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Analog Devices Inc. LTC1865CS8#TRPBF
- Part No.:
- LTC1865CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1865CS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,962
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Product details
Overview
LTC1865CS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC in an 8-lead SOIC package operating on a single 5V supply. It features software-selectable dual-channel multiplexing, adjustable reference input, and auto-shutdown reducing supply current to 2μA at 1ksps. It is used in portable instrumentation for high-resolution analog signal digitization with low power consumption.
For engineers reviewing the LTC1865CS8#TRPBF datasheet, LTC1865CS8#TRPBF pinout, LTC1865CS8#TRPBF application, or LTC1865CS8#TRPBF equivalent, key selection criteria include its 2-channel MUX capability in SO-8, guaranteed operation from 0°C to 70°C, SPI/MICROWIRE-compatible serial interface, and differential input architecture enabling noise rejection in isolated data acquisition systems.
Technical Context
The LTC1865CS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its 2-channel MUX is configured via a 2-bit word shifted into SDI during CONV low, supporting both single-ended and differential modes per Table 1 in the datasheet.
In the SO-8 variant, VREF is internally tied to VCC, fixing the full-scale span to VCC (5V), unlike the MSOP version which supports external reference voltages from 1V to VCC. Conversion time is guaranteed at ≤3.3μs, and timing is synchronized by SCK with full-duplex serial communication.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 distinct output codes for high-precision measurement |
| Max Sampling Rate | 250ksps - supports real-time capture of signals up to 125kHz full linear bandwidth |
| Supply Current | 850μA typical at 250ksps - enables battery-powered operation with minimal thermal load |
| INL Error | ±8 LSB max - ensures monotonicity and accurate end-point linearity across full temperature range |
| Signal-to-Noise Ratio | 87dB - provides >14.5 effective number of bits (ENOB) for clean signal representation |
| Reference Span | VREF = VCC (fixed in SO-8) - eliminates external reference component but ties full-scale to supply rail |
| Operating Temperature | 0°C to 70°C - qualified for commercial-grade embedded instrumentation applications |
Pinout & Package
Package: 8-lead plastic SOIC (SO-8), surface-mount, JEDEC standard outline, 150°C max junction temperature, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CONV | Convert Control Input | Active-high start trigger; falling edge enables SDO output and initiates serial readout |
| CH0 | Analog Input Channel 0 | Positive input for channel 0 in differential mode or single-ended input referenced to GND |
| CH1 | Analog Input Channel 1 | Positive input for channel 1 in differential mode or second single-ended input |
| GND | Analog Ground | Common return for analog circuitry; must be tied directly to analog ground plane |
| SDI | Serial Data Input | Receives 2-bit MUX configuration word on rising SCK edges after CONV goes low |
| SDO | Serial Data Output | Transmits 16-bit conversion result on falling SCK edges; tri-stated when CONV high |
| SCK | Serial Clock Input | Synchronizes full-duplex data transfer; supports up to 20MHz clock frequency |
| VCC | Positive Supply | Single 4.75V–5.25V supply; powers internal circuitry and serves as fixed reference source |
Key Features
| Feature | Design Value |
|---|---|
| Software-Selectable 2-Channel MUX | Enables flexible signal routing without external switches-reduces BOM count and PCB area |
| Auto Shutdown Between Conversions | Drops current to 2μA at 1ksps-extends battery life in intermittent-sampling applications |
| True Differential Input Architecture | Rejects common-mode noise on CH0/CH1 pairs-improves accuracy in electrically noisy environments |
| Single 5V Supply Operation | Eliminates need for dual or split supplies-simplifies power design and reduces system cost |
| SPI/MICROWIRE-Compatible Interface | Ensures drop-in compatibility with existing microcontroller peripheral drivers-reduces firmware integration effort |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or sensor logger acquiring voltage, temperature, or pressure signals. IC Role / Device Role / Timing Role: Primary 16-bit digitizer sampling two transducer outputs alternately via internal MUX. Use Value: 250ksps rate captures transient events; 850μA supply current enables >100-hour battery life at 1ksps duty cycle. | Use Scenario: Industrial sensor node transmitting analog measurements across opto-isolated or transformer-coupled barriers. IC Role / Device Role / Timing Role: High-accuracy front-end ADC converting isolated analog inputs before digital isolation. Use Value: Differential inputs reject ground-loop noise; SO-8 package simplifies creepage/clearance layout for reinforced isolation. |
| Low-Power Remote Monitoring | Compact Embedded Control |
Use Scenario: Wireless environmental monitor (e.g., soil moisture, air quality) deployed in field locations with solar/battery power. IC Role / Device Role / Timing Role: Low-duty-cycle ADC activated only during scheduled measurement windows. Use Value: Auto-shutdown reduces average current to <1μA between samples-maximizes energy harvesting efficiency. | Use Scenario: Motor control board requiring precise feedback from current shunts and position sensors within tight board space. IC Role / Device Role / Timing Role: Dual-input ADC digitizing phase current and rotor position signals synchronously. Use Value: Single SO-8 device replaces two discrete ADCs-reduces footprint and interconnect complexity. |
