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Analog Devices Inc. LTC1860LCMS8#PBF
- Part No.:
- LTC1860LCMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860LCMS8#PBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,557
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Product details
Overview
LTC1860LCMS8#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, 150ksps single-channel successive approximation ADC with true differential analog inputs, external reference pin, and SPI/MICROWIRE-compatible 3-wire serial interface. It operates from a single 2.7V–3.6V supply, draws only 450µA at full speed, and auto-shuts down between conversions to reduce current to 10µA at 1ksps. It is used in compact, battery-powered data acquisition systems requiring high resolution and low power.
For engineers reviewing the LTC1860LCMS8#PBF datasheet, LTC1860LCMS8#PBF pinout, LTC1860LCMS8#PBF application, or LTC1860LCMS8#PBF equivalent, key selection criteria include its MSOP-8 package, differential input architecture, 12-bit no-missing-codes performance, 72dB SNR, and compatibility with ratiometric or external reference designs - especially where space-constrained, low-quiescent-current sampling is required.
Technical Context
The LTC1860LCMS8#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 supports continuous sampling up to 150kHz with automatic power-down between cycles.
It features high-impedance analog inputs (±1µA leakage), 12pF input capacitance in sample mode, and supports full-scale spans from 1V to VREF (up to VCC). The external VREF pin enables flexible scaling, while the differential input rejects common-mode noise without requiring external amplification in many sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits with guaranteed no missing codes - ensures monotonic transfer function for precision control and measurement. |
| Sampling Rate | 150 ksps maximum - supports real-time acquisition of audio-band and industrial sensor signals. |
| Supply Current | 450 µA typical at 150 ksps; drops to 10 µA at 1 ksps - enables multi-year battery life in portable instrumentation. |
| INL Error | ±1 LSB over temperature - maintains end-point accuracy without calibration in closed-loop feedback systems. |
| SNR | 72 dB at 1 kHz - delivers >11.5 effective number of bits (ENOB) for high-fidelity signal digitization. |
| Input Range | Differential: 0 to VREF; absolute IN+ range: –0.05V to VCC + 0.05V - allows direct connection to transducers with minimal front-end circuitry. |
| Reference Input | VREF = 1V to VCC - supports ratiometric sensing with resistive bridges or low-voltage references like LT1460. |
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 voltage input | Defines full-scale span; must be low-noise and bypassed to AGND with ≥1µF tantalum capacitor. |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance node sampled simultaneously with IN–; accepts –0.05V to VCC + 0.05V. |
| IN– (Pin 3) | Differential analog input (–) | Common-mode rejection enabled when paired with IN+; valid range: –0.05V to VCC/2. |
| GND (Pin 4) | Analog ground | Must connect directly to analog ground plane with minimal trace length to minimize noise coupling. |
| CONV (Pin 5) | Convert start/control input | Rising edge initiates conversion; held high after completion enters auto-shutdown mode. |
| SDO (Pin 6) | Serial data output | 12-bit result shifted out MSB-first on falling SCK edge; tri-stated when CONV is high. |
| SCK (Pin 7) | Serial clock input | Accepts DC to 8 MHz; synchronizes data transfer; timing critical for tdDO (45–55 ns). |
| VCC (Pin 8) | Positive supply | 2.7V–3.6V operation; requires local 1µF bypass to GND for stable conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to fIN = 30 kHz (full linear bandwidth), enabling direct sensor interfacing without instrumentation amps. |
| Auto-shutdown between conversions | Reduces average supply current from 450 µA (150 ksps) to 10 µA (1 ksps), extending battery life in duty-cycled systems. |
| No minimum data transfer rate | Allows indefinite pause between SCK edges during readout - simplifies firmware timing in resource-constrained MCUs. |
| High impedance analog inputs | ±1 µA leakage and 12 pF input capacitance enable direct connection to high-Z sources (e.g., thermocouples, RTDs) with <200Ω source resistance. |
| SPI/MICROWIRE-compatible interface | 3-wire serial protocol (CONV, SCK, SDO) eliminates need for parallel bus routing - reduces PCB layer count in space-constrained designs. |
Applications
| Portable Data Loggers | Industrial Sensor Signal Conditioning |
|---|---|
|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog outputs from analog front-end op-amps and reference buffers. Use Value: 450 µA active current and 10 µA sleep current enable multi-year operation on coin-cell batteries; differential input rejects EMI in unshielded enclosures. |
Use Scenario: DIN-rail mounted PLC analog input modules acquiring 4–20 mA loop signals and thermocouple outputs. IC Role / Device Role / Timing Role: High-accuracy, isolated channel ADC with external reference for calibrated measurement across wide temperature ranges. Use Value: ±1 LSB INL and 72 dB SNR ensure compliance with IEC 61000-4-3 immunity requirements; 1V–VCC reference flexibility supports multiple sensor types on one board. |
| Medical Wearable Biosensors | Isolated Remote Monitoring Nodes |
|
Use Scenario: ECG/PPG patch devices measuring microvolt-level biopotentials with ultra-low power budget. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing differential electrode signals before digital filtering and BLE transmission. Use Value: True differential input rejects motion artifact and 50/60 Hz interference; 12-bit resolution resolves sub-µV changes in amplified bio-signals. |
