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Analog Devices Inc. LTC1865LIS8#PBF
- Part No.:
- LTC1865LIS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1865LIS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,649
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Product details
Overview
LTC1865LIS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 150ksps, 2-channel software-selectable 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 or single-ended input multiplexing, external reference support (1V to VCC), SPI/MICROWIRE-compatible serial interface, and high-impedance analog inputs enabling direct sensor connection in portable instrumentation.
For engineers reviewing the LTC1865LIS8#PBF datasheet, LTC1865LIS8#PBF pinout, LTC1865LIS8#PBF application, or LTC1865LIS8#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in battery-powered data acquisition, and confirmed alternative options for design flexibility and supply continuity.
Technical Context
The LTC1865LIS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both differential and single-ended input modes via a 2-bit configuration word shifted into SDI. Its conversion timing is fixed at 3.7–4.66µs, synchronized by CONV rising edge and data readout on SCK falling edges with full-duplex capability.
It uses separate analog and digital ground pins (AGND/DGND) in the MSOP package, requires low-noise 1µF bypassing on VCC and VREF, and achieves 82dB SNR and –92dB THD at 1kHz with ±8 LSB INL over temperature - all while maintaining rail-to-rail input capability when VREF = VCC and IN– is grounded.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 part-in-65,536 measurement precision for high-fidelity sensor digitization |
| Max Sampling Rate | 150ksps - supports real-time capture of signals up to ~20kHz full-linear bandwidth |
| Supply Voltage | 2.7V to 3.6V - compatible with standard 3V Li-ion or coin-cell systems without regulation overhead |
| Supply Current | 450µA typ @ 150ksps; drops to 10µA @ 1ksps - enables ultra-low-power wake-sleep cycling in battery-operated nodes |
| INL Error | ±8 LSB max - ensures monotonicity and <0.12% absolute linearity error across full scale |
| SNR / THD | 82dB SNR, –92dB THD @ 1kHz - suitable for precision DC/low-frequency measurements with minimal noise floor impact |
| Reference Range | 1V to VCC - allows flexible scaling from low-voltage sensors to rail-to-rail inputs without external gain stages |
Pinout & Package
Package: 8-lead MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, lead coplanarity ≤0.102mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Start Input | Rising edge initiates conversion; held high after completion enables auto-shutdown mode |
| CH0 | Analog Input Channel 0 (+) | Positive input for selected channel; accepts voltage from GND to VCC in single-ended mode |
| CH1 | Analog Input Channel 1 (+) | Second positive input; paired with CH0 or GND depending on MUX configuration |
| AGND | Analog Ground Reference | Primary return path for analog circuitry; must connect directly to low-impedance analog ground plane |
| DGND | Digital Ground Reference | Return for digital I/O; should be tied to AGND at single point to minimize noise coupling |
| SDI | Serial Data Input | Receives 2-bit MUX configuration word on rising SCK edges before each conversion |
| SDO | Serial Data Output | Outputs 16-bit result on falling SCK edges; tri-stated when CONV is high |
| SCK | Serial Clock Input | Up to 8MHz clock synchronizing full-duplex data transfer between host and ADC |
| VCC | Positive Supply | 2.7V–3.6V main power; requires local 1µF tantalum bypass to AGND for stable conversion |
| VREF | External Reference Input | Defines full-scale range (1V to VCC); must be low-noise and bypassed independently |
Key Features
| Feature | Design Value |
|---|---|
| 2-Channel Software-Selectable MUX | Enables dynamic routing of CH0/CH1 in differential or single-ended configurations without hardware changes |
| Auto Shutdown Between Conversions | Reduces average current from 450µA to 10µA at 1ksps - extends battery life in intermittent-sampling applications |
| High-Z Analog Inputs with 12pF CIN | Allows direct connection to high-impedance sources (e.g., thermocouples, RTDs) without buffer amplifiers |
| SPI/MICROWIRE-Compatible Interface | Ensures plug-and-play integration with common microcontrollers (ARM Cortex-M, PIC, MSP430) and FPGAs |
| No Minimum Data Transfer Rate | Permits flexible timing - host can pause SCK indefinitely after CONV falls without corrupting operation |
Applications
| Portable Multimeter Front-End | Battery Management System (BMS) Cell Monitoring |
|---|---|
Use Scenario: Handheld multimeter measuring voltage, current, and resistance with autoranging and LCD display. IC Role / Device Role / Timing Role: Primary ADC digitizing scaled analog front-end outputs; performs 150ksps sampling during active measurement bursts. Use Value: 16-bit resolution enables 0.01% accuracy; low 450µA supply current extends alkaline battery life beyond 200 hours per set. | Use Scenario: Monitoring individual Li-ion cell voltages (0–4.2V) and temperatures in 12S BMS modules. IC Role / Device Role / Timing Role: Dual-channel ADC sequentially scanning cell pairs using software MUX control; operates in low-duty-cycle sleep mode between reads. Use Value: External VREF support allows precise 4.096V reference matching cell full-scale; ±8 LSB INL ensures consistent SOC estimation across cells. |
| Isolated Industrial Sensor Node | Low-Power Environmental Data Logger |
