The AD7457 is a 12-bit, low power, successive-approximation (SAR) analog-to-digital converter that features a pseudo differential analog input. This part operates from a single 2.7 V to 5.25 V power supply and features throughput rates up to 100 kSPS.
The part contains a low-noise, wide bandwidth, differential track and hold amplifier (T/H) which can handle input frequencies in excess of 1 MHz. The reference voltage for the AD7457 is applied externally to the VREF pin and can range from 100mV to VDD, depending on what suits the application.
The conversion process and data acquisition are controlled using and the serial clock allowing the device to interface with Microprocessors or DSPs.
The SAR architecture of these parts ensures that there are no pipeline delays.
The AD7457 uses advanced design techniques to achieve very low power dissipation.
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|AD7457: Low Power, Pseudo Differential, 100 kSPS 12-Bit ADC in 8-Lead SOT-23 Data Sheet (Rev A, 02/2005) (pdf, 532 kB)||Data Sheets|
|MS-2210: Designing Power Supplies for High Speed ADC (pdf, 327 kB)||Technical Articles|
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog
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8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
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Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.
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