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Analog Devices Inc. LTC1864LAIMS8#TRPBF
- Part No.:
- LTC1864LAIMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864LAIMS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,365
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Product details
Overview
LTC1864LAIMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps single-channel differential successive approximation ADC operating on a single 3V supply in an 8-lead MSOP package. It features true differential analog inputs (IN+, IN–), external reference pin (VREF), auto-shutdown reducing supply current to 10µA at 1ksps, and SPI/MICROWIRE-compatible 3-wire serial interface. It is used in high-precision, low-power data acquisition systems requiring rail-to-rail input capability with external reference flexibility.
For engineers reviewing the LTC1864LAIMS8#TRPBF datasheet, LTC1864LAIMS8#TRPBF pinout, LTC1864LAIMS8#TRPBF application, or LTC1864LAIMS8#TRPBF equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in isolated instrumentation and portable sensing, and validated alternative options for design continuity and sourcing resilience.
Technical Context
The LTC1864LAIMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input operation where full-scale output corresponds to VREF – 1LSB. Its conversion timing is fixed at 3.7–4.66µs, synchronized by the rising edge of CONV and data readout via SDO on falling SCK edges.
It operates across –40°C to +85°C (industrial grade), draws only 450µA typical at 150ksps, and supports reference voltages from 1V to VCC. The device powers down automatically between conversions and enables SDO only when CONV is low - a deterministic control sequence critical for low-noise, low-power embedded sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = VREF/65536 quantization step for high dynamic range measurements |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| Supply Current | 450µA typ @ 150ksps; drops to 10µA @ 1ksps - enables battery-powered operation for >1 year in duty-cycled systems |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% end-point linearity error over full scale |
| SNR | 82dB - supports >13.3 effective number of bits (ENOB) for precision sensor interfacing |
| Reference Range | 1V to VCC - allows direct connection to low-voltage references or ratiometric sensor bridges without gain stages |
| Digital Interface | SPI/MICROWIRE 3-wire - minimal GPIO usage; no minimum clock rate required for compatibility with slow microcontrollers |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, exposed pad not present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; must be low-noise and bypassed to GND with ≥1µF capacitor; supports 1V–3.6V range |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts (GND – 0.05V) to (VCC + 0.05V) |
| IN– (Pin 3) | Differential Analog Input (–) | Paired with IN+; common-mode rejection enables noise-immune measurement of small differential signals |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; must connect directly to analog ground plane with minimal trace length |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; held high after completion enters sleep mode; falling edge enables SDO output |
| 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; supports DC to 8MHz; no minimum frequency requirement |
| VCC (Pin 8) | Positive Supply | Single 2.7V–3.6V supply; requires local 1µF tantalum bypass to GND for stable conversion performance |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise up to 20kHz bandwidth; enables direct connection to bridge sensors and isolated amplifiers |
| Auto Shutdown Between Conversions | Reduces average current from 450µA to ≤10µA at low sampling rates - extends battery life in portable instrumentation |
| External Reference Flexibility | Accepts 1V–VCC reference voltage - supports ratiometric designs, low-voltage references, and variable-span signal conditioning |
| No Minimum Data Transfer Rate | Allows ultra-slow microcontroller polling (e.g., 1Hz SCK) without timing violation - simplifies firmware and reduces EMI |
| 16-Bit Upgrade Path | PIN-compatible with 12-bit LTC1860L/LTC1861L - enables resolution upgrade without PCB redesign |
Applications
| High-Speed Portable Instrumentation | Isolated Remote Sensor Nodes |
|---|---|
Use Scenario: Handheld multimeter or battery-powered vibration analyzer acquiring 16-bit waveforms at 100ksps. IC Role / Device Role / Timing Role: Primary sampling ADC with differential input rejecting power-supply ripple and EMI during field measurements. Use Value: 450µA supply current at full speed enables >12-hour runtime on two AA cells; 82dB SNR ensures accurate RMS calculation of noisy mechanical signals. | Use Scenario: Industrial temperature monitor using thermocouple + cold-junction compensation, located 10m from controller across opto-isolated link. IC Role / Device Role / Timing Role: Local ADC digitizing conditioned thermocouple voltage before isolation barrier; external VREF tied to precision bandgap. Use Value: True differential input rejects ground-loop noise; 1V–3.6V VREF range allows matching reference to isolated supply rail, eliminating level-shifting errors. |
| Low-Power Battery-Operated Sensors | Compact Signal Conditioning Front-Ends |
