24027

` Two digitally controlled 256-position potentiometers
` Serial port provides means for setting and reading both potentiometers
` Resistors can be connected in series to provide additional resolution
` Default wiper position on power up is 50%
` Resistive elements are temperaturecompensated to +20% end to end
` Two high-gain, wide bandwidth operational amplifiers
` Low power CMOS design
` Applications include analog-to-digital and digital-to-analog converters, variable oscillators, and variable gain mplifiers
` 20-pin DIP package or optional 20-pin SOIC surface mount package
` Operating temperature range
   - Commercial: 0 to 70
` Resistance values: RESOLUTION -3 dB POINT DS1667-10: 10k 39 ohms 1.1 MHz DS1667-50: 50k 195 ohms 200 kHz DS1667-100: 100k 390 ohms 100 kHz

Voltage on Any Pin Relative to Ground (V_B = GND) ........-0.5V to +7.0V
Voltage on Resistor Pins when V_B = -5.5V..................... -5.5V to +7.0V
Voltage on V_B ...................................................................-5.5V to GND
Operating Temperature .......................................................0 to 70
Storage Temperature ...................................................-55 to +125
Soldering Temperature ........................................260 for 10 seconds

* This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.

The DS1667 is a dual-solid state potentiometer that is adjustable by digitally selected resistive elements.

DS1667 is composed of 256 resistive elements. Between each resistive section of each potentiometer are tap points accessible to the wiper. The position of the wiper on the resistive array is set by an 8-bit register that controls which tap point is connected to the wiper output. Each 8-bit register can be read or written by sending or receiving data bits over a 3-wire serial port. In addition, the resistors can be stacked such that a single potentiometer of 512 sections results. When two separate potentiometers are used, the resolution of the DS1667 is equal to the resistance value divided by 256. When the potentiometers are stacked end to end, the resistance value is doubled while the resolution remains the same. The DS1667 also contains two high gain wide bandwidth operational amplifiers. Each amplifier has both the inverting and non-inverting inputs and the output available for user nfiguration. The operational amplifiers can be paired with the resistive elements to perform such functions as analog to digital conversion, digital to analog conversion, variable gain amplifiers, and variable oscillators.