10-9

Standard Measurement Conditions and

Description

R = 200

Ω.

16R = 3.3k

Ω.

Input data in Figure 10 = all “0” and “1” of rectangular wave,

clock frequency = 50MHz for a total value of three channels.

Notes On Operation

Selecting the Output Resistance:

HI2309 is a current output type D/A converter. To create the

output voltage, connect the resistor to the current output pin.

Specifications:

a resistance sixteen times the output resistance to the refer-

exist, a similar value can be used instead.

R is the resistor to be connected to the IO and R’ is the

can be reduced by increasing the resistance, but this will on

the contrary, increase the glitch energy and data setting

time. Set the best values according to the purpose of use.

Correlation Between Data and Clock:

For HI2309 to display the desired performance as a D/A con-

verter, the data transmitted from outside and the clock must

Separate the analog and digital signals around the device to

a 0.1

µF ceramic capacitor as near as possible to the pin for

both digital and analog signals.

Latch Up:

power supply of the board. This is to prevent latch up caused

by potential difference between the two pins when the power

is turned on.

Characteristics. Pay attention for capacitance component

not to attach to this pin because its output may become

unstable.

VG Pin:

It is recommended to use a 1

µF capacitor to improve the AC

Characteristics, though the typical capacitance value

FIGURE 9. OUTPUT FULL SCALE VOLTAGE vs AMBIENT

TEMPERATURE

FIGURE 10. OUTPUT FREQUENCY vs CURRENT

CONSUMPTION

1.95

1.90

0

-25

0

25

50

75

50

40

10

1

5

10

15

20

OUTPUT FREQUENCY (MHz)