Use Scenario: Wireless environmental node measuring soil moisture and pH with 16-bit resolution, transmitting once per minute. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during measurement burst; sleeps between samples to minimize quiescent draw. Use Value: Auto-shutdown cuts current to 10µA at 1ksps-equivalent duty cycle - contributes <1µA average system load, enabling 5-year coin-cell operation. | Use Scenario: Medical patch sensor with LT6015 front-end amplifier driving differential input of LTC1864LAIMS8#TRPBF for ECG waveform digitization. IC Role / Device Role / Timing Role: Final-stage ADC in analog signal chain; accepts ±100mV differential output from instrumentation amp. Use Value: High input impedance and 12pF CIN prevent loading of sensitive op-amp stage; 16-bit resolution captures subtle ST-segment variations without oversampling. |
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 |
|---|---|---|---|
| LTC1864LIMS8 | Same silicon, –40°C to +85°C industrial temp grade but marked "LI" instead of "AI"; identical pinout, specs, and package | No functional difference; used interchangeably where extended temperature qualification is not required | Select LTC1864LAIMS8#TRPBF when AEC-Q200 or enhanced reliability screening is specified; otherwise LTC1864LIMS8 offers same performance at lower cost |
| AD7980BRMZ | 16-bit, 1MSPS, 7.4mW at full speed; uses pseudo-differential input (IN+ vs GND); no auto-shutdown; requires external reference | Higher speed and power; lacks differential input and autonomous power management - unsuitable for ultra-low-power or noise-sensitive differential sensing | Choose AD7980BRMZ only when sampling >150ksps is mandatory and system can accommodate higher supply current and single-ended topology |
Compared with LTC1864LIMS8, the LTC1864LAIMS8#TRPBF provides identical electrical performance but with tighter manufacturing controls for enhanced long-term stability; versus AD7980BRMZ, it trades raw speed for 98% lower active current and built-in differential noise rejection - making it optimal for precision, battery-constrained systems.
Availability
LTC1864LAIMS8#TRPBF is available at Aetrix Electronics and suitable for high-precision data acquisition, portable instrumentation, and isolated remote sensing requiring stable component supply, guaranteed long-term availability, and industrial-grade temperature performance.
Supply support for LTC1864LAIMS8#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, serving industrial, automotive, communications, and healthcare markets.
The LTC1864L series belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for low-power, high-resolution sampling in space- and energy-constrained embedded systems - emphasizing accuracy, simplicity, and robustness over feature bloat.
FAQ
What is the operating temperature range of the LTC1864LAIMS8#TRPBF?
The LTC1864LAIMS8#TRPBF is rated for operation from –40°C to +85°C (industrial grade), with storage temperature spanning –65°C to +150°C. This range is confirmed in the Absolute Maximum Ratings table and applies across all specified electrical parameters unless otherwise noted in footnotes.
Does the LTC1864LAIMS8#TRPBF require an external reference, or can it operate with VCC as reference?
The LTC1864LAIMS8#TRPBF requires an external reference applied to the VREF pin; it does not internally derive reference from VCC. Unlike the SO-8 version of LTC1865L, the MSOP-packaged LTC1864LAIMS8#TRPBF has no internal VREF tie - VREF must be supplied externally in the 1V to VCC range for proper full-scale definition.
Can the LTC1864LAIMS8#TRPBF interface directly with a microcontroller GPIO without level-shifting?
Yes - the LTC1864LAIMS8#TRPBF is fully compatible with 3V microcontrollers: VIH = 1.9V min and VIL = 0.45V max at VCC = 2.7V, and VOH/VOL meet standard 3V logic thresholds. Its 3-wire SPI interface requires no level-shifting when paired with 3V MCU I/O banks.
What is the maximum clock frequency supported on the SCK pin of the LTC1864LAIMS8#TRPBF?
The LTC1864LAIMS8#TRPBF supports SCK frequencies up to 8MHz, as specified in the Recommended Operating Conditions table. This allows reliable 16-bit readout in ≤2µs, well within the 3.7–4.66µs conversion time window - enabling tight timing margins even at maximum sampling rate.
How does the auto-shutdown feature of the LTC1864LAIMS8#TRPBF reduce system power consumption?
The LTC1864LAIMS8#TRPBF automatically enters low-current sleep mode (≤10µA) when CONV remains high after conversion completes. This eliminates static bias current between samples - for example, at 1ksps sampling, average current drops from 450µA to ~10µA, cutting total ADC power by >97% in duty-cycled applications.
LTC1864LAIMS8#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:
- 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#TRPBF FAQ
1.How can I place an order for LTC1864LAIMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864LAIMS8#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 LTC1864LAIMS8#TRPBF reliable?
The price and inventory of LTC1864LAIMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864LAIMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864LAIMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864LAIMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864LAIMS8#TRPBF?
LTC1864LAIMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864LAIMS8#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 LTC1864LAIMS8#TRPBF?
For technical support, including LTC1864LAIMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864LAIMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864LAIMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864LAIMS8#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 LTC1864LAIMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864LAIMS8#TRPBF?
All LTC1864LAIMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864LAIMS8#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 LTC1864LAIMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864LAIMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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