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Analog Devices Inc. LTC1865AHMS#TRPBF
- Part No.:
- LTC1865AHMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865AHMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,372
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Product details
Overview
LTC1865AHMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps, 2-channel software-selectable multiplexed successive approximation ADC in a 10-lead MSOP package, operating on a single 5V supply with 850μA typical supply current and guaranteed operation from –40°C to +125°C. It features true differential analog inputs, SPI/MICROWIRE-compatible serial I/O, adjustable external reference input (1V to VCC), and auto shutdown reducing current to 2μA at 1ksps - ideal for high-precision, low-power industrial sensor interfaces.
For engineers reviewing the LTC1865AHMS#TRPBF datasheet, LTC1865AHMS#TRPBF pinout, LTC1865AHMS#TRPBF application, or LTC1865AHMS#TRPBF equivalent, this page delivers verified technical context, exact pin functions, real-world use cases in isolated data acquisition and battery-operated instrumentation, and validated alternative options for thermal-extended 16-bit ADC selection.
Technical Context
The LTC1865AHMS#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting both single-ended and differential input modes via a 2-bit software-configurable MUX. Its conversion timing is deterministic: tCONV = 2.75–3.3μs (H-grade), enabling precise synchronization in time-critical systems.
Digital interface compliance includes SPI/MICROWIRE-level timing (fSCK ≤ 16.7MHz for H-grade), full-duplex operation with SDI/SDO, and CONV-controlled power management - where high CONV asserts sleep mode and low CONV enables data readout. Reference flexibility (1V–5V external VREF for MSOP variant) supports ratiometric sensing and reduced-span signal conditioning without external gain stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 1 LSB = VREF/65536 quantization step for sub-millivolt precision in 5V full-scale systems. |
| Max Sampling Rate | 250ksps - supports Nyquist-limited bandwidth up to 125kHz (full linear BW) for vibration monitoring or motor control feedback. |
| Supply Current | 850μA typ @ 250ksps; drops to 2μA @ 1ksps - enables multi-year battery life in portable instrumentation with duty-cycled sampling. |
| INL Error | ±8.5 LSB (H-grade) - ensures monotonicity and <0.013% end-point linearity error over temperature for calibration-critical applications. |
| SNR | 87dB - provides >14.5 effective number of bits (ENOB) for clean signal capture in noisy industrial environments. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive sensors, downhole tools, and industrial PLC analog input modules. |
| Reference Range | 1V to VCC (5V) - allows direct connection to low-voltage transducers (e.g., 1.25V RTD bridges) without level-shifting circuitry. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm), exposed pad not electrically connected, θJA = 210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Input | Active-high trigger initiating conversion; held high post-conversion forces auto shutdown to 2μA sleep current. |
| CH0 | Analog Input Channel 0 (+) | Positive terminal for CH0 single-ended or differential pair; sampled simultaneously with CH1 or AGND per MUX configuration. |
| CH1 | Analog Input Channel 1 (+) | Positive terminal for CH1 single-ended or differential pair; supports true differential measurement between CH0/CH1. |
| AGND | Analog Ground | Primary analog reference plane; must be tied directly to PCB analog ground with minimal trace length to minimize noise coupling. |
| DGND | Digital Ground | Separate digital return path; internally connected to AGND but requires star grounding at single point to avoid digital switching noise. |
| SDI | Digital Data Input | Receives 2-bit MUX configuration word (SGL/DIFF + ODD/SIGN) on rising SCK edges after CONV goes low. |
| SDO | Digital Data Output | Transmits 16-bit conversion result MSB-first on falling SCK edges; tri-stated when CONV is high or during conversion. |
| SCK | Serial Clock Input | Master clock synchronizing full-duplex data transfer; max 16.7MHz for H-grade, with 40% duty cycle requirement. |
| VCC | Positive Supply | Single 4.75V–5.25V rail powering analog and digital sections; requires ≥1μF tantalum bypass to AGND close to pin. |
| VREF | Reference Input | Defines full-scale range (1V–5V); high-impedance input requiring low-noise source or dedicated reference IC (e.g., LT1021). |
Key Features
| Feature | Design Value |
|---|---|
| 2-Channel Software MUX | Selects between CH0, CH1, CH0–CH1 differential, or CH1–CH0 differential via 2-bit SDI command - eliminates external analog switches in dual-sensor systems. |
| Auto Shutdown Mode | Reduces ICC from 850μA to 2μA between conversions at 1ksps - cuts average power by >99% versus continuous operation. |
| True Differential Inputs | Rejects common-mode noise up to 125kHz bandwidth - critical for thermocouple or strain gauge measurements in EMI-heavy factory floors. |
| 16-Bit No-Missing-Codes | Guaranteed monotonicity across full temperature range - ensures reliable zero-crossing detection and closed-loop stability in servo controls. |
| H-Grade Temperature Rating | Specified performance from –40°C to +125°C - enables deployment in engine control units, power inverters, and oil/gas downhole electronics. |
Applications
| Industrial Sensor Interface | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Monitoring temperature, pressure, and flow in programmable logic controller (PLC) analog input modules deployed in manufacturing cells. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing 4–20mA loop signals and RTD bridges with ratiometric reference support. Use Value: ±8.5 LSB INL and 87dB SNR enable <0.02% total system accuracy over –40°C to +125°C without recalibration. |
Use Scenario: Digitizing sensor outputs across galvanic isolation barriers in motor drives and grid-tied inverters. IC Role / Device Role / Timing Role: High-speed, low-power ADC paired with digital isolators (e.g., ADuM1401) for SPI data transmission across isolation boundary. Use Value: 250ksps sampling and 2.75μs conversion time allow real-time current/voltage feedback for field-oriented control (FOC) algorithms. |
