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Analog Devices Inc. LTC1860LIMS8#PBF
- Part No.:
- LTC1860LIMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860LIMS8#PBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,741
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Product details
Overview
LTC1860LIMS8#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, single-channel, differential-input successive approximation ADC operating on a single 3V supply. It delivers 150ksps sampling rate with only 450µA typical supply current, features auto shutdown (10µA at 1ksps), and uses SPI/MICROWIRE-compatible 3-wire serial I/O in an 8-lead MSOP package. It is designed for low-power, high-speed data acquisition in portable instrumentation.
For engineers reviewing the LTC1860LIMS8#PBF datasheet, LTC1860LIMS8#PBF pinout, LTC1860LIMS8#PBF application, or LTC1860LIMS8#PBF equivalent, key selection criteria include its true differential analog input range (0 to VREF), external reference support (1V to VCC), 72dB SNR, ±1 LSB INL, and MSOP-8 footprint compatibility with pin-matched 16-bit LTC1864L/LTC1865L upgrades.
Technical Context
The LTC1860LIMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its conversion cycle is initiated by a rising edge on CONV, completes in 3.7–4.66µs, and automatically enters sleep mode if CONV remains high - reducing current to ≤10µA at low sampling rates.
It supports ratiometric operation or external reference configurations, accepts analog inputs up to VCC + 0.05V on IN+, and maintains high-impedance inputs (±1µA leakage) with 12pF input capacitance in sample mode. The SDO output is tri-state controlled by CONV, enabling direct connection to shared serial buses without external logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precision measurement of small signal changes. |
| Max Sampling Rate | 150ksps - supports real-time monitoring of signals up to ~30kHz full-linear bandwidth. |
| Supply Current (150ksps) | 450µA typical - enables battery-powered operation for >1 year on a single CR2032 cell in duty-cycled systems. |
| INL | ±1 LSB - ensures monotonicity and <0.025% end-point linearity error across full temperature range. |
| SNR | 72dB - resolves signals buried 72dB below full-scale, equivalent to ~11.6 effective bits at DC–1kHz. |
| Analog Input Range | 0V to VREF differential - allows direct interfacing with bridge sensors or op-amp outputs without level-shifting. |
| Reference Range | 1V to VCC - supports flexible scaling from low-voltage sensor outputs up to rail-to-rail spans when VREF = VCC. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm × 0.86mm body, 0.65mm pitch, lead coplanarity ≤0.102mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; must be low-noise and bypassed with ≥1µF tantalum to AGND. |
| IN+ (Pin 2) | Differential Analog Input (+) | Accepts voltage up to VCC + 0.05V; sampled simultaneously with IN– for common-mode rejection. |
| IN– (Pin 3) | Differential Analog Input (–) | Accepts voltage down to –0.05V; differential pair enables noise-immune measurement of small ΔV. |
| GND (Pin 4) | Analog Ground | Single-point tie to analog ground plane; critical for achieving specified 72dB SNR performance. |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; falling edge enables SDO output and initiates serial readout. |
| SDO (Pin 6) | Serial Data Output | Tri-state output driven on SCK falling edge; high-impedance when CONV is high or after data transfer. |
| SCK (Pin 7) | Serial Clock Input | Accepts up to 8MHz clock; synchronizes 12-bit data shift-out and defines timing for tCONV and tSMPL. |
| VCC (Pin 8) | Positive Supply | 2.7V to 3.6V operation; requires local 1µF bypass to GND for stable conversion accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces ICC from 450µA @ 150ksps to ≤10µA @ 1ksps - eliminates need for external power-gating logic. |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair - enables accurate measurement in electrically noisy environments. |
| No minimum data transfer rate | Allows indefinite pause between SCK edges during readout - simplifies firmware timing and reduces CPU load. |
| High-impedance analog inputs | ±1µA leakage and 12pF input capacitance permit direct connection to high-Z sources (e.g., thermocouples, RTDs) with minimal loading. |
| Pin compatibility with 16-bit LTC1864L/LTC1865L | Enables drop-in resolution upgrade path without PCB redesign - same MSOP-8 footprint and pin functions. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
|
Use Scenario: Battery-powered handheld blood glucose meter acquiring analog output from electrochemical sensor. IC Role / Device Role / Timing Role: Precision 12-bit digitization of low-level mV-range sensor signals with ratiometric reference stability. Use Value: 450µA supply current extends battery life; differential input rejects EMI from display backlight and RF modules. |
Use Scenario: Remote 4–20mA loop-powered transmitter measuring temperature via RTD bridge. IC Role / Device Role / Timing Role: High-accuracy analog front-end digitizing bridge output with external 2.5V reference for ratio-metric calibration. Use Value: ±1 LSB INL ensures <0.025% measurement linearity over –40°C to 85°C; 1V–VCC reference flexibility supports varied loop supply voltages. |
| Isolated Data Acquisition Modules | Low-Power IoT Edge Nodes |
|
Use Scenario: DIN-rail mounted sensor node using digital isolator to separate field-side analog section from host MCU. IC Role / Device Role / Timing Role: Isolated-side ADC providing galvanically separated 12-bit measurements with minimal power draw. Use Value: Tri-state SDO enables clean serial bus sharing across multiple isolated channels; 10µA sleep current minimizes isolation barrier power loss. |
