160 MHz Rail-to-Rail
Amplifier with Disable
AD8041
FEATURES
Fully Specified for +3 V, +5 V, and ؎5 V Supplies
Output Swings Rail to Rail
Input Voltage Range Extends 200 mV Below Ground
No Phase Reversal with Inputs 1 V Beyond Supplies
Disable/Power-Down Capability
Low Power of 5.2 mA (26 mW on 5 V)
High Speed and Fast Settling on 5 V:
160 MHz –3 dB Bandwidth (G = +1)
160 V/s Slew Rate
30 ns Settling Time to 0.1%
Good Video Specifications (RL = 150 ⍀, G = +2)
Gain Flatness of 0.1 dB to 30 MHz
0.03% Differential Gain Error
0.03؇ Differential Phase Error
Low Distortion
–69 dBc Worst Harmonic @ 10 MHz
Outstanding Load Drive Capability
Drives 50 mA 0.5 V from Supply Rails
Cap Load Drive of 45 pF
APPLICATIONS
Power Sensitive High Speed Systems
Video Switchers
Distribution Amplifiers
A/D Drivers
Professional Cameras
CCD Imaging Systems
Ultrasound Equipment (Multichannel)
Single-Supply Multiplexer
PRODUCT DESCRIPTION
The AD8041 is a low power voltage feedback, high speed amplifier designed to operate on +3 V, +5 V, or ± 5 V supplies. It has
true single-supply capability with an input voltage range extending
200 mV below the negative rail and within 1 V of the positive rail.
CONNECTION DIAGRAM
8-Lead PDIP, CERDIP and SOIC
8 DISABLE
NC 1
7 ؉VS
–INPUT 2
؉INPUT 3
–VS 4
6 OUTPUT
AD8041
(Top View)
5 NC
NC = NO CONNECT
The output voltage swing extends to within 50 mV of each rail,
providing the maximum output dynamic range. Additionally, it
features gain flatness of 0.1 dB to 30 MHz while offering differential gain and phase error of 0.03% and 0.03° on a single 5 V
supply. This makes the AD8041 ideal for professional video
electronics such as cameras, video switchers, or any high speed
portable equipment. The AD8041’s low distortion and fast settling
make it ideal for buffering high speed A-to-D converters.
The AD8041 has a high speed disable feature useful for multiplexing or for reducing power consumption (1.5 mA). The
disable logic interface is compatible with CMOS or opencollector logic. The AD8041 offers a low power supply current
of 5.8 mA maximum and can run on a single 3 V power supply.
These features are ideally suited for portable and batterypowered applications where size and power are critical.
The wide bandwidth of 160 MHz along with 160 V/µs of slew
rate on a single 5 V supply make the AD8041 useful in many
general-purpose high speed applications where dual power
supplies of up to ± 6 V and single supplies from 3 V to 12 V are
needed. The AD8041 is available in 8-lead PDIP and SOIC
over the industrial temperature range of –40°C to +85°C.
2
VS = 5V
G = +2
RF = 400⍀
1
NORMALIZED GAIN (dB)
0
5V
2.5V
–1
–2
–3
–4
–5
–6
–7
0V
1V
200ns
–8
0
Figure 1. Output Swing: G = –1, VS = 5 V
20
40
60
FREQUENCY (MHz)
80
100
Figure 2. Frequency Response: G = +2, VS = 5 V
REV. B
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