 English |
|
|
|
|
|
|
|
| SN74TVC16222A_07 Datasheet, PDF (7/18 Pages) Texas Instruments – 22-BIT VOLTAGE CLAMP | |||
| |||
| ◁ |
SN74TVC16222A
22ÄBIT VOLTAGE CLAMP
SCDS087G â APRIL 1999 â REVISED APRIL 2005
APPLICATION INFORMATION
electrical characteristics
The electrical characteristics of the NMOS transistors used in the TVC devices are illustrated by TI SPICE
simulations. Figure 4 shows the test configuration for the TI SPICE simulations. The results, shown in
Figures 5 and 6, show the current through a pass transistor versus the voltage at the source for different
reference voltages. The plots of the dc characteristics clearly reveal that the device clamps at the desired
reference voltage for the varying device environments.
Figure 5 shows the V-I characteristics with low reference voltages and a reference-transistor drain-supply
voltage of 3.3 V. To further investigate the spread of the V-I characteristic curves, VREF was held at 2.5 V and
IREF was increased by raising VDDREF (see Figure 6). The result was a tighter grouping of the V-I curves.
VDDREF
VDDPASS
RDREF
RDPASS
GATE VBIAS
VDPASS
VREF
VSPASS
Figure 4. TI SPICE-Simulation Schematic and Voltage-Node Names
⢠POST OFFICE BOX 655303 DALLAS, TEXAS 75265
7
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese