参数资料
型号: DAC8222GPZ
厂商: Analog Devices Inc
文件页数: 3/15页
文件大小: 0K
描述: IC DAC 12BIT DUAL W/BUFF 24DIP
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 15
设置时间: 1µs
位数: 12
转换器数目: 2
电压电源: 单电源
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 24-DIP(0.300",7.62mm)
供应商设备封装: 24-PDIP
包装: 管件
输出数目和类型: 2 电流,单极;2 电流,双极
采样率(每秒): 1M
DAC8222
–11–
REV. C
Figure 25. Bipolar Configuration (Four-Quadrant Multiplication)
resistors R5, R6, R7, should be ratio-matched to 0.01% so that
gain error meets data sheet specifications. (Corresponding resis-
tors, R8, R9, and R10 for DAC B should also be matched to
0.01%). The resistors should have identical temperature coeffi-
cients if operating over the full temperature range.
Zero and full-scale are adjusted one of two ways and are at the
user’s discretion. Zero-output can be adjusted by first setting
the digital inputs to 1000 0000 0000 and adjusting R1 (R3 for
DAC B) so that VOUTA (or VOUT B) equals 0 V. If R1, R2 (R3,
R4 for DAC B) are omitted, then VOUT = 0 V can be adjusted
by varying R6, R7 (R9, R10 for DAC B) ratios. Full-scale is ad-
justed by setting the digital inputs to 1111 1111 1111 and vary-
ing R5 (R8 for DAC B). Full-scale can also be adjusted by
varying VREF. Full-scale output is equal to VREF minus one LSB.
Table III. Bipolar (Offset Binary) Code Table
(Refer to Figure 25)
Binary Number in
DAC Register
Analog Output, VOUT
MSB
LSB
(
DAC A or DAC B)
1111 1111 1111
+VREF
2047
2048
1000 0000 0001
+VREF
1
2048
1000 0000 0000
0 V
0111 1111 1111
–VREF
1
2048
0000 0000 0000
–VREF
2048
NOTE
1 LSB = (2
–11) (V
REF) =
1
2048
(VREF)
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