Datasheet LT1204 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 4-Input Video Multiplexer with 75MHz Current Feedback Amplifier |
| Pages / Page | 20 / 1 — FEATU. DESCRIPTIO. 0.1dB Gain Flatness > 30MHz. Channel Separation at … |
| File Format / Size | PDF / 272 Kb |
| Document Language | English |
FEATU. DESCRIPTIO. 0.1dB Gain Flatness > 30MHz. Channel Separation at 10MHz: 90dB. 40mV Switching Transient, Input Referred
Model Line for this Datasheet
Text Version of Document
LT1204 4-Input Video Multiplexer with 75MHz Current Feedback Amplifier
U FEATU S RE DESCRIPTIO
■
0.1dB Gain Flatness > 30MHz
The LT®1204 is a 4-input video multiplexer designed to ■
Channel Separation at 10MHz: 90dB
drive 75Ω cables and easily expand into larger routing ■
40mV Switching Transient, Input Referred
systems. Wide bandwidth, high slew rate, and low differ- ■ – 3dB Bandwidth, AV = 2, RL = 150Ω: 75MHz ential gain and phase make the LT1204 ideal for broadcast ■ Channel-to-Channel Switching Time: 120ns quality signal routing. Channel separation and disable ■ Easy to Expand for More Inputs isolation are greater than 90dB up to 10MHz. The channel- ■ Large Input Range: ± 6V to-channel output switching transient is only 40mVP-P, ■ 0.04% Differential Gain, RL = 150Ω with a 50ns duration, making the transition imperceptible ■ 0.06° Differential Phase, RL = 150Ω on high quality monitors. ■ High Slew Rate: 1000V/µs A unique feature of the LT1204 is its ability to expand into ■ Output Swing, RL = 400Ω: ±13V larger routing matrices. This is accomplished by a patent ■ Wide Supply Range: ±5V to ±15V pending circuit that bootstraps the feedback resistors in
O U
the disable condition, raising the true output impedance of
APPLICATI S
the circuit. The effect of this feature is to eliminate cable misterminations in large systems. ■ Broadcast Quality Video Multiplexing ■ Large Matrix Routing The large input and output signal levels supported by the ■ Medical Imaging LT1204 when operated on ±15V supplies make it ideal for ■ Large Amplitude Signal Multiplexing general purpose analog signal selection and multiplexing. ■ Programmable Gain Amplifiers A shutdown feature reduces the supply current to 1.5mA. , LTC and LT are registered trademarks of Linear Technology Corporation.
O U TYPICAL APPLICATI All Hostile Crosstalk
V 1 IN0 V 16 IN0 +1 V+ 15V
Surface Mount PCB Measurements
75Ω + 2 V 75Ω O 15 GND CFA V –20 OUT VS = ±15V V – V 3 IN1 14 IN 0 = GND VIN1 +1 V– –15V RF –40 VIN 1,2,3 = 0dBm 1k R R G L = 100Ω 75Ω 4 FB 13 1k GND –60 V 5 IN2 V S/D 12 IN2 +1 –80 75Ω ENABLE 11 6 GND LOGIC A1 10 ALL HOSTILE CROSSTALK (dB) –100 V 7 IN3 VIN3 +1 A0 9 75Ω –120 8 1 10 100 REF LT1204 1204 TA01 FREQUENCY (MHz) 1204 TA02 –15V 6.8k 8.2k 1
U FEATU S RE DESCRIPTIO
■
0.1dB Gain Flatness > 30MHz
The LT®1204 is a 4-input video multiplexer designed to ■
Channel Separation at 10MHz: 90dB
drive 75Ω cables and easily expand into larger routing ■
40mV Switching Transient, Input Referred
systems. Wide bandwidth, high slew rate, and low differ- ■ – 3dB Bandwidth, AV = 2, RL = 150Ω: 75MHz ential gain and phase make the LT1204 ideal for broadcast ■ Channel-to-Channel Switching Time: 120ns quality signal routing. Channel separation and disable ■ Easy to Expand for More Inputs isolation are greater than 90dB up to 10MHz. The channel- ■ Large Input Range: ± 6V to-channel output switching transient is only 40mVP-P, ■ 0.04% Differential Gain, RL = 150Ω with a 50ns duration, making the transition imperceptible ■ 0.06° Differential Phase, RL = 150Ω on high quality monitors. ■ High Slew Rate: 1000V/µs A unique feature of the LT1204 is its ability to expand into ■ Output Swing, RL = 400Ω: ±13V larger routing matrices. This is accomplished by a patent ■ Wide Supply Range: ±5V to ±15V pending circuit that bootstraps the feedback resistors in
O U
the disable condition, raising the true output impedance of
APPLICATI S
the circuit. The effect of this feature is to eliminate cable misterminations in large systems. ■ Broadcast Quality Video Multiplexing ■ Large Matrix Routing The large input and output signal levels supported by the ■ Medical Imaging LT1204 when operated on ±15V supplies make it ideal for ■ Large Amplitude Signal Multiplexing general purpose analog signal selection and multiplexing. ■ Programmable Gain Amplifiers A shutdown feature reduces the supply current to 1.5mA. , LTC and LT are registered trademarks of Linear Technology Corporation.
O U TYPICAL APPLICATI All Hostile Crosstalk
V 1 IN0 V 16 IN0 +1 V+ 15V
Surface Mount PCB Measurements
75Ω + 2 V 75Ω O 15 GND CFA V –20 OUT VS = ±15V V – V 3 IN1 14 IN 0 = GND VIN1 +1 V– –15V RF –40 VIN 1,2,3 = 0dBm 1k R R G L = 100Ω 75Ω 4 FB 13 1k GND –60 V 5 IN2 V S/D 12 IN2 +1 –80 75Ω ENABLE 11 6 GND LOGIC A1 10 ALL HOSTILE CROSSTALK (dB) –100 V 7 IN3 VIN3 +1 A0 9 75Ω –120 8 1 10 100 REF LT1204 1204 TA01 FREQUENCY (MHz) 1204 TA02 –15V 6.8k 8.2k 1
