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参数资料
| 型号： | LTC1040CSW#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/12页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR LOW PWR DUAL18SOIC |
| 标准包装： | 40 |
| 系列： | LTCMOS™ |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | CMOS，TTL |
| 电压 - 电源，单路/双路(±)： | 2.8 V ~ 16 V，±2.8 V ~ 8 V |
| 电压 - 输入偏移（最小值）： | 4.5mV @ ±8V |
| 电流 - 输入偏压（最小值）： | 300pA @ ±5V |
| 电流 - 静态（最大值）： | 3mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 18-SOIC（0.295"，7.50mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
10
LTC1040
1040fa
TYPICAL APPLICATIO S
U
Figure 10. The LTC1040 as a Linear Amplifier
VIN
VOUT
LTC1040 TA07
V+
–
+
1/2 LTC1040
C
R
V+
0V
tON
LTC1040 TA08
tOFF
VOUT = V+
tON
tON + tOFF
The LTC1040 as a Linear Amplifier
With a simple RC filter, the LTC1040 can be made to
function as a linear amplifier. By filtering the logic output
and feeding it back to the negative input, the loop forces
the output duty cycle [tON/(tON + tOFF)] so that VOUT equals
VIN (Figure 10).
The RC time constant is set to keep the ripple on the output
small. The maximum output ripple is:
V = V+/fSRC and
should be set to 0.5mV to 1mV for best results. Notice that
the higher the sampling frequency, fS, the lower RC can be.
This is important because the RC filter also sets the loop
response. A convenient way to keep fS as high as possible
under all conditions is to connect a 100k resistor to pin 16
(OSC) with no capacitance to ground.
2-Wire 0
°C to 100°C Temperature Transducer with 4mA to 20mA Output
LTC1040 TA09
6
5
7
8
10
9
18
4 1M
16
+
–
1/2
LTC1040
6
4
1k
ZERO
ADJUST
100k
3200
18k
LT1019-5
6250
YELLOW SPRINGS INSTRUMENT
PART NO. 44201
1
F
10
F
FULL-SCALE
ADJUST
ACCURACY =
+
=
±0.3°C
±0.1°C
CIRCUIT ERROR
AT 25
°C
±0.2°C
TRANSDUCER
ERROR
5k
182
50
2N6657
1N914
LM134
430
43
R
12V TO 40V
0
°C = 4mA
100
°C = 20mA
V+
V–
RETURN
+
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