参数资料
型号: AD7398BRU-REEL7
厂商: Analog Devices Inc
文件页数: 22/24页
文件大小: 0K
描述: IC DAC 12BIT QUAD SRL 16-TSSOP
产品培训模块: Data Converter Fundamentals
DAC Architectures
标准包装: 1,000
设置时间: 6µs
位数: 12
数据接口: 串行,SPI?
转换器数目: 4
电压电源: 双 ±
功率耗散(最大): 16mW
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 16-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 16-TSSOP
包装: 带卷 (TR)
输出数目和类型: 4 电压,单极
采样率(每秒): 167k
AD7398/AD7399
Rev. C | Page 7 of 24
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
02179-
005
1
VOUTB
16
VOUTC
2
VOUTA
15
VOUTD
3
VSS
14
VDD
4
VREFA
13
VREFC
5
VREFB
12
VREFD
6
GND
11
SDI
7
LDAC
10
CLK
8
RS
9
CS
AD7398/
AD7399
TOP VIEW
(Not to Scale)
Figure 5. Pin Configuration
Table 4. Pin Function Descriptions
Table 5. Control Logic Truth Table
CS
CLK
LDAC
Serial Shift Register Function
Input Register Function
DAC Register
H
X
H
No effect
L
H
No effect
L
↑+
H
Shift register data advanced one bit
Latched
No effect
L
H
No effect
Latched
No effect
↑+
L/H
H
No effect
Updated with shift register contents
No effect
H
X
L
No effect
Latched
Transparent
H
X
↑+
No effect
Latched
NOTES
1.
↑+ = Positive logic transition; ↓– = Negative logic transition; X = Don’t Care.
2. At power-on, both the input register and the DAC register are loaded with all zeros.
3. During power shutdown, reprogramming of any internal registers can take place, but the output amplifiers do not produce the new values until the part is taken out
of shutdown mode.
4. The LDAC input is a level-sensitive input that controls the four DAC registers.
Pin No.
Mnemonic
Description
1
VOUTB
DAC B Voltage Output.
2
VOUTA
DAC A Voltage Output.
3
VSS
Negative Power Supply Input. Specified range of operation 0 V to 5.5 V.
4
VREFA
DAC A Reference Voltage Input Terminal. Establishes DAC A full-scale output voltage. Pin can be tied to VDD pin or VSS pin.
5
VREFB
DAC B Reference Voltage Input Terminal. Establishes DAC B full-scale output voltage. Pin can be tied to VDD pin or VSS pin.
6
GND
Ground Pin.
7
LDAC
Load DAC Register Strobe. Level sensitive active low. Transfers all input register data to DAC registers.
Asynchronous active low input. See Table 5 for operation.
8
RS
Resets Input and DAC Registers to All Zero Codes. Shift register contents unchanged.
9
CS
Chip Select. Active low input. Disables shift register loading when high. Transfers serial register data to the input
register when CS returns high. Does not effect LDAC operation.
10
CLK
Schmitt Triggered Clock Input. Positive edge clocks data into shift register.
11
SDI
Serial Data Input. Input data loads directly into the shift register.
12
VREFD
DAC D Reference Voltage Input Terminal. Establishes DAC D full-scale output voltage. Pin can be tied to VDD pin or VSS pin.
13
VREFC
DAC C Reference Voltage Input Terminal. Establishes DAC C full-scale output voltage. Pin can be tied to VDD pin or VSS pin.
14
VDD
Positive Power Supply Input. Specified range of operation 3 V to 5 V ± 10%.
15
VOUTD
DAC D Voltage Output.
16
VOUTC
DAC C Voltage Output.
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