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Analog Devices Inc. LTC1864ACMS8#PBF
- Part No.:
- LTC1864ACMS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
LTC1864ACMS8#PBF.pdf
- Description:
- IC ADC 16BIT SAR 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,065
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Product details
Overview
LTC1864ACMS8#PBF from Analog Devices (formerly Linear Technology) is a 16-bit, 250ksps successive approximation ADC with true differential analog inputs, adjustable reference input, and SPI/MICROWIRE-compatible serial interface in an 8-lead MSOP package. It operates on a single 5V supply, draws only 850μA at full speed, and auto-shuts down between conversions to reduce current to 2μA at 1ksps. It is used in portable instrumentation and isolated data acquisition systems requiring high resolution and low power.
For engineers reviewing the LTC1864ACMS8#PBF datasheet, LTC1864ACMS8#PBF pinout, LTC1864ACMS8#PBF application, or LTC1864ACMS8#PBF equivalent, key selection criteria include guaranteed operation from 0°C to 70°C, 87dB SNR, ±8 LSB INL (max), 2.75μs conversion time, and compatibility with ratiometric or external reference configurations.
Technical Context
The LTC1864ACMS8#PBF implements a switched-capacitor SAR architecture with integrated sample-and-hold. Its differential input stage rejects common-mode noise, and its adjustable VREF pin supports full-scale spans from 1V to 5V. The device uses a 3-wire serial interface where CONV initiates conversion and controls SDO output enable timing.
Conversion is triggered by a rising edge on CONV; after tCONV (2.75μs typ), the result is available for serial readout synchronized to SCK falling edges. Auto-power-down occurs when CONV remains high post-conversion, reducing supply current proportionally with sampling frequency - down to 2μA at 1ksps.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 16-bit - delivers 65,536 discrete output codes for high-precision measurement |
| Max Sampling Rate | 250ksps - supports real-time acquisition of signals up to 125kHz full-linear bandwidth |
| Supply Current @ 250ksps | 850μA typ - enables battery-powered operation with minimal thermal load |
| INL (Integral Nonlinearity) | ±8 LSB max - ensures monotonicity and accurate end-point linearity across temperature |
| SNR | 87dB - provides >14-bit effective resolution for clean signal digitization |
| Conversion Time | 2.75μs typ - defines minimum inter-conversion interval and system throughput latency |
| Reference Range | 1V to VCC - allows flexible scaling for low-voltage sensors without external gain stages |
Pinout & Package
Package: 8-lead plastic MSOP (MS8), 3mm × 3mm, 0.65mm pitch, exposed pad not present. Thermal resistance θJA = 210°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VREF (1) | Reference Input | Defines full-scale span; must be bypassed with ≥1μF to AGND for stable conversion accuracy |
| IN+ (2) | Differential Analog Input (+) | High-impedance input sampled simultaneously with IN–; accepts 0V to VCC range |
| IN– (3) | Differential Analog Input (–) | Common-mode rejection enabled when both IN+ and IN– are driven differentially |
| GND (4) | Analog Ground | Single-point connection to analog ground plane; critical for noise-sensitive performance |
| CONV (5) | Convert Control Input | Rising edge starts conversion; low level enables SDO output for serial readout |
| SDO (6) | Serial Data Output | 16-bit result shifted out MSB-first on SCK falling edges; tri-stated when CONV high |
| SCK (7) | Serial Clock Input | Master clock synchronizing data transfer; max frequency 20MHz (H-grade) |
| VCC (8) | Positive Supply | Single 4.75V–5.25V supply; requires local 1μF tantalum bypass to GND |
Key Features
| Feature | Design Value |
|---|---|
| Auto shutdown between conversions | Reduces ICC from 850μA @ 250ksps to 2μA @ 1ksps - eliminates need for external power gating logic |
| True differential input architecture | Rejects common-mode noise on IN+/IN– pair - enables direct connection to bridge sensors or isolated amplifiers |
| Adjustable reference input (1V–5V) | Supports ratiometric sensing or precision external references - avoids fixed-VREF design constraints |
| Guaranteed operation to +70°C | Validated performance over commercial temperature range - suitable for non-industrial embedded applications |
| SPI/MICROWIRE™-compatible interface | Interoperates with standard microcontroller SPI peripherals - no custom driver required |
Applications
| Portable Instrumentation | Isolated Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter or sensor logger powered by coin-cell or Li-ion battery. IC Role / Device Role / Timing Role: Primary ADC digitizing analog sensor outputs with minimal power overhead. Use Value: 850μA supply current at 250ksps and auto-shutdown extend battery life while maintaining 16-bit resolution. | Use Scenario: Industrial sensor node with galvanic isolation between analog front-end and digital host. IC Role / Device Role / Timing Role: High-resolution ADC placed on isolated side, interfacing via opto-coupled or transformer-isolated SPI lines. Use Value: Differential inputs reject common-mode transients induced by isolation barriers; 1V–5V VREF flexibility simplifies isolated reference design. |
| Compact Signal Conditioning | Low-Power Sensor Interface |
