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Analog Devices Inc. LTC1865CMS#TRPBF
- Part No.:
- LTC1865CMS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1865CMS#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,769
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Product details
Overview
LTC1865CMS#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with integrated 2-channel software-selectable MUX and adjustable reference input, housed in a 10-lead MSOP package and operating from a single 5V supply. It features true differential analog inputs, SPI/MICROWIRE-compatible serial I/O, auto shutdown reducing supply current to 2μA at 1ksps, and guaranteed operation from 0°C to 70°C - ideal for portable instrumentation requiring high resolution and low power.
For engineers reviewing the LTC1865CMS#TRPBF datasheet, LTC1865CMS#TRPBF pinout, LTC1865CMS#TRPBF application, or LTC1865CMS#TRPBF equivalent, key selection criteria include its 16-bit resolution at 250ksps, 10-lead MSOP footprint, software-configurable dual-channel MUX, adjustable VREF input (1V to 5V), and differential input architecture enabling noise rejection in compact data acquisition systems.
Technical Context
The LTC1865CMS#TRPBF implements a switched-capacitor SAR architecture with on-chip sample-and-hold, supporting both single-ended and differential input modes via a 2-bit configuration word shifted into SDI. Its conversion timing is deterministic: tCONV = 3.2μs max at 250ksps, with full duplex serial communication synchronized by SCK.
It operates exclusively from a single 5V supply (4.75V–5.25V), draws only 850μA typical at full speed, and powers down automatically between conversions. The MSOP version provides independent AGND/DGND pins and supports external reference voltages from 1V to VCC - unlike the SO-8 variant where VREF is internally tied to VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision measurement of small signal variations. |
| Max Sampling Rate | 250ksps - enables real-time capture of signals up to 125kHz full linear bandwidth without aliasing. |
| Supply Current | 850μA typ at 250ksps; drops to 2μA at 1ksps - reduces battery load in portable systems and simplifies thermal management. |
| INL Error | ±8 LSB max - ensures monotonicity and accurate end-point linearity across full temperature range (0°C to 70°C). |
| Signal-to-Noise Ratio | 87 dB - supports >14-bit effective resolution in low-noise environments with proper layout and bypassing. |
| Reference Input Range | 1V to VCC (5V) - allows flexible scaling for sub-rail input spans without external gain stages. |
| Digital Interface | SPI/MICROWIRE-compatible 3-wire serial - interoperates with standard microcontrollers and FPGAs without protocol translation. |
Pinout & Package
Package: 10-Lead Plastic MSOP (3mm × 3mm, 0.5mm pitch), RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Control Input | Active-high start trigger; falling edge enables SDO output and initiates serial data transfer. |
| CH0 | Analog Input Channel 0 (+) | Positive input for channel 0 in differential mode or single-ended mode referenced to AGND. |
| CH1 | Analog Input Channel 1 (+) | Positive input for channel 1 in differential mode or single-ended mode referenced to AGND. |
| AGND | Analog Ground | Primary reference for analog circuitry; must be connected directly to low-impedance analog ground plane. |
| DGND | Digital Ground | Reference for digital I/O; should be tied to AGND at single point to minimize noise coupling. |
| SDI | Serial Data Input | Receives 2-bit MUX configuration word (SGL/DIFF and ODD/SIGN bits) on rising SCK edges after CONV goes low. |
| 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 | Master clock synchronizing full-duplex data transfer; supports up to 20MHz (H-grade) or 16.7MHz (C-grade). |
| VCC | Positive Supply | Single 4.75V–5.25V supply powering analog and digital sections; requires ≥1μF tantalum bypass to AGND. |
| VREF | Reference Voltage Input | Defines full-scale span (1V to 5V); must be low-noise and bypassed independently to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Enables dynamic routing of CH0/CH1 in single-ended or differential configurations via 2-bit SDI command - eliminates external multiplexer ICs and PCB routing complexity. |
| Auto Shutdown Between Conversions | Reduces average supply current from 850μA to ~2μA at 1ksps - extends battery life in intermittent-sampling applications like sensor nodes. |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pairs - improves SNR in electrically noisy industrial or motor-control environments. |
| Adjustable Reference Input (1V–5V) | Permits direct interface with low-voltage sensors (e.g., 1V-output thermocouple amps) without level-shifting or gain stages - saves board space and component cost. |
| Guaranteed Operation to +70°C | Validated performance over commercial temperature range - suitable for non-automotive embedded systems including test equipment and medical monitors. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitoring units measuring temperature, humidity, and pressure over extended deployments. IC Role / Device Role / Timing Role: Primary 16-bit ADC acquiring multi-sensor analog outputs via software-controlled MUX, with low-power sleep between samples. Use Value: 850μA active current and 2μA sleep current extend battery life to months; 10-lead MSOP minimizes PCB area in space-constrained enclosures. | Use Scenario: PLC analog input modules conditioning signals from 4–20mA transmitters and RTD bridges. IC Role / Device Role / Timing Role: High-resolution front-end digitizer with differential inputs rejecting EMI from adjacent motor drives and switching power supplies. Use Value: 87dB SNR and ±8 LSB INL ensure <0.02% measurement accuracy; adjustable VREF accommodates varied sensor output ranges without recalibration. |
