Datasheet

AD7303–Typical Performance Characteristics
–6–
REV. 0
V
DD
= +5V AND +3V
INTERNAL REFERENCE
T
A
= 258C
DAC LOADED WITH 00HEX
SINK CURRENT – mA
V
OUT
– mV
800
0
08246
720
400
249
160
80
640
560
320
480
Figure 3. Output Sink Current Capa-
bility with V
DD
= 3 V and V
DD
= 5 V
REFERENCE VOLTAGE – Volts
ERROR – LSBs
0.5
0
1 1.2 2.8
1.4 1.6 1.8 2.2 2.4 2.62
0.45
0.25
0.15
0.1
0.05
0.4
0.35
0.2
0.3
V
DD
= +5V
T
A
= 258C
INL ERROR
DNL ERROR
Figure 6. Relative Accuracy vs.
External Reference
FREQUENCY – kHz
ATTENUATION – dB
1 10 10000100 1000
10
5
–40
0
–5
–10
–15
–20
–25
–30
–35
V
DD
= +5V
T
A
= 25°C
EXTERNAL SINE WAVE REFERENCE
DAC REGISTER LOADED WITH FFHEX
Figure 9. Large Scale Signal
Frequency Response
SOURCE CURRENT – mA
V
OUT
– Volts
02 846
5
4.92
4.2
4.84
4.76
4.68
4.6
4.52
4.44
4.36
4.28
V
DD
= +5V
T
A
= 25°C
INTERNAL REFERENCE
DAC REGISTER LOADED WITH FFHEX
Figure 4. Output Source Current
Capability with V
DD
= 5 V
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – 8C
5
3.5
2
I
DD
– mA
4.5
4
3
2.5
LOGIC INPUTS = V
DD
OR GND
INTERNAL REFERENCE
V
DD
= +5V
LOGIC INPUTS = V
IH
OR V
IL
Figure 7. Supply Current vs.
Temperature
T
SYNC
V
OUT
V
DD
= +3V
INTERNAL VOLTAGE REFERENCE
FULL SCALE CODE CHANGE 00H-FFH
T
A
= 25°C
1
3
2
V
OUT
CH1 5V, CH2 1V, CH3 20mV
TIME BASE = 200ns/div
Figure 10. Full-Scale Settling Time
SOURCE CURRENT – mA
3.5
1
01 8234567
3.25
2.5
2.25
1.75
1.25
3
2.75
2
1.5
V
OUT
– Volts
V
DD
= +3V
T
A
= 25°C
INTERNAL REFERENCE
DAC REGISTER LOADED WITH FFHEX
Figure 5. Output Source Current
Capability with V
DD
= 3 V
V
DD
– Volts
I
DD
– mA
5.5
1.5
5
3.5
3
2.5
2
4.5
4
2.5 3 5.5
3.5 4 4.5 5
LOGIC INPUTS = V
DD
OR GND
LOGIC INPUTS = V
IH
OR V
IL
T
A
= 25°C
INTERNAL REFERENCE
Figure 8. Supply Current vs.
Supply Voltage
SYNC
V
OUT
POWER UP TIME
V
DD
= +5V
INTERNAL REFERENCE
BOTH DACS IN POWER DOWN INITIALLY
1
2
CH1 = 2V/div, CH2 = 5V/div,
TIME BASE = 2µs/div
Figure 11. Exiting Power-Down (Full
Power-Down)