PNA7509
PNA7509 is 7-Bit A/D Conveter manufactured by Philips Semiconductors.
DESCRIPTION
The PNA7509 is a monolithic NMOS 7-bit analogue-to-digital converter (AOC) designed for video applications. The device converts the analogue input signal into 7 -bit binary coded digital words at a sampling rate of 22 MHz.
The circuit prises 129 parators, a reference resistor chain, bining logic, transcoder stages, and TTL output buffers which are positive edge triggered and can be switched into 3-state mode. The digital output is selectable in two's plement or binary coding.
The use of separate outputs for overflow and underflow detection facilitates full-scale driving.
Features
- 7-bit resol ution
- No external sample and hold required
- High input impedance
- Binary or two's plement 3-state TTL outputs
- Overflow and underflow 3-state TTL outputs
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