参数资料
型号: LTC1090ACN
厂商: Linear Technology
文件页数: 25/28页
文件大小: 0K
描述: IC DATA ACQUIS SYS 10BIT 20-DIP
标准包装: 18
类型: 数据采集系统(DAS),ADC
分辨率(位): 10 b
采样率(每秒): 30k
数据接口: 串行
电压电源: 单/双电源
电源电压: ±5V,5V,10V
工作温度: -40°C ~ 85°C
安装类型: 通孔
封装/外壳: 20-DIP(0.300",7.62mm)
供应商设备封装: 20-PDIP
包装: 管件
6
LTC1090
1090fc
UU
U
PI FU CTIO S
#
PIN
FUNCTION
DESCRIPTION
1-8
CH0 to CH7
Analog Inputs
The analog inputs must be free of noise with respect to AGND.
9
COM
Common
The common pin defines the zero reference point for all single ended inputs. It must be free
of noise and is usually tied to the analog ground plane.
10
DGND
Digital Ground
This is the ground for the internal logic. Tie to the ground plane.
11
AGND
Analog Ground
AGND should be tied directly to the analog ground plane.
12
V
Negative Supply
Tie Vto most negative potential in the circuit. (Ground in single supply applications.)
13,14
REF , REF+
Reference Inputs
The reference inputs must be kept free of noise with respect to AGND.
15
CS
Chip Select Input
A logic low on this input enables data transfer.
16
DOUT
Digital Data Output
The A/D conversion result is shifted out of this output.
17
DIN
Data Input
The A/D configuration word is shifted into this input.
18
SCLK
Shift Clock
This clock synchronizes the serial data transfer.
19
ACLK
A/D Conversion Clock
This clock controls the A/D conversion process.
20
VCC
Positive Supply
This supply must be kept free of noise and ripple by bypassing directly to the analog ground
plane.
BLOCK DIAGRA
W
DIN
17
DOUT
16
SCLK
18
LTC1090 BD01
CH0
1
CH1
2
CH2
3
CH3
4
CH4
5
CH5
6
CH6
7
CH7
8
COM
9
VCC
20
INPUT SHIFT
REGISTER
OUTPUT
SHIFT
REGISTER
CS
15
ACLK
19
CONTROL
AND
TIMING
10-BIT
SAR
SAMPLE
AND HOLD
ANALOG
INPUT
MUX
COMP
REF –
13
10-BIT
CAPACITIVE
DAC
REF+
V–
12
AGND
11
DGND
10
14
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