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Product Detailed Parameters
- Description：IC ADC 18BIT SAR 32QFN
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tube
- Number of Bits：18
- Sampling Rate (Per Second)：15M
- Number of Inputs：1
- Input Type：Differential
- Data Interface：LVDS - Serial
- Configuration：S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：Internal
- Voltage - Supply, Analog：5V
- Voltage - Supply, Digital：2.375V ~ 2.625V
- Features：-
- Operating Temperature：0°C ~ 70°C
- Package / Case：32-WFQFN Exposed Pad
- Supplier Device Package：32-QFN (5x5)
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
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Overview
The LTC2387CUH-18#PBF is an 18-bit, 15Msps successive approximation register (SAR) analog-to-digital converter manufactured by Analog Devices Inc. It operates from 5V and 2.5V supplies with a differential input range of ±4.096V. Key electrical specifications include a typical SNR of 95.7dB at 1MHz input frequency, a maximum INL of ±3LSB, and guaranteed 18-bit no missing codes. The device features a serial LVDS interface, internal reference, and dissipates 125mW at full speed. It is housed in a 32-lead 5mm × 5mm QFN package.
Feature Summary
- 18-bit resolution with 15Msps throughput rate
- Serial LVDS digital interface with one-lane or two-lane output modes
- Internal 2.048V reference with ±20ppm/°C temperature coefficient
- No pipeline delay or cycle latency for control loop applications
Applications
- High-speed data acquisition
- Imaging systems
- Communications requiring wide dynamic range
- Control loops
- Instrumentation
- Automated test equipment (ATE)
Procurement Notes
Verify the ordering suffix #PBF indicates tube packaging rather than tape and reel. Confirm the 'C' grade corresponds to the 0°C to 70°C operating temperature range. Ensure compatibility with the 32-lead QFN footprint during procurement planning.
Selection Notes
Select this component when 18-bit linearity and 15Msps speed are required without pipeline latency. The internal reference simplifies design but requires bypassing; external references may be needed for higher precision. Ensure the driving circuit can settle within the acquisition time to maintain specified INL performance.
Part Context
This part belongs to the LTC2387 family, which includes 16-bit variants (LTC2387-16) and different sampling rates. The CUH-18 designation specifies the commercial temperature grade and 18-bit resolution. It shares the same pinout and functional architecture as other members of the series.
Replacement Considerations
Direct replacements within the same package and specification include LTC2387IUH-18#PBF for industrial temperature range (-40°C to 85°C). Lower resolution options like LTC2387CUH-16#PBF are available if 16-bit accuracy suffices.
