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Analog Devices Inc. LTC1864AHMS8#TRPBF
- Part No.:
- LTC1864AHMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864AHMS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,652
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Product details
Overview
LTC1864AHMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with true differential analog inputs, adjustable reference input, and auto-shutdown power management. It operates on a single 5V supply, draws only 850μA at full speed, and guarantees operation from –40°C to +125°C in an 8-lead MSOP package. It is used in high-precision, low-power data acquisition systems where rail-to-rail input span and noise-immune sampling are required.
For engineers reviewing the LTC1864AHMS8#TRPBF datasheet, LTC1864AHMS8#TRPBF pinout, LTC1864AHMS8#TRPBF application, or LTC1864AHMS8#TRPBF equivalent, key selection criteria include guaranteed high-temperature operation (–40°C to +125°C), differential input architecture with 87dB SNR, SPI/MICROWIRE-compatible serial interface, and 2.75μs conversion time - all in a space-constrained MSOP-8 footprint.
Technical Context
The LTC1864AHMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, enabling precise 16-bit resolution at 250ksps while maintaining low power via automatic shutdown between conversions. Its differential input stage rejects common-mode noise, and the adjustable VREF pin supports external references from 1V to 5V for flexible full-scale range configuration.
It uses a 3-wire serial interface (CONV, SCK, SDO) with CONV-controlled timing: rising edge initiates conversion, falling edge enables data readout. The device outputs 16-bit data on SDO synchronized to SCK falling edges, compatible with standard microcontrollers, DSPs, and FPGAs without additional level-shifting.
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 acquisition of signals up to 125kHz bandwidth (Nyquist) |
| Supply Current | 850μA at 250ksps; drops to 2μA at 1ksps - enables battery-powered operation with adaptive power scaling |
| Signal-to-Noise Ratio | 87dB - ensures <1 LSB RMS noise floor for precision DC and low-frequency measurements |
| INL Error | ±8 LSB (H-grade) - maintains monotonicity and accuracy across full temperature range (–40°C to +125°C) |
| Conversion Time | 2.75μs (typ) - defines minimum inter-conversion interval and system throughput latency |
| Reference Range | 1V to VCC (5V) - allows direct interfacing with low-voltage sensors or ratiometric transducers |
Pinout & Package
Package: 8-lead plastic MSOP (3mm × 3mm), exposed pad optional, 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; accepts 1V–5V external reference; must be bypassed with ≥1μF to AGND |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; enables common-mode noise rejection |
| IN– (Pin 3) | Differential Analog Input (–) | Paired with IN+; zero code occurs when IN+ – IN– = 0V |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; requires low-inductance connection to analog plane |
| CONV (Pin 5) | Convert Control Input | Rising edge starts 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 falling SCK edges; tri-stated when CONV is high |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; max frequency 20MHz (H-grade); duty cycle 40%–60% |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1μF tantalum bypass to GND for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Inputs | Rejects common-mode noise up to full bandwidth; enables accurate measurement of small signals riding on large offsets |
| Auto Shutdown Mode | Reduces supply current from 850μA to 2μA at 1ksps - extends battery life in intermittent-sampling applications |
| H-Temperature Grade | Guaranteed 16-bit performance from –40°C to +125°C - suitable for automotive under-hood and industrial control environments |
| Adjustable Reference Span | Supports 1V–5V VREF - permits direct connection to low-voltage sensors or precision voltage references without gain stages |
| SPI/MICROWIRE Compatibility | 3-wire interface with no CS pin required - simplifies MCU/FPGA integration and reduces PCB routing complexity |
Applications
| Industrial Process Monitoring | Automotive Sensor Interface |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and flow transducers in PLC-based control cabinets operating at ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing differential bridge outputs with ratiometric reference tied to sensor excitation voltage. Use Value: 87dB SNR and ±8 LSB INL ensure sub-0.05% measurement accuracy over full industrial temperature range without calibration drift compensation. | Use Scenario: Front-end signal conditioning for exhaust gas oxygen (EGO) and knock sensors in engine control units (ECUs) deployed near hot engine blocks. IC Role / Device Role / Timing Role: High-temperature ADC acquiring fast transient events (e.g., knock detection pulses) with 250ksps sampling and 2.75μs conversion latency. Use Value: Guaranteed –40°C to +125°C operation and differential input structure reject EMI from ignition systems and alternators. |
| Portable Medical Instrumentation | Isolated Data Acquisition Systems |
Use Scenario: Battery-powered ECG and EEG monitors requiring ultra-low power consumption and high-resolution analog front ends. IC Role / Device Role / Timing Role: Low-power 16-bit ADC sampling biopotential signals with adjustable 1V–5V reference to match amplifier output swing. Use Value: 2μA sleep current at 1ksps and 850μA active current enable >100-hour runtime on coin-cell batteries during intermittent monitoring. | Use Scenario: Signal isolation in factory automation I/O modules using digital isolators (e.g., ADuM1401) between field-side sensors and controller-side processing. IC Role / Device Role / Timing Role: Isolated-side ADC converting analog sensor outputs before serial transmission across galvanic barrier via SPI-compatible interface. Use Value: 3-wire interface eliminates need for isolated chip select line; differential inputs reduce susceptibility to ground loop noise across isolation boundary. |
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 | Higher speed suits wideband applications; less suitable for ultra-low-power or high-temperature designs | Select when >250ksps sampling is needed and thermal environment stays below +85°C |
| MAX11100ETE+ | 16-bit, 250ksps, internal reference, but rated only to +85°C and lacks differential input flexibility | Internal reference simplifies BOM; limited temperature range excludes under-hood or harsh industrial use | Select for cost-sensitive consumer or lab equipment where extended temperature grade is unnecessary |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1864AHMS8#TRPBF uniquely combines guaranteed –40°C to +125°C operation, true differential inputs, and sub-1mA active current - making it the only option among the three qualified for high-reliability, thermally demanding embedded systems without external support circuitry.
