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Analog Devices Inc. LTC1860IMS8#TRPBF
- Part No.:
- LTC1860IMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1860IMS8#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,398
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Product details
Overview
LTC1860IMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 12-bit, single-channel, differential-input successive approximation ADC operating on a single 5V supply. It delivers 250ksps sampling rate with only 850µA typical supply current, auto-shutdown to 1nA between conversions, and supports adjustable external reference voltages from 1V to 5V. It is used in low-power portable instrumentation requiring high-resolution analog sensing with minimal power budget.
For engineers reviewing the LTC1860IMS8#TRPBF datasheet, LTC1860IMS8#TRPBF pinout, LTC1860IMS8#TRPBF application, or LTC1860IMS8#TRPBF equivalent, this page provides verified technical context, real-world design meaning for key specs, validated pin functions, confirmed application use cases, and two rigorously cross-checked alternative parts with documented functional and packaging differences.
Technical Context
The LTC1860IMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its true differential analog input (IN+, IN–) rejects common-mode noise, and its 3-wire SPI/MICROWIRE-compatible serial interface uses CONV to initiate conversion and control SDO enable timing.
It operates across –40°C to +85°C (I-grade), draws 850µA at 250ksps and drops to 1nA in auto-shutdown mode, and accepts VREF from 1V to VCC - enabling ratiometric or precision external reference configurations without gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - delivers 4096 discrete output codes for high-precision voltage measurement |
| Sampling Rate | 250ksps - supports real-time acquisition of signals up to ~125kHz full-linear bandwidth |
| Supply Current | 850µA typ at 250ksps - enables battery operation for >1 year in 10mA·h coin cells at 1ksps duty-cycled use |
| Reference Range | 1V to 5V - allows direct interface to low-voltage references (e.g., LT1460) or rail-to-rail operation when VREF = VCC |
| INL Error | ±1 LSB max - ensures monotonicity and <0.025% end-point linearity error over full scale |
| SNR | 72 dB - resolves signals down to ~250µV RMS noise floor with 5V full-scale input |
| Operating Temp | –40°C to +85°C - qualified for industrial ambient environments without derating |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0mm × 3.0mm body, 0.65mm pitch, exposed pad not present. RoHS-compliant, tape-and-reel (#TRPBF).
| 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 tantalum for stable 12-bit accuracy |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts 0V to VREF range relative to IN– |
| IN– (Pin 3) | Differential Analog Input (–) | Common-mode reference for IN+; both inputs reject noise when driven differentially |
| GND (Pin 4) | Analog Ground | Primary ground return for analog circuitry; must connect directly to low-impedance analog plane |
| CONV (Pin 5) | Convert Control Input | Rising edge starts conversion; held high after completion triggers auto-shutdown to 1nA sleep current |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI-compatible output; data valid on falling SCK edge; enabled only when CONV is low |
| SCK (Pin 7) | Serial Clock Input | Synchronizes 12-bit data transfer; max 20MHz clock (H-grade), 16.7MHz (I-grade) |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1µF bypass to GND to prevent conversion errors |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces idle current to 1nA, cutting average power by >99% in low-duty-cycle sampling systems |
| True differential input architecture | Rejects common-mode noise up to full bandwidth, eliminating need for external instrumentation amps in noisy environments |
| Adjustable reference input (1V–5V) | Enables direct connection to low-voltage precision references or ratiometric sensor bridges without level-shifting circuitry |
| Guaranteed operation to 125°C (H-grade variant) | Validates thermal robustness for industrial control nodes where ambient exceeds 85°C |
| Pin-compatible with LTC1864/LTC1865 | Allows seamless upgrade path to 16-bit resolution using identical PCB layout and footprint |
Applications
| Portable Medical Sensors | Industrial Process Monitoring |
|---|---|
Use Scenario: Battery-powered ECG front-end acquiring lead-II differential biopotentials at 250Hz–1kHz with ultra-low standby drain. IC Role / Device Role / Timing Role: 12-bit differential ADC digitizing microvolt-level signals while maintaining sub-µA sleep current between samples. Use Value: Enables >2-week battery life on CR2032 via 1nA shutdown current and eliminates external op-amp gain stages due to 1V–5V VREF flexibility. | Use Scenario: DIN-rail mounted temperature transmitter reading 4–20mA loop sensors and RTD bridges in factory automation cabinets. IC Role / Device Role / Timing Role: High-accuracy analog front-end ADC converting conditioned sensor outputs with ±1 LSB INL for 0.1% system calibration traceability. Use Value: Delivers 72dB SNR and 125kHz linear bandwidth to resolve fast transients in motor current monitoring without aliasing. |
| Isolated Data Acquisition Modules | Low-Power Remote Environmental Sensors |
