Datasheet MAX961-MAX964, MAX997, MAX999 (Maxim) - 9

MAX961–MAX964/ Single/Dual/Quad, Ultra-High-Speed, +3V/+5V, MAX997/MAX999 Beyond-the-Rails Comparators tSU tH DIFFERENTIAL VOS INPUT VOLTAGE tLPW VCC LE VCC 2 0V tPD tLPD VOH V Q CC 2 VOL Q VCC 2 tSKEW tSKEW Figure 2. MAX961/MAX963 Timing Diagram For a large differential input voltage (exceeding 3VF), this protection circuitry increases the input bias current at IN+ (source) and IN- (sink).
MAX961–MAX964 MAX997
(IN+ − IN−) − 3 F V Input current =
MAX999
2 × 200 Input currents with large differential input voltages should 200Ω TO INTERNAL not be confused with input bias currents (IB). As long as IN+ CIRCUITRY the differential input voltage is less than 3VF, this input current is less than 2IB. The input circuitry allows the MAX961–MAX964/MAX997/ MAX999’s input common-mode range to extend 100mV beyond both power-supply rails. The output remains in IN- TO INTERNAL CIRCUITRY the correct logic state if one or both inputs are within the 200Ω common-mode range. Taking either input outside the common-mode range causes the input to saturate and the propagation delay to increase. Figure 3. Input Stage Circuitry www.maximintegrated.com Maxim Integrated │ 9