| Isolated Remote Acquisition | Compact Test Equipment |
Use Scenario: Galvanically isolated field-side data acquisition nodes transmitting measurements over RS-485 or CAN bus. IC Role / Device Role / Timing Role: Isolated-side ADC interfacing with precision op-amps driving CH0/CH1 differentially to reject ground-loop noise. Use Value: Independent AGND/DGND pins simplify isolation barrier design; SPI interface allows clean digital signal crossing via digital isolators. | Use Scenario: Handheld multimeters and oscilloscope probes requiring high DC accuracy and fast sampling for waveform capture. IC Role / Device Role / Timing Role: Core sampling engine delivering 250ksps at 16-bit resolution with minimal latency for real-time display rendering. Use Value: 3.2μs conversion time enables tight loop control in firmware; 10-lead MSOP eases integration into miniaturized probe heads. |
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, 10-lead VSSOP; requires external reference; no integrated MUX. | Higher speed but lacks on-chip MUX and adjustable VREF - demands additional components for multi-channel support. | Select when sampling rate >250ksps is mandatory and system can accommodate external reference and MUX. |
| MAX11192ETE+ | 16-bit, 500ksps, SPI, 12-lead TDFN; includes internal reference; no MUX; operates from 3.3V supply. | Lower supply voltage and integrated reference reduce BOM count, but fixed 3.3V operation limits compatibility with 5V sensor interfaces. | Select for 3.3V systems prioritizing reference integration over multi-channel flexibility. |
Compared with ADS8860IDRCT and MAX11192ETE+, the LTC1865CMS#TRPBF uniquely combines 250ksps sampling, on-chip 2-channel MUX, and 1V–5V adjustable reference in a 10-lead MSOP - making it optimal for cost-sensitive, space-constrained 5V systems needing flexible analog input routing without external support components.
Availability
LTC1865CMS#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, isolated remote acquisition, and compact test equipment requiring stable component supply and long-term manufacturability.
Supply support for LTC1865CMS#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 LTC1865CMS#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-resolution applications where size, accuracy, and supply efficiency are critical constraints.
FAQ
What is the maximum sampling frequency supported by the LTC1865CMS#TRPBF?
The LTC1865CMS#TRPBF supports a maximum sampling frequency of 250ksps under recommended operating conditions (VCC = 5V, TA = 25°C). At this rate, conversion time is guaranteed ≤3.2μs. Performance remains valid across the full 0°C to 70°C temperature range, though timing margins tighten slightly at extremes.
Does the LTC1865CMS#TRPBF require an external reference voltage?
No - the LTC1865CMS#TRPBF accepts an external reference voltage on the VREF pin (1V to 5V), but does not require one: it can operate ratiometrically using VCC as reference if VREF is tied to VCC. However, for best accuracy and noise immunity, a clean, low-impedance external reference is recommended.
How does the software-selectable MUX in the LTC1865CMS#TRPBF work?
The LTC1865CMS#TRPBF uses a 2-bit configuration word shifted into SDI after CONV goes low to select among four input modes: single-ended CH0, single-ended CH1, differential CH0–CH1, or differential CH1–CH0. This occurs before each conversion, enabling dynamic channel selection without hardware reconfiguration.
What is the purpose of separate AGND and DGND pins on the LTC1865CMS#TRPBF?
The separate AGND and DGND pins on the LTC1865CMS#TRPBF allow physical separation of analog and digital return paths on the PCB. They must be tied together at a single point near the device to prevent digital switching noise from modulating the analog ground reference - a critical practice for achieving specified 87dB SNR and ±8 LSB INL.
Can the LTC1865CMS#TRPBF operate from a 3.3V supply?
No - the LTC1865CMS#TRPBF is specified only for 4.75V to 5.25V operation per Absolute Maximum Ratings and Recommended Operating Conditions. Attempting 3.3V operation violates datasheet specifications and will result in undefined behavior, including failure to meet timing, resolution, or accuracy guarantees.
LTC1865CMS#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:
- 0°C ~ 70°C
- Supplier Device Package:
- 10-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865CMS#TRPBF FAQ
1.How can I place an order for LTC1865CMS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865CMS#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 LTC1865CMS#TRPBF reliable?
The price and inventory of LTC1865CMS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865CMS#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865CMS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865CMS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865CMS#TRPBF?
LTC1865CMS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865CMS#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 LTC1865CMS#TRPBF?
For technical support, including LTC1865CMS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865CMS#TRPBF requirements.
6.How does Aetrix verify that LTC1865CMS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865CMS#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 LTC1865CMS#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865CMS#TRPBF?
All LTC1865CMS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865CMS#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 LTC1865CMS#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865CMS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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