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PDF ADA4000-1 Data sheet ( Hoja de datos )
| Número de pieza | ADA4000-1 | |
| Descripción | (ADA4000-1/-2/-4) Low Cost Precision JFET Input Operational Amplifiers | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ADA4000-1 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Low Cost, Precision JFET
Input Operational Amplifiers
ADA4000-1/ADA4000-2/ADA4000-4
FEATURES
High slew rate: 20 V/μs
Fast settling time
Low offset voltage: 1.70 mV maximum
Bias current: 40 pA maximum
±4 V to ±18 V operation
Low voltage noise: 16 nV/√Hz
Unity gain stable
Common-mode voltage includes +VS
Wide bandwidth: 5 MHz
APPLICATIONS
Reference gain/buffers
Level shift/driving
Active filters
Power line monitoring/control
Current/voltage sense or monitoring
Data acquisition
Sample-and-hold circuits
Integrators
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GENERAL DESCRIPTION
The ADA4000-1/ADA4000-2/ADA4000-4 are JFET input
operational amplifiers featuring precision, very low bias current,
and low power. Combining high input impedance, low input
bias current, wide bandwidth, fast slew rate, and fast settling
time, the ADA4000-1/ADA4000-2/ADA4000-4 are ideal
amplifiers for driving analog-to-digital inputs and buffering
digital-to-analog converter outputs. The input common-mode
voltage includes the positive power supply, which makes the
part an excellent choice for high-side signal conditioning.
Additional applications for the ADA4000-1/ADA4000-2/
ADA4000-4 include electronic instruments, ATE amplification,
buffering, integrator circuits, instrumentation-quality photodiode
amplification, and fast precision filters (including PLL filters).
The parts also include utility functions, such as reference
buffering, level shifting, control I/O interface, power supply
control, and monitoring functions.
PIN CONFIGURATIONS
OUT 1 ADA4000-1 5 V+
V– 2 TOP VIEW
(Not to Scale)
+IN 3
4 –IN
Figure 1. 5-Lead TSOT (UJ-5)
NC 1
8 NC
–IN 2 ADA4000-1 7 V+
+IN 3 TOP VIEW 6 OUT
V– 4 (Not to Scale) 5 NC
NC = NO CONNECT
Figure 2. 8-Lead SOIC (R-8)
OUT A 1
8 +V
–IN A 2 ADA4000-2 7 OUT B
+IN A 3 TOP VIEW 6 –IN B
–V 4 (Not to Scale) 5 +IN B
Figure 3. 8-Lead SOIC (R-8)
OUT A 1
8 +V
–IN A 2 ADA4000-2 7 OUT B
+IN A 3 TOP VIEW 6 –IN B
–V 4 (Not to Scale) 5 +IN B
Figure 4. 8-Lead MSOP (RM-8)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3 ADA4000-4 12 +IN D
+V 4 TOP VIEW 11 –V
+IN B 5 (Not to Scale) 10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 5. 14-Lead SOIC (R-14)
OUT A 1
14 OUT D
–IN A 2
13 –IN D
+IN A 3
+V 4
+IN B 5
ADA4000-4 12 +IN D
TOP VIEW
(Not to Scale)
11 –V
10 +IN C
–IN B 6
9 –IN C
OUT B 7
8 OUT C
Figure 6. 14-Lead TSSOP (RU-14)
Rev. 0
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
©2007 Analog Devices, Inc. All rights reserved.
1 page  
ABSOLUTE MAXIMUM RATINGS
Table 3.
Parameter
Supply Voltage
Input Voltage
Differential Input Voltage
Output Short-Circuit Duration to GND
Storage Temperature Range
Operating Temperature Range
Junction Temperature Range
Lead Temperature (Soldering, 10 sec)
Rating
±18 V
±V supply
±V supply
Indefinite
−65°C to +150°C
−40°C to +125°C
−65°C to +150°C
300°C
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.
ADA4000-1/ADA4000-2/ADA4000-4
THERMAL RESISTANCE
θJA is specified for the worst-case conditions, that is, a device
soldered in a circuit board for surface-mount packages.
Table 4. Thermal Resistance
Package Type
5-Lead TSOT (UJ-5)
8-Lead SOIC (R-8)
8-Lead MSOP (RM-8)
14-Lead SOIC (R-14)
14-Lead TSSOP (RU-14)
θJA
172.92
112.38
141.9
88.2
114
θJC
61.76
61.6
43.7
56.3
23.3
Unit
°C/W
°C/W
°C/W
°C/W
°C/W
POWER SEQUENCING
The op amp supply voltages must be established simultaneously
with, or before, any input signals are applied. If this is not
possible, the input current must be limited to 10 mA.
ESD CAUTION
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Rev. 0 | Page 5 of 16
5 Page 
ADA4000-1/ADA4000-2/ADA4000-4
SETTLING TIME
Settling time is the amount of time it takes the amplifier output
to reach and remain within a percentage of its final value. This
is an important parameter in data acquisition systems. Because
most bipolar DAC converters have current output, an external
op amp is required to convert the current to voltage. Therefore,
the amplifier settling time plays a role in the total settling time
of the output signal. A good approximation for the total settling
time is
( ) ( )t S Total = t S DAC 2 + t S AMP 2
The input signal is a 10 V pulse and the output is the error
signal for the settling time shown in Figure 33.
5V/DIV
200mV/DIV
The ADA4000-1/ADA4000-2/ADA4000-4 settle to within 0.1%
of their final value in less than 1.2 μs. The settling time has been
tested by using the configuration circuit in Figure 34.
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10V p-p
+15V
3
V+
0 ADA4000-1 1 10kΩ
10kΩ 2
V–
V1
–15V
10kΩ
10kΩ
200ns/DIV
Figure 33. Settling Time Measurement Using the False Summing Node Method
+15V
8
V+
AD828
V–
4
–15V
20kΩ
1kΩ
VOUT
Figure 34. Settling Time Test Circuit
Rev. 0 | Page 11 of 16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet ADA4000-1.PDF ] | |
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