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Analog Devices Inc. LTC1864AIS8#TRPBF
- Part No.:
- LTC1864AIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1864AIS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,878
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Product details
Overview
LTC1864AIS8#TRPBF 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 input (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and guaranteed operation from –40°C to +85°C - ideal for portable instrumentation and isolated data acquisition systems.
For engineers reviewing the LTC1864AIS8#TRPBF datasheet, LTC1864AIS8#TRPBF pinout, LTC1864AIS8#TRPBF application, or LTC1864AIS8#TRPBF equivalent, this page delivers verified technical context, exact pin functions, real-world use cases, and validated alternative options - all grounded in the official LTC1864/LTC1865 datasheet (18645fb) and Linear/Analog Devices product documentation.
Technical Context
The LTC1864AIS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input ranges from 0V to VREF with 1V minimum full-scale span. Its conversion cycle is initiated by a rising edge on CONV, completes in ≤3.3μs (H-grade), and automatically enters low-power sleep mode when CONV remains high post-conversion.
Digital communication uses a 3-wire SPI-compatible interface: SCK synchronizes data transfer, SDO outputs 16-bit results on SCK falling edges, and CONV doubles as chip select and data-enable control - with SDO enabled only when CONV is low. The device accepts external references from 1V to 5V and supports ratiometric operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision measurement of small signal changes. |
| Max Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz full-linear bandwidth (S/(N+D) ≥ 75dB). |
| Supply Current | 850μA typ at 250ksps; drops to 2μA at 1ksps - enables battery-powered operation with dynamic power scaling. |
| INL Error | ±6.5 LSB max (A-grade) - ensures monotonicity and accurate end-point linearity over temperature. |
| SNR | 87dB - supports >14-bit effective resolution in noise-sensitive applications like sensor front-ends. |
| Input Range | Differential 0V to VREF (1V–5V) - allows direct connection to transducer outputs without gain stages. |
| Reference Input | VREF pin accepts externally supplied reference - enables flexible scaling and ratiometric measurements with bridge sensors. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm, 0.65mm pitch, exposed pad not present. Thermal resistance θJA = 210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale range; must be bypassed with ≥1μF to AGND; supports 1V–5V external references. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; rejects common-mode noise. |
| IN– (Pin 3) | Differential Analog Input (–) | Paired with IN+; zero code occurs when IN+ – IN– = 0V; enables true differential measurement. |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; must connect directly to analog ground plane. |
| CONV (Pin 5) | Convert Control / Data Enable | Rising edge starts conversion; low state enables SDO output; high state after conversion triggers auto-sleep. |
| SDO (Pin 6) | Serial Data Output | Outputs 16-bit result MSB-first on SCK falling edges; tri-stated when CONV is high. |
| SCK (Pin 7) | Serial Clock Input | Drives synchronous data transfer; max frequency 20MHz (H-grade); defines timing for SDO output. |
| 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 |
|---|---|
| Auto shutdown between conversions | Reduces ICC from 850μA to 2μA at 1ksps - extends battery life in intermittent-sampling systems. |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair - critical for noisy industrial or motor-control environments. |
| Adjustable reference input (VREF) | Supports 1V–5V external references - enables optimized dynamic range for low-level sensor signals. |
| Guaranteed operation to +85°C | Validated performance across –40°C to +85°C ambient - suitable for industrial and automotive under-hood applications. |
| SPI/MICROWIRE™-compatible interface | 3-wire serial protocol with no CS pin required - simplifies MCU GPIO usage and reduces PCB routing complexity. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor logger powered by two AA batteries. IC Role / Device Role / Timing Role: Primary analog-to-digital converter digitizing differential thermocouple or pressure bridge outputs. Use Value: 16-bit resolution and 850μA active current enable >200-hour battery life while maintaining ±0.0015% measurement accuracy. | Use Scenario: Industrial PLC analog input module with galvanic isolation between field-side sensors and controller-side digital bus. IC Role / Device Role / Timing Role: Isolated-side ADC capturing sensor data before transmission across opto-coupled or transformer-isolated link. Use Value: Differential inputs reject ground-loop noise; low 2μA sleep current minimizes isolated-side power draw during idle periods. |
| Low-Power Sensor Interface | Compact Test Equipment |
Use Scenario: Wireless node measuring strain gauge output in structural health monitoring. IC Role / Device Role / Timing Role: Signal conditioning front-end ADC interfacing directly to Wheatstone bridge without op-amp amplification. Use Value: 1V minimum VREF support allows full-scale use of low-output bridges; high-Z inputs prevent loading errors. | Use Scenario: Benchtop oscilloscope auxiliary channel or automated test fixture digitizing analog waveforms. IC Role / Device Role / Timing Role: High-speed sampling ADC feeding FPGA-based waveform processing pipeline. Use Value: 250ksps rate captures 100kHz signals with 125kHz linear bandwidth; SPI interface enables tight timing control from logic analyzer or microcontroller. |
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 |
|---|---|---|---|
| ADS8325IDGSR | 16-bit, 100ksps, 2.7–5.5V supply, internal reference, SPI interface, MSOP-10 package | Lower speed, integrated reference, no external VREF flexibility; requires different PCB layout | Select when fixed 2.5V reference suffices and lower sampling rate is acceptable. |
| MAX11603EEE+ | 16-bit, 200ksps, 2.7–3.6V supply, internal reference, I²C interface, QSOP-16 package | Lower voltage operation, I²C instead of SPI, no external VREF, larger footprint | Choose for 3.3V-only systems where I²C bus sharing is preferred over SPI point-to-point. |
Compared with ADS8325IDGSR and MAX11603EEE+, the LTC1864AIS8#TRPBF offers higher 250ksps throughput, full 1V–5V external reference control, and lower active current - making it optimal for precision, battery-constrained, or ratiometric measurement designs requiring maximum flexibility.
