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Analog Devices Inc. LTC1864CMS8#PBF
- Part No.:
- LTC1864CMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864CMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:382
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Product details
Overview
LTC1864CMS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with true differential analog inputs, single 5V supply operation, and auto-shutdown reducing supply current to 2μA at 1ksps. It features an adjustable reference input (1V to VCC), high-impedance analog inputs, and SPI/MICROWIRE-compatible 3-wire serial interface - used in portable instrumentation and isolated data acquisition systems where precision, low power, and compact MSOP packaging are critical.
For engineers reviewing the LTC1864CMS8#PBF datasheet, LTC1864CMS8#PBF pinout, LTC1864CMS8#PBF application, or LTC1864CMS8#PBF equivalent, key selection criteria include guaranteed operation to +70°C, 87dB SNR at DC–10kHz, ±2mV offset error (MSOP), 125kHz full linear bandwidth, and compatibility with ratiometric or external reference configurations in space-constrained, battery-powered measurement designs.
Technical Context
The LTC1864CMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input ranges up to VREF full scale. Its conversion cycle is initiated by a rising edge on CONV, with tCONV = 2.75–3.3μs (H-grade), and data is clocked out LSB-first on SDO synchronized to SCK falling edges.
It operates exclusively in 1-channel mode with fixed IN+/IN– differential input topology (no MUX), unlike the LTC1865. The MSOP-8 package uses shared GND for analog/digital domains, and VREF is externally applied - enabling flexible scaling from 1V to 5V full-scale spans without external gain stages.
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 Nyquist bandwidth |
| Supply Current | 850μA typical at 250ksps; drops to 2μA at 1ksps via auto-shutdown - enables multi-year battery life |
| SNR | 87dB - ensures >14 effective bits of dynamic resolution for low-noise sensor interfaces |
| INL Error | ±8 LSB (H-grade) - maintains monotonicity and linearity across full temperature range (0°C to 70°C) |
| Analog Input Range | Differential: 0V to VREF - allows direct connection to bridge sensors or op-amp outputs without level-shifting |
| Reference Range | 1V to 5V - supports low-voltage ratiometric sensing (e.g., 3.3V systems) or high-precision 5V references |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm body, 0.65mm pitch, exposed pad not present. Thermal resistance θJA = 210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VREF (Pin 1) | Reference voltage input | Defines full-scale span; must be low-noise and bypassed with ≥1μF to AGND |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance sampling node; accepts 0V to VREF relative to IN− |
| IN− (Pin 3) | Differential analog input (−) | Common-mode reference for IN+; rejects noise when both inputs share interference |
| GND (Pin 4) | Analog ground | Single-point return for VREF, IN+, IN−, and bypass capacitors - critical for PSRR & SNR |
| CONV (Pin 5) | Convert control input | Rising edge initiates conversion; held high after completion to enter sleep mode |
| SDO (Pin 6) | Serial data output | LSB-first 16-bit result; tri-stated when CONV = high or during conversion |
| SCK (Pin 7) | Serial clock input | Synchronizes data transfer; falling edge clocks data out, rising edge latches input (for LTC1865 only) |
| VCC (Pin 8) | Positive supply | 4.75V to 5.25V single supply; requires local 1μF tantalum bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| True differential input | Rejects common-mode noise up to 125kHz bandwidth - ideal for noisy industrial environments |
| Auto shutdown | Reduces ICC from 850μA to 2μA between conversions - extends battery runtime in intermittent-sampling systems |
| Adjustable reference (1V–5V) | Enables direct interfacing with low-voltage sensors or precision references without external dividers |
| Guaranteed operation to +70°C | Validated performance over commercial temperature range - suitable for non-automotive embedded instrumentation |
| SPI/MICROWIRE compatibility | Interoperates with standard microcontroller serial peripherals - no custom driver logic required |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter digitizing mV-level thermocouple or strain gauge outputs. IC Role / Device Role / Timing Role: Precision 16-bit ADC capturing differential sensor voltages with 87dB SNR and 125kHz linear bandwidth. Use Value: Eliminates external gain/level-shift circuitry due to 1V–5V adjustable reference and rail-to-rail input capability. | Use Scenario: Industrial sensor node transmitting analog measurements across opto-isolated or transformer-coupled links. IC Role / Device Role / Timing Role: Low-power ADC providing 250ksps sampling synchronized to isolated clock domain via CONV/SCK timing control. Use Value: Auto-shutdown reduces average current to <10μA at 100Hz sampling - extends node lifetime on primary batteries. |
| Low-Power Battery Monitoring | Medical Sensor Interface |
Use Scenario: Wearable device monitoring cell voltage, temperature, and current sense in lithium-ion battery packs. IC Role / Device Role / Timing Role: Differential ADC measuring shunt resistor voltage with ±2mV offset error and 16-bit resolution. Use Value: High-impedance inputs prevent loading of precision current-sense amplifiers; 1V reference support enables 3.3V system compatibility. | Use Scenario: Portable ECG front-end digitizing amplified biopotential signals with minimal added noise. IC Role / Device Role / Timing Role: 16-bit SAR converter acquiring differential lead-II signals at 250ksps with 87dB SNR. Use Value: Full linear bandwidth of 125kHz preserves QRS complex fidelity; MSOP-8 footprint saves PCB area in ultra-compact enclosures. |
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 |
|---|---|---|---|
| ADS8326IDGSR | 16-bit, 500ksps, 2.7–5.5V supply, internal reference option, SPI interface | Higher speed but higher ICC (2.5mA at 500ksps); no auto-shutdown below 100μA | Select for higher throughput where power budget permits; not drop-in due to different pinout and reference architecture |
| MAX11603EEE+ | 16-bit, 250ksps, 2.7–3.6V supply, internal reference, SPI interface, 10-pin μMAX | Lower voltage operation only; no external VREF support; smaller 3×3mm package but different pin assignment | Choose for 3.3V-only systems requiring integrated reference; requires layout revision and firmware adaptation |
Compared with ADS8326IDGSR and MAX11603EEE+, the LTC1864CMS8#PBF offers superior power efficiency at low sampling rates (2μA sleep), external reference flexibility (1V–5V), and proven MSOP-8 compatibility in space-constrained, battery-operated instrumentation - making it optimal when minimizing quiescent current and maintaining design reuse are priorities.
