AD7303 Просмотр технического описания (PDF) - Analog Devices
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AD7303 Datasheet PDF : 16 Pages
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AD7303–Typical Performance Characteristics
800
720 VDD = +5V AND +3V
INTERNAL REFERENCE
640 TA = 25؇C
560 DAC LOADED WITH 00HEX
480
400
320
249
160
80
0
0
2
4
6
8
SINK CURRENT – mA
5
4.92
4.84
4.76
4.68
4.6
4.52
4.44
VDD = +5V
4.36 INTERNAL REFERENCE
4.28
DAC REGISTER LOADED WITH FFHEX
TA = 25°C
4.2
0
2
4
6
8
SOURCE CURRENT – mA
Figure 3. Output Sink Current Capa-
bility with VDD = 3 V and VDD = 5 V
Figure 4. Output Source Current
Capability with VDD = 5 V
0.5
0.45
0.4
VDD = +5V
TA = 25؇C
0.35
0.3
INL ERROR
0.25
0.2
0.15
DNL ERROR
0.1
0.05
0
1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8
REFERENCE VOLTAGE – Volts
Figure 6. Relative Accuracy vs.
External Reference
5
4.5
LOGIC INPUTS = VIH OR VIL
4
INTERNAL REFERENCE
3.5 VDD = +5V
3
2.5
LOGIC INPUTS = VDD OR GND
2
–60 –40 –20 0 20 40 60 80 100 120 140
TEMPERATURE – ؇C
Figure 7. Supply Current vs.
Temperature
3.5
3.25
3
2.75
2.5
2.25
2 VDD = +3V
INTERNAL REFERENCE
1.75 DAC REGISTER LOADED WITH FFHEX
TA = 25°C
1.5
1.25
1
0 1 2 34 5 6 7 8
SOURCE CURRENT – mA
Figure 5. Output Source Current
Capability with VDD = 3 V
5.5
5
INTERNAL REFERENCE
4.5
TA = 25°C
4
LOGIC INPUTS = VIH OR VIL
3.5
3
2.5
2
1.5
2.5
LOGIC INPUTS = VDD OR GND
3 3.5
4 4.5
VDD – Volts
5 5.5
Figure 8. Supply Current vs.
Supply Voltage
10
5
0
–5
–10
–15
VDD = +5V
–20 EXTERNAL SINE WAVE REFERENCE
DAC REGISTER LOADED WITH FFHEX
–25 TA = 25°C
–30
–35
–40
1
10
100
1000
FREQUENCY – kHz
10000
Figure 9. Large Scale Signal
Frequency Response
T
SYNC VDD = +3V
1
INTERNAL VOLTAGE REFERENCE
FULL SCALE CODE CHANGE 00H-FFH
TA = 25°C
2
VOUT
VOUT
3
CH1 5V, CH2 1V, CH3 20mV
TIME BASE = 200ns/div
Figure 10. Full-Scale Settling Time
POWER UP TIME
VDD = +5V
INTERNAL REFERENCE
BOTH DACS IN POWER DOWN INITIALLY
SYNC
2
VOUT
1
CH1 = 2V/div, CH2 = 5V/div,
TIME BASE = 2µs/div
Figure 11. Exiting Power-Down (Full
Power-Down)
–6–
REV. 0
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