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Analog Devices Inc. LTC1860CMS8#PBF
- Part No.:
- LTC1860CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860CMS8#PBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:541
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Product details
Overview
LTC1860CMS8#PBF from Analog Devices (formerly Linear Technology) is a 12-bit, single-channel, successive-approximation analog-to-digital converter with true differential input, operating on a single 5V supply at up to 250ksps sampling rate. It features auto-shutdown (1nA typical sleep current), SPI/MICROWIRE-compatible 3-wire serial interface, and MSOP-8 package. It is used in portable instrumentation where low power, high resolution, and compact size are critical.
For engineers reviewing the LTC1860CMS8#PBF datasheet, LTC1860CMS8#PBF pinout, LTC1860CMS8#PBF application, or LTC1860CMS8#PBF equivalent, key selection criteria include its 12-bit resolution with ±1 LSB INL, 72dB SNR, differential input range of 0 to VREF, adjustable reference support down to 1V full-scale, and guaranteed operation from 0°C to 70°C in the MSOP-8 package.
Technical Context
The LTC1860CMS8#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 2.75–3.2 µs, and automatically enters ultra-low-power sleep mode (1nA typ.) when CONV remains high post-conversion.
It supports ratiometric operation or external reference inputs from 1V to VCC (5V), enabling direct connection to signal sources without gain stages. The high-impedance analog inputs (±1 µA leakage) and 12 pF input capacitance in sample mode require careful source impedance management (<200 Ω) for full accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes across full temperature range. |
| Sampling Rate | 250 ksps maximum - enables real-time acquisition of signals up to 125 kHz full linear bandwidth. |
| INL | ±1 LSB - ensures monotonicity and <0.025% full-scale linearity error for precision measurement. |
| SNR | 72 dB - supports >11.5 effective number of bits (ENOB) for clean signal digitization. |
| Supply Current | 850 µA at 250 ksps; drops to 1 nA in auto-shutdown - reduces battery load in portable systems. |
| Analog Input Range | Differential: 0 V to VREF; absolute: –0.05 V to VCC + 0.05 V - allows rail-to-rail input when IN– = GND and VREF = VCC. |
| Reference Range | 1 V to 5 V - permits flexible scaling for low-voltage sensors without external amplification. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0 mm × 3.0 mm × 0.86 mm body, 0.65 mm pitch, lead-free finish (Pb-free, RoHS compliant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Defines full-scale span; must be low-noise and bypassed with ≥1 µF tantalum to AGND. |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance input sampled simultaneously with IN–; accepts up to VCC + 0.05 V. |
| IN– (Pin 3) | Differential analog input (–) | Common-mode rejection enabled by simultaneous sampling; accepts down to –0.05 V. |
| GND (Pin 4) | Analog ground | Must connect directly to analog ground plane with minimal trace length to minimize noise coupling. |
| CONV (Pin 5) | Convert control input | Rising edge starts conversion; falling edge enables SDO and initiates serial readout. |
| SDO (Pin 6) | Serial data output | 3-wire SPI/MICROWIRE-compatible output; data valid on SCK falling edge, captured on rising edge. |
| SCK (Pin 7) | Serial clock input | Synchronizes data transfer; max frequency 20 MHz (H-grade), 16.7 MHz (C/I-grade). |
| VCC (Pin 8) | Positive supply | Single 4.75 V to 5.25 V supply; requires local 1 µF bypass to GND for stable conversion performance. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces supply current to 1 nA typical, extending battery life in intermittent-sampling applications. |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair, enabling accurate measurements in noisy environments. |
| Adjustable reference input (1 V to VCC) | Eliminates need for external gain/level-shift circuitry when interfacing low-output sensors. |
| Guaranteed operation to 70°C (C-grade) | Validated performance across industrial ambient range without derating or thermal management. |
| MSOP-8 package with 0.65 mm pitch | Enables high-density PCB layouts in space-constrained portable and embedded systems. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitoring units logging temperature, humidity, and pressure over weeks on coin-cell power. IC Role / Device Role / Timing Role: Primary ADC acquiring conditioned sensor outputs at 1–10 ksps with automatic sleep/wake cycling synchronized to sensor polling intervals. Use Value: 850 µA active current and 1 nA sleep current enable multi-month operation; differential input rejects EMI from nearby switching regulators. |
Use Scenario: DIN-rail mounted process transmitters converting 4–20 mA or thermocouple signals into digital output for PLC communication. IC Role / Device Role / Timing Role: High-accuracy front-end ADC providing 12-bit resolution with ±1 LSB INL for calibrated analog input conditioning. Use Value: Adjustable 1–5 V reference support allows direct interface to precision voltage references (e.g., LT1460), eliminating calibration drift from supply variation. |
| Medical Wearables | Isolated Remote Acquisition |