Use Scenario: Galvanically isolated vibration monitor using optocoupled serial interface to transmit 250ksps accelerometer data across HV barriers. IC Role / Device Role / Timing Role: Isolated-side ADC providing precise digitization with minimal power draw to reduce heat in compact isolation enclosures. Use Value: 850µA active current and 1nA sleep current minimize isolated supply loading, extending lifetime of DC-DC bias converters. | Use Scenario: Solar-powered soil moisture node logging capacitance-based probe readings every 10 minutes in agricultural fields. IC Role / Device Role / Timing Role: Energy-constrained ADC performing single-shot 12-bit conversions triggered by microcontroller wake-up events. Use Value: Adjustable 1V reference allows direct interface to low-dropout LDOs, avoiding wasted headroom and maximizing usable battery voltage range. |
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 |
|---|---|---|---|
| LTC1864CMS8#PBF | 16-bit resolution, same 8-pin MSOP package, 250ksps, 1.3mA supply current, pin-compatible but higher power and resolution | Used where 16-bit precision is required and system can accommodate +0.45mA active current increase | Select LTC1864CMS8#PBF when absolute measurement accuracy demands <0.0015% FS error, not achievable with 12-bit LTC1860IMS8#TRPBF |
| ADS7822U | 12-bit, 200ksps, 2.7–5.25V supply, SPI interface, SO-8 package, 1.25mW typical power at 200ksps | SO-8 footprint differs; lacks auto-shutdown (350µA standby); requires external reference for full-scale tuning | Choose ADS7822U only if legacy SO-8 board space is fixed and 1nA shutdown is not required for system energy budget |
Compared with LTC1864CMS8#PBF and ADS7822U, the LTC1860IMS8#TRPBF uniquely balances 12-bit precision, 250ksps speed, and ultra-low 1nA shutdown current in an MSOP-8 package - making it optimal for energy-constrained, space-limited portable instrumentation where 16-bit resolution is unnecessary.
Availability
LTC1860IMS8#TRPBF is available at Aetrix Electronics and suitable for portable medical sensors, industrial process monitoring, isolated data acquisition modules, and low-power remote environmental sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LTC1860IMS8#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 acquired Linear Technology in 2017 and maintains full product support, datasheets, and application engineering for all Linear-branded precision analog ICs.
The LTC1860IMS8#TRPBF belongs to Linear's µPower SAR ADC family, designed specifically for battery-operated and space-constrained instrumentation that demands high resolution without sacrificing energy efficiency or signal integrity.
FAQ
What is the maximum sampling frequency of the LTC1860IMS8#TRPBF?
The LTC1860IMS8#TRPBF supports a maximum sampling frequency of 250ksps across its full –40°C to +85°C operating range. This is guaranteed for the I-grade version per the Recommended Operating Conditions table, with conversion time specified at 2.75–3.3µs and tSCK(max) = 16.7MHz. Performance remains stable without derating at elevated temperatures.
Does the LTC1860IMS8#TRPBF require an external reference voltage?
Yes, the LTC1860IMS8#TRPBF requires an external reference voltage applied to the VREF pin. It accepts 1V to 5V, enabling flexible configurations - including ratiometric operation with sensor bridges or precision referencing with devices like the LT1460. Unlike some ADCs, it has no internal reference and will not function without a valid VREF.
What is the shutdown current of the LTC1860IMS8#TRPBF?
The LTC1860IMS8#TRPBF achieves a typical shutdown current of 1nA when the CONV pin is held high after conversion completion. This auto-shutdown feature is inherent to the device architecture and requires no additional control logic - significantly reducing average power in duty-cycled systems such as wireless sensor nodes.
Can the LTC1860IMS8#TRPBF interface directly with a microcontroller SPI port?
Yes, the LTC1860IMS8#TRPBF is SPI/MICROWIRE-compatible and interfaces directly with standard microcontroller SPI peripherals. It uses a 3-wire interface (SCK, SDO, CONV) - no SDI line required - and outputs data on the falling edge of SCK, which aligns with common SPI mode 0/2 configurations. CONV replaces CS functionality.
What package type is used for the LTC1860IMS8#TRPBF?
The LTC1860IMS8#TRPBF uses an 8-lead plastic MSOP (MS8) package measuring 3.0mm × 3.0mm with 0.65mm lead pitch. It is RoHS-compliant, halogen-free, and supplied in tape-and-reel format (#TRPBF). The package includes no exposed thermal pad and is rated for 150°C maximum junction temperature.
LTC1860IMS8#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):
- 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 ~ 85°C
- Supplier Device Package:
- 8-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1860IMS8#TRPBF FAQ
1.How can I place an order for LTC1860IMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1860IMS8#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 LTC1860IMS8#TRPBF reliable?
The price and inventory of LTC1860IMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1860IMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1860IMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1860IMS8#TRPBF transactions.
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4.How is shipping managed for LTC1860IMS8#TRPBF?
LTC1860IMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1860IMS8#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 LTC1860IMS8#TRPBF?
For technical support, including LTC1860IMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1860IMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1860IMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1860IMS8#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 LTC1860IMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1860IMS8#TRPBF?
All LTC1860IMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1860IMS8#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 LTC1860IMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1860IMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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