ad7523kn Intersil Corporation, ad7523kn Datasheet - Page 7

• Manufacturer Part Number: ad7523kn
• Description: 8-bit, Multiplying D/a Converters
• Manufacturer: Intersil Corporation

Offset Adjustment
V
Where:
D
1. Adjust V
2. Connect all digital inputs to “Logic 1”.
3. Adjust I
5. Adjust I
4. Connect MSB (Bit 1) to “Logic 1” and all other bits to “Logic 0”.
0 D
OUT
=
I
V
OUT2
FIGURE 6. DIVIDER (DIGITALLY CONTROLLED GAIN)
Bit 1
-------------
OUT
= -V
2
1
255
--------- -
256
IN/D
.
+
amplifier output.
OUT1
OUT2
Bit 2
-------------
REF
DIGITAL FREQUENCY
2
V
2
IN
OUT2
OUT1
CONTROL WORD
to approximately +10V.
amplifier offset adjust trimpot for 0V 1mV at
amplifier offset adjust trimpot for 0V 1mV at
+
6
-
+
Bit 8
-------------
2
1
16
2
3
2
AD7523/
AD7533
R
FB
+15V
14
15
11
V
4
REF
BIT 8 (10) (AD7533)
V
FIGURE 5. PROGRAMMABLE FUNCTION GENERATOR
MSB
LSB
OUT
MSB
LSB
BIT 1
CALIBRATE
DIGITAL
INPUT
“D”
10K
15
4
13
AD7523/
AD7533
+15V
V
14
AD7523, AD7533
DD
3
NC
16
6.8V
1
2
(2)
OUT1
OUT2
10-14
Gain Adjustment
DIGITAL
V O UT
Where D
1. Connect all digital inputs to V+.
2. Monitor V
3. To increase V
4. To decrease V
0 D
INPUT
(10) (AD7533)
between V
between the reference voltage and the V
“D”
BIT 8
BIT 1
FIGURE 7. MODIFIED SCALE FACTOR AND OFFSET
=
1K
255
--------- -
256
6
-
+
MSB
LSB
=
A1
V REF
C1
Bit 1
----------- -
10K 1%
2
V
1
OUT
OUT
REF
15
4
13
AD7523/
AD7533
+
--------------------- -
R 1
OUT
+15V
OUT
A2
Bit 2
----------- -
14
2
for a -V
3
and R
R 2
+
-
2
6
+
, connect a series resistor of up to 250
R 2
16
, connect a series resistor of up to 250
+
1
2
4.7K
FEEDBACK
–
REF
Bit 8
----------- -
10K 1%
2
--------------------- -
R 1
8
R 1 D
6
+
-
(1 - 2
+
R 2
-9
TRIANGULAR
.
SQUARE
) volts reading.
WAVE
R1
WAVE
REF
R2
6
terminal.
+
-
V
OUT