参数资料
型号: SMP08FSZ-REEL
厂商: Analog Devices Inc
文件页数: 7/8页
文件大小: 0K
描述: IC AMP SAMPLE HOLD OCTAL 16SOIC
标准包装: 2,500
放大器类型: 采样和保持
电路数: 8
转换速率: 4 V/µs
电流 - 输入偏压: 500nA
电压 - 输入偏移: 2500µV
电流 - 电源: 6mA
电流 - 输出 / 通道: 1.2mA
电压 - 电源,单路/双路(±): 5 V ~ 12 V,±2.5 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 带卷 (TR)
SMP08
–7–
REV. D
VSS
SMP08
13
14
15
12
1
2
4
5
3
16
6
7
8
9
10
11
+12V
CH0
CH1
CH2
CH3
CH4
CH5
CH6
CH7
3
15
1
5
16
17
4
+12V
+5V
REF02
+12V
VREFAVDD
VOA
VZ
GND
WR
CS
DAC8228
A
B
C
ADDRESS
DECODE
ADDRESS
BUS
DIGITAL
INPUTS
WR
DGND
INH
0.1F
PIN 9
C
PIN 10
B
PIN 11
A
PIN 6
INH
CH
PIN
0
1
X
0
1
0
1
X
0
1
0
1
0
1
0
1
X
0
1
0
1
2
3
4
5
6
7
NONE
13
14
15
12
1
5
2
4
CHANNEL DECODING
Figure 18. 8-Channel Multiplexed D/A Converter
Do not apply signals to the SMP08 with power off unless the
input current is limited to less than 10 mA.
TYPICAL APPLICATIONS
AN 8-CHANNEL MULTIPLEXED D/A CONVERTER
Figure 18 illustrates a typical demultiplexing function of the
SMP08. It is used to sample-and-hold eight different output
voltages corresponding to eight different digital codes from a
D/A converter. The SMP08’s droop rate of 20 mV/s requires a
refresh once every 500 ms, before the voltage drifts beyond
1/2 LSB accuracy (1 LSB of an 8-bit DAC is equivalent to
19.5 mV out of a full-scale voltage of 5 V). For a 10-bit DAC
the refresh rate must be less than 120 ms, and, for a 12-bit
system, 31 ms. This implementation is very cost effective com-
pared to using multiple DACs as the number of output channels
increases.
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