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參數(shù)資料
| 型號： | AD8630WARZ-RL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 10/24頁 |
| 文件大小： | 0K |
| 描述： | IC OPAMP CHOPPER R-R QUAD 14SOIC |
| 標準包裝： | 2,500 |
| 放大器類型： | 零漂移 |
| 電路數(shù)： | 4 |
| 輸出類型： | 滿擺幅 |
| 轉(zhuǎn)換速率： | 1 V/µs |
| 增益帶寬積： | 2.5MHz |
| -3db帶寬： | 2.5MHz |
| 電流 - 輸入偏壓： | 100pA |
| 電壓 - 輸入偏移： | 1µV |
| 電流 - 電源： | 850µA |
| 電流 - 輸出 / 通道： | 30mA |
| 電壓 - 電源，單路/雙路(±)： | 2.7 V ~ 5 V，±1.35 V ~ 2.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 14-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 14-SOIC |
| 包裝： | 帶卷 (TR) |
AD8628/AD8629/AD8630
Data Sheet
Rev. J | Page 18 of 24
TIME (500s/DIV)
VOL
TA
G
E
(
V)
VOUT
0V
VIN
02
73
5-
056
CH1 = 50mV/DIV
CH2 = 1V/DIV
AV = –50
Figure 59. Negative Input Overload Recovery for the AD8628
TIME (500s/DIV)
VOL
TA
G
E
(
V)
VOUT
0V
VIN
02
73
5-
0
57
CH1 = 50mV/DIV
CH2 = 1V/DIV
AV = –50
Figure 60. Negative Input Overload Recovery for Competitor A
TIME (500s/DIV)
VOL
TA
G
E
(
V)
VOUT
0V
VIN
02
73
5-
05
8
CH1 = 50mV/DIV
CH2 = 1V/DIV
AV = –50
Figure 61. Negative Input Overload Recovery for Competitor B
The results shown in Figure 56 to Figure 61 are summarized in
Table 5. Overload Recovery Time
Model
Positive Overload
Recovery (μs)
Negative Overload
Recovery (μs)
6
9
Competitor A
650
25,000
Competitor B
40,000
35,000
INFRARED SENSORS
Infrared (IR) sensors, particularly thermopiles, are increasingly
being used in temperature measurement for applications as wide
ranging as automotive climate control, human ear thermometers,
home insulation analysis, and automotive repair diagnostics.
The relatively small output signal of the sensor demands high
gain with very low offset voltage and drift to avoid dc errors.
If interstage ac coupling is used, as in Figure 62, low offset and
drift prevent the output of the input amplifier from drifting close to
saturation. The low input bias currents generate minimal errors
from the output impedance of the sensor. As with pressure sensors,
the very low amplifier drift with time and temperature eliminate
additional errors once the temperature measurement is calibrated.
The low 1/f noise improves SNR for dc measurements taken
over periods often exceeding one-fifth of a second.
Figure 62 shows a circuit that can amplify ac signals from 100 μV to
300 μV up to the 1 V to 3 V levels, with a gain of 10,000 for
accurate analog-to-digital conversion.
5V
100k
10k
5V
100V TO 300V
100
TO BIAS
VOLTAGE
10k
fC ≈ 1.6Hz
IR
DETECTOR
100k
10F
1/2 AD8629
027
35-
059
Figure 62. AD8629 Used as Preamplifier for Thermopile
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