参数资料
型号: LTC1392IS8#PBF
厂商: Linear Technology
文件页数: 6/12页
文件大小: 252K
描述: IC DATA ACQ SYSTEM 10BIT 8-SOIC
标准包装: 100
功能: 温度监控系统(传感器)
传感器类型: 内部
感应温度: -40°C ~ 85°C
精确度: ±4°C
拓扑: ADC,多路复用器,电压基准
输出类型: 并联,串行
输出警报:
输出风扇:
电源电压: 4.5 V ~ 6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-SOIC(0.154",3.90mm 宽)
供应商设备封装: 8-SOIC
包装: 管件
6
LTC1392
TEST CIRCUITS
Voltage Waveforms for t
dis
D
OUT
WAVEFORM 1
(SEE NOTE 1)
2.0V
t
dis
90%
10%
D
OUT
WAVEFORM 2
(SEE NOTE 2)
CS
NOTE 1: WAVEFORM 1 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH
THAT THE OUTPUT IS HIGH UNTIL DISABLED BY THE OUTPUT CONTROL.
NOTE 2: WAVEFORM 2 IS FOR AN OUTPUT WITH INTERNAL CONDITIONS SUCH
THAT THE OUTPUT IS LOW UNTIL DISABLED BY THE OUTPUT CONTROL.
LTC1392 " TC06
APPLICATIONS INFORMATION
U
U
U
DIGITAL CONSIDERATIONS
Serial Interface
The LTC1392 communicates with microprocessors and
other external circuitry via a synchronous, half-duplex,
3-wire serial interface (see Figure 1). The clock (CLK)
synchronizes the data transfer with each bit being trans-
mitted on the falling CLK edge and captured on the rising
CLK edge in both transmitting and receiving systems. The
input data is first received and then the A/D conversion
result is transmitted (half-duplex). Half-duplex operation
allows D
IN
 and D
OUT
 to be tied together allowing transmis-
sion over three wires: CS, CLK and DATA (D
IN
/D
OUT
). Data
transfer is initiated by a falling chip select (CS) signal. After
the falling CS is recognized, an 80祍 delay is needed for
The LTC1392 is a micropower data acquisition system
designed to measure temperature, an on-chip power
supply voltage and a differential input voltage. The LTC1392
contains the following functional blocks:
1. On-chip temperature sensor
2. 10-bit successive approximation capacitive ADC
3. Bandgap reference
4. Analog multiplexer (MUX)
5. Sample-and-hold (S/H)
6. Synchronous, half-duplex serial interface
7. Control and timing logic
Load Circuit for t
dDO
, t
r
 and t
f
D
OUT
1.4V
3k
100pF
TEST POINT
LTC1392 " TC02
Voltage Waveforms for D
OUT
 Delay Time, t
dDO
CLK
D
OUT
V
IL
t
dDO
V
OL
V
OH
LTC1392 " TC03
Load Circuit for t
dis
 and t
en
D
OUT
3k
100pF
TEST POINT
5V t
dis
 WAVEFORM 2, t
en
t
dis
 WAVEFORM 1
LTC1392 " TC05
Voltage Waveforms for D
OUT
 Rise and Fall Times, t
r
 and t
f
D
OUT
V
OL
V
OH
t
r
t
f
1392 TC04
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LTC1392IS8 IC DATA ACQ SYSTEM 10BIT 8-SOIC
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