AD797BRZ-REEL Analog Devices Inc, AD797BRZ-REEL Datasheet - Page 16

• Manufacturer Part Number: AD797BRZ-REEL
• Description: IC,Operational Amplifier,SINGLE,BIPOLAR,SOP,8PIN,PLASTIC
• Manufacturer: Analog Devices Inc

Specifications of AD797BRZ-REEL

• Amplifier Type: General Purpose
• Number Of Circuits: 1
• Slew Rate: 20 V/µs
• Gain Bandwidth Product: 110MHz
• -3db Bandwidth: 8MHz
• Current - Input Bias: 250nA
• Voltage - Input Offset: 10µV
• Current - Supply: 8.2mA
• Current - Output / Channel: 50mA
• Voltage - Supply, Single/dual (±): ±5 V ~ 15 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD797
Differential Line Receiver
The differential receiver circuit of Figure 46 is useful for many
applications, from audio to MRI imaging. The circuit allows
extraction of a low level signal in the presence of common-
mode noise. As shown in Figure 47, the AD797 provides this
function with only 9 nV/√Hz noise at the output. Figure 48
shows the AD797 20-bit THD performance over the audio band
and the 16-bit accuracy to 250 kHz.
16
14
12
10
8
6
10
DIFFERENTIAL
Figure 47. Output Voltage Noise Spectral Density
INPUT
**
100
*
1kΩ
1kΩ
Figure 46. Differential Line Receiver
OPTIONAL
USE THE POWER SUPPLY BYPASSING
SHOWN IN FIGURE 35.
for Differential Line Receiver
+V
1k
2
3
S
1kΩ
20pF
FREQUENCY (Hz)
AD797
7
**
20pF
1kΩ
10k
**
8
4
–V
50pF*
S
6
100k
1M
10M
Rev. H | Page 16 of 20
A General-Purpose ATE/Instrumentation I/O Driver
The ultralow noise and distortion of the AD797 can be
combined with the wide bandwidth, slew rate, and load drive
of a current feedback amplifier to yield a very wide dynamic
range general-purpose driver. The circuit shown in Figure 49
combines the AD797 with the AD811 in just such an application.
Using the component values shown, this circuit is capable of
better than −90 dB THD with a ±5 V, 500 kHz output signal.
The circuit is, therefore, suitable for driving a high resolution
ADC as an output driver in automatic test equipment (ATE)
systems. Using a 100 kHz sine wave, the circuit drives a 600 Ω
load to a level of 7 V rms with less than −109 dB THD and a
10 kΩ load at less than −117 dB THD.
V
IN
–100
–110
–120
–130
R2
–90
*USE THE POWER SUPPLY BYPASSING SHOWN IN FIGURE 35.
100
Figure 49. A General-Purpose ATE/Instrumentation I/O Driver
1kΩ
Figure 48. Total Harmonic Distortion (THD) vs. Frequency
2
3
300
AD797
+V
–V
1k
for Differential Line Receiver
7
4
S
S
22pF
2kΩ
FREQUENCY (Hz)
*
*
6
649Ω
3k
MEASUREMENT
10k
649Ω
3
2
OPTIONAL
AD811
50pF C
30k
LIMIT
WITHOUT
OPTIONAL
50pF C
WITH
+V
–V
7
4
S
S
N
N
100k
6
*
*
300k
0.003
0.001
0.0003
0.0001
V
OUT