AD7302 Analog Devices, AD7302 Datasheet - Page 7

• Manufacturer Part Number: AD7302
• Description: 2.7 V to 5.5 V, Parallel Input Dual Voltage Output 8-Bit DAC
• Manufacturer: Analog Devices

Specifications of AD7302

• Resolution (bits): 8bit
• Dac Update Rate: 833kSPS
• Dac Settling Time: 1.2µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: Par

REV. 0
Figure 2. Output Sink Current Capa-
bility with V
Figure 5. Relative Accuracy vs.
External Reference
Figure 8. Large Scale Signal
Frequency Response
–10
–15
–20
–25
–30
–35
–40
0.45
0.35
0.25
0.15
0.05
10
–5
800
720
640
560
480
400
320
240
160
0.5
0.4
0.3
0.2
0.1
5
0
80
0
0
1
1.0 1.2
0
V
EXTERNAL SINEWAVE REFERENCE
DAC REGISTER LOADED WITH FFHEX
T
DD
A
V
T
V
INTERNAL REFERENCE
T
DAC LOADED WITH 00HEX
DD
A
= +25 C
A
DD
= +25 C
= 5V
DNL ERROR
= +25 C
REFERENCE VOLTAGE – Volts
= 5V
= 5V AND 3V
DD
1.4 1.6 1.8
INL ERROR
10
2
FREQUENCY – Hz
SINK CURRENT – mA
= 3 V and V
100
4
2.0
2.2 2.4 2.6
DD
1k
6
= 5 V
10k
2.8
8
Figure 6. Typical Supply Current
vs. Temperature
Figure 9. Full-Scale Settling Time
Figure 3. Output Source Current
Capability with V
1
2
3
4.92
4.84
4.76
4.68
4.52
4.44
4.36
4.28
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
4.6
4.2
0
–50
5
WR
0
INTERNAL REFERENCE
LOGIC INPUTS = V
BOTH DACS ACTIVE
V
INTERNAL REFERENCE
DAC REGISTER LOADED
T
Typical Performance Characteristics–AD7302
V
WITH FFHEX
DD
A
–25
OUT
CH1 5V, CH2 1V, CH3 20mV
= +25 C
= 5V
TIME BASE = 200 ns/Div
T
SOURCE CURRENT – mA
TEMPERATURE – C
2
0
V
DD
–7–
25
= 3.3V
DD
V
INTERNAL VOLTAGE
FULL SCALE CODE
T
V
DD
V
DD
REFERENCE
CHANGE 00H-FFH
A
DD
4
OUT
= +25 C
= 5 V
50
OR GND
= 5.5V
= 3V
75
6
100
125
8
Figure 10. Exiting Power-Down (Full
Power-Down)
Figure 7. Typical Supply Current
vs. Supply Voltage
Figure 4. Output Source Current
Capability with V
2
1
3.25
2.75
2.25
1.75
1.25
7.0
6.0
5.0
4.0
3.0
2.0
1.0
3.5
3.0
2.5
2.0
1.5
1.0
2.5
AD7302 POWER-UP TIME
V
INTERNAL REFERENCE
DAC IN POWER-DOWN INITIALLY
V
0
DD
OUT
BOTH DACS ACTIVE
INTERNAL REFERENCE USED
LOGIC INPUTS = V
T
PD
= 5V
A
V
INTERNAL REFERENCE
DAC REGISTER LOADED
T
LOGIC INPUTS = V
CH1 = 2V/div, CH2 = 5V/Div,
WITH FFHex
A
DD
= +25 C
1
3.0
= +25 C
TIME BASE = 2 µs/Div
= 3V
SOURCE CURRENT – mA
2
3.5
V
3
DD
DD
4.0
– Volts
IH
4
OR V
DD
= 3 V
OR GND
5
4.5
IL
6
5.0
7
5.5
8