欢迎访问ic37.com |
会员登录 免费注册
发布采购

AD565AJD 参数 Datasheet PDF下载

AD565AJD图片预览
型号: AD565AJD
PDF下载: 下载PDF文件 查看货源
内容描述: 高速12位单片D / A转换器 [High Speed 12-Bit Monolithic D/A Converters]
分类和应用: 转换器
文件页数/大小: 11 页 / 154 K
品牌: ADI [ ADI ]
 浏览型号AD565AJD的Datasheet PDF文件第3页浏览型号AD565AJD的Datasheet PDF文件第4页浏览型号AD565AJD的Datasheet PDF文件第5页浏览型号AD565AJD的Datasheet PDF文件第6页浏览型号AD565AJD的Datasheet PDF文件第7页浏览型号AD565AJD的Datasheet PDF文件第8页浏览型号AD565AJD的Datasheet PDF文件第10页浏览型号AD565AJD的Datasheet PDF文件第11页  
AD565A/AD566A  
CONNECTING THE AD566A FOR BUFFERED VOLTAGE  
OUTPUT  
FIGURE 5. BIPOLAR CONFIGURATION  
This configuration will provide a bipolar output voltage from  
–5.000 volts to +4.9976 volts, with positive full scale occurring  
with all bits ON (all 1s).  
The standard current-to-voltage conversion connections using  
an operational amplifier are shown here with the preferred trim-  
ming techniques. If a low offset operational amplifier (AD510L,  
AD517L, AD741L, AD301AL, AD OP07) is used, excellent  
performance can be obtained in many situations without trim-  
ming (an op amp with less than 0.5 mV max offset voltage  
should be used to keep offset errors below 1/2 LSB). If a 50 Ω  
fixed resistor is substituted for the 100 trimmer, unipolar zero  
will typically be within 1/2 LSB (plus op amp offset), and full  
scale accuracy will be within 0.1% (0.25% max). Substituting a  
50 resistor for the 100 bipolar offset trimmer will give a  
bipolar zero error typically within 2 LSB (0.05%).  
R1  
100⍀  
BIPOLAR OFF  
20V SPAN  
10V SPAN  
AD566A  
9.95k⍀  
5k⍀  
R2  
100⍀  
5k⍀  
10pF  
REF  
IN  
19.95k⍀  
0.5mA  
DAC  
OUT  
I
O
8k⍀  
I
REF  
DAC  
E
The AD509 is recommended for buffered voltage-output appli-  
cations which require a settling time to 1/2 LSB of one micro-  
second. The feedback capacitor is shown with the optimum  
value for each application; this capacitor is required to compen-  
sate for the 25 picofarad DAC output capacitance.  
REF  
AD509  
10V  
+V  
I
=
AD561  
OUT  
20k⍀  
2.4k⍀  
4 
؋
 I  
REF  
؋
 CODE  
REF  
GND  
CODE  
INPUT  
POWER  
GND  
V  
MSB  
LSB  
EE  
FIGURE 4. UNIPOLAR CONFIGURATION  
This configuration will provide a unipolar 0 volt to +10 volt  
output range. In this mode, the bipolar terminal, Pin 7, should  
be grounded if not used for trimming.  
Figure 5. 5 V Bipolar Voltage Output  
STEP I . . . OFFSET ADJUST  
+15V  
Turn OFF all bits. Adjust 100 trimmer R1 to give –5.000  
output volts.  
100⍀  
100k⍀  
R1  
50k⍀  
BIPOLAR OFF  
15V  
STEP II . . . GAIN ADJUST  
Turn ON all bits. Adjust 100 gain trimmer R2 to give a read-  
ing of +4.9976 volts.  
20V SPAN  
AD566A  
9.95k⍀  
5k⍀  
5k⍀  
10V SPAN  
Please note that it is not necessary to trim the op amp to obtain  
full accuracy at room temperature. In most bipolar situations,  
an op amp trim is unnecessary unless the untrimmed offset drift  
of the op amp is excessive.  
10pF  
REF  
IN  
R2  
100⍀  
19.95k⍀  
0.5mA  
DAC  
OUT  
I
O
8k⍀  
I
REF  
DAC  
E
REF  
AD509  
10V  
+V  
I
=
AD561  
OUT  
20k⍀  
2.4k⍀  
4 
؋
 I  
REF  
؋
 CODE  
REF  
GND  
CODE  
INPUT  
POWER  
GND  
V  
EE  
MSB  
LSB  
Figure 4. 0 V to +10 V Unipolar Voltage Output  
STEP I . . . ZERO ADJUST  
Turn all bits OFF and adjust zero trimmer, R1, until the output  
reads 0.000 volts (1 LSB = 2.44 mV). In most cases this trim is  
not needed, but Pin 7 should then be connected to Pin 12.  
STEP II . . . GAIN ADJUST  
Turn all bits ON and adjust 100 gain trimmer, R2, until the  
output is 9.9976 volts. (Full scale is adjusted to 1 LSB less than  
nominal full scale of 10.000 volts.) If a 10.2375 V full scale is  
desired (exactly 2.5 mV/bit), insert a 120 resistor in series  
with the gain resistor at Pin 10 to the op amp output.  
9–  
REV. D