Use Scenario: Wireless sensor nodes deployed in hazardous areas, powered by energy harvesting and transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Standalone ADC interfaced to MCU over short serial link, operating in burst-sampling mode synchronized to wake-up timer. Use Value: No minimum SCK rate allows precise control of active time; MSOP-8 footprint minimizes board area for compact RF + analog co-location. |
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 |
|---|---|---|---|
| LTC1864LCMS8#PBF | 16-bit resolution, same 150 ksps, identical MSOP-8 pinout and interface - but higher 1.22 mW power dissipation and ±2 LSB INL. | Used where higher resolution outweighs power penalty - e.g., precision calibration equipment requiring >14 ENOB. | Select LTC1864LCMS8#PBF only if 16-bit resolution is mandatory and system can accommodate ~2.7× higher active current. |
| ADS7822U | 12-bit, 200 ksps, SO-8 package, 2.7–5.25V supply, but no differential input - single-ended only, 1.5 mW power at 200 ksps. | Suitable for cost-sensitive, non-differential applications like potentiometer or supply rail monitoring. | Choose ADS7822U only when differential input is unnecessary and SO-8 layout compatibility is prioritized over noise immunity. |
Compared with LTC1860LCMS8#PBF, LTC1864LCMS8#PBF trades lower power for higher resolution, while ADS7822U sacrifices differential capability for higher speed and SO-8 availability - making LTC1860LCMS8#PBF optimal for battery-powered, noise-prone differential sensing where 12-bit fidelity suffices.
Availability
LTC1860LCMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and isolated remote monitoring requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LTC1860LCMS8#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, power management, and connectivity.
The LTC1860L series was designed specifically for ultra-low-power, high-speed data acquisition in space- and energy-constrained systems - emphasizing minimal supply current, differential noise rejection, and seamless integration with microcontrollers via simple serial interfaces.
FAQ
What is the operating temperature range for the LTC1860LCMS8#PBF?
The LTC1860LCMS8#PBF is rated for commercial temperature operation from 0°C to +70°C. This grade is validated across all electrical specifications including INL (±1 LSB), SNR (72 dB), and supply current (450 µA typ at 150 ksps) within that range. For extended industrial use (–40°C to +85°C), the LTC1860LIMS8#PBF variant is specified.
Does the LTC1860LCMS8#PBF require an external reference voltage?
Yes, the LTC1860LCMS8#PBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports VREF from 1V up to VCC (3.6V max), enabling ratiometric operation with bridge sensors or precision references like the LT1460. Unlike some ADCs, it has no internal reference and will not function without a valid VREF.
Can the LTC1860LCMS8#PBF interface directly with a microcontroller GPIO without level-shifting?
Yes - the LTC1860LCMS8#PBF's digital I/O (CONV, SCK, SDO) is fully compatible with 2.7V–3.6V logic levels. VIH is 1.9V min at VCC = 3.3V and VOL is 0.3V max at 400µA sink, allowing direct connection to most 3V MCUs (e.g., STM32L4, MSP430FRxx) without level shifters or pull-up resistors.
How does the auto-shutdown feature of the LTC1860LCMS8#PBF reduce system power?
The LTC1860LCMS8#PBF automatically powers down between conversions when CONV remains high. At 1 ksps, this reduces ICC from 450 µA to 10 µA - a 45× reduction. In burst-sampling applications (e.g., wake every 100 ms for 10 µs), average current drops into the nanoampere range, significantly extending battery life without firmware overhead.
Is the LTC1860LCMS8#PBF pin-compatible with any higher-resolution alternatives?
Yes - the LTC1860LCMS8#PBF is pin-compatible with the 16-bit LTC1864LCMS8#PBF and LTC1865LCMS8#PBF in the same MSOP-8 package. They share identical pin functions, supply ranges, and serial interface timing, enabling resolution upgrades without PCB redesign - though layout should verify thermal and decoupling adequacy for the higher 1.22 mW dissipation.
LTC1860LCMS8#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860LCMS8#PBF FAQ
1.How can I place an order for LTC1860LCMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LCMS8#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 LTC1860LCMS8#PBF reliable?
The price and inventory of LTC1860LCMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LCMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1860LCMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LCMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LCMS8#PBF?
LTC1860LCMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LCMS8#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 LTC1860LCMS8#PBF?
For technical support, including LTC1860LCMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LCMS8#PBF requirements.
6.How does Aetrix verify that LTC1860LCMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LCMS8#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 LTC1860LCMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1860LCMS8#PBF?
All LTC1860LCMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LCMS8#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 LTC1860LCMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1860LCMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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