Use Scenario: Space-constrained PCB in medical wearable monitoring ECG/EMG signals. IC Role / Device Role / Timing Role: Front-end ADC capturing biopotential waveforms with DC-coupled differential input. Use Value: 87dB SNR and ±8 LSB INL ensure diagnostic-grade fidelity; MSOP-8 footprint saves board area vs SO-8. | Use Scenario: Battery-operated environmental sensor node measuring temperature, pressure, or gas concentration. IC Role / Device Role / Timing Role: ADC interfacing directly to low-output-impedance transducers (e.g., RTDs, strain gauges). Use Value: High-impedance inputs and 1V full-scale capability allow direct connection to millivolt-level sources without op-amp gain stages. |
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, ±1 LSB INL (max), 85dB SNR | Lower speed and resolution stability; requires external reference; no auto-shutdown | Select when lower power at sub-100ksps is acceptable and tighter INL is critical |
| MAX11603EEE+ | 16-bit, 200ksps, I²C interface, 2.7–3.6V supply, ±4 LSB INL (max), 86dB SNR | Lower voltage operation; I²C instead of SPI; no differential input; smaller temp range (–40°C to +85°C) | Select for ultra-low-voltage, space-constrained designs where I²C bus availability simplifies system integration |
Compared with ADS8325IDR and MAX11603EEE+, the LTC1864ACMS8#PBF offers higher sampling rate (250ksps), superior SNR (87dB), built-in auto-shutdown, and true differential inputs - making it optimal for precision, low-power, high-speed portable measurement systems.
Availability
LTC1864ACMS8#PBF is available at Aetrix Electronics and suitable for portable instrumentation, isolated data acquisition, and compact signal conditioning requiring stable component supply and guaranteed commercial-temperature performance.
Supply support for LTC1864ACMS8#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LTC1864ACMS8#PBF belongs to ADI's legacy Linear Technology precision data converter family, designed specifically for low-power, high-resolution measurement in space- and energy-constrained systems.
FAQ
What is the operating temperature range for the LTC1864ACMS8#PBF?
The LTC1864ACMS8#PBF is specified for operation from 0°C to +70°C. This commercial-grade temperature range is explicitly defined in the order information table and applies to all electrical and timing specifications unless otherwise noted. It is distinct from the wider-range variants (e.g., LTC1864IMS8#PBF for –40°C to +85°C).
Does the LTC1864ACMS8#PBF support single-ended input configurations?
No - the LTC1864ACMS8#PBF features a true differential analog input (IN+, IN–) and does not support single-ended mode. Unlike the pin-compatible LTC1865, it lacks a multiplexer and software-selectable channel configuration. Its transfer function is strictly based on the voltage difference between IN+ and IN–, with zero code at IN+ = IN–.
What is the maximum clock frequency supported by the LTC1864ACMS8#PBF's SCK input?
The LTC1864ACMS8#PBF supports a maximum SCK frequency of 20MHz under H-grade conditions. For the AC-grade part (LTC1864ACMS8#PBF), the recommended maximum is 16.7MHz, as confirmed in the Recommended Operating Conditions table. Exceeding this may compromise timing margins and data validity.
Can the LTC1864ACMS8#PBF operate with a 3.3V supply?
No - the LTC1864ACMS8#PBF requires a 4.75V to 5.25V supply (VCC). Its absolute maximum rating is 7V, but functional operation is only guaranteed within the 5V ±5% range. Using 3.3V will prevent proper internal biasing and result in undefined or nonfunctional behavior.
How does the auto-shutdown feature of the LTC1864ACMS8#PBF reduce power consumption?
The LTC1864ACMS8#PBF automatically powers down between conversions when the CONV pin remains high. At 1ksps, this reduces supply current from 850μA (at 250ksps) to just 2μA. The reduction scales with sampling frequency, enabling dynamic power optimization without external control circuitry - a key enabler for battery longevity in intermittent-sampling applications.
LTC1864ACMS8#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:
- -
LTC1864ACMS8#PBF FAQ
1.How can I place an order for LTC1864ACMS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1864ACMS8#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 LTC1864ACMS8#PBF reliable?
The price and inventory of LTC1864ACMS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1864ACMS8#PBF is usually 5 days.
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4.How is shipping managed for LTC1864ACMS8#PBF?
LTC1864ACMS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1864ACMS8#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 LTC1864ACMS8#PBF?
For technical support, including LTC1864ACMS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1864ACMS8#PBF requirements.
6.How does Aetrix verify that LTC1864ACMS8#PBF is sourced from the original manufacturer or authorized distributors?
All LTC1864ACMS8#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 LTC1864ACMS8#PBF meets industry standards.
7.What is the process for return or replacement of LTC1864ACMS8#PBF?
All LTC1864ACMS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1864ACMS8#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 LTC1864ACMS8#PBF part is unused and in its original packaging.
Return procedure for LTC1864ACMS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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