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AD7858LARSZ-REEL
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Product Detailed Parameters
- Description：IC ADC 12BIT SAR 24SSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR),Bulk
- Number of Bits：12
- Sampling Rate (Per Second)：100k
- Number of Inputs：4, 8
- Input Type：Pseudo-Differential, Single Ended
- Data Interface：SPI
- Configuration：MUX-S/H-ADC
- Ratio - S/H:ADC：1:01
- Number of A/D Converters：1
- Architecture：SAR
- Reference Type：External, Internal
- Voltage - Supply, Analog：3V ~ 5.5V
- Voltage - Supply, Digital：3V ~ 5.5V
- Features：-
- Operating Temperature：-40°C ~ 85°C
- Package / Case：24-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：24-SSOP
- Mounting Type：Surface Mount
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Overview
The AD7858LARSZ-REEL is an 8-channel, 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. It operates from a single 3 V to 5.5 V supply and features a throughput rate of 100 kSPS. The device includes an internal 2.5 V reference, system calibration capabilities, and flexible serial interface compatibility with SPI/QSPI/8051 protocols. Packaged in a 24-lead SSOP, it offers low power consumption of typically 6.85 mW at 3 V.
Feature Summary
- Low-power operation optimized for battery-powered applications
- Integrated self-calibration and system calibration functions
- Flexible serial interface compatible with multiple microprocessor standards
- Automatic power-down mode to minimize energy usage
Applications
- Battery-powered personal digital assistants
- Medical instrumentation systems
- Mobile communications devices
- Pen computers and portable data acquisition
Procurement Notes
Verify the specific suffix 'REEL' indicates tape-and-reel packaging when sourcing components. Confirm that the L variant meets the required 100 kSPS throughput specifications for your application design. Ensure voltage supply ranges align with the 3 V to 5.5 V operational limits defined in the datasheet.
Selection Notes
Select this component over the standard AD7858 if lower power dissipation is critical, as the L version consumes approximately one-third the power of the standard model. Verify that the 24-lead SSOP package fits the PCB layout constraints. Ensure the system clock frequency does not exceed 1.8 MHz for optimal performance within the specified temperature range.
Part Context
This part belongs to the AD7858 family of high-speed, low-power sampling ADCs. The AD7858L variant specifically targets low-power applications while maintaining 12-bit resolution. It shares functional similarities with other SAR ADCs but distinguishes itself through integrated calibration and flexible power management options suitable for portable electronics.
Replacement Considerations
Direct pin-compatible replacements include the AD7858LARZ for higher speed requirements. Other series members like the AD7858LARSZ offer identical electrical characteristics but differ in package type. Verify interface timing parameters when substituting with non-L variants due to potential differences in maximum clock frequencies.
