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Analog Devices Inc. LTC1860LIS8#TRPBF
- Part No.:
- LTC1860LIS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1860LIS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,697
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Product details
Overview
LTC1860LIS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 150ksps single-channel successive approximation ADC with true differential analog input and external reference support. It operates on a single 2.7V–3.6V supply, draws only 450µA at full speed, and auto-shutdowns between conversions to reduce current to 10µA at 1ksps. Designed for compact, battery-powered data acquisition systems requiring high resolution and low power, it features SPI/MICROWIRE-compatible 3-wire serial I/O in an 8-lead SO package.
For engineers reviewing the LTC1860LIS8#TRPBF datasheet, LTC1860LIS8#TRPBF pinout, LTC1860LIS8#TRPBF application, or LTC1860LIS8#TRPBF equivalent, key selection considerations include its differential input architecture, 12-bit no-missing-codes performance, −40°C to +85°C industrial temperature range, and compatibility with ratiometric or externally referenced signal chains in space-constrained instrumentation.
Technical Context
The LTC1860LIS8#TRPBF 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 outputs 12-bit data via SDO synchronized to SCK falling edges - compatible with standard SPI/MICROWIRE controllers without minimum clock rate constraints.
It supports unipolar differential input ranges from 0V to VREF (1V–3.6V), with high-impedance analog inputs (±1µA leakage) and input capacitance of 12pF in sample mode. The external VREF pin enables flexible scaling, while internal auto-power-down logic ensures dynamic current scaling across sampling frequencies from 1ksps to 150ksps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit with guaranteed no missing codes - ensures monotonicity and full-scale linearity for precision measurement applications. |
| Sampling Rate | 150ksps maximum - supports real-time acquisition of signals up to ~30kHz full-linear bandwidth. |
| Supply Current | 450µA typical at 150ksps; drops to 10µA at 1ksps - enables ultra-low-power operation in sleep-aware embedded systems. |
| INL Error | ±1 LSB over full temperature range - maintains end-point accuracy without calibration in industrial environments. |
| SNR / THD | 72dB SNR and −86dB THD at 1kHz - suitable for medium-fidelity sensor digitization where harmonic distortion must be minimized. |
| Analog Input Range | 0V to VREF (1V–3.6V) differential - allows direct interface to low-voltage sensors or op-amp outputs without gain staging. |
| Reference Input | External VREF pin supports 1V–VCC range - enables ratiometric measurements or precision voltage referencing independent of supply. |
Pinout & Package
Package: 8-lead plastic SO (Small Outline, narrow 0.150-inch body). Pin pitch: 0.050 inch (1.27 mm). RoHS-compliant, Pb-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Defines full-scale span; must be low-noise and bypassed to GND with ≥1µF capacitor - critical for absolute accuracy and ratiometric stability. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN−; accepts voltages from −0.05V to VCC+0.05V - enables direct connection to transducer outputs. |
| IN− (Pin 3) | Differential Analog Input (−) | Paired with IN+; common-mode rejection suppresses noise - supports true differential or pseudo-differential configurations. |
| GND (Pin 4) | Analog Ground | Primary ground reference for analog circuitry; must connect directly to analog ground plane - prevents digital noise coupling into conversion path. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; held high after completion to enter auto-shutdown - simplifies timing control and reduces idle power. |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI/MICROWIRE-compatible output; data valid on SCK falling edge - interoperable with standard microcontroller peripherals. |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; no minimum frequency required - supports burst reads and low-power polling modes. |
| VCC (Pin 8) | Positive Supply | 2.7V–3.6V single supply; requires local 1µF tantalum bypass to GND - ensures stable reference and analog core operation. |
Key Features
| Feature | Design Value |
|---|---|
| True Differential Input Architecture | Rejects common-mode noise on IN+/IN− pair - improves immunity in noisy industrial or portable environments without external instrumentation amps. |
| Auto-Power-Down Between Conversions | Reduces supply current from 450µA to 10µA at 1ksps - extends battery life in intermittent-sampling applications like environmental monitors. |
| Flexible Reference Support | VREF pin accepts 1V–VCC (up to 3.6V) - enables ratiometric sensing with resistive bridges or precision external references (e.g., LT1460). |
| No Minimum Data Transfer Rate | Operates down to DC clocking - allows software-controlled variable sampling intervals and eliminates need for fixed-rate timing hardware. |
| Industrial Temperature Range | Specified from −40°C to +85°C - ensures reliable performance in automotive cabin modules, industrial PLC I/O, and outdoor sensor nodes. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitoring unit logging temperature, pressure, and humidity over weeks using intermittent 10Hz sampling. IC Role / Device Role / Timing Role: Primary ADC digitizing conditioned analog sensor outputs with minimal power overhead during sleep cycles. Use Value: 10µA shutdown current and no-minimum-clock operation enable multi-week battery life without complex power sequencing. | Use Scenario: DIN-rail mounted analog input module acquiring 4–20mA loop signals in factory automation systems. IC Role / Device Role / Timing Role: High-accuracy front-end ADC converting isolated current-loop outputs to digital values for PLC communication. Use Value: ±1 LSB INL and true differential input allow direct interface to isolation amplifiers without trimming, reducing BOM count and calibration effort. |
