Low Cost, General-Purpose
High Speed JFET Amplifier
Data Sheet
Rev. G Document Feedback
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FEATURES
High speed
41 MHz, −3 dB bandwidth
125 V/µs slew rate
80 ns settling time
Input bias current of 20 pA and noise current of 10 fA/√Hz
Input voltage noise of 12 nV/√Hz
Fully specified power supplies: ±5 V to ±15 V
Low distortion: −76 dB at 1 MHz
High output drive capability
Drives unlimited capacitance load
50 mA min output current
No phase reversal when input is at rail
Available in 8-lead SOIC
APPLICATIONS
CCDs
Low distortion filters
Mixed gain stages
Audio amplifiers
Photo detector interfaces
ADC input buffers
DAC output buffers
CONNECTION DIAGRAMS
Figure 1. 8-Lead Plastic SOIC (R-8) Package
Figure 2. 16-Lead Plastic SOIC (RW-16) Package
GENERAL DESCRIPTION
The AD825 is a superbly optimized operational amplifier for
high speed, low cost, and dc parameters, making it ideally
suited for a broad range of signal conditioning and data
acquisition applications. The ac performance, gain, bandwidth,
slew rate, and drive capability are all very stable over
temperature. The AD825 also maintains stable gain under
varying load conditions.
The unique input stage has ultralow input bias current and
input current noise. Signals that go to either rail on this high
performance input do not cause phase reversals at the output.
These features make the AD825 a good choice as a buffer for
MUX outputs, creating minimal offset and gain errors.
The AD825 is fully specified for operation with dual ±5 V and
±15 V supplies. This power supply flexibility, and the low
supply current of 6.5 mA with excellent ac characteristics under
all supply conditions, makes the AD825 well-suited for many
demanding applications.
Figure 3. Performance with Rail-to-Rail Input Signals
NC = NO CONNECT
AD825
TOP VIEW
(Not to Scale)
NC
1
–IN
2
+IN
3
–V
S
4
NC
8
+V
S
7
OUTPUT
6
NC
5
00876-E-001
NC
1
NC
2
NC
3
–
INPUT
4
+INPUT
5
–V
S
6
NC
7
NC
8
NC
10
NC
16
NC
15
NC
14
+V
S
13
OUTPUT
12
NC
11
NC
9
AD825
TOP VIEW
(Not to Scale)
NC = NO CONNECT
00876-E-002
00876-E-003
10V 200ns
10V
