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Analog Devices Inc. LTC1860HMS8#PBF
- Part No.:
- LTC1860HMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860HMS8#PBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,018
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Product details
Overview
LTC1860HMS8#PBF from Analog Devices (acquired Linear Technology) is a 12-bit, 250ksps single-channel successive approximation ADC with true differential analog input, adjustable reference pin, and SPI/MICROWIRE-compatible serial interface. It operates on a single 5V supply, draws only 850µA typical supply current at full speed, and auto-shuts down to 1nA between conversions. Designed for high-speed, low-power data acquisition in harsh environments, it supports operation up to 125°C and delivers 72dB SNR and ±1 LSB INL.
For engineers reviewing the LTC1860HMS8#PBF datasheet, LTC1860HMS8#PBF pinout, LTC1860HMS8#PBF application, or LTC1860HMS8#PBF equivalent, key selection criteria include its MSOP-8 package, H-grade temperature range (–40°C to 125°C), differential input architecture, 2.75µs conversion time, and compatibility with external references down to 1V full-scale - critical for battery-powered instrumentation and isolated sensing systems.
Technical Context
The LTC1860HMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage accepts IN+ and IN– signals referenced to GND, enabling common-mode noise rejection. The adjustable VREF pin allows flexible full-scale span configuration from 1V to 5V, supporting ratiometric or precision external reference designs.
Control is managed via a 3-wire serial interface (SCK, SDO, CONV) with no SDI pin - unlike the dual-channel LTC1861. Conversion is initiated by a rising edge on CONV; data is clocked out on SDO's falling SCK edges, with timing guaranteed across the full –40°C to 125°C operating range per H-grade specifications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes with no missing codes guaranteed. |
| Sampling Rate | 250ksps maximum - enables real-time capture of signals up to 125kHz Nyquist bandwidth. |
| Supply Current | 850µA typical at 250ksps; drops to 1nA in auto-shutdown - reduces power in duty-cycled systems. |
| INL | ±1 LSB max - 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. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial control, and downhole applications. |
| Reference Range | 1V to VCC (5V) - permits direct use of low-noise 1.2V or 2.5V references to optimize dynamic range. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm body, 0.65mm pitch, lead-free finish, JEDEC MO-187 variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale voltage span; must be low-noise and bypassed to GND with ≥1µF capacitor. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts 0V to VREF range. |
| IN– (Pin 3) | Differential Analog Input (–) | Common-mode rejection path; both inputs sampled at same instant to cancel noise. |
| GND (Pin 4) | Analog Ground | Primary ground return for analog circuitry; requires direct connection to analog ground plane. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; held high after completion to enter 1nA sleep mode. |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI-compatible output; 12-bit result shifted out MSB-first on falling SCK edges. |
| SCK (Pin 7) | Serial Clock Input | Master-controlled clock; synchronizes data transfer; max frequency 20MHz (H-grade). |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1µF tantalum bypass to GND for stable conversion. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input | Rejects common-mode noise on IN+/IN– pair, enabling robust sensing in electrically noisy environments. |
| Auto Power-Down | Reduces ICC to 1nA between conversions without external control - eliminates need for sleep-state firmware logic. |
| Wide Reference Range | Supports 1V–5V VREF, allowing optimization of resolution vs. input signal range (e.g., 1V ref for 0–1V sensor output). |
| H-Grade Temperature Rating | Guaranteed performance from –40°C to +125°C - suitable for engine control units and industrial motor drives. |
| Low Input Leakage | ±1µA max analog input leakage - minimizes error when interfacing high-impedance sources like thermocouples or pH electrodes. |
Applications
| Industrial Process Monitoring | Automotive Engine Control |
|---|---|
Use Scenario: Continuous monitoring of pressure, temperature, and exhaust gas sensors in factory PLC I/O modules. IC Role / Device Role / Timing Role: Primary 12-bit sampling ADC capturing analog sensor outputs at ≤250ksps with differential noise immunity. Use Value: Enables direct connection to millivolt-level transducers without gain stages, reducing BOM cost and board space while maintaining ±1 LSB linearity over temperature. |
Use Scenario: Digitizing crankshaft position, throttle angle, and manifold absolute pressure signals in ECU subsystems. IC Role / Device Role / Timing Role: High-reliability ADC operating at 125°C ambient, synchronized to engine timing via external microcontroller. Use Value: Guaranteed H-grade specification ensures consistent 72dB SNR and 250ksps throughput under under-hood thermal stress, improving closed-loop control accuracy. |
| Portable Medical Instrumentation | Isolated Data Acquisition |
Use Scenario: Battery-powered ECG front-end acquiring biopotential signals with low power budget constraints. IC Role / Device Role / Timing Role: Ultra-low-quiescent ADC powering down to 1nA between samples to extend battery life in handheld devices. Use Value: 850µA active current + 1nA shutdown enables multi-hour operation on coin-cell batteries while preserving 12-bit resolution for diagnostic-grade waveform fidelity. |
