參數(shù)資料
型號: LT1168CS8
廠商: Linear Technology
文件頁數(shù): 8/20頁
文件大?。?/td> 0K
描述: IC AMP INSTR PROG PREC LP 8SOIC
標(biāo)準(zhǔn)包裝: 100
放大器類型: 儀表
電路數(shù): 1
轉(zhuǎn)換速率: 0.5 V/µs
增益帶寬積: 400kHz
電流 - 輸入偏壓: 80pA
電壓 - 輸入偏移: 20µV
電流 - 電源: 350µA
電流 - 輸出 / 通道: 32mA
電壓 - 電源,單路/雙路(±): 4.6 V ~ 36 V,±2.3 V ~ 18 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SO
包裝: 管件
16
LT1168
1168fa
a ground for the common mode signal. C1 was chosen to
maintain the stability of the patient ground. The LT1168’s
high CMRR ensures that the desired differential signal is
amplified and unwanted common mode signals are at-
tenuated. Since the DC portion of the signal is not impor-
tant, R6 and C2 make up a 0.3Hz highpass filter. The AC
signal at LT1112’s Pin 5 is amplified by a gain of 101 set
by R7/R8 +1. The parallel combination of C3 and R7 form
a lowpass filter that decreases this gain at frequencies
above 1kHz. The ability to operate at
±3V on 350A of
supply current makes the LT1168 ideal for battery-pow-
ered applications. Total supply current for this application
is 1.05mA. Proper safeguards, such as isolation, must be
added to this circuit to protect the patient from possible
harm.
Low IB Favors High Impedance Bridges, Lowers
Dissipation
The LT1168’s low supply current, low supply voltage
operation and low input bias currents allow it to fit nicely
into battery-powered applications. Low overall power
dissipation necessitates using higher impedance bridges.
The single supply pressure monitor application on the
front of this data sheet, shows the LT1168 connected to
the differential output of a 3.5k bridge. The picoampere
input bias currents keep the error caused by offset current
to a negligible level. The LT1112 level shifts the LT1168’s
reference pin and the ADC’s analog ground pins above
ground. The LT1168’s and LT1112’s combined power
dissipation is still less than the bridge’s. This circuit’s total
supply current is just 2.2mA.
Figure 8. Nerve Impulse Amplifier
APPLICATIO S I FOR ATIO
WU
UU
2
–IN
PATIENT
GND
OUTPUT
1V/mV
+IN
1
8
R6
1M
R7
10k
R8
100
1168 F08
AV = 101
POLE AT 1kHz
5
4
–3V
3V
7
6
8
4
7
6
+
1/2
LT1112
1/2
LT1112
R4
30k
R3
30k
R1
12k
C1
0.01
F
RG
6k
3
R2
1M
C2
0.47
F
0.3Hz
HIGHPASS
C3
15nF
PATIENT/CIRCUIT
PROTECTION/ISOLATION
+
LT1168
G = 10
+
Figure 9. Precision Temperature Without Precision Resistors
1168 F09
15V
–15V
6
49.4k
RT
VOUT = 1.25
7
3
8
1
2
4
22k
LT1634-1.25
PRECISION
THERMISTOR
5
RT
+
LT1168
REF
Figure 10. Response of Figure 9 for Various Thermistors
TEMPERATURE (
°C)
–40
OUTPUT
VOLTAGE
(V)
8
10
12
80
100
1168 F10
6
4
0
–20
20
40
60
120
2
0
14
YSI #44006
YSI #44011
THERMOMETRICS
DC95F103W
THERMO
METRICS
DC95G104Z
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LT1168CS8#TR 功能描述:IC AMP INSTR PROG PREC LP 8SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源,單路/雙路(±):2 V ~ 44 V,±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP(5x3) 包裝:管件
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