LT1224 Very High Speed Operational Amplifier
FEATURES
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DESCRIPTIO
Unity-Gain Stable 45MHz Gain-Bandwidth 400V/µs Slew Rate 7V/mV DC Gain: RL = 500Ω Maximum Input Offset Voltage: 2mV ±12V Minimum Output Swing into 500Ω Wide Supply Range: ±2.5V to ±15V 7mA Supply Current 90ns Settling Time to 0.1%, 10V Step Drives All Capacitive Loads
The LT1224 is a very high speed operational amplifier with excellent DC performance. The LT1224 features reduced input offset voltage and higher DC gain than devices with comparable bandwidth and slew rate. The circuit is a single gain stage with outstanding settling characteristics. The fast settling time makes the circuit an ideal choice for data acquisition systems. The output is capable of driving a 500Ω load to ±12V with ±15V supplies and a 150Ω load to ±3V on ±5V supplies. The circuit is also capable of driving large capacitive loads which makes it useful in buffer or cable driver applications. The LT1224 is a member of a family of fast, high performance amplifiers that employ Linear Technology Corporation’s advanced bipolar complementary processing.
APPLICATI
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Wideband Amplifiers Buffers Active Filters Video and RF Amplification Cable Drivers Data Acquisition Systems
TYPICAL APPLICATI
DAC Current-to-Voltage Converter
7pF
Inverter Pulse Response
5k
DAC-08 TYPE
–
LT1224 VOUT
+
0.1µF 5k 1 LSB SETTLING = 140ns
LT1224 • TA01
LT1224 • TA02
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LT1224 ABSOLUTE AXI U RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW NULL –IN +IN V– 1 2 3 4 8 7 6 5 NULL V+ OUT NC
Total Supply Voltage (V+ to V–) ............................... 36V Differential Input Voltage ......................................... ± 6V Input Voltage ............................................................ ±VS Output Short Circuit Duration (Note 1) ............ Indefinite Operating Temperature Range LT1224C ................................................ 0°C to 70°C Maximum Junction Temperature Plastic Package .............................................. 150°C Storage Temperature Range ................. – 65°C to 150°C Lead Temperature (Soldering, 10 sec.)................. 300°C
ORDER PART NUMBER LT1224CN8 LT1224CS8 S8 PART MARKING 1224
N8 PACKAGE 8-LEAD PLASTIC DIP
S8 PACKAGE 8-LEAD PLASTIC SOIC
LT1224 • POI01
TJMAX = 150°C, θJA = 100°C/W (N8) TJMAX = 150°C, θJA = 150°C/W (S8)
ELECTRICAL CHARACTERISTICS
SYMBOL VOS IOS IB en in RIN CIN PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Input Noise Voltage Input Noise Current Input Resistance Input Capacitance Input Voltage Range + Input Voltage Range – CMRR PSRR AVOL VOUT IOUT SR GBW tr, tf Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Swing Output Current Slew Rate Full Power Bandwidth Gain-Bandwidth Rise Time, Fall Time Overshoot Propagation Delay ts Settling Time Differential Gain Differential Phase RO IS Output Resistance Supply Current
VS = ±15V, TA = 25°C, RL = 1k, VCM = 0V unless otherwise noted.
MIN TYP 0.5 100 4 MAX 2.0 400 8 UNITS mV nA µA nV/√Hz pA/√Hz MΩ kΩ pF V – 12 V dB dB V/mV V mA V/µs MHz MHz ns % ns ns % Deg Ω 9 mA
CONDITIONS (Note 2)
f = 10kHz f = 10kHz VCM = ±12V Differential 24
22 1.5 40 250 2 12 14 – 13 100 84 7 ± 13.3 40 400 6.4 45 5 30 5 90 1 2.4 2.5 7
VCM = ±12V VS = ± 5V to ±15V VOUT = ±10V, RL = 500Ω RL = 500Ω VOUT = ±12V AVCL = – 2, (Note 3) 10V Peak, (Note 4) f = 1MHz AVCL = 1, 10% to 90%, 0.1V AVCL = 1, 0.1V 50% VIN to 50% VOUT 10V Step, 0.1% f = 3.58MHz, RL = 150Ω f = 3.58MHz, RL = 150Ω AVCL = 1, f = 1MHz
86 75 3.3 ± 12.0 24 250
2
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LT1224
ELECTRICAL CHARACTERISTICS VS = ± 5V, TA = 25°C, RL = 1k, VCM = 0V unless otherwise noted.
SYMBOL VOS IOS IB PARAMETER Input Offset Voltage Input Offset Current Input Bias Current Input Voltage Range + Input Voltage Range – CMRR AVOL VOUT IOUT SR GBW tr, tf Common-Mode Rejection Ratio Large-Signal Voltage Gain Output Swing Output Current Slew Rate Full Power Bandwidth Gain-Bandwidth Rise Time, Fall Time Overshoot Propagation Delay ts IS Settling Time Supply Current VCM = ±2.5V VOUT = ± 2.5V, RL = 500Ω VOUT = ± 2.5V, RL = 150Ω RL = 500Ω RL = 150Ω VOUT = ± 3V AVCL = – 2, (Note 3) 3V Peak, (Note 4) f = 1MHz AVCL = 1, 10% to 90%, 0.1V AVCL = 1, 0.1V 50% VIN to 50% VOUT –2.5V to 2.5V, 0.1% 86 2.5 ± 3.0 ± 3.0 20 2.5 CONDITIONS (Note 2) MIN TYP 1 100 4 4 –3 98 7 3 ± 3.7 ± 3.3 40 250 13.3 34 7 20 7 90 7 9 – 2.5 MAX 4 400 8 UNITS mV nA µA V V dB V/mV V/mV V V mA V/µs MHz MHz ns % ns ns mA
ELECTRICAL CHARACTERISTICS
SYMBOL VOS PARAMETER Input Offset Voltage Input VOS Drift IOS IB CMRR PSRR AVOL VOUT IOUT SR IS Input Offset Current Input Bias Current Common-Mode Rejection Ratio Power Supply Rejection Ratio Large-Signal Voltage Gain Output Swing Output Current Slew Rate Supply Current CONDITIONS
0°C ≤ TA ≤ 70°C, RL = 1k, VCM = 0V unless otherwise noted.
MIN TYP 1 2 25 100 4 83 73 2.5 2.0 ± 12.0 ± 3.0 24 20 250 98 84 7 7 ± 13.3 ± 3.3 40 40 400 7 10.5 MAX 4 5 600 9 UNITS mV mV µV/°C nA µA dB dB V/mV V/mV V V mA mA V/µs mA
VS = ±15V, (Note 2) VS = ±5V, (Note 2) VS = ±15V and VS = ± 5V VS = ±15V and VS = ± 5V VS = ±15V, VCM = ±12V and VS = ±5V, VCM = ± 2.5V VS = ±5V to ±15V VS = ±15V, VOUT = ±10V, RL = 500Ω VS = ±5V, VOUT = ± 2.5V, RL = 500Ω VS = ±15V, RL = 500Ω VS = ±5V, RL = 500Ω or 150Ω VS = ±15V, VOUT = ±12V VS = ±5V, VOUT = ± 3V VS = ±15V, AVCL = – 2, (Note 3) VS = ±15V and VS = ± 5V
Note 1: A heat sink may be required to keep the junction temperature below absolute maximum when the output is shorted indefinitely. Note 2: Input offset voltage is tested with automated test equipment in
