LT1223 Linear Technology, LT1223 Datasheet
LT1223
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LT1223 Summary of contents
Page 1
... OUT D ESCRIPTIO The LT1223 is a 100MHz current feedback amplifier with very good DC characteristics. The LT1223’s high slew rate, 1000V/ s, wide supply range, 15V, and large output drive, 50mA, make it ideal for driving analog signals over double- terminated cables. The current feedback amplifier has high gain bandwidth at high gains, unlike conventional op amps ...
Page 2
... Supply Voltage ...................................................... 18V Differential Input Voltage ......................................... 5V Input Voltage ............................ Equal to Supply Voltage Output Short Circuit Duration (Note 1) ......... Continuous Operating Temperature Range LT1223M ........................................ – 125 C LT1223C ................................................ Storage Temperature Range ................. – 150 C Junction Temperature Plastic Package ........... 150 C Junction Temperature Ceramic Package ........ 175 C Lead Temperature (Soldering, 10 sec ...
Page 3
... 100 nA 100 nA/V 60 500 nA 1 LT1223M MIN TYP MAX UNITS 100 nA 200 nA/V 60 500 nA 1 ...
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... Load Resistor 15V S 15 125°C 10 25°C, –55° –5 –10 25°C, –55°C –15 125°C –20 100 1000 LOAD RESISTOR ( ) LT1223 • TPC09 Output Short Circuit-Current vs Temperature 100 –50 – CASE TEMPERATURE (° ...
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... LOAD RESISTOR ( ) Output Impedance vs Frequency 100 V = 15V 0.1 0.01 100M 10k 100k 1M FREQUENCY (Hz) LT1223 V = 15V 100 L 0dB PEAKING LT1223 • TPC13 125°C –55°C 10000 LT1223 • TPC16 = 1k 10M 100M LT1223 • TPC19 5 ...
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... Thevenin equivalent resistance at the inverting input and the internal compensation capacitor. By keeping R Thevenin resistance changes by the same amount as the change in gain result, the net closed-loop bandwidth of the LT1223 remains the same for various closed-loop gains. 2nd and 3rd Harmonic Distortion vs Frequency –20 ...
Page 7
... PPLICATI S I FOR ATIO The curve on the first page shows the LT1223 voltage gain versus frequency while driving 100 , for five gain settings from 1 to 100. The feedback resistor is a constant 1k and the gain resistor is varied from infinity Shown for comparison is a plot of the fixed 100MHz gain bandwidth limitation that a voltage feedback amplifier would have ...
Page 8
... Inverting amplifiers do not slew the input and are therefore limited only by the output stage. High gain, noninverting amplifi- ers are similar. The input stage slew rate of the LT1223 is about 350V/ s before it becomes nonlinear and is en- hanced by the normally reverse-biased emitters on the input transistors ...
Page 9
... Just as the bandwidth of the LT1223 is fairly constant for various closed-loop gains, the settling time remains constant as well. Adjustable Gain Amplifier To make a variable gain amplifier with the LT1223, vary the value The implementation controlled resistor, a FET, or any other low capacitance variable resistor ...
Page 10
... OUT Video Instrumentation Amplifier This instrumentation amplifier uses two LT1223s to in- crease the input resistance to well over 1M. This makes an excellent “loop through” or cable sensing amplifier if the inverting input (A1) senses the shield and the non-invert- ing input (A2) senses the center conductor. Since this ...
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... Output Current Video Amp BIAS 75 IN OUT LT1010 V – V – BIAS 2 BIAS LT1223 LT1223 • TA10 LT1223 • TA01 11 ...
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... LT1223 PACKAGE DESCRIPTIO 0.290 – 0.320 (7.366 – 8.128) 0.008 – 0.018 0° – 15° (0.203 – 0.460) 0.038 – 0.068 0.385 ± 0.025 (0.965 – 1.727) (9.779 ± 0.635) 0.014 – 0.026 (0.360 – 0.660) 0.300 – 0.320 (7.620 – 8.128) ...