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Analog Devices Inc. LTC1860LCS8#TRPBF
- Part No.:
- LTC1860LCS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1860LCS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,745
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Product details
Overview
LTC1860LCS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 150ksps single-channel successive approximation ADC with true differential analog inputs, operating from a single 2.7V–3.6V supply in an 8-lead SOIC package. It features auto shutdown (450µA typical at full speed, dropping to 10µA at 1ksps), SPI/MICROWIRE-compatible 3-wire serial interface, and external reference input supporting 1V–VCC spans - enabling direct sensor interfacing without gain stages in portable instrumentation.
For engineers reviewing the LTC1860LCS8#TRPBF datasheet, LTC1860LCS8#TRPBF pinout, LTC1860LCS8#TRPBF application, or LTC1860LCS8#TRPBF equivalent, key selection criteria include its differential input architecture, 72dB SNR at 1kHz, ±1 LSB INL, 3.7µs conversion time, and compatibility with ratiometric or precision external references - critical for low-power, high-accuracy data acquisition in space-constrained systems.
Technical Context
The LTC1860LCS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input operation where full-scale range equals VREF – 1LSB. Its conversion cycle is initiated by a rising edge on CONV, completing in 3.7–4.66µs, after which it enters sleep mode if CONV remains high.
It uses a 3-wire serial interface (SCK, SDO, CONV) with data output on SCK falling edges and sampling synchronized to CONV timing. The device accepts external reference voltages from 1V to VCC, and its analog inputs tolerate absolute ranges of –0.05V to VCC + 0.05V (IN+) and –0.05V to VCC/2 (IN–), enabling flexible signal conditioning in isolated or battery-powered designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for precise analog-to-digital conversion in measurement-critical applications. |
| Sampling Rate | 150ksps maximum - supports real-time acquisition of signals up to ~30kHz full-linear bandwidth with ≥68dB SINAD. |
| Supply Current | 450µA typical at 150ksps; drops to 10µA at 1ksps - enables ultra-low-power operation in battery-powered systems. |
| INL | ±1 LSB - ensures monotonic transfer function and accurate end-point linearity across temperature (0°C to 70°C). |
| SNR | 72dB at 1kHz input - provides high dynamic range for resolving small signals amid noise in sensor front-ends. |
| Conversion Time | 3.7–4.66µs - defines minimum inter-conversion interval and supports tight timing control in deterministic systems. |
| Reference Range | 1V to VCC (2.7V–3.6V) - allows use of internal rail or precision external references, enabling ratiometric or absolute measurements. |
Pinout & Package
Package: 8-lead plastic SOIC (narrow, 0.150-inch width), RoHS-compliant, moisture sensitivity level 1.
| 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; supports 1V–VCC range. |
| IN+ (Pin 2) | Differential Analog Input (+) | Positive input of differential pair; accepts –0.05V to VCC + 0.05V; sampled simultaneously with IN– for CMRR. |
| IN– (Pin 3) | Differential Analog Input (–) | Negative input of differential pair; accepts –0.05V to VCC/2; enables rejection of common-mode noise and offset. |
| GND (Pin 4) | Analog Ground | Single-point connection to analog ground plane; critical for noise immunity and DC accuracy. |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V single supply; requires local 1µF bypass to GND; powers analog and digital sections. |
| SCK (Pin 7) | Serial Clock Input | Accepts DC–8MHz clock; synchronizes bit transfers; falling edge clocks data out on SDO. |
| SDO (Pin 6) | Serial Data Output | 3-state output enabled when CONV is low; outputs 12-bit result MSB-first on SCK falling edges. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; falling edge enables SDO; high state after conversion triggers auto-shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise and interference between IN+ and IN–, enabling robust sensing in electrically noisy environments. |
| Auto Shutdown Power Management | Reduces current from 450µA to 10µA between conversions - extends battery life without software intervention. |
| Flexible Reference Support | Accepts 1V–VCC external references, allowing ratiometric operation (e.g., with resistive sensors) or precision absolute measurement. |
| High Input Impedance & Low Leakage | ±1µA analog input leakage and 12pF input capacitance in sample mode minimize loading on high-impedance sources. |
| SPI/MICROWIRE-Compatible Interface | 3-wire serial protocol eliminates parallel bus overhead and simplifies MCU/DSP integration with minimal GPIO usage. |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Battery-powered ECG front-end acquiring biopotential signals from dry electrodes with minimal amplification. IC Role / Device Role / Timing Role: Primary 12-bit ADC digitizing differential electrode voltage with 72dB SNR and 30kHz linear bandwidth. Use Value: Enables >24-hour operation on coin cell via 10µA sleep current and eliminates external op-amp gain stage using 1V–3.6V reference flexibility. |
Use Scenario: Remote RTD or thermocouple transmitter in hazardous area requiring intrinsic safety and low power. IC Role / Device Role / Timing Role: Isolated analog input conditioner converting sensor voltage to digital stream for 4–20mA loop or wireless transmission. Use Value: Differential input rejects ground-loop noise; 150ksps sampling captures transient thermal events; 3.7µs conversion enables deterministic timing in SIL-2 systems. |
