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| 型号： | LT2179IS#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/12页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP MICROPOWER QUAD 14SOIC |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 4 |
| 转换速率： | 0.04 V/µs |
| 增益带宽积： | 85kHz |
| 电流 - 输入偏压： | 3nA |
| 电压 - 输入偏移： | 100µV |
| 电流 - 电源： | 17µA |
| 电压 - 电源，单路/双路(±)： | 2.2 V ~ 36 V，±1.1 V ~ 18 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 14-SO |
| 包装： | 带卷 (TR) |
LT2178/LT2179
1
21789fc
TYPICAL APPLICATION
DESCRIPTION
17A Max, Dual and Quad,
Single Supply, Precision Op Amps
The LT
2178 is a micropower dual op amp in a surface
mount standard 8-pin conguration, the LT2179 is a
micropower quad op amp offered in a surface mount
14-pin package. Both devices are optimized for single
supply operation at 5V. Specications are also provided
at
±15V supply.
The extremely low supply current is combined with true
precision specications: offset voltage is 30μV and offset
current is 50pA. Both offset parameters have low drift with
temperature. The 1.5pAP-P current noise and picoampere
offset current permit the use the megohm level source
resistors without introducing serious errors. Voltage
noise, at 0.9μVP-P, is remarkably low considering the low
supply current.
The LT2178/LT2179 can be operated from a single supply
(as low as one lithium-cell or two NiCd batteries). The input
range goes below ground. The all-NPN output stage swings
to within a few millivolts of ground while sinking current.
No power consuming pull down resistors are needed.
For surface mount applications where three times higher
supply current is acceptable, the micropower LT1077
single, LT2078 dual and LT2079 quad are recommended.
The LT1077/LT2078/LT2079 have signicantly higher
bandwidth, slew rate, lower voltage noise and better output
drive capability. For applications requiring DIP packages
refer to the LT1178/LT1179.
Self-Buffered, Dual Output, Micropower Reference
FEATURES
APPLICATIONS
n SO Package with Standard Pinout
n Supply Current per Amplier: 17μA Max
n Offset Voltage: 70μV Max
n Offset Current: 250pA Max
n Input Bias Current: 5nA Max
n Voltage Noise: 0.9μVP-P, 0.1Hz to 10Hz
n Current Noise: 1.5pAP-P, 0.1Hz to 10Hz
n Offset Voltage Drift: 0.5μV/°C
n Gain Bandwidth Product: 85kHz
n Slew Rate: 0.04V/μs
n Single Supply Operation
Input Voltage Range Includes Ground
Output Swings to Ground while Sinking Current
No Pull-Down Resistors Needed
n Output Sources and Sinks 5mA Load Current
n Battery- or Solar-Powered Systems
Portable Instrumentation
Remote Sensor Amplier
Satellite Circuitry
n Micropower Sample-and-Hold
n Thermocouple Amplier
n Micropower Filters
Supply Current vs Temperature
–
+
2
3
+
–
5
6
1/2 LT2178
1
0.1μF
250k
1M*
LT1004-1.2
4
7
2M
0.1μF
1.2365V
OUTPUT
1/2 LT2178
2.470V
OUTPUT
4V TO 9V
21789 TA01
TOTAL BATTERY CURRENT = 28mA
OUTPUT ACCURACY = 0.4% MAX
TEMPERATURE COEFFICIENT = 20ppm/°C
LOAD REGULATION = 25ppm/mA, IL ≤ 5mA, V
+ ≥ 5V
LINE REGULATION = 10ppm/V
* 0.1% FILM RESISTORS
8
TEMPERATURE (°C)
–50
SUPPLY
CURRENT
PER
AMPLIFIER
A)
–25
0
25
50
21789 TA02
75
20
18
16
14
12
10
100
VS = 15V
VS = 5V, 0V
VS = 1.5V
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.
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