Datasheet

Low Cost, Precision JFET
Input Operational Amplifiers
ADA4000-1/ADA4000-2/ADA4000-4
Rev. A
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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 +V
S
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
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
O
UT 1
V– 2
+IN 3
V+ 5
–IN 4
ADA4000-1
TOP VIEW
(Not to Scale)
05791-001
Figure 1. 5-Lead TSOT (UJ-5)
NC 1
–IN 2
+IN 3
V–
4
NC 8
V+ 7
OUT 6
NC
5
NC = NO CONNECT
ADA4000-1
TOP VIEW
(Not to Scale)
05791-002
Figure 2. 8-Lead SOIC (R-8)
OUT A 1
–IN A
2
+IN A 3
–V 4
+V 8
OUT B
7
–IN B 6
+IN B 5
ADA4000-2
TOP VIEW
(Not to Scale)
05791-027
Figure 3. 8-Lead SOIC (R-8)
OUT A 1
–IN A 2
+IN A
3
–V
4
+V 8
OUT B 7
–IN B
6
+IN B
5
ADA4000-2
TOP VIEW
(Not to Scale)
05791-028
Figure 4. 8-Lead MSOP (RM-8)
OUT A 1
–IN A
2
+IN A 3
+V
4
OUT D 14
–IN D
13
+IN D 12
–V
11
+IN B 5 +IN C 10
–IN B 6 –IN C 9
OUT B 7 OUT C 8
ADA4000-4
TOP VIEW
(Not to Scale)
05791-029
Figure 5. 14-Lead SOIC (R-14)
ADA4000-4
1
2
3
4
5
6
7
–IN A
+IN A
+V
OUT B
–IN B
+IN B
OUT A
14
13
12
11
10
9
8
–IN D
+IN D
–V
OUT C
–IN C
+IN C
OUT D
TOP VIEW
(Not to Scale)
05791-030
Figure 6. 14-Lead TSSOP (RU-14)