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Analog Devices Inc. LTC1860LCMS8#TRPBF
- Part No.:
- LTC1860LCMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860LCMS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,963
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Product details
Overview
LTC1860LCMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 150ksps successive approximation ADC with true differential analog input, external reference pin, and 3-wire SPI/MICROWIRE-compatible serial interface. It operates on a single 2.7V–3.6V supply, draws only 450µA at full speed, and auto-shuts down between conversions-enabling ultra-low-power data acquisition in space-constrained systems such as portable instrumentation and isolated sensor nodes.
For engineers reviewing the LTC1860LCMS8#TRPBF datasheet, LTC1860LCMS8#TRPBF pinout, LTC1860LCMS8#TRPBF application, or LTC1860LCMS8#TRPBF equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated MSOP-8 pin functions, application-specific implementation guidance, and two confirmed alternative parts with documented functional and packaging differences.
Technical Context
The LTC1860LCMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage accepts IN+–IN– voltages from 0V to VREF, supporting ratiometric measurements or precision external references down to 1V full-scale. Conversion is initiated by a rising edge on CONV; result readout occurs on SDO synchronized to SCK falling edges, with no minimum clock rate requirement.
Auto-power-down reduces supply current to 10µA at 1ksps, and internal biasing enables stable operation across 0°C to 70°C ambient. The device requires separate analog ground (GND) connection and mandates low-noise bypassing of VCC and VREF with ≥1µF tantalum capacitors directly to that ground plane-critical for achieving 72dB SNR and ±1 LSB INL over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 distinct output codes with no missing codes across full operating range. |
| Max Sampling Rate | 150 ksps - supports real-time acquisition of signals up to ~30 kHz full-linear bandwidth. |
| Supply Current @ 150ksps | 450 µA typical - enables >1-year battery life in 3V coin-cell-powered sensor nodes at 100Hz sampling. |
| INL Error | ±1 LSB - ensures end-point linearity sufficient for closed-loop control feedback without calibration. |
| SNR | 72 dB - resolves sub-2mV RMS noise floor when digitizing 3V-span signals (≈1.2mV effective resolution). |
| Reference Range | 1V to VCC - allows direct use of 2.5V or 3.0V precision references or ratiometric sensing with supply rails. |
| Operating Temp | 0°C to 70°C - qualified for commercial-grade embedded instrumentation and industrial front-ends. |
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 to GND; supports 1V–VCC range. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts –0.05V to VCC+0.05V. |
| IN– (Pin 3) | Differential Analog Input (–) | Common-mode rejection enabled by simultaneous sampling; valid range –0.05V to VCC/2. |
| GND (Pin 4) | Analog Ground | Primary return path for analog circuitry; must connect directly to low-impedance analog ground plane. |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; high level after completion triggers auto-sleep mode. |
| SDO (Pin 6) | Serial Data Output | 3-wire interface output; 12-bit result shifted out MSB-first on SCK falling edges. |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports DC to 8 MHz; no minimum frequency required. |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V single supply; requires dedicated 1µF tantalum bypass to GND for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise on IN+/IN– pair, enabling robust measurement in electrically noisy environments. |
| Auto-Power-Down Between Conversions | Reduces ICC from 450µA @ 150ksps to 10µA @ 1ksps-eliminates need for external sleep control logic. |
| No Minimum Data Transfer Rate | Permits ultra-slow polling (e.g., once per second) without timing violations or initialization resets. |
| 12-Bit No-Missing-Codes Performance | Guarantees monotonicity and predictable code transitions across full temperature range (0°C to 70°C). |
| MSOP-8 Footprint Compatibility | Shares PCB layout with pin-compatible 16-bit LTC1864L/LTC1865L-enables resolution upgrade without redesign. |
Applications
| Portable Instrumentation | Isolated Sensor Interface |
|---|---|
Use Scenario: Handheld multimeter acquiring voltage, current, and temperature readings from multiple sensors using a single 3V coin cell. IC Role / Device Role / Timing Role: Primary ADC digitizing differential sensor outputs with rail-to-rail input capability when IN– is grounded and VREF = VCC. Use Value: 450µA supply current at 150ksps extends battery life beyond 18 months while maintaining 12-bit resolution and 72dB SNR. |
Use Scenario: Industrial pressure transducer module with galvanic isolation, where analog signal crosses barrier before digitization. IC Role / Device Role / Timing Role: Low-power ADC placed on isolated side, sampling differential bridge output referenced to local VREF. Use Value: True differential input rejects common-mode noise induced by isolation barrier; 1V–VCC reference flexibility simplifies isolated reference design. |
| Compact Data Acquisition Node | Low-Power Battery Monitoring |
Use Scenario: Wireless node measuring vibration, temperature, and humidity for predictive maintenance in HVAC equipment. IC Role / Device Role / Timing Role: Central ADC interfacing with op-amp signal conditioning stages prior to RF transmission. Use Value: MSOP-8 package minimizes board area; 12pF input capacitance in sample mode allows direct connection to fast-settling op-amps like LT1807. |
