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參數資料
| 型號： | LTC1040CSW#TR |
| 廠商： | Linear Technology |
| 文件頁數： | 2/12頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC COMPARATOR DUAL LOWPWR 18SOIC |
| 標準包裝： | 1,000 |
| 系列： | LTCMOS™ |
| 類型： | 通用 |
| 元件數： | 2 |
| 輸出類型： | CMOS，TTL |
| 電壓 - 電源，單路/雙路(±)： | 2.8 V ~ 16 V，±2.8 V ~ 8 V |
| 電壓 - 輸入偏移（最小值）： | 4.5mV @ ±8V |
| 電流 - 輸入偏壓（最小值）： | 300pA @ ±5V |
| 電流 - 靜態(tài)（最大值）： | 3mA |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 18-SOIC（0.295"，7.50mm 寬） |
| 安裝類型： | 表面貼裝 |
| 包裝： | 帶卷 (TR) |
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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