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Analog Devices Inc. LTC1864CS8#TRPBF
- Part No.:
- LTC1864CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1864CS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,045
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Product details
Overview
LTC1864CS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps single-channel successive approximation ADC in an 8-lead SOIC package, operating from a single 5V supply with 850μA typical supply current. It features true differential analog inputs (IN+, IN–), adjustable reference input (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and auto-shutdown between conversions to reduce power at lower sampling rates.
For engineers reviewing the LTC1864CS8#TRPBF datasheet, LTC1864CS8#TRPBF pinout, LTC1864CS8#TRPBF application, or LTC1864CS8#TRPBF equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain support for low-power, high-precision data acquisition in battery-operated and isolated systems.
Technical Context
The LTC1864CS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input ranges up to VREF full scale (1V to 5V). Its SO-8 package ties VREF internally to VCC, fixing the reference at 5V and enabling rail-to-rail input operation when IN– is grounded.
Conversion is initiated by a rising edge on CONV; after tCONV ≈ 3.2μs, data becomes available on SDO synchronized to SCK falling edges. The device enters sleep mode (2μA at 1ksps) when CONV remains high post-conversion, and supports full-duplex readout only in LTC1865 variants - the LTC1864CS8#TRPBF uses CONV-low to enable SDO output without SDI input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - provides 65,536 discrete output codes for high-precision measurement of small signal changes. |
| Max Sampling Rate | 250ksps - enables capture of signals up to 125kHz full-linear bandwidth per Nyquist criterion. |
| Supply Current | 850μA typ at 250ksps - allows continuous high-speed acquisition in compact, thermally constrained designs. |
| 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 noise-sensitive applications like sensor interfacing. |
| Analog Input Range | 0V to VREF (5V) differential - permits direct connection to transducer outputs without external gain or level-shifting. |
| Reference Configuration | VREF tied internally to VCC in SO-8 package - eliminates external reference component and simplifies BOM for fixed 5V systems. |
Pinout & Package
Package: 8-lead plastic SOIC (S8), 0°C to 70°C operating temperature range, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference Input | Tied internally to VCC in SO-8 package; defines full-scale span as 5V - no external reference required. |
| IN+ (Pin 2) | Differential Analog Input (+) | High-impedance input accepting 0V to 5V relative to IN–; rejects common-mode noise when paired with IN–. |
| IN– (Pin 3) | Differential Analog Input (–) | Reference node for differential measurement; grounding IN– enables single-ended 0V–5V input on IN+. |
| GND (Pin 4) | Analog Ground | Single ground connection for both analog and digital sections in SO-8 package - must tie directly to low-noise analog ground plane. |
| CONV (Pin 5) | Convert Control Input | Rising edge initiates conversion; held high post-conversion forces auto-shutdown to 2μA sleep current. |
| SDO (Pin 6) | Serial Data Output | 3-wire SPI/MICROWIRE-compatible output; data valid on falling SCK edge, captured on rising SCK edge. |
| SCK (Pin 7) | Serial Clock Input | Synchronizes data transfer; supports up to 20MHz clock frequency for fast readout timing. |
| VCC (Pin 8) | Positive Supply | Single 4.75V–5.25V supply powering analog and digital circuitry; requires ≥1μF tantalum bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces supply current to 2μA at 1ksps - extends battery life in portable instrumentation without software intervention. |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair - enables clean measurement in electrically noisy industrial environments. |
| 16-bit resolution with no missing codes | Guaranteed monotonic transfer function - critical for closed-loop control and precision calibration systems. |
| SO-8 package with internal VREF-to-VCC tie | Eliminates external reference IC and associated layout complexity - reduces PCB area and BOM count. |
| High impedance analog inputs | Accepts direct connection to low-output-impedance sensors (<200Ω source) - avoids need for buffer amplifiers in many applications. |
Applications
| Portable Data Loggers | Industrial Sensor Interfaces |
|---|---|
Use Scenario: Battery-powered environmental monitoring units logging temperature, pressure, and humidity over weeks on coin-cell power. IC Role / Device Role / Timing Role: Primary analog front-end ADC acquiring conditioned sensor outputs at 1–10ksps with minimal power overhead. Use Value: 850μA active current and 2μA sleep current enable multi-week operation; differential inputs reject EMI from nearby motors or RF sources. | Use Scenario: DIN-rail mounted PLC I/O modules measuring 4–20mA current loops and thermocouple outputs in factory automation. IC Role / Device Role / Timing Role: Isolated analog input channel digitizing field signals with galvanic separation and high CMRR. Use Value: True differential input and 87dB SNR ensure accurate representation of low-level sensor signals amid 50/60Hz mains noise. |
| Medical Instrumentation | Energy Metering Subsystems |
