ELECTRICAL CHARACTERISTICS (cont.)
Logic (over specified operating
High level input voltage
Low level input voltage
High level input current
Low level input current
Input clamp diode voltage
Enable pulse width
Data set-up time
Data hold time
Note 4: Set up time before ENABLE goes high
Note 5: Hold time after ENABLE goes high
µA VIN = 5.5V, VCC = Max.
µA VIN = 2.4V, VCC = Max.
µA VIN = 0.4V, VCC = Max.
V IIN = -8mA
ns Note 4
ns Note 5
The converter is of the voltage switching type and uses
an R-2R ladder network as shown in Fig.3. Each 2R element
is connected to 0V or VREF IN by transistor voltage switches
specially designed for low offset voltage (<1mV). A binary
weighted voltage is produced at the output of the R-2R
Fig.3 The R-2R ladder network
where n is the digital input to the D-A from the data latch.
VOS is a small offset voltage produced by the D-A switch
currents ﬂowing through the package lead resistance. The
value of VOS is typically 1mV. This offset will normally be
removed by the setting up procedure (see Operating Notes)
and because the offset temperature coefﬁcient is low
(±6µV/°C)the effect on accuracy is negligible.