Analog Devices AD7821 8-bit Parallel ADC 3-channel 20-Pin CDIP

Manufactured by Analog Devices - Part # AD7821TQ - CerDIP20 through hole package

RS Components Part # 759-2455 (Discontinued)

LC²MOS High Speed μ
P Compatible 8-Bit ADC with Track/Hold Function

FEATURES

• Fast Conversion Time: 660ns Max
• 100kHz Track-and-Hold Function
• 1MHz Sample Rate
• Unipolar and Bipolar Input Ranges
• Ratiometric Reference Inputs
• No External Clock
• Extended Temperature Range Operation

DESCRIPTION

The AD7821 is a high speed, 8-bit, sampling, analog-to-digital converter that offers improved performance over the popular AD7820. It offers a conversion time of 660ns (versus 1.36µs for the AD7820) and 100kHz signal bandwidth (versus 6.4kHz). The sampling instant is better defined and occurs on the falling edge of WR or RD. The provision of a VSS pin (Pin 19) allows the part to operate from ±5 V supplies and to digitize bipolar input signals. Alternatively, for unipolar inputs, the V_SS pin can be grounded and the AD7821 will operate from a single +5 V supply, like the AD7820.