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Analog Devices Inc. LTC1860LIMS8#TRPBF
- Part No.:
- LTC1860LIMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860LIMS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,837
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Product details
Overview
LTC1860LIMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, 150ksps single-channel successive approximation ADC with true differential analog inputs, external reference pin, and 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 to reduce current to 10µA at 1ksps. It targets low-power, high-speed data acquisition in portable instrumentation and isolated sensor interfaces.
For engineers reviewing the LTC1860LIMS8#TRPBF datasheet, LTC1860LIMS8#TRPBF pinout, LTC1860LIMS8#TRPBF application, or LTC1860LIMS8#TRPBF equivalent, key selection criteria include its MSOP-8 package, 12-bit resolution with ±1 LSB INL, differential input range up to VREF, 3.7µs conversion time, and compatibility with 3V ratiometric systems requiring minimal external support circuitry.
Technical Context
The LTC1860LIMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage accepts IN+ and IN− signals referenced to an externally supplied VREF (1V to VCC), enabling direct connection to transducer outputs without gain stages. The converter supports unipolar operation with full-scale spans as low as 1V.
Control is managed via a 3-wire serial interface: CONV initiates conversion and enables SDO output upon falling edge; SCK synchronizes data transfer; SDO outputs 12-bit results on falling clock edges. Conversion completes in 3.7–4.66µs, and no minimum data transfer rate is required - idle clocks yield zero-fill output after valid data.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12 bits - delivers 4096 discrete output codes for precise analog-to-digital quantization. |
| 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 battery-powered operation for >1 year with 100mAh coin cell at 50% duty cycle. |
| INL Error | ±1 LSB max - ensures monotonicity and accurate end-point linearity across full temperature range. |
| Conversion Time | 3.7–4.66 µs - defines minimum inter-conversion interval and supports tight timing control in deterministic systems. |
| Reference Input Range | 1 V to VCC - allows flexible scaling from low-voltage sensors (e.g., 1V bridge outputs) to rail-to-rail inputs when VREF = VCC. |
| SNR / SINAD | 72 dB / 72 dB @ 1kHz - provides >11.6 effective number of bits (ENOB) for medium-fidelity signal capture. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0 mm × 3.0 mm × 0.86 mm body, 0.65 mm pitch, exposed pad optional. RoHS-compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Sets full-scale span; must be low-noise and bypassed with ≥1µF tantalum to AGND; supports 1V–VCC range. |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance sampling node; accepts 0V to VCC + 0.05V; common-mode rejection improves noise immunity. |
| IN− (Pin 3) | Differential analog input (−) | Paired with IN+; absolute range −0.05V to VCC/2; enables true differential measurement and common-mode rejection. |
| GND (Pin 4) | Analog ground | Primary return path for analog circuitry; must connect directly to analog ground plane with minimal trace length. |
| CONV (Pin 5) | Convert control input | Rising edge starts conversion; falling edge enables SDO output; high state after conversion triggers auto-sleep mode. |
| SDO (Pin 6) | Serial data output | 3-wire SPI/MICROWIRE-compatible output; 12-bit result shifted out MSB-first on falling SCK edges. |
| SCK (Pin 7) | Serial clock input | Synchronizes data transfer; supports DC to 8 MHz; no minimum clock rate required for valid readout. |
| VCC (Pin 8) | Positive supply | 2.7V–3.6V single supply; requires local 1µF bypass to GND; ripple <10mVpp critical for SNR performance. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces supply current from 450µA @ 150ksps to 10µA @ 1ksps - eliminates need for external power gating logic. |
| True differential analog input | Rejects common-mode noise on IN+/IN− pair - enables clean measurement in electrically noisy environments (e.g., motor drives). |
| No minimum data transfer rate | Allows indefinite idle clocking after valid data - simplifies firmware timing and supports variable-rate sampling without protocol errors. |
| Low input leakage (±1µA) | Permits direct connection to high-impedance sources (e.g., thermocouples, piezoelectric sensors) without buffer amplifiers. |
| 12-bit no-missing-codes resolution | Guarantees monotonic transfer function across full operating temperature range - essential for closed-loop control accuracy. |
Applications
| Portable Data Loggers | Isolated Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitors logging temperature, humidity, and pressure over weeks using microcontroller-based wake-up cycles. IC Role / Device Role / Timing Role: Primary analog front-end ADC acquiring conditioned sensor outputs at 1–10ksps during brief active windows. Use Value: 450µA active current and 10µA sleep current extend battery life; differential inputs reject PCB-level noise from RF modules and switching regulators. | Use Scenario: Industrial current/voltage sensing across galvanic isolation barriers using optocouplers or digital isolators. IC Role / Device Role / Timing Role: Isolated-side ADC digitizing shunt voltage or CT secondary outputs with local 3V supply derived from isolated DC-DC converter. Use Value: External VREF allows ratiometric operation with isolated reference, eliminating drift from supply variations; 1V min reference supports low-power isolated supplies. |
| Compact Instrumentation Front-Ends | Low-Power Medical Sensors |
