LT1227 Linear Technology Corporation, LT1227 Datasheet
LT1227
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LT1227 Summary of contents
Page 1
... The low differential gain and phase, wide bandwidth, and 30mA output drive current make the LT1227 well suited to drive cables in video systems. A shutdown feature switches the device into a high imped- ance, low current mode, allowing multiple devices to be connected in parallel and selected ...
Page 2
... Supply Voltage ..................................................... 18V Input Current ...................................................... 15mA Output Short Circuit Duration (Note 2) ........ Continuous Operating Temperature Range LT1227C .................................................. LT1227M (OBSOLETE) .................... – 125 C Storage Temperature Range ................. – 150 C Junction Temperature Plastic Package ................................................ 150 C Ceramic Package (OBSOLETE) ........................ 175 C Lead Temperature (Soldering, 10 sec.)................ 300 C ELECTRICAL C ...
Page 3
... Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: A heat sink may be required depending on the power supply voltage. Note 3: The supply current of the LT1227 has a negative temperature coefficient. For more information, see Typical Performance Characteristics curves. The denotes the specifications which apply over the full operating = 25 C ...
Page 4
... Bandwidth vs Supply Voltage, Gain = 10, R 180 PEAKING 0.5dB 160 PEAKING 5dB 140 120 100 SUPPLY VOLTAGE ( V) LT1227 • TPC05 –3dB Bandwidth vs Supply Voltage, Gain = 100 500 SUPPLY VOLTAGE ( V) LT1227 • TPC08 = LT1227 • TPC03 = 500 750 LT1227 • TPC06 = LT1227 • TPC09 ...
Page 5
... V –50 – 100 TEMPERATURE ( C) LT1227 • TPC14 Power Supply Rejection vs Frequency 15V 100 POSITIVE NEGATIVE 10k 100k 1M 10M FREQUENCY (Hz) LT1227 • TPC17 LT1227 Maximum Undistorted Output vs Frequency 100k 1 10 FREQUENCY (MHz) Output Short-Circuit Current vs Junction Temperature 125 –50 75 100 –25 0 ...
Page 6
... V = 15V 0. 0.30 100k 1M 10M FREQUENCY (Hz) LT1227 • TPC23 3rd Order Intercept vs Frequency 15V 100 680 FREQUENCY (MHz) LT1227 • TPC26 Supply Current vs Supply Voltage – 125 C 7 175 SUPPLY VOLTAGE ( V) Differential Gain vs Frequency 0 0. 0.03 1.0V 2.0V 0. 15V 0. ...
Page 7
... Feedback Resistor Selection The small-signal bandwidth of the LT1227 is set by the external feedback resistors and the internal junction ca- pacitors result, the bandwidth is a function of the supply voltage, the value of the feedback resistor, the closed-loop gain and load resistor ...
Page 8
... For gains less than ten in the noninverting mode, the overall slew rate is limited by the input stage. The input stage slew rate of the LT1227 is approximately 125V/ s and is set by internal currents and capacitances. The output slew rate is set by the value of the feedback resistors and the internal capacitances ...
Page 9
... Because the pin is referenced to the positive supply, the logic used should have a breakdown voltage of greater than the positive supply voltage. No other circuitry is AI03 necessary as an internal JFET limits the Pin 8 current to about 100 A. When Pin 8 is open, the LT1227 operates = –2 V normally. Differential Input Signal Swing The differential input swing is limited to about ESD protection device connected between the inputs ...
Page 10
... IN1 V IN2 at P-P INPUT SELECT –40 –50 –60 –70 –80 –90 TA03 MUX Amplifier 15V + LT1227 S/D V OUT – –15V 1.5k 5V 74C906 15V + LT1227 S/D – –15V 1. 74HC04 74C906 1227 TA04 MUX Input Crosstalk vs Frequency 1 10 100 FREQUENCY (MHz) LT1227 TA05 ...
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... Plastic Small Outline (Narrow .150 Inch) (Reference LTC DWG # 05-08-1610) 0.053 – 0.069 (1.346 – 1.752) 0.004 – 0.010 (0.101 – 0.254) 0 – 8 TYP 0.014 – 0.019 0.050 (1.270) (0.355 – 0.483) TYP BSC LT1227 0.405 (10.287) 0.005 MAX (0.127) MIN 0.025 0.220 – 0.310 (0.635) (5.588 – ...
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... TA11 1227 TA07 COMMENTS Miniature Packages: SOT-23, MSOP-8, SSOP-16 www.linear.com 3.58MHz Oscillator 15V 1N4148 100k 2N3904 100pF 75pF 3.579545MHz 68pF 150k 1k V OUT 15V – LT1227 + 1227 TA09 –15V Optional Offset Nulling Circuit R NULL + V 10k LT1227 2 – 47k FOR V ...