AD7233 Analog Devices, AD7233 Datasheet - Page 6

• Manufacturer Part Number: AD7233
• Description: LC2MOS 12-Bit Serial Mini-DIP DACPORT
• Manufacturer: Analog Devices

AD7233–Typical Performance Graphs
APPLYING THE AD7233
Bipolar ( 5 V) Configuration
The AD7233 provides an output voltage range from –5 V to
+5 V without any external components. This configuration is
shown in Figure 4. The data format is two's complement. The
output code table is shown in Table I. If offset binary coding is
required, then this can be done by inverting the MSB in soft-
ware before the data is loaded to the AD7233.
Power Supply Decoupling
To achieve optimum performance when using the AD7233, the
V
0.1 µF capacitors. In very noisy environments it is recom-
mended that 10 µF capacitors be connected in parallel with the
0.1 µF capacitors.
DD
0.50
0.40
0.30
0.20
0.10
and V
0
10.5
AD7233
11
SS
lines should each be decoupled to GND using
12
–12V TO
V
DD
13
/V
+5V
T = +25 C
SS
–15V
A
– Volts
V
14
SS
+12V TO
12-BIT
DAC
2R
15
+15V
16
V
DD
GND
2R
100
90
80
70
60
50
40
30
20
10
0
*
10
POWER SUPPLY DECOUPLING CAPACITORS
ARE 10µF AND 0.1µF.
V
OUTPUT WITH ALL
100mV p–p SIGNAL
OUTPUT WITH ALL
V
OUT
DD
1s ON DAC
0s ON DAC
= +15V WITH
100
FREQUENCY – Hz
NO DECOUPLING
NO DECOUPLING
1k
Input Data Word
XXXX 0111 1111 1111
XXXX 0000 0000 0001
XXXX 0000 0000 0000
XXXX 1111 1111 1111
XXXX 1000 0000 0001
XXXX 1000 0000 0000
X = Don’t Care
Note: 1 LSB = 5 V/2048 ≈ 2.4 mV
DECOUPLING
DECOUPLING
10k
MSB
Table I. AD7233 Bipolar Code Table
100k
LSB
500
100
200
50
20
0
50
100 200 500 1k 2k
Analog Output, V
+5 V • (2047/2048)
+5 V • (1/2048)
0 V
–5 V • (1/2048)
–5 V • (2047/2048)
–5 V • (2048/2048) = –5 V
FREQUENCY – Hz
V
V
T = +25 C
A
DD
SS
= +15V
= – 15V
5k
OUTPUT WITH ALL
10k 20k
0s ON DAC
50k
OUT
100k