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부품번호 | AD8682 기능 |
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기능 | High Speed JFET Operational Amplifiers | ||
제조업체 | Analog Devices | ||
로고 | |||
전체 16 페이지수
Dual/Quad Low Power, High Speed
JFET Operational Amplifiers
AD8682/AD8684
FEATURES
Low supply current: 250 μA/amp maximum
High slew rate: 9 V/μs
Bandwidth: 3.5 MHz typical
Low offset voltage: 1 mV maximum @ 25°C
Low input bias current: 20 pA maximum @ 25°C
CMRR: 90 dB typical
Fast settling time
Unity-gain stable
APPLICATIONS
Portable telecommunications
Low power industrial and instrumentation
Loop filters
Active and precision filters
Integrators
Strain gauge amplifiers
Portable medical instrumentation
Supply current monitoring
GENERAL DESCRIPTION
The AD8682 and AD8684 are dual and quad low power, precision
(1 mV) JFET amplifiers featuring excellent speed at low supply
currents. The slew rate is typically 9 V/μs with a supply current
under 250 μA per amplifier. These unity-gain stable amplifiers
have a typical gain bandwidth of 3.5 MHz. The JFET input stage
ensures bias current is typically a few picoamps and below
125 pA maximum over the full temperature operating range.
PIN CONFIGURATIONS
OUT A 1
–IN A 2
+IN A 3
V– 4
AD8682
TOP VIEW
(Not to Scale)
8 V+
7 OUT B
6 –IN B
5 +IN B
Figure 1. 8-Lead SOIC_N and 8-Lead MSOP
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
AD8684
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
TOP VIEW
(Not to Scale)
Figure 2. 14-Lead SOIC_N and 14-Lead TSSOP
The devices are ideal for portable, low power applications,
especially with high source impedance. The devices are unity-gain
stable and can drive higher capacity loads (G = 1, noninverting),
as an example of their excellent dynamic response over a wide
range of conditions, delivering dc precision performance at low
quiescent currents.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2006–2008 Analog Devices, Inc. All rights reserved.
AD8682/AD8684
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage1
Output Short-Circuit Duration
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 60 sec)
Rating
±18 V
±18 V
36 V
Indefinite
−65°C to +150°C
−40°C to +85°C
−65°C to +150°C
300°C
1 For supply voltages less than ±18 V, the absolute maximum input voltage is
equal to the supply voltage.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
THERMAL RESISTANCE
Table 3.
Package Type
8-Lead MSOP [RM-8]
8-Lead SOIC_N [R-8]
14-Lead TSSOP [RU-14]
14-Lead SOIC_N [R-14]
θJA
210
158
180
120
ESD CAUTION
θJC Unit
45 °C/W
43 °C/W
35 °C/W
36 °C/W
Rev. B | Page 4 of 16
4페이지 16
VS = ±15V
14 TA = 25°C
12
VOL
10
VOH
8
6
4
2
0
100 1k 10k
LOAD RESISTANCE (Ω)
Figure 15. Absolute Output Voltage vs. Load Resistance
140
VS = ±15V
120 TA = 25°C
100
80 +PSRR
60
40
20 –PSRR
0
–20
–40
–60
100
1k 10k 100k
FREQUENCY (Hz)
Figure 16. AD8682 PSRR vs. Frequency
1M
14
VS = ±15V
TA = 25°C
12
10 SINK
8
SOURCE
6
4
2
0
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
Figure 17. AD8682 Short-Circuit Current vs. Temperature
AD8682/AD8684
30
VS = ±15V
TA = 25°C
25
RL = 10kΩ
AVCL = 1
20
15
10
5
0
100 1k 10k 100k
FREQUENCY (Hz)
Figure 18. Maximum Output Swing vs. Frequency
1M
140
120
100
80
60
40
20
0
–20
–40
–60
100
VS = ±15V
TA = 25°C
1k 10k 100k
FREQUENCY (Hz)
Figure 19. AD8682 CMRR vs. Frequency
1M
20
18
VS = ±15V
TA = 25°C
100 × AD8682
16 (200 OP AMPS)
14
12
10
8
6
4
2
0
–1.0 –0.8 –0.6 –0.4 –0.2 0 0.2 0.4 0.6 0.8 1.0
VOS (µV)
Figure 20. AD8682 VOS Distribution
Rev. B | Page 7 of 16
7페이지 | |||
구 성 | 총 16 페이지수 | ||
다운로드 | [ AD8682.PDF 데이터시트 ] |
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부품번호 | 상세설명 및 기능 | 제조사 |
AD8682 | High Speed JFET Operational Amplifiers | Analog Devices |
AD8684 | High Speed JFET Operational Amplifiers | Analog Devices |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |