Datasheet LT1251, LT1256 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 40MHz Video Fader and DC Gain Controlled Amplifier |
| Pages / Page | 24 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. LT1251. LT1256. Spot Input Noise … |
| File Format / Size | PDF / 396 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. LT1251. LT1256. Spot Input Noise Voltage and. Gain vs Control Voltage. Current vs Frequency
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Text Version of Document
LT1251/LT1256
W U TYPICAL PERFORMANCE CHARACTERISTICS LT1251 LT1256 Spot Input Noise Voltage and Gain vs Control Voltage Gain vs Control Voltage Current vs Frequency
1.0 1.0 100 0.8 0.8 √Hz) –in IN2 IN2 V) 0.6 V) 0.6 VFS = 2.5V VFS = 2.5V √Hz OR pA/ 10 GAIN (V/ 0.4 GAIN (V/ 0.4 IN1 IN1 en 0.2 0.2 SPOT NOISE (nV/ +in 0 0 1 0 0.5 1.0 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 2.5 10 100 1k 10k CONTROL VOLTAGE (V) CONTROL VOLTAGE (V) FREQUENCY (Hz) 1251/56 G01 1251/56 G02 1251/56 G06
LT1251/LT1256 LT1251/LT1256 Undistorted Output Voltage Control Path Bandwidth Control Path Bandwidth vs Frequency
10 10 8 VOLTAGE DRIVE V VOLTAGE DRIVE R 8 C C A 8 V = 10 VS = ±5V VC = GND 7 6 6 VS = ±5V ) 4 P-P 6 4 AV = 1 2 2 5 0 0 PIN 4 NOT IN SOCKET 4 –2 –2 VOLTAGE GAIN (dB) –4 VOLTAGE GAIN (dB) –4 3 OUTPUT VOLTAGE (V VS = ±5V –6 R –6 L = 1k 2 RF = 1.5k –8 –8 VC = VFS = 2.5V –10 1 –10 10k 100k 1M 10M 100M 10k 100k 1M 10M 100M 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 1251/56 G04 1251/56 G05 1251/56 G07
2nd and 3rd Harmonic Distortion THD Plus Noise vs Frequency vs Frequency 3rd Order Intercept vs Frequency
10 –20 50 V V = ±5V V = ±15V S = ±5V, VIN = 1VRMS S CC S CC CC A A A V = 1, RF = 1.5k, VFS = 2.5V V = 1 45 V = 1 R R –30 F = 1.5k F = 1.5k 1 RL = 1k 40 RL = 100Ω VC = 10% CC V V O = 2VP-P C = VFS = 2.5V VC = VFS = 2.5V 35 –40 0.1 30 –50 25 THD + NOISE (%) VC = 50% DISTORTION (dBc) CC 0.01 2ND 3RD 20 –60 3RD ORDER INTERCEPT (dBm) VC = 100% 15 CC 0.001 –70 10 10 100 1k 10k 100k 1 10 100 0 5 10 15 20 25 30 FREQUENCY (Hz) FREQUENCY (MHz) FREQUENCY (MHz) 1251/56 G08 1251/56 G09 1251/56 G10 5
W U TYPICAL PERFORMANCE CHARACTERISTICS LT1251 LT1256 Spot Input Noise Voltage and Gain vs Control Voltage Gain vs Control Voltage Current vs Frequency
1.0 1.0 100 0.8 0.8 √Hz) –in IN2 IN2 V) 0.6 V) 0.6 VFS = 2.5V VFS = 2.5V √Hz OR pA/ 10 GAIN (V/ 0.4 GAIN (V/ 0.4 IN1 IN1 en 0.2 0.2 SPOT NOISE (nV/ +in 0 0 1 0 0.5 1.0 1.5 2.0 2.5 0 0.5 1.0 1.5 2.0 2.5 10 100 1k 10k CONTROL VOLTAGE (V) CONTROL VOLTAGE (V) FREQUENCY (Hz) 1251/56 G01 1251/56 G02 1251/56 G06
LT1251/LT1256 LT1251/LT1256 Undistorted Output Voltage Control Path Bandwidth Control Path Bandwidth vs Frequency
10 10 8 VOLTAGE DRIVE V VOLTAGE DRIVE R 8 C C A 8 V = 10 VS = ±5V VC = GND 7 6 6 VS = ±5V ) 4 P-P 6 4 AV = 1 2 2 5 0 0 PIN 4 NOT IN SOCKET 4 –2 –2 VOLTAGE GAIN (dB) –4 VOLTAGE GAIN (dB) –4 3 OUTPUT VOLTAGE (V VS = ±5V –6 R –6 L = 1k 2 RF = 1.5k –8 –8 VC = VFS = 2.5V –10 1 –10 10k 100k 1M 10M 100M 10k 100k 1M 10M 100M 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) FREQUENCY (Hz) 1251/56 G04 1251/56 G05 1251/56 G07
2nd and 3rd Harmonic Distortion THD Plus Noise vs Frequency vs Frequency 3rd Order Intercept vs Frequency
10 –20 50 V V = ±5V V = ±15V S = ±5V, VIN = 1VRMS S CC S CC CC A A A V = 1, RF = 1.5k, VFS = 2.5V V = 1 45 V = 1 R R –30 F = 1.5k F = 1.5k 1 RL = 1k 40 RL = 100Ω VC = 10% CC V V O = 2VP-P C = VFS = 2.5V VC = VFS = 2.5V 35 –40 0.1 30 –50 25 THD + NOISE (%) VC = 50% DISTORTION (dBc) CC 0.01 2ND 3RD 20 –60 3RD ORDER INTERCEPT (dBm) VC = 100% 15 CC 0.001 –70 10 10 100 1k 10k 100k 1 10 100 0 5 10 15 20 25 30 FREQUENCY (Hz) FREQUENCY (MHz) FREQUENCY (MHz) 1251/56 G08 1251/56 G09 1251/56 G10 5
