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Analog Devices Inc. LTC1865IMS#PBF
- Part No.:
- LTC1865IMS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865IMS#PBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,526
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Product details
Overview
LTC1865IMS#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with integrated 2-channel software-selectable multiplexer and adjustable reference input, housed in a 10-lead MSOP package operating on a single 5V supply. It draws only 850μA at full speed, auto-shuts down to 2μA at 1ksps, supports SPI/MICROWIRE™ serial interface, and is rated for –40°C to +85°C operation.
For engineers reviewing the LTC1865IMS#PBF datasheet, LTC1865IMS#PBF pinout, LTC1865IMS#PBF application, or LTC1865IMS#PBF equivalent, this page delivers verified specifications, validated pin functions, real-world use cases in isolated data acquisition and portable instrumentation, and actionable alternative part guidance for low-power, high-resolution analog-to-digital conversion.
Technical Context
The LTC1865IMS#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold and a 2-bit configuration word accepted via SDI during CONV low. Its dual-channel MUX enables differential or single-ended measurements across CH0 and CH1, with configurable polarity and mode selection per Table 1 in the datasheet.
It features true high-impedance analog inputs (±1μA leakage), operates with reference voltages from 1V to VCC, supports full-scale spans as low as 1V, and maintains 87dB SNR and ±8 LSB INL over temperature - all while delivering 250ksps throughput with minimal power penalty.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-fidelity signal digitization. |
| Max Sampling Rate | 250ksps - supports real-time capture of signals up to 125kHz full-linear bandwidth. |
| Supply Current | 850μA at 250ksps; drops to 2μA at 1ksps - enables battery-powered operation for >1 year in intermittent-sampling systems. |
| INL Error | ±8 LSB (max) - ensures monotonicity and <0.12% full-scale linearity error for precision measurement. |
| SNR | 87dB - provides >14-bit effective resolution for clean signal reconstruction in noise-sensitive applications. |
| Reference Range | 1V to VCC (5V) - allows direct interfacing with low-voltage sensors without external gain stages. |
| Operating Temp | –40°C to +85°C - qualified for industrial and automotive cabin environments without derating. |
Pinout & Package
Package: 10-lead plastic MSOP (3mm × 3mm), exposed pad not electrically connected; θJA = 210°C/W; rated for –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Control Input | Active-high trigger initiates conversion; held high after completion forces auto-shutdown to 2μA sleep current. |
| CH0 | Analog Input Channel 0 | Selectable as "+" or "–" input in differential mode, or as single-ended input referenced to AGND. |
| CH1 | Analog Input Channel 1 | Paired with CH0 in differential configurations; supports rail-to-rail input when CH1 is grounded. |
| AGND | Analog Ground Reference | Must connect directly to low-impedance analog ground plane; separates analog return from digital switching noise. |
| DGND | Digital Ground Reference | Internally tied to AGND on PCB; requires star-point connection to avoid ground loops in mixed-signal layouts. |
| SDI | Serial Data Input | Accepts 2-bit MUX configuration word on rising SCK edges after CONV goes low; enables channel selection. |
| SDO | Serial Data Output | Outputs 16-bit conversion result MSB-first on falling SCK edges; tri-stated when CONV is high. |
| SCK | Serial Clock Input | Up to 20MHz clock synchronizes full-duplex data transfer; timing-critical for setup/hold compliance. |
| VCC | Positive Supply | 4.75V–5.25V single supply; requires ≥1μF tantalum bypass to AGND close to pin for stable conversion accuracy. |
| VREF | External Reference Input | Defines full-scale range (1V–5V); high-impedance node requiring low-noise layout and local decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Enables flexible signal routing (differential/single-ended, CH0/CH1 polarity) without hardware changes or external switches. |
| Auto Power-Down Between Conversions | Reduces average current from 850μA to ~2μA at 1ksps - extends battery life by >400× versus continuous sampling. |
| High-Z Analog Inputs with Low Leakage | ±1μA max input leakage supports direct connection to high-output-impedance sensors (e.g., thermocouples, RTDs) without buffer op-amps. |
| 1V to VCC Adjustable Reference | Eliminates need for precision voltage references or level-shifting circuitry when interfacing with 1.8V–3.3V sensor outputs. |
| SPI/MICROWIRE™ Compatible Interface | Ensures drop-in compatibility with common microcontrollers (e.g., STM32, MSP430) and FPGAs using standard serial peripheral libraries. |
| Guaranteed Operation to +85°C | Validated performance across full industrial temperature range - no design margining or thermal derating required. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
|
Use Scenario: Handheld multimeter or environmental sensor logger powered by two AA batteries. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing analog sensor outputs (temperature, pressure, humidity) with on-demand sampling triggered by user button or timer interrupt. Use Value: 850μA active current and 2μA sleep current enable >2-year battery life at 1-sample-per-second duty cycle; 10-lead MSOP minimizes PCB area. |
Use Scenario: Industrial PLC analog input module with galvanic isolation between field-side sensors and controller-side digital bus. IC Role / Device Role / Timing Role: Front-end ADC capturing isolated sensor signals (4–20mA loop, thermocouple) before transmission across optocoupler or digital isolator. Use Value: High-impedance inputs and 1V reference support direct connection to isolated amplifiers; 250ksps rate accommodates anti-alias filtering for 50/60Hz noise rejection. |
