ADA4861-3YRZ Analog Devices Inc, ADA4861-3YRZ Datasheet - Page 14

• Manufacturer Part Number: ADA4861-3YRZ
• Description: IC OPAMP CF TRPL LP 100MA 14SOIC
• Manufacturer: Analog Devices Inc

Specifications of ADA4861-3YRZ

• Slew Rate: 910 V/µs
• Amplifier Type: Current Feedback
• Number Of Circuits: 3
• -3db Bandwidth: 370MHz
• Current - Input Bias: 2.9µA
• Voltage - Input Offset: 100µV
• Current - Supply: 17.9mA
• Current - Output / Channel: 100mA
• Voltage - Supply, Single/dual (±): 5 V ~ 12 V, ±2.5 V ~ 6 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Op Amp Type: High Speed
• No. Of Amplifiers: 3
• Bandwidth: 730MHz
• Supply Voltage Range: 5V To 12V
• Amplifier Case Style: SOIC
• No. Of Pins: 14
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Output Type: -
• Gain Bandwidth Product: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADA4861-3
RGB VIDEO DRIVER
Figure 50 shows a typical RGB driver application using bipolar
supplies. The gain of the amplifier is set at +2, where R
301 Ω. The amplifier inputs are terminated with shunt 75 Ω
resistors, and the outputs have series 75 Ω resistors for proper
video matching. In Figure 50, the POWER-DOWN pins are not
shown connected to any signal source for simplicity. If the
power-down function is not used, it is recommended that the
power-down pins be tied to the negative supply and not be left
floating (not connected).
For applications that require a fixed gain of +2, consider using
the
another high performance triple current feedback amplifier that
can simplify design and reduce board area.
DRIVING TWO VIDEO LOADS
In applications that require two video loads be driven
simultaneously, the ADA4861-3 can deliver. Figure 51 shows
the ADA4861-3 configured with dual video loads. Figure 52
shows the dual video load 0.1 dB bandwidth performance.
ADA4862-3
V
V
V
IN
IN
IN
(G)
(R)
(B)
75Ω
75Ω
75Ω
301Ω
301Ω
301Ω
R
R
R
with integrated R
G
G
G
PD1
PD2
PD3
Figure 50. RGB Video Driver
10
12
13
5
6
9
3
2
301Ω
301Ω
301Ω
1
R
R
R
F
F
F
F
and R
–V
+V
11
4
S
S
14
G.
7
8
0.1µF
0.1µF
10µF
10µF
The
75Ω
75Ω
75Ω
ADA4862-3
V
V
V
OUT
OUT
OUT
F
(R)
(G)
(B)
= R
G
is
Rev. A | Page 14 of 16
=
V
POWER-DOWN PINS
The ADA4861-3 is equipped with three independent POWER
DOWN pins, one for each amplifier. This allows the user the
ability to reduce the quiescent supply current when an amplifier
is inactive. The power-down threshold levels are derived from
the voltage applied to the −V
applications, this is especially useful with conventional logic
levels. The amplifier is powered down when the voltage applied
to the POWER DOWN pins is greater than −V
single-supply application, this is > +1 V (that is, 0 V + 1 V), in a
±5 V supply application, the voltage is > −4 V. The amplifier is
enabled whenever the POWER DOWN pins are left either open
or the voltage on the POWER DOWN pins is lower than 1 V
above −V
connect them to the negative supply.
IN
Figure 52. Large Signal Frequency Response for Various Supplies, R
CABLE
75Ω
–0.1
–0.2
–0.3
–0.4
–0.5
–0.6
–0.7
–0.8
–0.9
0.1
0
Figure 51. Video Driver Schematic for Two Video Loads
301Ω
S
1
. If the POWER DOWN pins are not used, it is best to
R
G
75Ω
ADA4861-3
+
–
+V
–V
S
S
FREQUENCY (MHz)
10
S
pin. When used in single-supply
10µF
0.1µF
0.1µF
10µF
301Ω
R
F
75Ω
75Ω
100
V
R
V
S
CABLE
CABLE
S
L
OUT
+ 1 V. In a
75Ω
75Ω
= ±5V
= 75Ω
= 2V p-p
75Ω
75Ω
L
400
= 75 Ω
V
V
OUT
OUT
1
2