Availability
LTC1864CMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power battery monitoring requiring stable component supply, long-term manufacturability, and commercial-temperature-grade performance.
Supply support for LTC1864CMS8#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 acquired Linear Technology in 2017 and maintains its precision analog portfolio, including high-performance data converters, with global manufacturing and quality certification (ISO 9001, IATF 16949).
The LTC1864CMS8#PBF belongs to Linear's µPower SAR ADC family, designed specifically for compact, battery-powered measurement systems demanding 16-bit accuracy, sub-milliwatt active power, and robust noise immunity in harsh electrical environments.
FAQ
What is the maximum sampling frequency of the LTC1864CMS8#PBF?
The LTC1864CMS8#PBF achieves a maximum sampling frequency of 250ksps under recommended operating conditions (VCC = 4.75V to 5.25V, fSCK ≤ 16.7MHz). At this rate, conversion time is 2.75–3.3μs, and full linear bandwidth is specified at 125kHz - ensuring accurate digitization of signals up to the Nyquist limit without distortion.
Does the LTC1864CMS8#PBF support single-ended input configurations?
No, the LTC1864CMS8#PBF does not support single-ended inputs. It is strictly a true differential-input ADC with dedicated IN+ and IN− pins. Unlike the LTC1865, it lacks a multiplexer or software-selectable input mode. For single-ended applications, external signal conditioning (e.g., instrumentation amplifier) is required to convert to differential format before connection to LTC1864CMS8#PBF.
What is the supply current of the LTC1864CMS8#PBF at 1ksps?
At 1ksps, the LTC1864CMS8#PBF draws only 2μA typical supply current due to its auto-shutdown feature, which powers down the internal circuitry between conversions. This ultra-low quiescent current makes LTC1864CMS8#PBF especially suitable for energy-harvesting or coin-cell-powered devices where average power must remain below 10μW.
Can the LTC1864CMS8#PBF operate with a 3.3V reference voltage?
Yes, the LTC1864CMS8#PBF supports external reference voltages from 1V to VCC (5.25V max), so a 3.3V reference is fully compliant. When VREF = 3.3V, the differential input range becomes 0V to 3.3V full scale, and the LSB size is 50.8μV - enabling precise digitization of 3.3V-system sensors without level-shifting or attenuation networks.
Is the LTC1864CMS8#PBF pin-compatible with earlier 12-bit Linear ADCs?
Yes, the LTC1864CMS8#PBF is pin-compatible with the 12-bit LTC1860/LTC1861 in the MSOP-8 package, sharing identical pin functions (VREF, IN+, IN−, GND, CONV, SDO, SCK, VCC). This allows direct 16-bit resolution upgrades in existing designs without PCB changes - provided firmware handles the extended 16-bit data word and timing constraints.
LTC1864CMS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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-MSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1864CMS8#PBF FAQ
1.How can I place an order for LTC1864CMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864CMS8#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 LTC1864CMS8#PBF reliable?
The price and inventory of LTC1864CMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864CMS8#PBF is usually 5 days.
3.What payment methods are accepted for LTC1864CMS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864CMS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864CMS8#PBF?
LTC1864CMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864CMS8#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 LTC1864CMS8#PBF?
For technical support, including LTC1864CMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864CMS8#PBF requirements.
6.How does Aetrix verify that LTC1864CMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864CMS8#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 LTC1864CMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864CMS8#PBF?
All LTC1864CMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864CMS8#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 LTC1864CMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864CMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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