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Analog Devices Inc. LTC1863LCGN#TRPBF
- Part No.:
- LTC1863LCGN#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LTC1863LCGN#TRPBF.pdf
- Description:
- IC ADC 12BIT SAR 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,176
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Product details
Overview
LTC1863LCGN#TRPBF from Analog Devices is a 12-bit, 8-channel, 175ksps successive-approximation ADC with SPI/MICROWIRE serial interface, internal 1.25V reference, and true differential input capability. It operates from a single 2.7V supply, draws 750µA at full speed, and supports unipolar (0V–2.5V) or bipolar (±1.25V) conversion modes in industrial process control and battery-operated data acquisition systems.
For engineers reviewing the LTC1863LCGN#TRPBF datasheet, LTC1863LCGN#TRPBF pinout, LTC1863LCGN#TRPBF application, or LTC1863LCGN#TRPBF equivalent, key selection criteria include guaranteed 2.7V operation, 16-pin narrow SSOP package, ±1LSB INL (unipolar), automatic nap mode power management, and compatibility with LTC1863/LTC1867 pinouts for design reuse.
Technical Context
The LTC1863LCGN#TRPBF implements a capacitive SAR architecture with differential sampling, using an internal 1.25V bandgap reference trimmed to ±10mV accuracy and buffered to 2.5V at REFCOMP. Its 8-channel analog multiplexer supports configurable single-ended or differential inputs via a 7-bit serial command word including SD (single/diff), OS (odd/sign), S1/S0 (address), COM (CH7/COM mode), UNI (unipolar/bipolar), and SLP (sleep enable).
Conversion timing is factory-trimmed: 3.2µs typical conversion time, 2.01µs minimum acquisition time (sample mode), and 80ms wake-up from SLEEP mode. Digital I/O complies with SPI/MICROWIRE protocols-CS/CONV initiates conversion and frames data transfer, SCK clocks up to 20MHz, SDO outputs straight binary (unipolar) or two's complement (bipolar), and SDI accepts configuration words on rising SCK edges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit - guarantees monotonic output and no missing codes across full temperature range |
| Sample Rate | 175ksps - enables real-time capture of signals up to 87.5kHz (Nyquist-limited) |
| INL (Unipolar) | ±1 LSB max - ensures ≤0.024% full-scale linearity error for precision sensor interfacing |
| Supply Voltage | 2.7V to 3.6V - supports direct connection to single-cell Li-ion or 3.3V logic rails without regulation |
| Quiescent Current | 750µA at 175ksps - enables <2.1mW total power consumption at 3V, critical for portable instrumentation |
| Input Range | 0V–2.5V (unipolar) or ±1.25V (bipolar) - matches common transducer outputs and op-amp swing limits |
| Reference | Internal 1.25V ±20ppm/°C - eliminates external reference component count while maintaining <0.025% drift over –40°C to +85°C |
Pinout & Package
Package: 16-lead narrow plastic SSOP (GN), 0°C to 70°C operating temperature range, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CH0–CH7/COM (Pins 1–8) | Analog input channels / common-mode reference | Configurable as eight single-ended inputs or four differential pairs; CH7/COM serves as dedicated minus input when COM bit = 1 |
| REFCOMP (Pin 9) | 2.5V reference buffer output | Requires 10µF + 0.1µF bypassing; supplies stable 2.5V for ADC core and can be overdriven externally for improved accuracy |
| VREF (Pin 10) | 1.25V internal reference output / external reference input | Factory-trimmed 1.25V ±10mV; 3kΩ series resistor allows external voltage injection to override internal reference |
| CS/CONV (Pin 11) | Conversion start / serial frame enable | Rising edge triggers conversion; low level enables serial data output on SDO during readback |
| SCK (Pin 12) | Serial clock input | Supports up to 20MHz clock rate; falling edge captures SDO data, rising edge latches SDI configuration bits |
| SDO (Pin 13) | Digital output | Outputs 12-bit result in straight binary (unipolar) or two's complement (bipolar); high-impedance when CS/CONV high |