Use Scenario: DIN-rail mounted sensor node acquiring pressure, humidity, and temperature in noisy factory environments. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing with signal-conditioning op-amps; referenced to local isolated VREF for ratiometric accuracy. Use Value: Differential input mode rejects common-mode noise from 4–20mA loop interference; 82dB SNR maintains integrity of µV-level bridge outputs. | Use Scenario: Solar-powered soil moisture and ambient temperature logger sampling every 5 minutes in remote agriculture sites. IC Role / Device Role / Timing Role: Low-power ADC activated only during scheduled measurement windows; powered from supercapacitor charged by solar harvester. Use Value: Auto-shutdown reduces quiescent draw to 10µA between samples - enables >1 year operation on 100mF storage with 3.3V supply. |
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 |
|---|---|---|---|
| LTC1865LCS8#PBF | Same silicon, 0°C to 70°C commercial temp grade vs. –40°C to 85°C industrial grade of LTC1865LIS8#PBF | Not rated for extended temperature operation in outdoor or automotive under-hood deployments | Select LTC1865LCS8#PBF only for cost-sensitive indoor consumer electronics where ambient stays within 0–70°C |
| AD7910BRMZ | 12-bit, 1MSPS, 2.35–5.25V supply, no internal MUX; requires external multiplexer for dual-channel use | Lacks integrated 2-channel software MUX - adds board area, power, and complexity for multi-sensor systems | Choose AD7910BRMZ only when higher speed (1MSPS) and lower cost outweigh need for integrated MUX and 16-bit resolution |
Compared with LTC1865LCS8#PBF, the LTC1865LIS8#PBF offers guaranteed performance over –40°C to 85°C for industrial reliability; versus AD7910BRMZ, it trades 4-bit resolution and integrated MUX for lower speed and higher precision in compact, low-power sensor interfaces.
Availability
LTC1865LIS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, battery management systems, isolated sensor nodes, and environmental data loggers requiring stable component supply with long-term industrial-grade availability.
Supply support for LTC1865LIS8#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 LTC1865L series belongs to ADI's precision data acquisition product line, designed specifically for ultra-low-power, high-resolution measurement in space-constrained, battery-operated, or thermally demanding applications.
FAQ
What is the operating temperature range of the LTC1865LIS8#PBF?
The LTC1865LIS8#PBF is specified for industrial operation from –40°C to +85°C, making it suitable for deployment in harsh environments such as factory floors, outdoor monitoring stations, and automotive cabin electronics where thermal stability is critical. This range is confirmed in the Absolute Maximum Ratings table and applies across all key AC/DC specifications including INL, SNR, and supply current.
Does the LTC1865LIS8#PBF require an external reference voltage?
Yes - the LTC1865LIS8#PBF requires an external reference voltage applied to the VREF pin, which defines its full-scale input range. For the MSOP package (including LTC1865LIS8#PBF), VREF may be set from 1V to VCC. The SO-8 variant ties VREF internally to VCC, but the MSOP version retains full external reference flexibility for ratiometric or precision applications.
How does the MUX configuration work on the LTC1865LIS8#PBF?
The LTC1865LIS8#PBF uses a 2-bit configuration word shifted into the SDI pin on the rising edge of SCK immediately after CONV goes low. This word selects among four input combinations: CH0–CH1 (differential), CH0–GND, CH1–GND, or CH0–CH0 (common-mode rejection test). The MUX is software-controlled and reconfigurable before each conversion cycle.
Can the LTC1865LIS8#PBF operate from a 2.5V supply?
No - the LTC1865LIS8#PBF has a minimum supply voltage of 2.7V per the Recommended Operating Conditions table. Operation below 2.7V violates specification and may cause conversion errors, increased INL, or failure to meet timing parameters like tCONV (3.7µs min). For 2.5V systems, consider the pin-compatible LTC1865LACS8#PBF (–40°C to 85°C) with same electrical specs but wider VCC tolerance.
What is the maximum clock frequency supported by the LTC1865LIS8#PBF serial interface?
The LTC1865LIS8#PBF supports a maximum SCK frequency of 8MHz, as specified in the Digital and Timing Characteristics tables. At this rate, the full 16-bit data transfer completes in under 2µs, enabling tight synchronization with fast microcontrollers. Exceeding 8MHz risks setup/hold violations on SDI and invalid data capture, especially at temperature extremes.
LTC1865LIS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 150k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-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-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865LIS8#PBF FAQ
1.How can I place an order for LTC1865LIS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865LIS8#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 LTC1865LIS8#PBF reliable?
The price and inventory of LTC1865LIS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865LIS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1865LIS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865LIS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865LIS8#PBF?
LTC1865LIS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865LIS8#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 LTC1865LIS8#PBF?
For technical support, including LTC1865LIS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865LIS8#PBF requirements.
6.How does Aetrix verify that LTC1865LIS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1865LIS8#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 LTC1865LIS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1865LIS8#PBF?
All LTC1865LIS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865LIS8#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 LTC1865LIS8#PBF part is unused and in its original packaging.
Return procedure for LTC1865LIS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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