參數(shù)資料
型號(hào)： LT1168
廠商： Linear Technology Corporation
元件分類： 運(yùn)動(dòng)控制電子
英文描述： Micropower single-supply CMOS Instrumentation Amplifier
中文描述： 微功耗單電源 CMOS 儀表放大器
文件頁(yè)數(shù)： 16/20頁(yè)
文件大?。?/td> 301K
代理商： LT1168
16
LT1168
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 350
μ
A 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 I
B
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
APPLICATIOU
W
U
U
2
2
–IN
PATIENT
GND
OUTPUT
1V/mV
+IN
1
1
8
R6
1M
R7
10k
R8
100
1168 F08
A
= 101
POLE AT 1kHz
5
5
4
–3V
–3V
3V
3V
7
6
8
4
7
6
–
+
1/2
LT1112
1/2
LT1112
R4
30k
R3
30k
R1
12k
C1
0.01
μ
F
R
G
6k
3
3
R2
1M
C2
0.47
μ
F
0.3Hz
HIGHPASS
C3
15nF
PATIENT/CIRCUIT
PROTECTION/ISOLATION
–
+
LT1168
G = 10
+
–
Figure 9. Precision Temperature Without Precision Resistors
1168 F09
15V
–15V
–15V
6
49.4k
R
T
V
OUT
= 1.25
7
3
8
1
2
4
22k
LT1634-1.25
PRECISION
THERMISTOR
5
R
T
–
+
LT1168
REF
Figure 10. Response of Figure 9 for Various Thermistors
TEMPERATURE (
°
C)
–40
O
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
相關(guān)PDF資料
PDF描述
LT1168CS8 Micropower single-supply CMOS Instrumentation Amplifier
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1168_06 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Power, Single Resistor Gain Programmable, Precision Instrumentation Amplifier
LT1168AC 制造商:LINER 制造商全稱:Linear Technology 功能描述:Low Power, Single Resistor Gain Programmable, Micropower Precision Instrumentation Amplifier
LT1168ACN8 功能描述:IC PREC INSTRMNT-AMP PROG 8-DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
LT1168ACN8#PBF 功能描述:IC PREC INSTRMNT-AMP PROG 8-DIP RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
LT1168ACS8 功能描述:IC PREC INSTRMNT-AMP PROG 8-SOIC RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 放大器類型:音頻 電路數(shù):2 輸出類型:- 轉(zhuǎn)換速率:5 V/µs 增益帶寬積:12MHz -3db帶寬:- 電流 - 輸入偏壓:100nA 電壓 - 輸入偏移:500µV 電流 - 電源:6mA 電流 - 輸出 / 通道:50mA 電壓 - 電源，單路/雙路(±):4 V ~ 32 V，±2 V ~ 16 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:8-TSSOP 包裝:管件
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