Use Scenario: Signal conditioning in isolated industrial sensors using digital isolators (e.g., ADuM140x) between ADC and host MCU. IC Role / Device Role / Timing Role: Isolated-side ADC providing galvanically separated analog-to-digital conversion with minimal timing jitter. Use Value: 2.75µs conversion time and deterministic SDO timing allow tight synchronization with isolator propagation delay, minimizing latency in safety-critical feedback loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, serial-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864CMS8#PBF | 16-bit resolution, same 250ksps rate, identical MSOP-8 package and pinout, but higher 4.25mW power dissipation. | Used where higher resolution (>12-bit) is required for low-drift DC measurements; not drop-in due to different code width and timing margins. | Select LTC1864CMS8#PBF only when ENOB >12.5 bits is mandatory; otherwise LTC1860HMS8#PBF offers better power efficiency for 12-bit needs. |
| ADS7822U | 12-bit, 200ksps, SO-8 package, 2.7V–5.25V supply, but lacks differential input and auto-shutdown (250µA standby). | Targeted at single-ended, lower-voltage systems; unsuitable for high-noise differential sensing or ultra-low-power duty cycling. | Choose ADS7822U for cost-sensitive, single-ended 3.3V designs; LTC1860HMS8#PBF remains preferred for differential integrity and 125°C operation. |
Compared with LTC1864CMS8#PBF and ADS7822U, the LTC1860HMS8#PBF uniquely balances 12-bit precision, differential input capability, 1nA shutdown, and extended temperature operation - making it optimal for compact, ruggedized, and battery-constrained measurement nodes where noise immunity and thermal reliability are non-negotiable.
Availability
LTC1860HMS8#PBF is available at Aetrix Electronics and suitable for industrial process monitoring, automotive engine control, portable medical instrumentation, and isolated data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1860HMS8#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, formed through the acquisition of Linear Technology in 2017.
The LTC1860HMS8#PBF belongs to Linear Technology's legacy precision data acquisition product line, engineered specifically for low-power, high-speed, and high-temperature applications where signal integrity and reliability outweigh raw resolution.
FAQ
What is the maximum sampling frequency of the LTC1860HMS8#PBF?
The LTC1860HMS8#PBF supports a maximum sampling frequency of 250ksps, verified across its full –40°C to +125°C operating range. This is enabled by a 20MHz maximum SCK frequency and a guaranteed 2.75µs conversion time, allowing precise timing control in real-time data acquisition systems without oversampling penalties.
Does the LTC1860HMS8#PBF support differential input operation?
Yes, the LTC1860HMS8#PBF features true differential analog inputs (IN+, IN–) that sample simultaneously to reject common-mode noise. Its transfer function measures the voltage difference between these pins, delivering full 12-bit linearity with ±1 LSB INL - a core capability distinguishing it from single-ended alternatives like the ADS7822U.
What reference voltage range is supported by the LTC1860HMS8#PBF?
The LTC1860HMS8#PBF accepts an external reference voltage (VREF) from 1V to 5V, enabling flexible full-scale span configuration. This allows direct interfacing with low-noise 1.25V or 2.5V references to maximize dynamic range for sub-5V sensor outputs, while maintaining guaranteed performance across the entire H-grade temperature range.
How does the auto-shutdown feature work on the LTC1860HMS8#PBF?
The LTC1860HMS8#PBF automatically enters a 1nA sleep state when the CONV pin is held high after conversion completion. No software command or external enable signal is needed - this hardware-driven power reduction eliminates idle current in duty-cycled systems, extending battery life in portable instrumentation without firmware overhead.
Is the LTC1860HMS8#PBF pin-compatible with other members of the LTC186x family?
The LTC1860HMS8#PBF shares the same MSOP-8 pinout with the LTC1860CMS8#PBF and LTC1860IMS8#PBF, but is not pin-compatible with the 10-lead LTC1861 variants or the 16-bit LTC1864/LTC1865. Its CONV/SDO/SCK interface differs fundamentally from the LTC1861's SDI-based channel selection, preventing direct substitution without layout or firmware changes.
LTC1860HMS8#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:
- -40°C ~ 125°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860HMS8#PBF FAQ
1.How can I place an order for LTC1860HMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860HMS8#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 LTC1860HMS8#PBF reliable?
The price and inventory of LTC1860HMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860HMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1860HMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860HMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860HMS8#PBF?
LTC1860HMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860HMS8#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 LTC1860HMS8#PBF?
For technical support, including LTC1860HMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860HMS8#PBF requirements.
6.How does Aetrix verify that LTC1860HMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1860HMS8#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 LTC1860HMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1860HMS8#PBF?
All LTC1860HMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860HMS8#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 LTC1860HMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1860HMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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