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 |
|---|---|---|---|
| ADS8325IPW | 16-bit, 100ksps, SPI interface, 3.3V supply only, no internal MUX | Lower speed and single-channel only; requires external MUX for dual inputs | Select when 3.3V system bias and lower power at reduced throughput are acceptable |
| MAX11603EEE+ | 16-bit, 200ksps, I²C interface, internal 2.048V reference, SO-8 | I²C bus simplifies wiring but limits max clock rate; fixed reference reduces flexibility | Select when I²C host interface and guaranteed reference stability outweigh SPI performance needs |
Compared with ADS8325IPW and MAX11603EEE+, the LTC1865CS8#TRPBF offers higher sampling rate (250ksps vs. 100/200ksps), native dual-channel MUX support eliminating external components, and 5V SPI compatibility-making it optimal for compact, battery-constrained systems needing fast, flexible analog input handling.
Availability
LTC1865CS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power remote monitoring requiring stable component supply and commercial-temperature-grade reliability.
Supply support for LTC1865CS8#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 LTC1865CS8#TRPBF belongs to ADI's legacy Linear Technology precision data converter product line, designed specifically for low-power, high-resolution signal digitization in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate of the LTC1865CS8#TRPBF?
The LTC1865CS8#TRPBF achieves a maximum sampling rate of 250ksps under recommended operating conditions (VCC = 5V, fSCK ≤ 20MHz). This rate is guaranteed for the SO-8 package across the 0°C to 70°C temperature range and enables full linear bandwidth up to 125kHz, making it suitable for dynamic signal capture in portable test equipment and sensor interfaces.
Does the LTC1865CS8#TRPBF support external reference voltage?
No, the LTC1865CS8#TRPBF does not support external reference voltage. In the SO-8 package variant, VREF is internally tied to VCC, fixing the full-scale input span to the supply voltage (4.75V to 5.25V). This differs from the MSOP versions (e.g., LTC1865CMS#TRPBF), which accept external references from 1V to VCC. Designers must ensure stable VCC regulation for accurate scaling.
How many analog input channels does the LTC1865CS8#TRPBF have?
The LTC1865CS8#TRPBF has two analog input channels (CH0 and CH1) selectable via a 2-bit software-configurable MUX. The MUX supports four configurations: single-ended CH0, single-ended CH1, differential CH0–CH1, and differential CH1–CH0. This dual-channel capability is implemented entirely within the SO-8 package without external components, distinguishing it from the single-channel LTC1864CS8#TRPBF.
What is the supply current of the LTC1865CS8#TRPBF at 250ksps?
The LTC1865CS8#TRPBF draws 850μA typical supply current at 250ksps, as specified in the DC electrical characteristics table. This value applies at TA = 25°C with VCC = 5V and includes active conversion and serial interface operation. Current drops significantly at lower sampling rates due to automatic shutdown between conversions-e.g., to 2μA at 1ksps-enabling ultra-low-power operation in duty-cycled systems.
Is the LTC1865CS8#TRPBF pin-compatible with other members of the LTC1864/LTC1865 family?
The LTC1865CS8#TRPBF shares the same 8-pin SOIC footprint and pinout as the LTC1864CS8#TRPBF, but functional differences exist: the LTC1865CS8#TRPBF uses pins 2 and 3 as CH0/CH1 with SDI on pin 5, whereas the LTC1864CS8#TRPBF uses pins 2 and 3 as IN+/IN– with no SDI. Thus, while physically compatible, direct substitution requires firmware and schematic validation to accommodate the MUX control and input routing differences.
LTC1865CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm 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:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1865CS8#TRPBF FAQ
1.How can I place an order for LTC1865CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1865CS8#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 LTC1865CS8#TRPBF reliable?
The price and inventory of LTC1865CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1865CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1865CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1865CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1865CS8#TRPBF?
LTC1865CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1865CS8#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 LTC1865CS8#TRPBF?
For technical support, including LTC1865CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1865CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1865CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1865CS8#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 LTC1865CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1865CS8#TRPBF?
All LTC1865CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1865CS8#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 LTC1865CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1865CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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