Use Scenario: Compact ECG or pulse oximetry modules requiring low-noise, low-power analog front-end in wearable form factor. IC Role / Device Role / Timing Role: Differential-input ADC digitizing amplified biopotential signals while minimizing power draw from small Li-ion cells. Use Value: 72 dB SNR and 71 dB SINAD ensure diagnostic-grade signal fidelity; MSOP-8 footprint fits tight board area constraints. |
Use Scenario: Distributed sensor nodes in factory automation, located meters from controller, powered via isolated DC-DC and communicating over opto-isolated UART/SPI. IC Role / Device Role / Timing Role: Isolated-side ADC capturing analog sensor data before transmission across galvanic barrier. Use Value: Single-supply 5 V operation simplifies isolated biasing; high-impedance inputs reduce loading on isolated signal conditioners. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, serial-interface ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864CMS8#PBF | 16-bit resolution, same 250 ksps rate, identical MSOP-8 pinout, higher 4.25 mW power dissipation. | Used where higher resolution (>12-bit) is required without changing layout or firmware interface. | Select LTC1864CMS8#PBF only if ENOB >11.5 bits is mandatory; otherwise LTC1860CMS8#PBF offers better power efficiency for 12-bit needs. |
| ADS7822U | 12-bit, 200 ksps, SO-8 package, 2.7–5.25 V supply, no differential input (single-ended only), 1.25 mW typical power. | Suitable for cost-sensitive, non-differential applications with wider supply range and lower quiescent current at reduced speed. | Choose ADS7822U for single-ended designs with sub-200 ksps requirements and dual-supply flexibility; not drop-in due to pinout and input architecture differences. |
Compared with LTC1864CMS8#PBF and ADS7822U, the LTC1860CMS8#PBF uniquely balances 12-bit precision, true differential input, ultra-low sleep current, and MSOP-8 compatibility-making it optimal for portable, noise-immune, battery-critical measurement systems where 250 ksps is required.
Availability
LTC1860CMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical wearables requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LTC1860CMS8#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 signal chain applications.
The LTC1860CMS8#PBF belongs to Linear's µPower SAR ADC product line, designed specifically for compact, battery-operated systems demanding high resolution, low quiescent current, and robust noise immunity in harsh electrical environments.
FAQ
What is the maximum sampling rate of the LTC1860CMS8#PBF?
The LTC1860CMS8#PBF achieves a maximum sampling rate of 250 ksps at 5V supply and 25°C. At the extended temperature range (0°C to 70°C), the guaranteed maximum remains 250 ksps for the C-grade variant. Conversion time is specified as 2.75–3.2 µs, consistent with this rate.
Does the LTC1860CMS8#PBF support differential input operation?
Yes, the LTC1860CMS8#PBF features true differential analog inputs (IN+, IN–) that reject common-mode noise. It measures the voltage difference between these pins, delivering a unipolar 12-bit output code proportional to (IN+ − IN–), with full scale equal to VREF − 1 LSB.
Can the LTC1860CMS8#PBF operate with a 1V reference voltage?
Yes, the LTC1860CMS8#PBF supports reference voltages from 1V to VCC (5V). Operation at 1V full-scale enables direct digitization of low-output sensors (e.g., MEMS accelerometers, thermistors) without external gain stages, preserving signal-to-noise ratio.
What is the sleep current of the LTC1860CMS8#PBF during auto-shutdown?
The LTC1860CMS8#PBF draws a typical sleep current of 1 nA when CONV is held high after conversion completion. This ultra-low leakage enables multi-year battery life in intermittently active measurement systems such as remote data loggers.
Is the LTC1860CMS8#PBF pin-compatible with other devices in the LTC186x family?
Yes, the LTC1860CMS8#PBF shares identical pinout and footprint with the LTC1864CMS8#PBF (16-bit version) in the MSOP-8 package. This allows hardware reuse and firmware-compatible upgrades where higher resolution is later required without PCB redesign.
LTC1860CMS8#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):
- 250k
- 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:
- 5V
- Voltage - Supply, Digital:
- 5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860CMS8#PBF FAQ
1.How can I place an order for LTC1860CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860CMS8#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 LTC1860CMS8#PBF reliable?
The price and inventory of LTC1860CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1860CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860CMS8#PBF?
LTC1860CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860CMS8#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 LTC1860CMS8#PBF?
For technical support, including LTC1860CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860CMS8#PBF requirements.
6.How does Aetrix verify that LTC1860CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1860CMS8#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 LTC1860CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1860CMS8#PBF?
All LTC1860CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860CMS8#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 LTC1860CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1860CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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