参数资料
型号: LTC1090ACN
厂商: Linear Technology
文件页数: 28/28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
9
LTC1090
1090fc
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Digital Input Logic Threshold vs
Supply Voltage
Input Channel Leakage Current
vs Temperature
Noise Error vs Reference Voltage
The LTC1090 is a data acquisition component which
contains the following functional blocks:
1. 10-bit successive approximation capacitive
A/D converter
2. Analog multiplexer (MUX)
3. Sample and hold (S/H)
4. Synchronous, full duplex serial interface
5. Control and timing logic
DIGITAL CONSIDERATIONS
1. Serial Interface
The LTC1090 communicates with microprocessors and
other external circuitry via a synchronous, full duplex,
four wire serial interface (see Operating Sequence). The
shift clock (SCLK) synchronizes the data transfer with
each bit being transmitted on the falling SCLK edge
and captured on the rising SCLK edge in both transmit-
ting and receiving systems. The data is transmitted and
received simultaneously (full duplex).
Operating Sequence
(Example: Differential Inputs (CH3 to CH2), Bipolar, MSB First and 10-Bit Word Length)
REFERENCE VOLTAGE, VREF (V)
0.2
PEAK-TO-PEAK
NOISE
ERROR
(LSBs)
0.5
1.0
2.0
15
LTC1090 TPC21
1.5
0.25
0.75
1.75
1.25
LTC1090 NOISE = 200V PEAK-TO-PEAK
APPLICATIO S I FOR ATIO
WU
UU
SUPPLY VOLTAGE, VCC (V)
4
0
LOGIC
THRESHOLD
(V)
1
2
3
4
56
7
8
LTC1090 TPC19
910
TA = 25°C
AMBIENT TEMPERATURE, TA (°C)
–50
INPUT
CHANNEL
LEAKAGE
CURRENT
(nA)
100
300
400
500
1000
700
0
50
75
LTC1090 TPC20
200
800
900
600
–25
25
100
125
GUARANTEED
ON CHANNEL
OFF CHANNELS
LTC1090 AI01
B9
(SB)
SHIFT A/D RESULT OUT AND
NEW CONFIGURATION WORD IN
B8
B7
B6
B5
B4
B3
B2
B1
B0
SHIFT CONFIGURATION
WORD IN
ODD/
SIGN
SGL/
DIFF
SEL1
DIN
CS
15
8
10
SCLK
DOUT
SEL0 UNI MSBF WL1 WL0
tCYC
tSMPL
tCONV
DON’T CARE
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