AD8170ARZ Datasheet, PDF (1/16 Pages) Analog Devices – 250 MHz, 10 ns Switching Multiplexers w/Amplifier

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250 MHz, 10 ns Switching
Multiplexers w/Amplifier
AD8170/AD8174
FEATURES
Fully Buffered Inputs and Outputs
Fast Channel Switching: 10 ns
Internal Current Feedback Output Amplifier
High Output Drive: 50 mA
Flexible Gain Setting via External Resistor(s)
High Speed
250 MHz Bandwidth, G = +2
1000 V/␮s Slew Rate
Fast Settling Time of 15 ns to 0.1%
Low Power: < 10 mA
Excellent Video Specifications (R_L = 150 ⍀, G = +2)
Gain Flatness of 0.1 dB Beyond 80 MHz
0.02% Differential Gain Error
0.05؇ Differential Phase Error
Low Crosstalk of –78 dB @ 5 MHz
High Disable Isolation of –88 dB @ 5 MHz
High Shutdown Isolation of –92 dB @ 5 MHz
Low Cost
Fast Output Disable Feature for Connecting Multiple
Devices (AD8174 Only)
Shutdown Feature Reduces Power to 1.5 mA (AD8174 Only)
APPLICATIONS
Pixel Switching for “Picture-In-Picture”
LCD and Plasma Displays
Video Routers
PRODUCT DESCRIPTION
The AD8170(2:1) and AD8174(4:1) are very high speed
buffered multiplexers. These multiplexers offer an internal
current feedback output amplifier whose gain can be pro-
grammed via external resistors and is capable of delivering 50
mA of output current. They offer –3 dB signal bandwidth of
250 MHz and slew rate of greater than 1000 V/µs. Additionally,
the AD8170 and AD8174 have excellent video specifications
with low differential gain and differential phase error of 0.02%
and 0.05° and 0.1 dB flatness out to 80 MHz. With a low 78
dB of crosstalk and better than 88 dB isolation, these devices are
useful in many high speed applications. These are low power
devices consuming only 9.7 mA from a ± 5 V supply.
FUNCTIONAL BLOCK DIAGRAM
SELECT 1
GND 2
–V_S 3
IN0 4 +1
AD8170
+1
8 V_OUT
7 –V_IN
6 +V_S
5 IN1
IN0 1 +1
GND 2
IN1 3 +1
GND 4
2
IN2 5 +1
–V_S 6
IN3 7 +1
AD8174
14 +V_S
13 V_OUT
12 –V_IN
11 SD
10 ENABLE
9 A1
8 A0
2
The AD8174 offers a high speed disable feature allowing the
output to be put into a high impedance state for cascading
stages so that the off channels do not load the output bus.
Additionally, the AD8174 can be shut down (SD) when not in
use to minimize power consumption (I_S = 1.5 mA). These
products will be offered in 8-lead and 14-lead PDIP and SOIC
packages.
V_IN = 50mV rms
G = +2
R_F = 499Ω (AD8170R)
R_F = 549Ω (AD8174R)
0.1 R_L = 100Ω
0
–0.1
–0.2
–0.3
–0.4
–0.5
1M
10M
100M
FREQUENCY – Hz
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
1G
Figure 1. Small Signal Frequency Response
REV. 0
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use, nor for any infringements of patents or other rights of third parties
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© Analog Devices, Inc., 1996