| Smart Energy Meters | Test & Measurement Modules |
Use Scenario: Sub-metering node measuring AC voltage/current harmonics in residential solar inverters. IC Role / Device Role / Timing Role: High-fidelity ADC capturing 50/60Hz fundamentals and up to 5th harmonic with 86dB THD. Use Value: 72dB SNR and ±1 LSB INL ensure Class 0.5 metering accuracy; SOIC package supports automated optical inspection in high-volume production. |
Use Scenario: Compact handheld oscilloscope probe with embedded signal conditioning and digitization. IC Role / Device Role / Timing Role: Core sampling engine delivering 150ksps waveform capture with 10MHz full-power bandwidth. Use Value: 3-wire interface reduces PCB routing complexity; 8-lead SOIC footprint minimizes board area; 2.7V operation extends runtime on Li-ion cells. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864LCS8#PBF | 16-bit resolution, same 150ksps rate, identical SO-8 package and pinout, but higher 1.22mW power dissipation at full speed. | Required where higher resolution outweighs SNR trade-off (74dB vs 72dB); not suitable for strict <500µA supply budgets. | Select when 16-bit precision is mandatory and system can accommodate higher power and cost. |
| ADS7822U | 12-bit, 200ksps, 2.7–5.25V supply, SPI interface, but only single-ended input and no external reference support (internal 2.5V ref). | Applicable in non-differential, fixed-reference designs; lacks ratiometric capability and true differential CMRR. | Choose for simpler, lower-cost systems where differential input and reference flexibility are unnecessary. |
Compared with LTC1860LCS8#TRPBF, LTC1864LCS8#PBF offers higher resolution at the cost of increased power and price, while ADS7822U sacrifices differential input and reference flexibility for higher speed and lower system complexity - making LTC1860LCS8#TRPBF optimal for low-power, differential-sensing applications demanding design flexibility.
Availability
LTC1860LCS8#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, smart energy meters, and test & measurement modules requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.
Supply support for LTC1860LCS8#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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1860L series belongs to Linear's µPower precision ADC product line, designed specifically for compact, battery-operated instrumentation requiring high accuracy, low quiescent current, and minimal external components.
FAQ
What is the maximum sampling frequency of the LTC1860LCS8#TRPBF?
The LTC1860LCS8#TRPBF supports a maximum sampling frequency of 150ksps, with guaranteed performance including ±1 LSB INL and 72dB SNR at 1kHz input under standard conditions (VCC = 2.7V, VREF = 2.5V, TA = 25°C). Conversion time is specified as 3.7–4.66µs, defining the minimum inter-sample interval.
Does the LTC1860LCS8#TRPBF support differential input operation?
Yes, the LTC1860LCS8#TRPBF features true differential analog inputs (IN+, IN–) that measure the voltage difference between the two pins. This architecture provides inherent common-mode noise rejection and enables accurate measurement of floating or ground-referenced signals without additional instrumentation amplifiers.
Can the LTC1860LCS8#TRPBF operate with a 1V reference voltage?
Yes, the LTC1860LCS8#TRPBF supports external reference voltages from 1V to VCC (2.7V–3.6V). Using a 1V reference enables full-scale input ranges down to 1V, allowing direct connection to low-output sensors and reducing system power consumption by avoiding gain stages.
What is the supply current of the LTC1860LCS8#TRPBF at 1ksps?
At 1ksps, the LTC1860LCS8#TRPBF draws only 10µA typical supply current due to its auto-shutdown feature, which powers down the internal circuitry between conversions. This ultra-low standby current significantly extends battery life in intermittent-sampling applications.
Is the LTC1860LCS8#TRPBF pin-compatible with any higher-resolution alternatives?
Yes, the LTC1860LCS8#TRPBF is pin-compatible with the 16-bit LTC1864LCS8#PBF in the same SO-8 package. Both share identical pin functions and layout, enabling resolution upgrades without PCB redesign - though the LTC1864LCS8#PBF draws higher supply current (1.22mW vs 0.45mW at full speed).
LTC1860LCS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860LCS8#TRPBF FAQ
1.How can I place an order for LTC1860LCS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LCS8#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 LTC1860LCS8#TRPBF reliable?
The price and inventory of LTC1860LCS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LCS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860LCS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LCS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LCS8#TRPBF?
LTC1860LCS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LCS8#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 LTC1860LCS8#TRPBF?
For technical support, including LTC1860LCS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LCS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860LCS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LCS8#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 LTC1860LCS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860LCS8#TRPBF?
All LTC1860LCS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LCS8#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 LTC1860LCS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860LCS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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