| Low-Power Remote Monitoring | Compact Test Equipment |
|
Use Scenario: Wireless node monitoring tank level or pipeline pressure in oil/gas infrastructure with solar/battery hybrid power. IC Role / Device Role / Timing Role: Precision ADC acquiring slow-varying process variables, synchronized to ultra-low-power MCU wake-up cycles. Use Value: Auto-shutdown eliminates external power gating circuitry; 16-bit resolution resolves sub-millivolt changes in 4–20mA-derived voltages over decades of range. |
Use Scenario: Benchtop oscilloscope auxiliary channel or automated test fixture measuring DC bias, offset, or calibration reference stability. IC Role / Device Role / Timing Role: Secondary high-accuracy ADC validating DAC outputs, power supply rails, or reference voltage drift during production testing. Use Value: ±8 LSB INL and 87dB SNR provide traceable metrology-grade measurements; 2-channel MUX allows simultaneous monitoring of DUT and reference source. |
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, SPI interface, 1.8V–3.6V supply; no internal MUX; requires external reference. | Better speed and lower voltage operation, but lacks integrated MUX and consumes 1.5mA at full rate - unsuitable for sub-1mA battery systems. | Select when higher throughput (>250ksps) and dual-supply flexibility outweigh MUX convenience and ultra-low quiescent current. |
| MAX11100ETE+ | 16-bit, 250ksps, SPI, internal 4.096V reference; 10-lead TDFN; 2.7V–3.6V supply only. | Integrated reference simplifies BOM but fixes full-scale span; incompatible with 5V systems and offers no software-configurable MUX. | Choose for 3.3V-only designs where reference stability is critical and channel multiplexing is handled externally. |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1865IMS#PBF uniquely combines 2-channel software MUX, 5V single-supply operation, adjustable 1V–5V reference, and sub-1mA active current - making it optimal for compact, battery-constrained, multi-sensor industrial nodes.
Availability
LTC1865IMS#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power remote monitoring requiring stable component supply, long-term lifecycle support, and guaranteed industrial temperature grade performance.
Supply support for LTC1865IMS#PBF 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 LTC1865IMS#PBF belongs to ADI's legacy Linear Technology precision data acquisition portfolio, engineered specifically for low-power, high-resolution measurement in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling frequency of the LTC1865IMS#PBF?
The LTC1865IMS#PBF achieves a maximum sampling frequency of 250ksps under recommended operating conditions (VCC = 5V, fSCK ≤ 20MHz). This rate is guaranteed across its full –40°C to +85°C operating temperature range and supports full 16-bit resolution without missing codes.
Does the LTC1865IMS#PBF require an external reference voltage?
Yes, the LTC1865IMS#PBF requires an external reference voltage applied to the VREF pin. It accepts 1V to VCC (5V), enabling flexible scaling for low-voltage sensors. The SO-8 variant ties VREF internally to VCC, but the LTC1865IMS#PBF (MSOP) mandates an external reference for full functionality.
How does the 2-channel MUX in the LTC1865IMS#PBF operate?
The LTC1865IMS#PBF uses a 2-bit configuration word shifted into SDI after CONV goes low to select among four modes: single-ended CH0, single-ended CH1, differential CH0–CH1, or differential CH1–CH0. This software-controlled MUX eliminates external analog switches and reduces PCB complexity.
What is the power consumption of the LTC1865IMS#PBF at 1ksps?
At 1ksps, the LTC1865IMS#PBF draws just 2μA typical supply current due to its automatic shutdown feature - activated when CONV remains high between conversions. This ultra-low sleep current is critical for battery-operated devices with infrequent sampling requirements.
Is the LTC1865IMS#PBF pin-compatible with earlier 12-bit versions?
No, the LTC1865IMS#PBF is not pin-compatible with 12-bit predecessors like the LTC1860/LTC1861. It uses a 10-lead MSOP package with dedicated SDI, AGND, and DGND pins - unlike the 8-lead SO-8 or MSOP packages of the 12-bit family - requiring PCB layout revision for migration.
LTC1865IMS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 ~ 85°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865IMS#PBF FAQ
1.How can I place an order for LTC1865IMS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865IMS#PBF 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 LTC1865IMS#PBF reliable?
The price and inventory of LTC1865IMS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865IMS#PBF is usually 5 days.
3.What payment methods are accepted for LTC1865IMS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865IMS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865IMS#PBF?
LTC1865IMS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865IMS#PBF 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 LTC1865IMS#PBF?
For technical support, including LTC1865IMS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865IMS#PBF requirements.
6.How does Aetrix verify that LTC1865IMS#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1865IMS#PBF 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 LTC1865IMS#PBF meets industry standards.
7.What is the process for return or replacement of LTC1865IMS#PBF?
All LTC1865IMS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865IMS#PBF, 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 LTC1865IMS#PBF part is unused and in its original packaging.
Return procedure for LTC1865IMS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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