Availability
LTC1864AHMS8#TRPBF is available at Aetrix Electronics and suitable for industrial process monitoring, automotive sensor interface, and portable medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1864AHMS8#TRPBF 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, formed through the acquisition of Linear Technology in 2017.
The LTC1864 series belongs to ADI's precision data acquisition product line, designed specifically for low-power, high-accuracy measurement in thermally demanding environments such as industrial control, automotive subsystems, and portable instrumentation.
FAQ
What is the maximum sampling rate supported by the LTC1864AHMS8#TRPBF?
The LTC1864AHMS8#TRPBF supports a maximum sampling rate of 250ksps at its H-grade temperature rating (–40°C to +125°C). This is confirmed in the Recommended Operating Conditions table, where fSMPL(MAX) is specified as 250kHz for the H-grade variant. At this rate, conversion time remains 2.75μs, enabling deterministic timing for real-time control loops.
Does the LTC1864AHMS8#TRPBF require an external reference voltage?
Yes, the LTC1864AHMS8#TRPBF requires an external reference voltage applied to the VREF pin. It accepts a reference from 1V to 5V and does not include an internal reference. This design allows ratiometric operation with sensor excitation sources or precision external references like the LT1021-5, ensuring optimal SNR and linearity without reference-related errors.
How does the auto-shutdown feature work in the LTC1864AHMS8#TRPBF?
The LTC1864AHMS8#TRPBF automatically enters low-power shutdown mode when the CONV pin remains high after conversion completion. In this state, supply current drops to 2μA at 1ksps sampling. Power resumes upon the next rising edge of CONV. This behavior is inherent to the device architecture and requires no configuration register writes - simplifying firmware implementation in battery-powered systems.
Can the LTC1864AHMS8#TRPBF interface directly with a microcontroller SPI port?
Yes, the LTC1864AHMS8#TRPBF is SPI/MICROWIRE-compatible and interfaces directly with standard MCU SPI peripherals. It uses a 3-wire protocol (CONV, SCK, SDO) with no chip select required. Data is clocked out MSB-first on the falling edge of SCK, and the receiving MCU should sample on the rising edge - matching standard SPI Mode 0 timing requirements without level shifters or glue logic.
What is the guaranteed integral nonlinearity (INL) specification for the LTC1864AHMS8#TRPBF over temperature?
The LTC1864AHMS8#TRPBF guarantees ±8 LSB integral nonlinearity over its full operating temperature range of –40°C to +125°C. This H-grade specification is explicitly listed in the Converter Characteristics table under "INL (H-Grade)" and ensures monotonic 16-bit performance without missing codes across extreme thermal conditions encountered in automotive and industrial deployments.
LTC1864AHMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- -
LTC1864AHMS8#TRPBF FAQ
1.How can I place an order for LTC1864AHMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864AHMS8#TRPBF 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 LTC1864AHMS8#TRPBF reliable?
The price and inventory of LTC1864AHMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864AHMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864AHMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864AHMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864AHMS8#TRPBF?
LTC1864AHMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864AHMS8#TRPBF 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 LTC1864AHMS8#TRPBF?
For technical support, including LTC1864AHMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864AHMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864AHMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864AHMS8#TRPBF 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 LTC1864AHMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864AHMS8#TRPBF?
All LTC1864AHMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864AHMS8#TRPBF, 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 LTC1864AHMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864AHMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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