Use Scenario: Smart battery pack monitoring cell voltages and temperatures under dynamic load conditions. IC Role / Device Role / Timing Role: High-accuracy ADC measuring stacked Li-ion cell voltages via resistive dividers with external 2.5V reference. Use Value: ±1 LSB INL ensures <±0.06% full-scale error in voltage measurement; auto-shutdown cuts quiescent current to 10µA during idle periods. |
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#TRPBF | 16-bit resolution, same MSOP-8 package, identical pinout, but higher 2.7V–5.5V supply range and 1.22mW power at 150ksps. | Used where higher resolution is required (e.g., precision weigh scales), but demands more supply headroom and power budget. | Select when 16-bit resolution justifies +0.8mW power increase and wider supply tolerance is needed. |
| ADS7822U | 12-bit, 200ksps, SO-8 package, SPI-compatible, but requires external reference and has no auto-shutdown (1.2mA typical). | Deployed in cost-sensitive industrial PLC I/O modules where board space is less constrained than in portable devices. | Choose for legacy SO-8 compatibility and higher speed, accepting higher current draw and manual power management. |
Compared with LTC1860LCMS8#TRPBF, LTC1864LCMS8#TRPBF offers 4-bit higher resolution in identical footprint but consumes ~3× more power; ADS7822U provides faster sampling in SO-8 but lacks auto-shutdown and increases system-level power management complexity.
Availability
LTC1860LCMS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated sensor interfaces, and compact data acquisition nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LTC1860LCMS8#TRPBF 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. (including former Linear Technology products) designs high-performance analog, mixed-signal, and digital signal processing ICs for precision measurement, power management, and signal integrity applications.
The LTC1860L series was developed specifically for ultra-low-power, high-speed data acquisition in space-constrained, battery-operated systems-emphasizing minimal supply current, differential input fidelity, and seamless integration with microcontrollers via 3-wire serial interfaces.
FAQ
What is the maximum sampling frequency supported by the LTC1860LCMS8#TRPBF?
The LTC1860LCMS8#TRPBF supports a maximum sampling frequency of 150 ksps, as specified in the Recommended Operating Conditions table. At this rate, the conversion time is 3.7–4.66 µs, and the device draws 450 µA typical supply current. This performance is guaranteed across the full 0°C to 70°C operating temperature range and 2.7V–3.6V supply voltage range.
Does the LTC1860LCMS8#TRPBF require an external reference voltage?
Yes, the LTC1860LCMS8#TRPBF requires an external reference voltage applied to the VREF pin (Pin 1). It supports reference voltages from 1V up to VCC, enabling both ratiometric operation (e.g., VREF = VCC) and precision measurement with dedicated references like the LT1460. The device does not include an internal reference.
Can the LTC1860LCMS8#TRPBF operate from a 2.5V supply?
Yes, the LTC1860LCMS8#TRPBF operates from 2.7V to 3.6V, so a nominal 2.5V supply is below its minimum rated voltage. It will not function reliably at 2.5V. For 2.5V systems, consider verifying actual rail stability under load-many "2.5V" supplies dip below 2.7V during transient conditions, risking specification violation.
What is the purpose of the CONV pin on the LTC1860LCMS8#TRPBF?
The CONV pin (Pin 5) serves as the conversion trigger and power-state controller for the LTC1860LCMS8#TRPBF. A rising edge initiates sampling and conversion; if held high after conversion completes, the device enters auto-shutdown mode, reducing supply current to ~10 µA. A falling edge enables the SDO pin for serial data readout.
Is the LTC1860LCMS8#TRPBF pin-compatible with any higher-resolution alternatives?
Yes, the LTC1860LCMS8#TRPBF is pin-compatible with the 16-bit LTC1864LCMS8#TRPBF and LTC1865LCMS8#TRPBF in the same MSOP-8 package. This allows resolution upgrades without PCB redesign-though note that the higher-resolution variants require 2.7V–5.5V supply and draw more power (1.22 mW vs. 0.40 mW at 150 ksps).
LTC1860LCMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LTC1860LCMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LCMS8#TRPBF 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#TRPBF reliable?
The price and inventory of LTC1860LCMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LCMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860LCMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LCMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LCMS8#TRPBF?
LTC1860LCMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LCMS8#TRPBF 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#TRPBF?
For technical support, including LTC1860LCMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LCMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860LCMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LCMS8#TRPBF 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#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860LCMS8#TRPBF?
All LTC1860LCMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LCMS8#TRPBF, 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#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860LCMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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