AD8010 Analog Devices, AD8010 Datasheet - Page 11

• Manufacturer Part Number: AD8010
• Description: Low Power, High Current Distribution Amplifier
• Manufacturer: Analog Devices

Specifications of AD8010

• -3db Bandwidth: 230MHz
• Slew Rate: 800V/µs
• Vos: 5mV
• Ib: 6µA
• # Opamps Per Pkg: 1
• Input Noise (nv/rthz): 2nV/rtHz
• Vcc-vee: 9V to 12V
• Isy Per Amplifier: 17mA
• Packages: DIP,SOIC

Closed-Loop Gain and Bandwidth
The AD8010 is a current feedback amplifier optimized for use
in high performance video and data acquisition applications.
Since it uses a current feedback architecture, its closed-loop
–3 dB bandwidth is dependent on the magnitude of the feedback
resistor. The desired closed-loop bandwidth and gain are obtained
by varying the feedback resistor (R
varying the gain resistor (R
acteristic curves and specifications for this data sheet reflect the
performance of the AD8010 using the values of R
top of the specifications table. If a greater –3 dB bandwidth
and/or slew rate is required (at the expense of video performance),
Table I provides the recommended resistor values. Figure 32
shows the test circuit and conditions used to produce Table I.
Effect of Feedback Resistor Tolerance on Gain Flatness
Because of the relationship between the 3 dB bandwidth and the
feedback resistor, the fine scale gain flatness will, to some extent,
vary with feedback resistor tolerance. It is therefore recommended
that resistors with a 1% tolerance be used if it is desired to main-
tain flatness over a wide range of production lots. In addition,
resistors of different construction have different associated para-
sitic capacitance and inductance. Metal-film resistors were used
for the bulk of the characterization for this data sheet. It is pos-
sible that values other than those indicated will be optimal for
other resistor types.
Quality of Coaxial Cable
Optimum flatness when driving a coax cable is possible only
when the driven cable is terminated at each end with a resistor
matching its characteristic impedance. If the coax was ideal,
then the resulting flatness would not be affected by the length of
the cable. While outstanding results can be achieved using inex-
pensive cables, it should be noted that some variation in flatness
due to varying cable lengths may be experienced.
G
) to set the desired gain. The char-
F
) to set the bandwidth, and
F
noted at the
Package: N-8
Closed-Loop
Gain
+1
+2
+5
+10
Package: R-16
Closed-Loop
Gain
+1
+2
+5
+10
Package: SO-8
Closed-Loop
Gain
+1
+2
+5
+10
1. V
2. V
3. Bypassing per Figure 29.
Table I. –3 dB Bandwidth and Slew Rate vs. Closed-Loop
Gain and Resistor Values
O
O
= 0.2 V p-p for –3 dB Bandwidth.
= 2 V p-p for Slew Rate.
V
IN
R
453
374
348
562
R
412
392
392
604
R
392
374
348
499
F
F
F
50
( )
( )
( )
150
R
∞
374
86.6
61.9
R
∞
392
97.6
66.5
R
∞
374
86.6
54.9
G
G
G
( )
( )
( )
R
R
G
F
–3 dB BW
(MHz)
285
255
200
120
–3 dB BW
(MHz)
245
220
160
95
–3 dB BW
(MHz)
345
305
220
135
18.75
AD8010
V
OUT
800
550
800
650
Slew Rate
(V/ s)
900
900
Slew Rate
(V/ s)
900
900
550
Slew Rate
(V/ s)
950
1000
1000