| SDI (Pin 14) | Digital input | Accepts 7-bit configuration word defining channel, polarity, and sleep mode prior to next conversion |
| GND (Pin 15) | Analog and digital ground | Single ground plane required; decoupling capacitors must connect here to minimize noise coupling |
| VDD (Pin 16) | Power supply | 2.7V–3.6V analog/digital supply; requires 10µF + 0.1µF bypassing; powers internal reference and SAR core |
Key Features
| Feature | Design Value |
|---|---|
| Pin compatibility with LTC1863/LTC1867 | Enables drop-in replacement or mixed-sourcing within same PCB layout across 12-/16-bit variants |
| True differential input architecture | Rejects common-mode noise up to 112dB at 100kHz, critical for noisy industrial environments |
| Automatic nap mode between conversions | Reduces average current from 750µA to 170µA during idle periods, extending battery life in portable DAQ |
| On-chip 1.25V reference with ±20ppm/°C tempco | Eliminates need for external precision reference IC while maintaining <0.025% gain drift over temperature |
| Configurable unipolar/bipolar conversion | Supports both 0–2.5V sensor outputs and ±1.25V bridge amplifier signals without external level-shifting circuitry |
Applications
| Industrial Process Control | High-Speed Data Acquisition |
|---|---|
Use Scenario: Monitoring multi-point temperature, pressure, and flow sensors in PLC-based control cabinets with limited board space and thermal budget. IC Role / Device Role / Timing Role: 8-channel multiplexed ADC digitizing analog sensor outputs at 175ksps with 12-bit resolution and ±1LSB INL. Use Value: Single-chip solution reduces BOM count vs discrete mux+ADC designs; 2.7V operation enables direct use of 3.3V system rails without LDO overhead. | Use Scenario: Portable oscilloscope front-end capturing transient waveforms from vibration or acoustic sensors in field service tools. IC Role / Device Role / Timing Role: Low-power SAR ADC performing synchronized sampling across 8 channels with automatic nap mode between triggers. Use Value: 750µA active current and 170µA nap current extend battery runtime; differential inputs suppress EMI from motor drives or switching power supplies. |
| Battery-Operated Systems | Multiplexed Data Acquisition Systems |
Use Scenario: Wireless sensor node logging environmental parameters (CO₂, humidity, light) for months on a single coin cell. IC Role / Device Role / Timing Role: Micropower ADC converting sensor outputs only on scheduled intervals, entering SLEEP mode (<0.2µA) between measurements. Use Value: Sleep current of 0.2µA minimizes quiescent drain; internal reference avoids calibration drift from external components over shelf life. | Use Scenario: Modular test equipment where one main controller sequences measurements across multiple plug-in signal conditioning modules. IC Role / Device Role / Timing Role: SPI-configurable ADC accepting channel select commands from host MCU and returning results in fixed 12-bit format. Use Value: 7-bit SDI command word enables dynamic reconfiguration of input topology (SE/diff, unipolar/bipolar) without hardware changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-bit, 8-channel, serial-output ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 12-bit, 200ksps, SPI interface, 2.7–5.25V supply, no internal reference - requires external 2.5V ref | Higher sample rate but lacks integrated reference and differential input capability | Select when higher throughput is needed and external reference is already present in system |
| LTC1864LCGN#TRPBF | 16-bit, 175ksps, identical pinout/package, same internal reference, ±3LSB INL (bipolar) | Higher resolution for precision metrology; same footprint enables upgrade path without PCB change | Select when 16-bit resolution and 16-bit no-missing-codes guarantee are required for calibration-critical applications |
Compared with ADS7822U, LTC1863LCGN#TRPBF offers integrated reference and true differential inputs at lower power; compared with LTC1864LCGN#TRPBF, it trades resolution for lower cost and reduced post-processing overhead in 12-bit sensor applications.
