Datasheet AD8012 (Analog Devices)

Dual 350 MHz Low Power Amplifier AD8012* FEATURES FUNCTIONAL BLOCK DIAGRAM Low Power 1.7 mA/Amplifier Supply Current Fully Specified for 5 V and +5 V Supplies OUT1 1 8 +VS High Output Current, 125 mA –IN1 2 7 OUT2 High Speed +IN1 3 6 –IN2 350 MHz, –3 dB Bandwidth (G = +1) 150 MHz, –3 dB Bandwidth (G = +2) –V 4 5 +IN2 S AD8012 2,250 V/ s Slew Rate 20 ns Settling Time to 0.1% Low Distortion –72 dBc Worst Harmonic @ 500 kHz, RL = 100 –66 dBc Worst Harmonic @ 5 MHz, RL = 1 k Good Video Specifications (RL = 1 k , G = +2) 0.02% Differential Gain Error 0.06 Differential Phase Error Gain Flatness 0.1 dB to 40 MHz 60 ns Overdrive Recovery Low Offset Voltage, 1.5 mV –40 Low Voltage Noise, 2.5 nV/
√
Hz G = +2 V Available in 8-Lead SOIC and 8-Lead MSOP OUT = 2V p-p –50 RF = 750 APPLICATIONS XDSL, HDSL Line Drivers –60 ADC Buffers Professional Cameras THIRD CCD Imaging Systems –70 Ultrasound Equipment DISTORTION – dBc Digital Cameras –80 SECOND PRODUCT DESCRIPTION
The AD8012 is a dual, low power, current feedback amplifier
–9010 100 1k
capable of providing 350 MHz bandwidth while using only
RL –
1.7 mA per amplifier. It is intended for use in high frequency, wide dynamic range systems where low distortion and high Figure 1. Distortion vs. Load Resistance, VS = ±5 V, speed are essential and low power is critical. Frequency = 500 kHz With only 1.7 mA of supply current, the AD8012 also offers
+VS
exceptional ac specifications such as 20 ns settling time and
+
2,250 V/µs slew rate. The video specifications are 0.02% differ-
R1 AMP 1 +
ential gain and 0.06 degree differential phase, excellent for such a low power amplifier. In addition, the AD8012 has a low offset
RL = 100 LINE
of 1.5 mV.
V V IN REF OR VOUT POWER 135 IN dB
The AD8012 is well suited for any application that requires high
R2
performance with minimal power.
– – Np:Ns
The product is available in standard 8-lead SOIC or MSOP
TRANSFORMER –V
packages and operates over the industrial temperature range
S
–40°C to +85°C. Figure 2. Differential Drive Circuit for XDSL Applications *Protected under U.S. Patent Number 5,537,079. REV. B Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. No license is granted by implication or otherwise
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Document Outline FEATURES APPLICATIONS PRODUCT DESCRIPTION FUNCTIONAL BLOCK DIAGRAM SPECIFICATIONS DUAL SUPPLY SINGLE SUPPLY MAXIMUM POWER DISSIPATION Test Circuits ABSOLUTE MAXIMUM RATINGS ORDERING GUIDE Typical Performance Characteristics THEORY OF OPERATION DC GAIN CHARACTERISTICS APPLICATIONS Line Driving for HDSL Choosing the Appropriate Turns Ratio for the Transformer LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS Revision History