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Analog Devices Inc. LTC1864LAIMS8#PBF
- Part No.:
- LTC1864LAIMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864LAIMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,583
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Product details
Overview
LTC1864LAIMS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps single-channel differential 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 analog inputs (IN+, IN−), external reference pin (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and is optimized for high-precision, low-power data acquisition in portable instrumentation and isolated sensing systems.
For engineers reviewing the LTC1864LAIMS8#PBF datasheet, LTC1864LAIMS8#PBF pinout, LTC1864LAIMS8#PBF application, or LTC1864LAIMS8#PBF equivalent, this page delivers verified specifications including 16-bit resolution, ±8 LSB INL, 82 dB SNR, 150 kHz max sampling rate, and −40°C to +85°C industrial temperature grade - all confirmed for the exact MSOP-8 variant marked "LAI".
Technical Context
The LTC1864LAIMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input ranges from 0 V to VREF with full-scale spans adjustable down to 1 V. Its conversion cycle is initiated by a rising edge on CONV, completes in 3.7–4.66 µs, and automatically enters low-power sleep mode when CONV remains high post-conversion.
It uses a 3-wire serial interface (CONV, SCK, SDO) with data output on SDO's falling SCK edge and capture on the rising edge. The device requires no minimum data transfer rate, supports ratiometric operation, and accepts external references up to VCC while maintaining high-impedance analog inputs (±1 µA leakage) and 12 pF input capacitance in sample mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high dynamic range measurement |
| Max Sampling Rate | 150 ksps - enables real-time capture of signals up to ~20 kHz full-linear bandwidth |
| Supply Current | 450 µA typ at 150 ksps; drops to 10 µA at 1 ksps via auto-shutdown - critical for battery life |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% end-point linearity error over full scale |
| SNR | 82 dB - supports >13.3 effective number of bits (ENOB) for precision sensor digitization |
| Operating Temp | −40°C to +85°C - qualified for industrial environments without derating |
| Reference Range | 1 V to VCC (2.7–3.6 V) - allows flexible scaling for low-voltage signal sources |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0 mm × 3.0 mm × 0.86 mm body, 0.65 mm pitch, lead coplanarity ≤0.102 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | External reference input | Sets full-scale span; must be low-noise and bypassed with ≥1 µF to AGND |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance node; sampled simultaneously with IN− for common-mode rejection |
| IN− (Pin 3) | Differential analog input (−) | Accepts voltage from 0 V to VCC/2; defines zero-code point when equal to IN+ |
| GND (Pin 4) | Analog ground | Must connect directly to analog ground plane; serves as reference for all analog circuitry |
| CONV (Pin 5) | Convert control input | Rising edge starts conversion; low level enables SDO output; high level triggers auto-sleep |
| SDO (Pin 6) | Serial data output | 16-bit result shifted out MSB-first on falling SCK edge; tri-stated when CONV high |
| SCK (Pin 7) | Serial clock input | Synchronizes data transfer; supports up to 8 MHz clock frequency |
| VCC (Pin 8) | Positive supply | 2.7–3.6 V single supply; requires local 1 µF tantalum bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to fCM = 20 kHz full-linear bandwidth, enabling clean measurements in noisy environments |
| Auto-shutdown power management | Reduces ICC from 450 µA to 10 µA at 1 ksps - extends battery life in intermittent-sampling applications |
| Flexible reference support | Accepts external VREF from 1 V to VCC, allowing direct interfacing with low-voltage sensors without gain stages |
| No minimum data rate requirement | Eliminates need for continuous clocking; simplifies firmware and reduces EMI in burst-mode systems |
| Industrial temperature grade | Specified over −40°C to +85°C with guaranteed INL, SNR, and timing - suitable for uncontrolled enclosures |
Applications
| Portable Battery-Powered Instrumentation | Isolated Remote Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter or environmental sensor node logging temperature, pressure, and humidity with 16-bit resolution. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from precision op-amp front-ends; CONV-triggered sampling synchronizes with MCU wake-up cycles. Use Value: 450 µA active current and 10 µA sleep current enable >1-year battery life on two AA cells at 1-sample-per-second duty cycle. |
Use Scenario: Industrial field transmitter sending sensor data across galvanic isolation barrier to PLC or gateway. IC Role / Device Role / Timing Role: High-accuracy ADC upstream of digital isolator; differential inputs reject ground-loop noise induced across isolation gap. Use Value: ±8 LSB INL and 82 dB SNR ensure <0.02% measurement uncertainty even with 10 mVpp common-mode interference on sensor lines. |
| Compact Medical Monitoring | Low-Power Test & Measurement Equipment |
|
Use Scenario: Wearable ECG front-end acquiring biopotential signals with minimal amplification. IC Role / Device Role / Timing Role: Digitizes differential electrode pair (RA–LA) with rail-to-rail input capability when IN− grounded and VREF = VCC. Use Value: 1 V minimum reference support enables direct digitization of microvolt-level signals amplified only 100×, reducing noise contribution from gain stages. |