| Medical Instrumentation | Isolated Remote Monitoring |
Use Scenario: Handheld ECG device measuring low-amplitude biopotentials with galvanic isolation and low-noise front-end. IC Role / Device Role / Timing Role: Final-stage ADC capturing filtered, amplified differential electrode signals before digital processing. Use Value: 72dB SNR and 30kHz full-linear bandwidth preserve diagnostic waveform fidelity while enabling compact PCB layout. | Use Scenario: Wireless vibration sensor node deployed on rotating machinery, transmitting FFT data over LoRaWAN. IC Role / Device Role / Timing Role: Low-power ADC sampling accelerometer outputs at configurable rates before RF transmission. Use Value: External VREF support allows ratiometric scaling with onboard precision voltage reference, eliminating drift from supply variations in remote locations. |
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 |
|---|---|---|---|
| LTC1864LIS8#TRPBF | 16-bit resolution, same 150ksps rate and SO-8 package; higher 1.22mW power dissipation; identical pinout and interface. | Used where higher resolution is prioritized over power budget - e.g., precision calibration equipment requiring <0.5 LSB INL. | Select when 16-bit resolution justifies ~2.7× higher power and tighter layout tolerances for reference decoupling. |
| ADS7822U | 12-bit, 200ksps, 3V supply, but uses 4-wire SPI (separate SDI/SDO); no auto-shutdown; SO-8 package; TI-manufactured. | Preferred in TI-centric designs with existing SPI infrastructure; lacks differential input - requires external MUX or amplifier for dual-channel use. | Choose when system already uses TI's ADS78xx family and differential input is not required; verify layout for higher 1.2mA active current. |
Compared with LTC1860LIS8#TRPBF, LTC1864LIS8#TRPBF delivers 4-bit higher resolution at identical speed and footprint but consumes more power, while ADS7822U offers faster sampling and TI ecosystem alignment but sacrifices differential input capability and autonomous power management.
Availability
LTC1860LIS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and isolated remote monitoring requiring stable component supply across extended production lifecycles.
Supply support for LTC1860LIS8#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. (ADI) 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 ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for ultra-low-power, high-resolution ADC applications in space- and energy-constrained systems.
FAQ
What is the operating temperature range for the LTC1860LIS8#TRPBF?
The LTC1860LIS8#TRPBF is rated for operation from −40°C to +85°C (industrial grade). This range is explicitly specified in the "Order Information" section of the datasheet under the "LTC1860LIS8" part number, and all key AC/DC specifications - including INL, supply current, and SNR - are guaranteed across this full interval.
Does the LTC1860LIS8#TRPBF require an external reference voltage?
Yes, the LTC1860LIS8#TRPBF requires an external reference voltage applied to the VREF pin (Pin 1). It does not include an internal reference. The device supports VREF from 1V to VCC (up to 3.6V), enabling ratiometric measurements or use with precision external references such as the LT1460 series.
Can the LTC1860LIS8#TRPBF interface directly with a microcontroller's SPI peripheral?
Yes, the LTC1860LIS8#TRPBF is SPI/MICROWIRE-compatible with a 3-wire interface (SCK, SDO, CONV). It requires no SDI line and has no minimum clock frequency, allowing direct connection to most MCU SPI peripherals in master mode - with CONV replacing CS and SDO used for data output only.
What is the maximum analog input voltage range for the LTC1860LIS8#TRPBF?
The LTC1860LIS8#TRPBF accepts a differential input voltage range of 0V to VREF across IN+ and IN−. Absolute input limits are IN+ = −0.05V to VCC+0.05V and IN− = −0.05V to VCC/2. For rail-to-rail operation, tie IN− to GND and VREF to VCC - yielding a 0V to VCC unipolar span.
How does the auto-shutdown feature work on the LTC1860LIS8#TRPBF?
The LTC1860LIS8#TRPBF automatically enters low-power shutdown when CONV remains high after conversion completion. At 1ksps, this reduces supply current from 450µA to 10µA. The device wakes instantly on the next CONV rising edge - eliminating startup delays and enabling precise, event-triggered sampling without external power control logic.
LTC1860LIS8#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860LIS8#TRPBF FAQ
1.How can I place an order for LTC1860LIS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LIS8#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 LTC1860LIS8#TRPBF reliable?
The price and inventory of LTC1860LIS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LIS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860LIS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LIS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LIS8#TRPBF?
LTC1860LIS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LIS8#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 LTC1860LIS8#TRPBF?
For technical support, including LTC1860LIS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LIS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860LIS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LIS8#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 LTC1860LIS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860LIS8#TRPBF?
All LTC1860LIS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LIS8#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 LTC1860LIS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860LIS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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