AD817ANZ Analog Devices Inc, AD817ANZ Datasheet - Page 11
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AD817ANZ
Manufacturer Part Number
AD817ANZ
Description
IC OPAMP HS LP 8-DIP
Manufacturer
Analog Devices Inc
Specifications of AD817ANZ
Slew Rate
350 V/µs
Applications
General Purpose
Number Of Circuits
1
-3db Bandwidth
50MHz
Current - Supply
7mA
Current - Output / Channel
50mA
Voltage - Supply, Single/dual (±)
5 V ~ 36 V, ±2.5 V ~ 18 V
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Op Amp Type
General Purpose
No. Of Amplifiers
1
Bandwidth
50MHz
Supply Voltage Range
5V To 36V
Amplifier Case Style
DIP
No. Of Pins
8
Amplifier Type
High Speed, Low Power
Common Mode Rejection Ratio
120
Current, Input Bias
3.3 μA
Current, Input Offset
25 nA
Current, Output
50 mA
Current, Supply
7.5 mA
Harmonic Distortion
63 dB
Impedance, Thermal
100 °C/W
Package Type
Mini-PDIP-8
Resistance, Input
300 Kilohms
Temperature, Operating, Range
-40 to +85 °C
Voltage, Input
-13.4 to +14.3 V (Common-Mode)
Voltage, Noise
15 nV/sqrt Hz
Voltage, Offset
0.5 mV
Voltage, Output, High
+13.7 V
Voltage, Output, Low
-13.7 V
Voltage, Supply
±15 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AD817ANZ
Manufacturer:
ADI/亚德诺
Quantity:
20 000
REV. B
A HIGH PERFORMANCE ADC INPUT BUFFER
High performance analog to digital converters (ADCs) require
input buffers with correspondingly high bandwidths and very
low levels of distortion. Typical requirements include distortion
levels of –60 dB to –70 dB for a 1 volt p-p signal and band-
widths of 10 MHz or more. In addition, an ADC buffer may
need to drive very large capacitive loads.
The circuit of Figure 36 is useful for driving high speed convert-
ers such as the differential input of the AD733, 10-bit ADC.
This circuit may be used with other converters with only minor
modifications. Using the AD817 provides the user with the op-
tion of either operating the buffer in differential mode or from a
single +5 volt supply. Operating from a +5 volt power supply
helps to avoid overdriving the ADC—a common problem with
buffers operating at higher supply voltages.
SINGLE SUPPLY OPERATION
Another exciting feature of the AD817 is its ability to perform
well in a single supply configuration. The AD817 is ideally
suited for applications that require low power dissipation and
high output current and those which need to drive large capaci-
tive loads, such as high speed buffering and instrumentation.
Referring to Figure 37, careful consideration should be given to
the proper selection of component values. The choices for this
particular circuit are: R1+ R3//R2 combine with C1 to form a
low frequency corner of approximately 300 Hz.
500mVp-p
COMMON
MAX
V
Figure 36. A Differential Input Buffer for High Bandwidth ADCs
IN
+5V
–5V
CABLE
COAX
50
100 F
25V
100 F
25V
52.5
+V
–V
S
S
1k
1k
–11–
3
2
2
3
Combining R3 with C2 forms a low-pass filter with a corner
frequency of 1.5 kHz. This is needed to maintain amplifier
PSRR, since the supply is connected to V
divider. The values for R
the AD817’s exceptional output drive capability. In this con-
figuration, the output is centered around 2.5 V. In order to
eliminate the static dc current associated with this level, C3 was
inserted in series with R
AD817
AD817
V
IN
1k
–V
1k
+V
–V
+V
0.1 F
4
4
7
7
S
Figure 37. Single Supply Amplifier Configuration
S
S
S
C2
0.1 F
0.1 F
0.1 F
0.1 F
0.1 F
C1
6
6
R2
10k
R1
9k
R3
1k
L
L
.
2
3
and C
AD817
26
27
+V
V
ADREF43
REFERENCE
V
7
4
INA
VOLTAGE
S
INB
AD773
18MHz
10-BIT
+2.5V
ADC
L
0.01 F
3.3 F
were chosen to demonstrate
6
0.1 F
150
C3
IN
R
L
SELECT C1, R1, R2 & R3
FOR DESIRED LOW
FREQUENCY CORNER.
(R2 = R1 + R3)
through the input
AD817
C
C
200pF
OUT
L
V
OUT