Availability
LTC1864AIS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power sensor interface applications requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade (–40°C to +85°C).
Supply support for LTC1864AIS8#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 technologies, formed through the acquisition of Linear Technology in 2017.
The LTC1864AIS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for ultra-low-power, high-resolution measurement in space- and energy-constrained systems - emphasizing accuracy, thermal stability, and ease of integration.
FAQ
What is the maximum sampling rate of the LTC1864AIS8#TRPBF?
The LTC1864AIS8#TRPBF achieves a maximum sampling rate of 250ksps, with guaranteed performance across its specified temperature range (–40°C to +85°C). At this rate, the conversion time is ≤3.3μs, and full-linear bandwidth is 125kHz (S/(N+D) ≥ 75dB). This enables accurate digitization of signals up to 125kHz without aliasing or harmonic distortion degradation.
Does the LTC1864AIS8#TRPBF require an external reference voltage?
Yes, the LTC1864AIS8#TRPBF requires an external reference voltage applied to the VREF pin. It supports reference voltages from 1V to 5V, enabling flexible full-scale range selection and ratiometric operation with bridge sensors. Unlike some alternatives, it does not include an internal reference - ensuring design control over accuracy, temperature drift, and noise performance via external reference choice.
What is the function of the CONV pin on the LTC1864AIS8#TRPBF?
The CONV pin on the LTC1864AIS8#TRPBF serves dual functions: a rising edge initiates conversion, and its logic level controls power state and data output. When held high after conversion completion, the LTC1864AIS8#TRPBF enters auto-shutdown mode (ICC ≈ 2μA). When driven low, it enables the SDO pin to output the 16-bit result - eliminating the need for a separate chip-select signal in SPI communication.
Can the LTC1864AIS8#TRPBF operate from a 3.3V supply?
No, the LTC1864AIS8#TRPBF is specified for a single 4.75V to 5.25V supply only. Its absolute maximum VCC is 7V, but operation below 4.75V is not guaranteed per datasheet specifications. For 3.3V systems, consider alternatives such as the MAX11603EEE+ or ADS8325IDGSR - neither of which matches the LTC1864AIS8#TRPBF's 5V-native 250ksps performance and external VREF capability.
What package type is used for the LTC1864AIS8#TRPBF?
The LTC1864AIS8#TRPBF uses an 8-lead plastic MSOP (MS8) package, measuring 3mm × 3mm with 0.65mm lead pitch. This compact, surface-mount package supports high-density PCB layouts and has a thermal resistance (θJA) of 210°C/W. It is distinct from the SO-8 variant (e.g., LTC1864AIS8#TRPBF is MSOP; LTC1864AIS8#TRPBF is not SO-8) and requires appropriate land pattern per Linear Technology's MS8 footprint guidelines.
LTC1864AIS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- 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 ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864AIS8#TRPBF FAQ
1.How can I place an order for LTC1864AIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864AIS8#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 LTC1864AIS8#TRPBF reliable?
The price and inventory of LTC1864AIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864AIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864AIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864AIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864AIS8#TRPBF?
LTC1864AIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864AIS8#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 LTC1864AIS8#TRPBF?
For technical support, including LTC1864AIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864AIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864AIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864AIS8#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 LTC1864AIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864AIS8#TRPBF?
All LTC1864AIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864AIS8#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 LTC1864AIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864AIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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