
| AD7682BCPZ-RL7 | 16-bit, 250ksps, SPI interface, but requires external reference and has higher 1.3mA ICC at full speed | Lacks auto-shutdown; needs external power control for low-power operation | Choose for higher throughput where system-level power management compensates for higher base current |
Compared with LTC1864LIMS8#PBF, the LTC1864LCS8#PBF offers identical performance at lower cost in benign environments, while the AD7682BCPZ-RL7 trades higher speed and flexibility for increased power and design complexity - making LTC1864LIMS8#PBF optimal for compact, battery-conscious, industrial-grade systems.
Availability
LTC1864LIMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and compact signal conditioning requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LTC1864LIMS8#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 LTC1864LIMS8#PBF belongs to Linear Technology's legacy precision data acquisition product line, engineered specifically for low-power, high-resolution, single-supply SAR ADC applications in space- and energy-constrained systems.
FAQ
What is the operating temperature range of the LTC1864LIMS8#PBF?
The LTC1864LIMS8#PBF is rated for industrial temperature operation from –40°C to +85°C. This specification is confirmed in the Absolute Maximum Ratings table and applies across all electrical parameters unless otherwise noted. The "I" suffix in the part number explicitly denotes the industrial grade, distinguishing it from commercial (C) or automotive (A) variants.
Does the LTC1864LIMS8#PBF require an external reference voltage?
Yes, the LTC1864LIMS8#PBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports reference inputs from 1V to VCC, enabling ratiometric measurements or precision scaling. Unlike some ADCs with internal references, the LTC1864LIMS8#PBF relies entirely on this external source for full-scale definition and accuracy.
How does the auto-shutdown feature work in the LTC1864LIMS8#PBF?
The LTC1864LIMS8#PBF automatically enters low-current shutdown mode when the CONV pin remains high after conversion completion. At 1ksps, this reduces supply current from 450µA to 10µA. The feature is intrinsic to the IC's internal biasing and requires no configuration - it activates dynamically based on CONV timing, simplifying power management in intermittent-sampling systems.
Can the LTC1864LIMS8#PBF interface directly with a microcontroller's SPI peripheral?
Yes, the LTC1864LIMS8#PBF is SPI/MICROWIRE-compatible using a 3-wire interface (CONV, SCK, SDO). It operates without a chip select line - CONV serves as frame synchronization. The microcontroller must generate the CONV pulse and SCK edges; data is sampled on the rising SCK edge and output on the falling edge, matching standard SPI mode 0 timing.
What is the maximum clock frequency supported by the LTC1864LIMS8#PBF's SCK input?
The LTC1864LIMS8#PBF supports a maximum SCK frequency of 8MHz, as specified in the Recommended Operating Conditions table. This limit applies across the full industrial temperature range and ensures reliable setup/hold timing for SDI (not applicable here) and SDO timing parameters including tdDO (45–60ns), thDO (5–15ns), and SDO edge rates.
LTC1864LIMS8#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864LIMS8#PBF FAQ
1.How can I place an order for LTC1864LIMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LIMS8#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 LTC1864LIMS8#PBF reliable?
The price and inventory of LTC1864LIMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LIMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864LIMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LIMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LIMS8#PBF?
LTC1864LIMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LIMS8#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 LTC1864LIMS8#PBF?
For technical support, including LTC1864LIMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LIMS8#PBF requirements.
6.How does Aetrix verify that LTC1864LIMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LIMS8#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 LTC1864LIMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864LIMS8#PBF?
All LTC1864LIMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LIMS8#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 LTC1864LIMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864LIMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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