Use Scenario: Benchtop DMM or calibration source requiring stable, low-drift DC voltage measurement. IC Role / Device Role / Timing Role: Precision DC digitizer referenced to LT1460 2.5 V bandgap; low offset drift (<±2 mV) maintains accuracy over temperature. Use Value: 16-bit resolution and ±2 mV offset error allow detection of 38 µV changes in 2.5 V full-scale range - sufficient for 4½-digit display resolution. |
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 |
|---|---|---|---|
| AD7682BCPZ-RL7 | 16-bit, 250 ksps, 2.5 V internal reference; no external VREF pin; SPI-only interface; 10-lead LFCSP | Fixed reference simplifies layout but limits input span flexibility; higher speed suits faster control loops | Select when system uses fixed 2.5 V reference and requires >150 ksps sampling without external ref design complexity |
| LTC2311CDHC-14#PBF | 14-bit, 250 ksps, 3.3 V supply only; no auto-shutdown; 12-lead DFN; 79 dB SNR | Lower resolution and no sleep mode increase power and reduce dynamic range vs. LTC1864LAIMS8#PBF | Select when cost sensitivity outweighs need for 16-bit resolution and ultra-low sleep current in space-constrained designs |
Compared with AD7682BCPZ-RL7 and LTC2311CDHC-14#PBF, the LTC1864LAIMS8#PBF uniquely balances 16-bit precision, 150 ksps throughput, sub-µA sleep current, and external reference flexibility in a compact MSOP-8 - making it optimal for battery-powered, wide-input-range industrial sensors where layout area and energy per conversion are critical.
Availability
LTC1864LAIMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated remote sensing, and compact medical monitoring requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature performance.
Supply support for LTC1864LAIMS8#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 LTC1864L series belongs to ADI's precision data acquisition portfolio, designed specifically for low-power, high-resolution measurement in space- and energy-constrained systems where 16-bit accuracy must coexist with µA-level quiescent current.
FAQ
What is the maximum sampling frequency supported by the LTC1864LAIMS8#PBF?
The LTC1864LAIMS8#PBF supports a maximum sampling frequency of 150 ksps, with conversion time specified from 3.7 µs to 4.66 µs across temperature and supply conditions. This enables accurate digitization of input signals with up to ~20 kHz full-linear bandwidth while maintaining 82 dB SNR and ±8 LSB INL performance as guaranteed in the datasheet.
Does the LTC1864LAIMS8#PBF require an external reference voltage?
Yes, the LTC1864LAIMS8#PBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports reference voltages from 1 V to VCC (2.7–3.6 V), enabling flexible full-scale span configuration. Unlike some ADCs with internal references, the LTC1864LAIMS8#PBF relies entirely on this external reference for accuracy - so a stable, low-noise source like the LT1460DCS8-2.5 is recommended.
How does the auto-shutdown feature work on the LTC1864LAIMS8#PBF?
The LTC1864LAIMS8#PBF automatically enters low-power shutdown mode when the CONV pin remains high after conversion completion. At 1 ksps, this reduces supply current from 450 µA to just 10 µA. The feature eliminates the need for software-controlled power-down sequences, simplifying firmware and improving energy efficiency in duty-cycled applications such as periodic sensor polling.
What is the operating temperature range for the LTC1864LAIMS8#PBF?
The LTC1864LAIMS8#PBF is rated for operation from −40°C to +85°C, as indicated by the "I" suffix in its part number (LAI = −40°C to +85°C). All key specifications - including INL, SNR, offset error, and timing parameters - are guaranteed across this full industrial temperature range, ensuring reliable performance in uncontrolled environments.
Can the LTC1864LAIMS8#PBF interface directly with a microcontroller's SPI peripheral?
Yes, the LTC1864LAIMS8#PBF is SPI/MICROWIRE-compatible and interfaces directly with standard MCU SPI peripherals using three wires: CONV (as chip select), SCK (clock), and SDO (data out). It operates in master-in-slave-out (MISO) mode with data valid on the falling SCK edge and sampled on the rising edge - matching standard SPI Mode 0 timing requirements without additional logic.
LTC1864LAIMS8#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:
- -
LTC1864LAIMS8#PBF FAQ
1.How can I place an order for LTC1864LAIMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LAIMS8#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 LTC1864LAIMS8#PBF reliable?
The price and inventory of LTC1864LAIMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LAIMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864LAIMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LAIMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LAIMS8#PBF?
LTC1864LAIMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LAIMS8#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 LTC1864LAIMS8#PBF?
For technical support, including LTC1864LAIMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LAIMS8#PBF requirements.
6.How does Aetrix verify that LTC1864LAIMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LAIMS8#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 LTC1864LAIMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864LAIMS8#PBF?
All LTC1864LAIMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LAIMS8#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 LTC1864LAIMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864LAIMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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