High Output Current a Differential Driver AD815 FUNCTIONAL BLOCK DIAGRAM FEATURES Flexible Configuration Differential Input and Output Driver NC 1 24 NC or Two Single-Ended Drivers NC 2 23 NC Industrial Temperature Range NC 3 22 NC High Output Power NC 4 21 NC Thermally Enhanced SOIC 5 20 AD815 THERMAL 400 mA Minimum Output Drive/Amp, R = 10 THERMAL 6 19 L TOP VIEW HEAT TABS HEAT TABS Low Distortion (Not to Scale) 7 18 +V * +V * S S 66 dB 1 MHz THD, R = 200 , V = 40 V p-p 8 17 L OUT 0.05% and 0.45 Differential Gain and Phase, R = 25 +IN1 9 16 L +IN2 (6 Back-Terminated Video Loads) IN1 10 15 IN2 High Speed OUT1 11 14 OUT2 120 MHz Bandwidth (3 dB) V 12 13 +V S S 900 V/ s Differential Slew Rate NC = NO CONNECT 70 ns Settling Time to 0.1% *HEAT TABS ARE CONNECTED TO THE POSITIVE SUPPLY. Thermal Shutdown APPLICATIONS ADSL, HDSL, and VDSL Line Interface Driver Coil or Transformer Driver combined with the wide bandwidth and high current drive make CRT Convergence and Astigmatism Adjustment the differential driver ideal for communication applications such Video Distribution Amp as subscriber line interfaces for ADSL, HDSL and VDSL. Twisted Pair Cable Driver The AD815 differential slew rate of 900 V/s and high load drive are suitable for fast dynamic control of coils or transformers, GENERAL DESCRIPTION and the video performance of 0.05% and 0.45 differential gain The AD815 consists of two high speed amplifiers capable of and phase into a load of 25 enable up to 12 back-terminated supplying a minimum of 500 mA. They are typically configured loads to be driven. as a differential driver enabling an output signal of 40 V p-p on The 24-lead SOIC (RB) is capable of driving 26 dBm for full 15 V supplies. This can be increased further with the use of a rate ADSL with proper heat sinking. coupling transformer with a greater than 1:1 turns ratio. The low harmonic distortion of 66 dB 1 MHz into 200 +15V 1/2 100 40 AD815 R = 15 1 V = 15V S AMP1 G = +10 50 V = 40V p-p OUT 499 60 R V = V = L IN D V = G = +10 OUT 110 120 4Vp-p 40Vp-p 40Vp-p 70 499 R = 50 L R = 15 80 2 (DIFFERENTIAL) AMP2 100 1:2 1/2 R = 200 L TRANSFORMER 90 AD815 (DIFFERENTIAL) 15V 100 Figure 2. Subscriber Line Differential Driver 110 100 1k 10k 100k 1M 10M FREQUENCY Hz Figure 1. Total Harmonic Distortion vs. Frequency REV. D 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. may result from its use. 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TOTAL HARMONIC DISTORTION dBcAD815SPECIFICATIONS ( T = +25 C, V = 15 V dc, R = 1 k and R = 100 unless otherwise noted) A S FB LOAD AD815A Model Conditions V Min Typ Max Units S DYNAMIC PERFORMANCE Small Signal Bandwidth (3 dB) G = +1 15 100 120 MHz G = +1 590 110 MHz Bandwidth (0.1 dB) G = +2 15 40 MHz G = +2 510 MHz Differential Slew Rate V = 20 V p-p, G = +2 15 800 900 V/s OUT Settling Time to 0.1% 10 V Step, G = +2 15 70 ns NOISE/HARMONIC PERFORMANCE Total Harmonic Distortion f = 1 MHz, R = 200 , V = 40 V p-p 15 66 dBc LOAD OUT Input Voltage Noise f = 10 kHz, G = +2 (Single Ended) 5, 15 1.85 nV/Hz Input Current Noise (+I)f = 10 kHz, G = +2 5, 15 1.8 pA/Hz IN Input Current Noise (I)f = 10 kHz, G = +2 5, 15 19 pA/Hz IN Differential Gain Error NTSC, G = +2, R = 25 15 0.05 % LOAD Differential Phase Error NTSC, G = +2, R = 25 15 0.45 Degrees LOAD DC PERFORMANCE Input Offset Voltage 558mV 15 10 15 mV T T 30 mV MIN MAX Input Offset Voltage Drift 20 V/C Differential Offset Voltage 5 0.5 2 mV 15 0.5 4 mV T T 5mV MIN MAX Differential Offset Voltage Drift 10 V/C Input Bias Current 5, 15 10 90 A T T 150 A MIN MAX +Input Bias Current 5, 15 2 5 A T T 5 A MIN MAX Differential Input Bias Current 5, 15 10 75 A T T 100 A MIN MAX Open-Loop Transresistance 5, 15 1.0 5.0 M T T 0.5 M MIN MAX INPUT CHARACTERISTICS Differential Input Resistance +Input 15 7 M Input 15 Differential Input Capacitance 15 1.4 pF Input Common-Mode Voltage Range 15 13.5 V 5 3.5 V Common-Mode Rejection Ratio T T 5, 15 57 65 dB MIN MAX Differential Common-Mode Rejection Ratio T T 5, 15 80 100 dB MIN MAX OUTPUT CHARACTERISTICS Voltage Swing Single Ended, R = 25 15 11.0 11.7 V LOAD 5 1.1 1.8 V Differential, R = 50 15 21 23 V LOAD T T 15 22.5 24.5 V MIN MAX 1 Output Current RB-24 R = 10 15 400 500 mA LOAD Short Circuit Current 15 1.0 A Output Resistance 15 13 MATCHING CHARACTERISTICS Crosstalk f = 1 MHz 15 65 dB POWER SUPPLY 2 Operating Range T T 18 V MIN MAX Quiescent Current 52330mA 15 30 40 mA T T 540mA MIN MAX 15 55 mA Power Supply Rejection Ratio T T 5, 15 55 66 dB MIN MAX NOTES 1 Output current is limited in the 24-lead SOIC package to the maximum power dissipation. See absolute maximum ratings and derating curves. 2 Observe derating curves for maximum junction temperature. Specifications subject to change without notice. 2 REV. D