250 MHz, 10 ns Switching a Multiplexers w/Amplifier AD8170/AD8174 FEATURES FUNCTIONAL BLOCK DIAGRAM Fully Buffered Inputs and Outputs Fast Channel Switching: 10 ns AD8170 SELECT 1 8 V Internal Current Feedback Output Amplifier OUT High Output Drive: 50 mA GND 2 7 V IN Flexible Gain Setting via External Resistor(s) 3 6 +V V S S High Speed IN1 IN0 4 +1 +1 5 250 MHz Bandwidth, G = +2 1000 V/ms Slew Rate Fast Settling Time of 15 ns to 0.1% AD8174 Low Power: < 10 mA 1 +1 14 +V IN0 S Excellent Video Specifications (R = 150 V, G = +2) L GND 2 13 V OUT Gain Flatness of 0.1 dB Beyond 80 MHz IN1 3 +1 12 V IN 0.02% Differential Gain Error 2 GND 4 11 SD 0.058 Differential Phase Error Low Crosstalk of 78 dB 5 MHz IN2 +1 10 ENABLE 5 High Disable Isolation of 88 dB 5 MHz V 6 9 A1 S High Shutdown Isolation of 92 dB 5 MHz IN3 7 8 A0 +1 2 Low Cost Fast Output Disable Feature for Connecting Multiple Devices (AD8174 Only) Shutdown Feature Reduces Power to 1.5 mA (AD8174 Only) APPLICATIONS The AD8174 offers a high speed disable feature allowing the Pixel Switching for Picture-In-Picture output to be put into a high impedance state for cascading LCD and Plasma Displays stages so that the off channels do not load the output bus. Video Routers Additionally, the AD8174 can be shut down (SD) when not in use to minimize power consumption (I = 1.5 mA). These S PRODUCT DESCRIPTION products will be offered in 8-lead and 14-lead PDIP and SOIC The AD8170(2:1) and AD8174(4:1) are very high speed packages. 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 0 mA of output current. They offer 3 dB signal bandwidth of V = 50mV rms IN 1 G = +2 250 MHz and slew rate of greater than 1000 V/s. Additionally, R = 499 (AD8170R) F 2 the AD8170 and AD8174 have excellent video specifications R = 549 (AD8174R) F 3 0.1 with low differential gain and differential phase error of 0.02% R = 100 L and 0.05 and 0.1 dB flatness out to 80 MHz. With a low 78 4 0 dB of crosstalk and better than 88 dB isolation, these devices are 0.1 5 useful in many high speed applications. These are low power 6 0.2 devices consuming only 9.7 mA from a 5 V supply. 0.3 7 0.4 8 0.5 9 1M 10M 100M 1G FREQUENCY Hz Figure 1. Small Signal Frequency Response REV. 0 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. use, nor for any infringements of patents or other rights of third parties Tel: 617/329-4700 World Wide Web Site: ( T = +258C, V = 65 V, R = 150 V, G = +2, R = 499 V A S L F AD8170/AD8174SPECIFICATIONS (AD8170R), R = 549 V (AD8174R) unless otherwise noted) F AD8170A/AD8174A Parameter Conditions Min Typ Max Units SWITCHING CHARACTERISTICS 1 Channel-to-Channel Switching Time 50% Logic to 10% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 7.5 ns 50% Logic to 90% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 9.1 ns 50% Logic to 99.9% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 25 ns 2 ENABLE to Channel ON Time (AD8174R) 50% Logic to 90% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 17 ns 2 ENABLE to Channel OFF Time (AD8174R) 50% Logic to 90% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 120 ns 3 Shutdown to Channel ON Time (AD8174R) 50% Logic to 90% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 20 ns 3 Shutdown to Channel OFF Time (AD8174R) 50% Logic to 90% Output Settling IN0, IN2 = +0.5 V IN1, IN3 = 0.5 V 115 ns 4 Channel Switching Transient (Glitch) All Inputs Grounded 138 /104 mV p-p DIGITAL INPUTS Logic 1 Voltage SELECT, A0, A1, ENABLE, SD Inputs, T T 2.0 V MIN MAX ENABLE, SD Inputs, T T 0.8 V Logic 0 Voltage SELECT, A0, A1, MIN MAX Logic 1 Input Current SELECT, A0, A1 Inputs, T T 50 300 nA MIN MAX ENABLE, SD Inputs, T T 15 A MIN MAX T 35 A Logic 0 Input Current SELECT, A0, A1 Inputs, T MIN MAX ENABLE, SD Inputs, T T 30 300 nA MIN MAX DYNAMIC PERFORMANCE 5 3 dB Bandwidth (Small Signal) V = 50 mV rms, R = 100 250 MHz O L 5 3 dB Bandwidth (Large Signal) V = 1 V rms, R = 100 100 MHz O L 5 V = 50 mV rms, R = 499 (AD8170R), R = 100 0.1 dB Bandwidth O F L V = 50 mV rms, R = 549 (AD8174R), R = 100 85 MHz O F L Rise and Fall Time (10% to 90%) 2 V Step 1.6 ns Slew Rate 2 V Step 1000 V/s Settling Time to 0.1% 2 V Step 15 ns DISTORTION/NOISE PERFORMANCE Differential Gain = 3.58 MHz 0.02 % Differential Phase = 3.58 MHz 0.05 Degrees 6 All Hostile Crosstalk AD8170R = 5 MHz, R = 100 80 dB L = 100 65 dB = 30 MHz, R L 6 All Hostile Crosstalk AD8174R = 5 MHz, R = 100 78 dB L = 30 MHz, R = 100 63 dB L 7 AD8174R = 5 MHz, R = 100 88 dB Disable Isolation L = 30 MHz, R = 100 72 dB L 8 Shutdown Isolation AD8174R = 5 MHz, R = 100 92 dB L = 100 77 dB = 30 MHz, R L Input Voltage Noise = 10 kHz to 30 MHz 10 nV/Hz +Input Current Noise = 10 kHz to 30 MHz 1.6 pA/Hz Hz Input Current Noise = 10 kHz to 30 MHz 8.5 pA/ Total Harmonic Distortion = 10 MHz, V = 2 V p-p, R = 150 60 dBc C O L = 10 MHz, V = 2 V p-p, R = 1 k 72 dBc C O L DC/TRANSFER CHARACTERISTICS Transresistance 400 600 k Open-Loop Voltage Gain 2000 6000 V/V 9 Gain Accuracy G = +1, R = 1 k 0.4 % F Gain Matching Channel-to-Channel 0.05 % Input Offset Voltage 59 mV T to T 12 mV MIN MAX Input Offset Voltage Matching Channel-to-Channel 1.5 5 mV Input Offset Voltage Drift 11 V/C Input Bias Current (+) Switch Input 7 15 A to T 15 A T MIN MAX () Buffer Input 3 10 A T to T 14 A MIN MAX Input Bias Current Drift (+) Switch and () Buffer Input 20 nA/C REV. 0 2