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LT1789-1_15

更新时间： 2024-11-26 01:21:11
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
24页 336K
描述
Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifiers

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LT1789-1_15 数据手册

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LT1789-1/LT1789-10  
Micropower,  
Single Supply Rail-to-Rail  
Output Instrumentation Amplifiers  
FEATURES  
DESCRIPTION  
The LT®1789-1/LT1789-10 are micropower, precision  
instrumentation amplifiers that are optimized for single  
n
Micropower: 95μA Supply Current Max  
n
Low Input Offset Voltage: 100μV Max  
n
Low Input Offset Voltage Drift: 0.5μV/°C Max  
Single Gain Set Resistor:  
supply operation from 2.2V to 36V. The quiescent current  
is 95μA max, the inputs common mode to ground and the  
output swings within 110mV of ground. The gain is set  
with a single external resistor for a gain range of 1 to 1000  
for the LT1789-1 and 10 to 1000 for the LT1789-10.  
n
G = 1 to 1000 (LT1789-1)  
G = 10 to 1000 (LT1789-10)  
–
n
n
n
n
n
n
n
n
n
Inputs Common Mode to V  
Wide Supply Range: 2.2V to 36V Total Supply  
CMRR at G = 10: 96dB Min  
The high accuracy of the LT1789-1 (40ppm maximum non-  
linearity and 0.25% max gain error) is unmatched by other  
micropower instrumentation amplifiers. The LT1789-10  
maximizesboththeinputcommonmoderangeanddynamic  
outputrangewhenanamplificationof10orgreaterisrequired,  
allowingprecisesignalprocessingwhereotherinstrumenta-  
tion amplifiers fail to operate. The LT1789-1/LT1789-10 are  
laser trimmed for very low input offset voltage, low input  
offset voltage drift, high CMRR and high PSRR. The output  
canhandlecapacitiveloadsupto400pF(LT1789-1), 1000pF  
(LT1789-10) in any gain configuration while the inputs are  
ESD protected up to 10kV (human body).  
Gain Error: G = 10, 0.25% Max  
Gain Nonlinearity: G = 10, 40ppm Max  
Input Bias Current: 40nA Max  
PSRR at G = 10: 100dB Min  
1kHz Voltage Noise: 48nV/√Hz  
0.1Hz to 10Hz Noise: 1.5μV  
P-P  
APPLICATIONS  
n
Portable Instrumentation  
n
Bridge Amplifiers  
n
Strain Gauge Amplifiers  
Thermocouple Amplifiers  
Differential to Single-Ended Converters  
Medical Instrumentation  
The LT1789-1/LT1789-10 are offered in the 8-pin SO  
package, requiring significantly less PC board area than  
discrete multi op amp and resistor designs.  
n
n
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
0.5A to 4A Voltage Controlled Current Source  
C1  
4700pF  
V
S
C3  
V
S
120Ω  
R1  
8k  
0.1μF  
90.9k  
–
+
2
3
7
R3  
100Ω  
TIP127*  
V
IN  
6
R2  
10k  
LT1636  
*ENSURE ADEQUATE POWER  
DISSIPATION CAPABILITY AT  
HIGHER VOLTAGES,  
V
5
S
4
7
3
8
+
–
3
4
CURRENTS AND DUTY CYCLES  
R4  
10k  
1
2
6
R
*
I
LT1789-1  
4
SENSE  
0.1Ω  
REF  
5
LOAD  
R
C2  
3300pF  
1
2
V
S
= 3.3V TO 32V  
V
IN  
I
=
LOAD  
R
• 10  
SENSE  
= 1A PER VOLT AS SHOWN  
*
LOAD  
RISE TIME ≈ 250μs, 10% TO 90%,  
1A TO 2A OUTPUT STEP INTO 0.25Ω LOAD  
1789 TA01  
1789fc  
1
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