Use Scenario: Handheld multimeters or oscilloscope probes integrating signal conditioning, ADC, and Bluetooth LE wireless transmission. IC Role / Device Role / Timing Role: High-speed sampling ADC interfacing to op-amp gain stages before MCU-based FFT processing. Use Value: 150ksps rate supports 30kHz full-linear bandwidth; MSOP-8 footprint minimizes board area; SPI interface reduces MCU GPIO count. | Use Scenario: Wearable ECG or pulse oximetry patches acquiring biopotential signals with ultra-low power budget. IC Role / Device Role / Timing Role: Low-noise, low-power ADC capturing amplified bio-signals at 1–2ksps with adaptive sampling triggered by activity detection. Use Value: ±1 LSB INL ensures clinical-grade linearity; differential inputs reject motion-induced common-mode artifacts; 12-bit resolution captures subtle waveform features. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, low-power, serial-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1864LIMS8#TRPBF | 16-bit resolution, same 150ksps rate, identical MSOP-8 package and pinout, but higher 1.22mW power at full speed. | Used where higher dynamic range (>90dB SNR) is required, e.g., precision weigh scales or audio test equipment. | Select LTC1864LIMS8#TRPBF when ENOB >12.5 bits is mandatory; otherwise LTC1860LIMS8#TRPBF offers better power efficiency for 12-bit needs. |
| ADS7822U | 12-bit, 200ksps, SO-8 package, 2.7–5.25V supply, but no differential input - only pseudo-differential IN+/GND configuration. | Suitable for single-ended sensor outputs (e.g., RTDs with 3-wire compensation) where common-mode rejection is less critical. | Choose ADS7822U for cost-sensitive, single-ended designs needing marginally higher speed; LTC1860LIMS8#TRPBF remains preferred for true differential integrity. |
Compared with LTC1864LIMS8#TRPBF and ADS7822U, the LTC1860LIMS8#TRPBF uniquely balances 12-bit precision, true differential input capability, sub-500µA active current, and MSOP-8 footprint - making it optimal for space-constrained, battery-operated systems demanding noise-immune analog acquisition without over-specifying resolution.
Availability
LTC1860LIMS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated sensor interfaces, and compact medical devices requiring stable component supply and long-term manufacturability.
Supply support for LTC1860LIMS8#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1860LIMS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, designed specifically for low-power, high-speed, small-footprint ADC applications in battery-operated and space-constrained systems.
FAQ
What is the maximum clock frequency supported by the LTC1860LIMS8#TRPBF serial interface?
The LTC1860LIMS8#TRPBF supports a maximum SCK frequency of 8 MHz under recommended operating conditions. This allows full 12-bit readout in ≤1.5 µs, supporting system-level timing budgets for high-throughput data acquisition. Operation at lower frequencies is fully functional with no minimum rate requirement.
Does the LTC1860LIMS8#TRPBF require an external reference voltage, or can it operate ratiometrically?
The LTC1860LIMS8#TRPBF requires an external reference voltage applied to the VREF pin, which defines its full-scale range. It supports ratiometric operation when VREF is derived from the same supply as the sensor - for example, connecting VREF to a precision 2.5V reference or directly to VCC for rail-to-rail input scaling.
How does the auto-shutdown feature of the LTC1860LIMS8#TRPBF reduce power consumption?
The LTC1860LIMS8#TRPBF automatically powers down between conversions when the CONV pin remains high. At 1ksps sampling, this reduces supply current from 450µA to 10µA - a 45× reduction - without firmware intervention. This behavior is intrinsic to the internal bias and clock-gating architecture.
Can the LTC1860LIMS8#TRPBF interface directly with a microcontroller GPIO without level-shifting?
Yes - the LTC1860LIMS8#TRPBF digital I/O (CONV, SCK, SDO) is fully compatible with 2.7V–3.6V logic levels. With VCC = 3.0V, VIH is 1.9V min and VOL is 0.3V max, ensuring robust interfacing to modern 3V MCUs such as STM32L4, MSP430FR, or nRF52 series without level shifters.
What is the absolute input voltage range allowed on the IN+ and IN− pins of the LTC1860LIMS8#TRPBF?
The IN+ pin accepts voltages from −0.05V to VCC + 0.05V; the IN− pin accepts −0.05V to VCC/2. Exceeding these ranges risks parametric degradation or latch-up. For safe unipolar differential operation, keep (IN+ − IN−) within 0V to VREF, and ensure both pins remain within their respective absolute limits relative to GND.
LTC1860LIMS8#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:
- -40°C ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860LIMS8#TRPBF FAQ
1.How can I place an order for LTC1860LIMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860LIMS8#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 LTC1860LIMS8#TRPBF reliable?
The price and inventory of LTC1860LIMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860LIMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860LIMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860LIMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1860LIMS8#TRPBF?
LTC1860LIMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860LIMS8#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 LTC1860LIMS8#TRPBF?
For technical support, including LTC1860LIMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860LIMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860LIMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860LIMS8#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 LTC1860LIMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860LIMS8#TRPBF?
All LTC1860LIMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860LIMS8#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 LTC1860LIMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860LIMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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