Availability
LTC1863LCGN#TRPBF is available at Aetrix Electronics and suitable for industrial process control, battery-operated systems, and high-speed data acquisition requiring stable component supply, RoHS compliance, and long-term production support.
Supply support for LTC1863LCGN#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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1863L product line delivers micropower, multi-channel SAR ADCs optimized for space-constrained, low-voltage applications where integration of reference, MUX, and serial interface reduces system complexity and improves reliability.
FAQ
What is the guaranteed minimum supply voltage for reliable operation of the LTC1863LCGN#TRPBF?
The LTC1863LCGN#TRPBF is guaranteed to operate down to 2.7V across its full temperature range (0°C to 70°C). Below this voltage, conversion accuracy, timing, and reference stability are not assured. The device draws 750µA at 2.7V and 175ksps, making it suitable for direct connection to single-cell lithium batteries or regulated 3.3V rails without additional LDOs.
Does the LTC1863LCGN#TRPBF support true differential input measurements?
Yes, the LTC1863LCGN#TRPBF supports true differential inputs via its 8-channel multiplexer. When configured with SD=0 and COM=1, CH0–CH6 pair with CH7/COM as the common negative input; when SD=0 and COM=0, adjacent channels (CH0/CH1, CH2/CH3, etc.) form differential pairs. This architecture provides >112dB channel-to-channel isolation at 100kHz and rejects common-mode noise without external instrumentation amplifiers.
How does the internal reference of the LTC1863LCGN#TRPBF function, and can it be overridden?
The LTC1863LCGN#TRPBF integrates a factory-trimmed 1.25V bandgap reference accessible at VREF (Pin 10), with ±20ppm/°C tempco and ±10mV initial accuracy. It feeds a buffered 2.5V output at REFCOMP (Pin 9). A 3kΩ series resistor on VREF allows external voltage injection - tying VREF to GND enables use of an external 2.5V reference applied to REFCOMP for improved drift and accuracy in metrology-grade applications.
What is the purpose of the SLP bit in the LTC1863LCGN#TRPBF configuration word?
The SLP (Sleep) bit in the 7-bit SDI configuration word enables hardware-controlled low-power state. When SLP=1, the LTC1863LCGN#TRPBF enters SLEEP mode after conversion completion, reducing supply current to ≤0.2µA. Wake-up requires 80ms stabilization time before the next valid conversion. This feature is essential for ultra-low-duty-cycle battery-powered sensors where measurement intervals exceed seconds.
Is the LTC1863LCGN#TRPBF pin-compatible with other members of the LTC1863/LTC1867 family?
Yes, the LTC1863LCGN#TRPBF is fully pin-compatible with all LTC1863 and LTC1867 variants in the 16-lead narrow SSOP package, including LTC1863LIGN#TRPBF (–40°C to 85°C), LTC1867LCGN#TRPBF (16-bit), and LTC1867LIGN#TRPBF. Identical pin functions, timing, and electrical characteristics allow direct substitution or mixed sourcing without PCB redesign.
LTC1863LCGN#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 175k
- Number of Inputs:
- 8
- Input Type:
- Differential, 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, Internal
- Voltage - Supply, Analog:
- 2.7V ~ 3.6V
- Voltage - Supply, Digital:
- 2.7V ~ 3.6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 16-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1863LCGN#TRPBF FAQ
1.How can I place an order for LTC1863LCGN#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1863LCGN#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 LTC1863LCGN#TRPBF reliable?
The price and inventory of LTC1863LCGN#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1863LCGN#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1863LCGN#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1863LCGN#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1863LCGN#TRPBF?
LTC1863LCGN#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1863LCGN#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 LTC1863LCGN#TRPBF?
For technical support, including LTC1863LCGN#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1863LCGN#TRPBF requirements.
6.How does Aetrix verify that LTC1863LCGN#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1863LCGN#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 LTC1863LCGN#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1863LCGN#TRPBF?
All LTC1863LCGN#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1863LCGN#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 LTC1863LCGN#TRPBF part is unused and in its original packaging.
Return procedure for LTC1863LCGN#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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