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Analog Devices Inc. LTC1864HMS8#PBF
- Part No.:
- LTC1864HMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864HMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
LTC1864HMS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps single-channel differential successive approximation ADC in an 8-lead MSOP package, operating from a single 5V supply with 850μA typical supply current at full speed and auto-shutdown to 2μA at 1ksps. It features true differential analog inputs (IN+, IN–), adjustable external reference (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and guaranteed operation from –40°C to +125°C - ideal for high-precision, low-power industrial sensor interfaces and isolated data acquisition systems.
For engineers reviewing the LTC1864HMS8#PBF datasheet, LTC1864HMS8#PBF pinout, LTC1864HMS8#PBF application, or LTC1864HMS8#PBF equivalent, key selection criteria include its H-grade temperature range, differential input architecture, 87dB SNR, 2.75μs conversion time, and compatibility with ratiometric or external reference configurations in compact, battery-sensitive designs.
Technical Context
The LTC1864HMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit conversion without external support circuitry. Its differential input stage rejects common-mode noise, while the adjustable VREF pin allows full-scale spans from 1V to 5V - supporting direct connection to low-output-impedance sensors and eliminating gain stages in many signal chains.
Control is managed via a single CONV input that initiates conversion on the rising edge and enables SDO output on the falling edge; serial data is clocked out on SCK falling edges with synchronous capture on rising edges. The device automatically powers down between conversions, reducing current consumption proportionally with sampling rate - a critical feature for energy-constrained embedded instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high dynamic range measurement |
| Max Sampling Rate | 250ksps - supports real-time monitoring of fast transients up to ~125kHz full-linear bandwidth |
| Supply Current | 850μA typ at 250ksps; drops to 2μA at 1ksps - enables multi-year battery life in portable instruments |
| Signal-to-Noise Ratio | 87dB - ensures ≤0.0002% RMS noise floor relative to full scale for precision DC/low-frequency sensing |
| Integral Nonlinearity | ±8 LSB max (H-grade) - guarantees monotonicity and <0.12% end-point error across full temperature range |
| Conversion Time | 2.75μs typ - defines minimum inter-conversion interval and maximum achievable throughput |
| Reference Range | 1V to VCC (5V) - permits flexible scaling for 1V–5V sensor outputs without external amplifiers |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm, exposed pad not present, θJA = 210°C/W, rated for –40°C to +125°C operation.
| 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 0V to VCC range |
| IN– (Pin 3) | Differential Analog Input (–) | Common-mode rejection enabled when paired with IN+; grounded for unipolar rail-to-rail mode |
| GND (Pin 4) | Analog Ground | Primary return for analog circuitry; requires low-inductance connection to analog ground plane |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; falling edge enables SDO and enters sample mode |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI/MICROWIRE-compatible output; data valid on SCK falling edge |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports up to 20MHz clock (H-grade) |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1μF tantalum bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces supply current from 850μA to 2μA at 1ksps - eliminates need for external power gating logic |
| True differential input architecture | Rejects common-mode noise up to full bandwidth - critical for noisy industrial environments |
| Adjustable reference input (1V–5V) | Enables direct interface with 1V–5V-output sensors (e.g., bridge transducers, RTDs) without gain stages |
| H-grade temperature rating (–40°C to +125°C) | Guarantees full specification compliance in under-hood, motor control, and downhole applications |
| SPI/MICROWIRE™-compatible interface | Interoperates with standard microcontroller peripherals - no custom driver development required |
Applications
| Industrial Sensor Interface | Isolated Data Acquisition |
|---|---|
Use Scenario: Monitoring strain gauge outputs in hydraulic pressure transducers within factory automation PLC modules. IC Role / Device Role / Timing Role: Precision 16-bit digitization of low-level mV-range differential signals with 87dB SNR and 125kHz linear bandwidth. Use Value: Eliminates external instrumentation amplifier and reference buffer, reducing BOM count and board area by 30% versus 12-bit alternatives. | Use Scenario: Digitizing thermocouple outputs in explosion-proof field transmitters with galvanic isolation. IC Role / Device Role / Timing Role: Low-power, high-accuracy ADC placed on isolated analog side; communicates via opto-coupled SPI lines. Use Value: 2μA sleep current extends isolated-side battery life to >10 years in wireless sensor nodes. |
| Portable Medical Instrumentation | Motor Control Feedback |
