®
®
DAC-HF Series
CALIBRATION PROCEDURE
Unipolar Output Current
1. Connect the converter as shown in Figure 2.
2. Set all inputs low and adjust the ZERO ADJUST
potentiometer for a reading of 0V at the output.
3. Set all inputs high and adjust the GAIN ADJUST
potentiometer for a reading of –F.S. + 1LSB (See Table 1).
Bipolar Output Current
1. Connect the converter as shown in Figure 3.
2. Set all inputs low and adjust the OFFSET ADJUST and
LOAD potentiometer for an output reading of +F.S. (See
Table 2).
3. Set all inputs high and adjust the GAIN ADJUST potentiom-
eter for an output reading of –F.S. + 1LSB (See Table 2).
+15V
+
0.1µF
1µF
Table 1. 12-Bit Unipolar Output Coding
ANALOG OUTPUT
UNIPOLAR
INPUT CODING
SCALE
STRAIGHT BINARY 0 to 1V F.S. 0 to –5V F.S. 0 to –10V F.S.
–F.S. + 1LSB
–3/4F.S.
–1/2F.S.
–1/4F.S.
–1LSB
0
1111 1111 1111
1100 0000 0000
1000 0000 0000
0100 0000 0000
0000 0000 0001
0000 0000 0000
+0.9998V
+0.7500V
+0.5000V
+2.5000V
+0.0002V
0.0000V
–4.9988V
–3.7500V
–2.5000V
–1.2500V
–0.0012V
0.0000V
–9.9976V
–7.5000V
–5.0000V
–2.5000V
–0.0024V
0.0000V
Table 2. 12-Bit Bipolar Output Coding
BIPOLAR
SCALE
–F.S. + 1LSB
–1/2F.S.
–1LSB
0
+1/2F.S.
+F.S. – 1LSB
+F.S.
ANALOG OUTPUT
INPUT CODING
OFFSET
±0.5V F.S. ±2.5V F.S. ±5V F.S.
BINARY
1111 1111 1111
1100 0000 0000
1000 0000 0001
1000 0000 0000
0100 0000 0000
0000 0000 0001
0000 0000 0000
+0.4998V
+0.1250V
+0.0002V
0.0000V
–0.1250V
–0.4998V
–0.5000V
–2.4988V
–1.2500V
–0.0012V
0.0000V
+1.2500V
+2.4988V
+2.5000V
±10V F.S.
–9.9951V
–5.0000V
–0.0049V
0.0000V
+5.0000V
+9.9951V
+10.0000V
–4.9976V
–2.5000V
–0.0024V
0.0000V
+2.5000V
+4.9976V
+5.0000V
24
BIT 1
1
19
17
18
100W
200W
20
OFFSET
ADJUST
370W
100W
16
15
14
12
BIT 12
23
22
13
LOAD
(444W NOMINAL)
(FOR 0 TO ±0.5V FS)
I
OUT
OUTPUT
Table 3. Programmable Output Range Pin Connections
FEEDBACK
OUTPUT VOLTAGE
CONNECTIONS
RANGE
0 to –5V
0 to –10V
±2.5V
±5V
±10V
PIN 19
PIN 19
PIN 19
PIN 19
PIN 17
CONNECT THESE
PINS TOGETHER
PIN 17 to PIN 18 / PIN 20 to PIN 23
PIN 20 to PIN 23
PIN 17 to PIN 18 / PIN 20 to PIN 18
PIN 20 to PIN 18
PIN 20 to PIN 18
DAC-HF
21
GAIN
ADJUST
In all programmable output ranges, pin 18 connects to
external operational amplifier inverting input.
4k = 0.1%
20
BIPOLAR
OFFSET
REF OUT
(–10V = 2%)
2kΩ FEEDBACK
(10V RANGE)
4kΩ FEEDBACK
(20V RANGE)
–15V
0.1µF
+
21
1µF
19
Figure 3. Bipolar Current Output Connections
+15V
+
0.1µF
1µF
+15V
24
BIT 1
1
19
17
18
I
OUT
400W LOAD
(FOR 0 TO
+1V FS)
2MW
ZERO
ADJUST
25kW
–15V
OUTPUT
2k
2k
17
18 OUTPUT
400Ω, ±10%
5mA
23 GROUND
Figure 4. Equivalent Output Circuit
20
DAC-HF
21
100W
16
15
14
12
BIT 12
23
22
13
2V/DIV
–15V
0.1µF
+
50nsec/DIV
2V/DIV
GAIN
ADJUST
50nsec/DIV
1µF
DAC-HF with AM-500, ±5V output full scale (10V) step
Figure 2. Unipolar Current Output Connections
Figure 5. Voltage Output Waveforms
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
