参数资料
型号: AD7302BRUZ-REEL7
厂商: Analog Devices Inc
文件页数: 14/16页
文件大小: 0K
描述: IC DAC 8BIT DUAL R-R 20-TSSOP
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 1,000
设置时间: 1.2µs
位数: 8
数据接口: 并联
转换器数目: 2
电压电源: 单电源
功率耗散(最大): 24.8mW
工作温度: -40°C ~ 105°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
输出数目和类型: 2 电压,单极;2 电压,双极
采样率(每秒): 833k
Typical Performance Characteristics–AD7302
SINK CURRENT – mA
V
OUT
mV
800
0
08
24
6
720
400
240
160
80
640
560
320
480
VDD = 5V AND 3V
INTERNAL REFERENCE
TA = +25 C
DAC LOADED WITH 00HEX
Figure 2. Output Sink Current Capa-
bility with VDD = 3 V and VDD = 5 V
REFERENCE VOLTAGE – Volts
ERROR
LSBs
0.5
0
1.0 1.2
2.8
1.4
1.6
1.8
2.2
2.4
2.6
2.0
0.45
0.25
0.15
0.1
0.05
0.4
0.35
0.2
0.3
VDD = 5V
TA = +25 C
INL ERROR
DNL ERROR
Figure 5. Relative Accuracy vs.
External Reference
FREQUENCY – Hz
ATTENUATION
dB
1
10
10k
100
1k
10
5
–40
0
–5
–10
–15
–20
–25
–30
–35
VDD = 5V
EXTERNAL SINEWAVE REFERENCE
DAC REGISTER LOADED WITH FFHEX
TA = +25°C
Figure 8. Large Scale Signal
Frequency Response
SOURCE CURRENT – mA
V
OUT
Volts
02
8
46
5
4.92
4.2
4.84
4.76
4.68
4.6
4.52
4.44
4.36
4.28
VDD = 5V
INTERNAL REFERENCE
DAC REGISTER LOADED
WITH FFHEX
TA = +25°C
Figure 3. Output Source Current
Capability with VDD = 5 V
–50
–25
100
TEMPERATURE – C
5.0
3.5
2.0
I DD
mA
4.5
4.0
3.0
2.5
INTERNAL REFERENCE
LOGIC INPUTS = VDD OR GND
BOTH DACS ACTIVE
VDD = 5.5V
VDD = 3.3V
1.5
1.0
0.5
0
255075
125
Figure 6. Typical Supply Current
vs. Temperature
T
VOUT
VDD = 3V
INTERNAL VOLTAGE
REFERENCE
FULL SCALE CODE
CHANGE 00H-FFH
TA = +25°C
1
3
2
VOUT
CH1 5V, CH2 1V, CH3 20mV
TIME BASE = 200 ns/Div
WR
Figure 9. Full-Scale Settling Time
SOURCE CURRENT – mA
3.5
1.0
01
8
23
4567
3.25
2.5
2.25
1.75
1.25
3.0
2.75
2.0
1.5
V
OUT
Volts
VDD = 3V
INTERNAL REFERENCE
DAC REGISTER LOADED
WITH FFHex
TA = +25°C
Figure 4. Output Source Current
Capability with VDD = 3 V
VDD – Volts
I DD
mA
5.0
3.0
1.0
4.0
2.5
3.0
5.5
3.5
4.0
4.5
5.0
LOGIC INPUTS = VDD OR GND
LOGIC INPUTS = VIH OR VIL
BOTH DACS ACTIVE
INTERNAL REFERENCE USED
TA = +25°C
2.0
6.0
7.0
Figure 7. Typical Supply Current
vs. Supply Voltage
PD
VOUT
AD7302 POWER-UP TIME
VDD = 5V
INTERNAL REFERENCE
DAC IN POWER-DOWN INITIALLY
1
2
CH1 = 2V/div, CH2 = 5V/Div,
TIME BASE = 2 s/Div
Figure 10. Exiting Power-Down (Full
Power-Down)
–7–
REV. 0
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