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Analog Devices Inc. LTC1864CMS8#TRPBF
- Part No.:
- LTC1864CMS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864CMS8#TRPBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,175
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Product details
Overview
LTC1864CMS8#TRPBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps single-channel differential successive approximation ADC in an 8-lead MSOP package, operating from a single 5V supply with 850μA typical supply current and auto-shutdown to 2μA at 1ksps. It features true differential analog inputs (IN+, IN–), adjustable external reference (VREF), SPI/MICROWIRE-compatible 3-wire serial interface, and guaranteed operation from 0°C to 70°C - ideal for compact, battery-powered data acquisition systems requiring high resolution without external gain stages.
For engineers reviewing the LTC1864CMS8#TRPBF datasheet, LTC1864CMS8#TRPBF pinout, LTC1864CMS8#TRPBF application, or LTC1864CMS8#TRPBF equivalent, key selection criteria include its 16-bit no-missing-codes resolution, ±8 LSB INL (H-grade), 87 dB SNR, 2.75 μs conversion time, and support for reduced full-scale spans down to 1V - enabling direct connection to low-output sensors and ratiometric measurement architectures.
Technical Context
The LTC1864CMS8#TRPBF implements a switched-capacitor SAR architecture with integrated sample-and-hold, supporting unipolar differential input ranges from 0V to VREF. Its conversion cycle is initiated by a rising edge on CONV, followed by tCONV = 2.75 μs (typ) for completion; leaving CONV high triggers automatic power-down, reducing current to leakage levels.
Digital interface uses a 3-wire SPI/MICROWIRE protocol: SCK synchronizes serial transfer, SDO outputs 16-bit data on falling edges, and CONV doubles as chip-select and enable for SDO. The device accepts external references from 1V to 5V and tolerates analog input common-mode voltages up to VCC/2, with high-impedance inputs (<±1 μA leakage) and 12 pF input capacitance in sample mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit with no missing codes - ensures monotonicity and full dynamic range utilization in precision measurement. |
| Sampling Rate | 250 ksps maximum - supports real-time capture of signals up to 125 kHz full linear bandwidth. |
| Supply Current | 850 μA at 250 ksps; drops to 2 μA at 1 ksps via auto-shutdown - enables multi-year battery life in portable instrumentation. |
| INL Error | ±8 LSB (guaranteed over temperature) - limits integral nonlinearity-induced measurement error to <0.12% of full scale. |
| SNR | 87 dB - delivers effective resolution of ~14.2 bits under ideal conditions, critical for low-noise sensor interfaces. |
| Conversion Time | 2.75 μs (typ) - defines minimum inter-conversion interval and supports tight timing control in synchronous systems. |
| Analog Input Range | 0V to VREF differential, with VREF programmable from 1V to 5V - allows direct interfacing to 1V-output MEMS sensors or rail-to-rail sources. |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3.0 mm × 3.0 mm × 0.85 mm body, exposed pad not electrically connected, 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 ≥1 μF to AGND - sets measurement accuracy and scaling factor. |
| IN+ (Pin 2) | Differential analog input (+) | High-impedance node (±1 μA leakage); sampled simultaneously with IN– for common-mode rejection - connects to signal source positive leg. |
| IN– (Pin 3) | Differential analog input (–) | Matches IN+ characteristics; enables true differential measurement and noise cancellation - ties to signal source negative leg or system ground. |
| GND (Pin 4) | Analog ground | Single-point connection to analog ground plane; separates analog return path from digital noise - critical for achieving 87 dB SNR. |
| CONV (Pin 5) | Convert start / SDO enable | Rising edge initiates conversion; falling edge enables SDO output - serves dual function to minimize pin count and simplify control logic. |
| SDO (Pin 6) | Serial data output | 3-state output driven on falling SCK edges; Hi-Z when CONV high - interfaces directly with MCU SPI MISO without level-shifting. |
| SCK (Pin 7) | Serial clock input | Accepts up to 20 MHz clock (H-grade); synchronizes bit transfer - determines maximum data throughput and timing margin. |
| VCC (Pin 8) | Positive supply | 4.75V to 5.25V operation; requires local 1 μF tantalum bypass to GND - powers analog and digital sections from single rail. |
Key Features
| Feature | Design Value |
|---|---|
| True differential input architecture | Rejects common-mode noise up to 125 kHz bandwidth, enabling clean measurements in electrically noisy industrial environments. |
| Auto-shutdown between conversions | Reduces average current from 850 μA to sub-μA levels at low sampling rates - extends battery life without firmware intervention. |
| 1V to 5V adjustable reference support | Permits direct interfacing with low-voltage sensors (e.g., 1.8V or 2.5V output transducers) without external level-shifting or gain amplification. |
| Guaranteed operation to +125°C (H-grade variants) | Validated performance across extended temperature range - suitable for automotive under-hood or industrial motor-control applications. |
| SPI/MICROWIRE™-compatible interface | Direct drop-in compatibility with standard microcontroller SPI peripherals, eliminating need for custom driver development. |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or environmental sensor logger powered by two AA batteries. IC Role / Device Role / Timing Role: Primary 16-bit ADC digitizing thermocouple, RTD, or pressure transducer outputs with ratiometric reference. Use Value: 850 μA active current and auto-shutdown enable >2-year battery life while maintaining 16-bit precision and 250 ksps burst capture capability. | Use Scenario: Industrial PLC analog input module with galvanic isolation between field-side sensors and controller bus. IC Role / Device Role / Timing Role: Isolated-side ADC converting 4–20 mA loop signals or ±10 V sensor outputs before opto-coupled or transformer-isolated transmission. Use Value: Differential input and high CMRR suppress ground-loop noise; 1V–5V VREF flexibility allows matching isolated reference voltage without additional regulators. |