Use Scenario: Portable ECG or pulse oximeter devices requiring low-noise, low-power analog acquisition for FDA-cleared diagnostics. IC Role / Device Role / Timing Role: High-fidelity front-end digitizing biopotential signals with minimal added noise or distortion. Use Value: 87dB SNR and ±8 LSB INL meet clinical-grade accuracy requirements; SO-8 package supports compact, certified enclosure designs. | Use Scenario: Smart meter auxiliary channels measuring voltage/current harmonics and power quality parameters. IC Role / Device Role / Timing Role: Secondary ADC capturing waveform snapshots for FFT-based analysis alongside primary metrology IC. Use Value: 250ksps sampling supports 125kHz full-linear bandwidth - sufficient for 50th harmonic analysis at 50Hz fundamental. |
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 |
|---|---|---|---|
| ADS8325IDR | 16-bit, 100ksps, SPI interface, 2.7–5.5V supply, 3.5mW at 100ksps | Lower speed and higher power than LTC1864CS8#TRPBF; no auto-shutdown feature | Select when lower sampling rate suffices and TI ecosystem integration is preferred. |
| MAX11206ETE+ | 16-bit, 125ksps, SPI interface, 2.7–3.6V supply, 1.2mW at 125ksps | Lower supply voltage range; optimized for ultra-low-power sub-100ksps applications | Select for 3.3V-only systems where 250ksps is unnecessary and sleep current <1μA is critical. |
Compared with ADS8325IDR and MAX11206ETE+, the LTC1864CS8#TRPBF delivers 2.5× higher sampling rate at lower active current, maintains 5V compatibility, and integrates auto-shutdown - making it optimal for compact, battery-powered 250ksps acquisition where reference simplicity and thermal efficiency are prioritized.
Availability
LTC1864CS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor interfaces, and medical diagnostics requiring stable component supply with guaranteed 0°C to 70°C performance.
Supply support for LTC1864CS8#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 technologies, serving industrial, automotive, communications, and healthcare markets.
The LTC1864CS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for low-power, high-resolution sampling in space- and energy-constrained embedded systems.
FAQ
What is the maximum sampling rate supported by the LTC1864CS8#TRPBF?
The LTC1864CS8#TRPBF supports a maximum sampling rate of 250ksps, with guaranteed conversion time of 3.2μs. This enables full-linear bandwidth up to 125kHz and makes the LTC1864CS8#TRPBF suitable for applications requiring high-fidelity capture of fast-changing analog signals such as vibration monitoring or ultrasonic sensing.
Does the LTC1864CS8#TRPBF require an external voltage reference?
No - the LTC1864CS8#TRPBF SO-8 package internally ties VREF to VCC, fixing the reference at the supply voltage (4.75V–5.25V). This eliminates the need for an external reference IC, reducing BOM cost and board area. For systems requiring adjustable reference spans, the MSOP variants (e.g., LTC1864CMS8#TRPBF) support external VREF from 1V to VCC.
How does the auto-shutdown feature of the LTC1864CS8#TRPBF reduce power consumption?
The LTC1864CS8#TRPBF automatically powers down between conversions when CONV remains high, reducing supply current from 850μA at 250ksps to just 2μA at 1ksps. This dynamic scaling allows designers to maintain responsiveness while minimizing average power - especially valuable in duty-cycled or event-triggered acquisition systems using the LTC1864CS8#TRPBF.
What are the key layout recommendations for achieving optimal performance with the LTC1864CS8#TRPBF?
To achieve optimal performance with the LTC1864CS8#TRPBF, use a dedicated analog ground plane tied directly to Pin 4 (GND) with minimal trace length; bypass VCC and (if used externally) VREF with ≥1μF tantalum capacitors placed adjacent to the pins; keep analog input traces short and shielded from digital switching noise; and avoid wire-wrap prototyping - a 4-layer PCB with separate analog/digital planes is strongly recommended for SNR and INL compliance.
Is the LTC1864CS8#TRPBF pin-compatible with earlier 12-bit Linear Technology ADCs?
Yes - the LTC1864CS8#TRPBF is pin-compatible with the 12-bit LTC1860/LTC1861 family in the same SO-8 package, enabling a seamless 16-bit resolution upgrade without PCB redesign. This backward compatibility preserves existing layouts while delivering 16 effective bits of resolution, improved SNR, and enhanced linearity - all within identical footprint and pinout constraints of the LTC1864CS8#TRPBF.
LTC1864CS8#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:
- 1
- Input Type:
- Single Ended
- Data Interface:
- SPI
- Configuration:
- 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:
- -
LTC1864CS8#TRPBF FAQ
1.How can I place an order for LTC1864CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864CS8#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 LTC1864CS8#TRPBF reliable?
The price and inventory of LTC1864CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864CS8#TRPBF?
LTC1864CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864CS8#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 LTC1864CS8#TRPBF?
For technical support, including LTC1864CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864CS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864CS8#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 LTC1864CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864CS8#TRPBF?
All LTC1864CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864CS8#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 LTC1864CS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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