Use Scenario: Wireless environmental sensor node (LoRaWAN/NB-IoT) sampling soil moisture every 5 minutes. IC Role / Device Role / Timing Role: Ultra-low-power ADC activated only during brief wake-up windows to capture sensor voltage. Use Value: Auto shutdown cuts average current to sub-µA levels; no external enable circuitry required for duty-cycled operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, low-power, serial ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864LIMS8#PBF | 16-bit resolution, same 150ksps rate and MSOP-8 package; higher 78dB SNR but 650µA supply current. | Required where >12-bit precision is needed (e.g., high-resolution strain gauge systems); not suitable for ultra-low-power budget. | Select LTC1864LIMS8#PBF only when resolution gain justifies +200µA current penalty and layout supports same footprint. |
| ADS7822U | 12-bit, 200ksps, 2.7–5.25V supply; SPI interface but no auto shutdown - 1.2mA active current, no sleep mode. | Better speed for cost-sensitive industrial PLCs; lacks power optimization for battery use. | Choose ADS7822U for fixed-line-powered systems needing marginally higher throughput without sleep management complexity. |
Compared with LTC1860LIMS8#PBF, LTC1864LIMS8#PBF offers 4-bit resolution uplift at +44% supply current, while ADS7822U trades 50ksps speed for 2.7× higher active power and no autonomous power gating - making LTC1860LIMS8#PBF optimal for energy-constrained, precision-sufficient designs.
Availability
LTC1860LIMS8#PBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, isolated data acquisition modules, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term sourcing.
Supply support for LTC1860LIMS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing ICs for precision measurement and control.
The LTC1860LIMS8#PBF belongs to Linear's µPower SAR ADC family, engineered specifically for compact, battery-operated instrumentation where high resolution must coexist with ultra-low quiescent current and minimal board area.
FAQ
What is the operating temperature range for the LTC1860LIMS8#PBF?
The LTC1860LIMS8#PBF is rated for operation from –40°C to +85°C (industrial grade). This is confirmed by the "I" suffix in the part number and the LTC1860LI specification column in the datasheet, which defines all electrical parameters over this full range - including ±1 LSB INL and 450µA supply current at 150ksps.
Does the LTC1860LIMS8#PBF require an external reference, or can it operate ratiometrically?
The LTC1860LIMS8#PBF supports both modes: it accepts an external reference voltage (1V to VCC) on the VREF pin for absolute accuracy, or can be used ratiometrically by tying VREF to the same source as the analog signal - e.g., the excitation voltage of a bridge sensor. Ratiometric operation eliminates reference drift errors and simplifies calibration.
How does the auto shutdown feature work on the LTC1860LIMS8#PBF?
When CONV is held high after conversion completion, the LTC1860LIMS8#PBF automatically powers down its internal circuitry, reducing supply current to ≤10µA at 1ksps. This occurs without software intervention or external control signals - the device self-manages power state based solely on CONV pin level and sampling frequency.
Can the LTC1860LIMS8#PBF interface directly with a microcontroller GPIO without level-shifting?
Yes - the LTC1860LIMS8#PBF digital I/O (CONV, SCK, SDO) is fully compatible with 3V logic families. VIH is 1.9V min at VCC = 3.3V, and VOL is 0.3V max at 400µA sink, ensuring robust interfacing with standard 3V MCUs like STM32L4 or MSP430FRxx without level translation.
Is the LTC1860LIMS8#PBF pin-compatible with any higher-resolution alternatives?
Yes - the LTC1860LIMS8#PBF is explicitly pin-compatible with the 16-bit LTC1864LIMS8#PBF and LTC1865LIMS8#PBF in the same MSOP-8 package. Pin functions, layout, and power/ground connections match exactly, enabling resolution upgrades without PCB revision.
LTC1860LIMS8#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:
- 12
- Sampling Rate (Per Second):
- 150k
- Number of Inputs:
- 1
- Input Type:
- Differential, 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:
- 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:
- -
LTC1860LIMS8#PBF FAQ
1.How can I place an order for LTC1860LIMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LIMS8#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 LTC1860LIMS8#PBF reliable?
The price and inventory of LTC1860LIMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LIMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1860LIMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LIMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LIMS8#PBF?
LTC1860LIMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LIMS8#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 LTC1860LIMS8#PBF?
For technical support, including LTC1860LIMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LIMS8#PBF requirements.
6.How does Aetrix verify that LTC1860LIMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LIMS8#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 LTC1860LIMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1860LIMS8#PBF?
All LTC1860LIMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LIMS8#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 LTC1860LIMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1860LIMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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