| Low-Power Battery Monitoring | Medical Sensor Interface |
Use Scenario: Wearable health monitor measuring ECG or bioimpedance with coin-cell power budget. IC Role / Device Role / Timing Role: Front-end ADC acquiring biopotential signals with programmable gain eliminated by direct 1.2V reference and 0–1.2V input range. Use Value: 1V minimum VREF and 87 dB SNR enable high-fidelity acquisition of microvolt-level physiological signals without amplifier noise contribution. | Use Scenario: Point-of-care ultrasound probe with integrated analog front-end. IC Role / Device Role / Timing Role: Digitizing conditioned echo return signals in time-gain-controlled receive path with precise timing alignment. Use Value: 2.75 μs fixed conversion time and deterministic CONV-triggered timing allow tight synchronization with transmit pulses and beamforming clocks. |
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, 1 MSPS, SPI interface, 1.8V–3.6V supply; lower power (380 μA at 100 ksps) but requires external reference and has no auto-shutdown. | Targets ultra-low-voltage systems (e.g., energy-harvesting nodes); lacks integrated reference buffer and differential input flexibility. | Select when higher speed and lower supply voltage are mandatory, and external reference design is acceptable. |
| MAX11100ETE+ | 16-bit, 500 ksps, internal reference (4.096V), 2.7V–3.6V supply; includes internal oscillator but no auto-shutdown mode. | Optimized for compact medical devices using internal reference; incompatible with 5V-only systems and lacks VREF adjustability. | Choose for space-constrained designs needing guaranteed reference accuracy and simplified BOM, where 5V operation is not required. |
Compared with ADS8860IDRCT and MAX11100ETE+, the LTC1864CMS8#TRPBF uniquely balances 5V single-supply operation, adjustable reference (1V–5V), auto-shutdown, and true differential input - making it optimal for legacy 5V industrial and instrumentation designs requiring minimal layout change and proven reliability.
Availability
LTC1864CMS8#TRPBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and low-power battery monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant lead-free packaging.
Supply support for LTC1864CMS8#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 LTC1864CMS8#TRPBF belongs to ADI's precision data acquisition product line, designed specifically for low-power, high-resolution measurement systems where accuracy, small size, and single-supply simplicity are critical - such as handheld test equipment and distributed sensor networks.
FAQ
What is the maximum sampling frequency supported by the LTC1864CMS8#TRPBF?
The LTC1864CMS8#TRPBF supports a maximum sampling frequency of 250 ksps at 25°C and 234 ksps over the full –40°C to 125°C H-grade range. This is enabled by its 2.75 μs typical conversion time and 20 MHz SCK capability, allowing sustained high-speed acquisition without pipeline latency or aperture jitter penalties inherent in sigma-delta architectures.
Does the LTC1864CMS8#TRPBF require an external reference voltage?
Yes, the LTC1864CMS8#TRPBF requires an external reference voltage applied to the VREF pin, which defines its full-scale input range. It supports VREF from 1V to 5V, enabling flexible scaling for low-voltage sensors or ratiometric configurations. Unlike some competing ADCs, it does not include an internal reference, preserving accuracy and noise performance through user-controlled reference selection.
How does the auto-shutdown feature of the LTC1864CMS8#TRPBF reduce power consumption?
The LTC1864CMS8#TRPBF automatically enters low-power shutdown mode when the CONV pin remains high after conversion completion, reducing supply current from 850 μA (at 250 ksps) to just 2 μA at 1 ksps. This dynamic power scaling eliminates the need for software-controlled sleep modes, simplifying firmware and ensuring minimal quiescent draw during idle periods - a key advantage in battery-operated systems.
Can the LTC1864CMS8#TRPBF interface directly with a microcontroller's SPI peripheral?
Yes, the LTC1864CMS8#TRPBF features a SPI/MICROWIRE™-compatible 3-wire serial interface (SCK, SDO, CONV) that operates with standard MCU SPI hardware. CONV acts as chip select and data-enable, SDO drives on falling SCK edges, and no SDI line is needed - enabling seamless integration with most ARM Cortex-M, PIC, and ESP32 microcontrollers without bit-banging or custom timing logic.
What is the guaranteed integral nonlinearity (INL) specification for the LTC1864CMS8#TRPBF over temperature?
The LTC1864CMS8#TRPBF guarantees ±8 LSB INL over its full operating temperature range (0°C to 70°C for the C-grade version). This corresponds to <0.12% of full scale and ensures monotonic behavior and predictable measurement error across ambient conditions - critical for closed-loop control and calibration-sensitive instrumentation applications.
LTC1864CMS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-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:
- 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#TRPBF FAQ
1.How can I place an order for LTC1864CMS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864CMS8#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 LTC1864CMS8#TRPBF reliable?
The price and inventory of LTC1864CMS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864CMS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1864CMS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1864CMS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1864CMS8#TRPBF?
LTC1864CMS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864CMS8#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 LTC1864CMS8#TRPBF?
For technical support, including LTC1864CMS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864CMS8#TRPBF requirements.
6.How does Aetrix verify that LTC1864CMS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1864CMS8#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 LTC1864CMS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1864CMS8#TRPBF?
All LTC1864CMS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864CMS8#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 LTC1864CMS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1864CMS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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