Use Scenario: ECG front-end signal chain in handheld diagnostic devices requiring FDA-compliant accuracy. IC Role / Device Role / Timing Role: Differential acquisition of biopotential signals with common-mode rejection and programmable gain-free scaling. Use Value: 1V–5V VREF flexibility allows matching to low-noise LDO outputs, improving PSRR by 20dB over fixed-reference ICs. | Use Scenario: Position feedback from resolvers or Hall-effect sensors in servo drives operating at 125°C ambient. IC Role / Device Role / Timing Role: High-temperature-stable ADC capturing rotor position data at 250ksps for field-oriented control loops. Use Value: Guaranteed ±8 LSB INL at +125°C ensures <0.12% angular error - meeting IEC 61800-3 functional safety requirements. |
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, but requires external reference and has higher 1.5mA supply current at full speed | Targeted at higher-speed data loggers; lacks auto-shutdown and H-grade temp support | Select when sampling rate >250ksps is mandatory and thermal margin >125°C is unnecessary |
| MAX11100ETE+ | 16-bit, 250ksps, internal reference, but only rated to +85°C and uses different pinout (10-pin TDFN) | Designed for cost-sensitive consumer test equipment; no extended temperature qualification | Select for commercial-grade applications where footprint and internal reference simplify layout |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1864HMS8#PBF uniquely combines H-grade temperature operation, ultra-low sleep current (2μA), and differential input architecture in an industry-standard 8-pin MSOP - making it the only option qualified for harsh-environment, long-life, low-power industrial deployments.
Availability
LTC1864HMS8#PBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated data acquisition systems, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1864HMS8#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 LTC1864HMS8#PBF belongs to ADI's legacy Linear Technology precision data acquisition product line, engineered specifically for low-power, high-accuracy, extended-temperature industrial and instrumentation applications where reliability and parametric stability are non-negotiable.
FAQ
What is the maximum sampling frequency of the LTC1864HMS8#PBF?
The LTC1864HMS8#PBF achieves a maximum sampling frequency of 250ksps under H-grade conditions (–40°C to +125°C), with a typical conversion time of 2.75μs. This performance is maintained across the full temperature range and is specified with VCC = 5V, VREF = 5V, and fSCK ≤ 20MHz. At lower sampling rates, the device automatically reduces supply current to conserve power.
Does the LTC1864HMS8#PBF require an external reference voltage?
No, the LTC1864HMS8#PBF does not require an external reference - it accepts an adjustable reference input (VREF) ranging from 1V to 5V, which can be supplied by an external precision source or derived from VCC. Unlike some ADCs, it contains no internal reference; the VREF pin directly sets full-scale range, enabling ratiometric measurements and flexible scaling for diverse sensor outputs.
How does the CONV pin function in the LTC1864HMS8#PBF?
The CONV pin in the LTC1864HMS8#PBF serves dual functions: a rising edge initiates conversion, and a falling edge enables the SDO output and places the device in sample mode. If left high after conversion completes, the LTC1864HMS8#PBF enters auto-shutdown mode, drawing only leakage current (~2μA at 1ksps). This eliminates the need for external power sequencing logic.
What is the guaranteed integral nonlinearity (INL) specification for the LTC1864HMS8#PBF?
The LTC1864HMS8#PBF guarantees an integral nonlinearity (INL) of ±8 LSB maximum over its full operating temperature range (–40°C to +125°C), as specified for the H-grade version. This ensures monotonic behavior and end-point accuracy better than 0.12% of full scale - critical for closed-loop control and calibration-critical instrumentation where code missing or major carry errors are unacceptable.
Can the LTC1864HMS8#PBF operate with a 3.3V supply?
No, the LTC1864HMS8#PBF is specified for single-supply operation from 4.75V to 5.25V only. Its absolute maximum VCC rating is 7V, but the internal circuitry - including reference buffer and SAR core - is optimized for 5V nominal operation. Using 3.3V violates recommended operating conditions and will result in undefined performance, failed conversions, or potential damage due to insufficient headroom for internal biasing.
LTC1864HMS8#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:
- Single Ended
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864HMS8#PBF FAQ
1.How can I place an order for LTC1864HMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864HMS8#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 LTC1864HMS8#PBF reliable?
The price and inventory of LTC1864HMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864HMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864HMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864HMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864HMS8#PBF?
LTC1864HMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864HMS8#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 LTC1864HMS8#PBF?
For technical support, including LTC1864HMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864HMS8#PBF requirements.
6.How does Aetrix verify that LTC1864HMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864HMS8#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 LTC1864HMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864HMS8#PBF?
All LTC1864HMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864HMS8#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 LTC1864HMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864HMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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