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AD7854ARS-REEL
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Product Detailed Parameters
- Description：IC ADC 12BIT SAR 28SSOP
- Series：-
- Mfr：Analog Devices Inc.
- Package：Tape & Reel (TR)
- Number of Bits：12
- Sampling Rate (Per Second)：200k
- Number of Inputs：1
- Input Type：Pseudo-Differential
- Data Interface：SPI
- Configuration：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：28-SSOP (0.209", 5.30mm Width)
- Supplier Device Package：28-SSOP
- Mounting Type：Surface Mount
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Overview
The AD7854ARS-REEL is a 12-bit, single-channel Analog-to-Digital Converter (ADC) from the AD7854 family, manufactured by Analog Devices Inc. It operates on a single 3 V to 5.5 V supply and supports throughput rates up to 200 kSPS with a master clock frequency of 4 MHz. The device features a pseudo-differential analog input range of 0 V to VREF (unipolar) or ±VREF/2 (bipolar). It includes an internal 2.5 V reference, self-calibration capabilities, and flexible power-down modes reducing consumption to 1.3 mW at 10 kSPS. Data is accessed via a parallel interface in a 28-lead SSOP package.
Feature Summary
- Integrated system and self-calibration mechanisms ensure accurate operation over time and temperature variations.
- Flexible parallel I/O port allows for versatile interfacing with microprocessors and digital systems.
- Automatic power-down functionality optimizes energy efficiency for battery-powered applications.
Applications
- Battery-powered personal digital assistants and mobile communications devices
- Medical instrumentation requiring low power consumption
- Pen computers and high-speed modem systems
Procurement Notes
Verify the specific suffix 'RS' corresponds to the 28-lead SSOP package variant when sourcing. Confirm that the '-REEL' designation indicates tape-and-reel packaging suitable for automated assembly processes. Ensure compatibility with the required operating temperature range of -40°C to +85°C for the standard commercial grade.
Selection Notes
Select the AD7854ARS-REEL for designs requiring 12-bit resolution with speeds up to 200 kSPS. Choose this part over the AD7854L variant if higher throughput is prioritized over ultra-low static power. Ensure the application can accommodate the 28-lead SSOP footprint and provides the necessary parallel data bus connections for control and data transfer.
Part Context
This component belongs to the AD7854 series of high-speed, low-power sampling ADCs. The AD7854 model is optimized for speed, while the AD7854L variant focuses on lower power dissipation. Both share similar architectural features but differ in maximum clock frequencies and power consumption profiles.
Replacement Considerations
The AD7854AR is the non-reel equivalent of this part number. For lower power requirements, the AD7854LAR-REEL serves as a functional alternative with reduced throughput capabilities.