| Battery-Operated Instrumentation | High-Reliability Test Equipment |
|
Use Scenario: Portable multimeters and handheld oscilloscopes requiring multi-year battery life and sub-millivolt DC accuracy. IC Role / Device Role / Timing Role: Core ADC with auto shutdown and 1V–5V reference flexibility to accommodate diverse sensor front-ends and battery voltage decay. Use Value: 2μA sleep current at 1ksps extends CR2032 battery life beyond 5 years in low-duty-cycle logging applications. |
Use Scenario: Benchtop data loggers and automated test equipment (ATE) demanding long-term measurement stability and repeatability. IC Role / Device Role / Timing Role: Precision ADC in calibrated reference channels, leveraging guaranteed H-grade specs and low gain/offset drift (±20mV gain error). Use Value: 16-bit resolution with no missing codes ensures unambiguous code transitions during dynamic signal sweeps and calibration verification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8860IDRCT | 16-bit, 1MSPS, single-channel, 2.5V supply only; no internal MUX; lower power (0.5mW @ 100ksps) but no H-grade temp rating. | Best for high-speed single-sensor systems with tight PCB space and stable 2.5V rails - unsuitable for dual-channel or extended-temp industrial use. | Select when sampling rate >250ksps is required and temperature range is limited to –40°C to +85°C. |
| AD7689BCPZ-RL7 | 16-bit, 250ksps, 8-channel MUX, 5V supply; higher ICC (2.5mA @ 250ksps); specified only to +85°C (not H-grade). | Preferred for multi-sensor data loggers needing >2 channels; thermal derating required above +85°C - cannot replace LTC1865AHMS#TRPBF in +125°C environments. | Choose when channel count >2 is mandatory and extended temperature operation is not required. |
Compared with ADS8860IDRCT and AD7689BCPZ-RL7, the LTC1865AHMS#TRPBF uniquely combines 2-channel software MUX, H-grade temperature qualification, and ultra-low 850μA active current - making it the only drop-in solution for thermally demanding dual-sensor industrial nodes requiring long-term stability without forced air cooling.
Availability
LTC1865AHMS#TRPBF is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated data acquisition systems, and battery-operated instrumentation requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for LTC1865AHMS#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 LTC1865AHMS#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, engineered specifically for low-power, high-accuracy industrial and instrumentation applications where thermal robustness and signal integrity are non-negotiable.
FAQ
What is the maximum clock frequency supported by LTC1865AHMS#TRPBF for H-grade operation?
The LTC1865AHMS#TRPBF supports a maximum SCK frequency of 16.7MHz under H-grade conditions (–40°C to +125°C). This timing specification is guaranteed across the full temperature range and enables reliable 250ksps sampling with sufficient setup/hold margins. Exceeding 16.7MHz may cause data corruption or increased jitter in the conversion result.
Does LTC1865AHMS#TRPBF require an external reference, or can it operate with VCC as reference?
The LTC1865AHMS#TRPBF requires an external reference applied to the VREF pin - it does not internally tie VREF to VCC like the SO-8 version. The MSOP package supports VREF from 1V to 5V, enabling flexible ratiometric or precision reference configurations. Using VCC directly is not supported and will violate specifications.
How does the LTC1865AHMS#TRPBF handle channel selection during conversion?
The LTC1865AHMS#TRPBF uses a 2-bit configuration word shifted into SDI after CONV goes low: bits define SGL/DIFF and ODD/SIGN modes, selecting among CH0, CH1, CH0–CH1, or CH1–CH0. This software-selectable MUX eliminates external analog switches and allows dynamic reconfiguration between samples without hardware changes.
What is the guaranteed integral nonlinearity (INL) specification for LTC1865AHMS#TRPBF over temperature?
The LTC1865AHMS#TRPBF guarantees ±8.5 LSB INL over its full operating temperature range of –40°C to +125°C (H-grade). This specification ensures monotonic behavior and predictable end-point linearity error (<0.013%) in closed-loop control systems where code transitions must remain unambiguous across thermal extremes.
Can LTC1865AHMS#TRPBF be used in a fully isolated SPI interface design?
Yes - the LTC1865AHMS#TRPBF is commonly deployed with digital isolators (e.g., ADuM1401) on SCK, SDI, SDO, and CONV lines. Its CMOS-compatible I/O levels, 2.75μs conversion time, and deterministic timing make it well-suited for isolated data acquisition. Ensure AGND/DGND are tied at a single point on the isolated side and VREF is referenced locally.
LTC1865AHMS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 16
- Sampling Rate (Per Second):
- 250k
- Number of Inputs:
- 2
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- MUX-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 ~ 125°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865AHMS#TRPBF FAQ
1.How can I place an order for LTC1865AHMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865AHMS#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 LTC1865AHMS#TRPBF reliable?
The price and inventory of LTC1865AHMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865AHMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865AHMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865AHMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865AHMS#TRPBF?
LTC1865AHMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865AHMS#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 LTC1865AHMS#TRPBF?
For technical support, including LTC1865AHMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865AHMS#TRPBF requirements.
6.How does Aetrix verify that LTC1865AHMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865AHMS#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 LTC1865AHMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865AHMS#TRPBF?
All LTC1865AHMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865AHMS#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 LTC1865AHMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865AHMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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