The MAX5430/MAX5431 integrate the precision resistors and analog switches needed to implement PGAs. To allow the user to choose the ideal op amp for his/her application, an operational amplifier has not been included. The MAX5431 provides cancellation of offset voltages caused by op amp input bias currents. This is achieved independent of gain setting by matching the impedances of both amplifier inputs.
The MAX5430/MAX5431 use less than 35mA supply current when idle, operate from single +12V to +15V or dual ±12V to ±15V supplies, and use a simple 2-wire parallel interface to set divider ratios.
Prices for the MAX5430/MAX5431 start at $1.26 and $1.43, respectively. All prices are for C grade (1000-up, FOB USA).
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