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LT1221 Datasheet(PDF) 6 Page - Linear Technology |
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LT1221 Datasheet(HTML) 6 Page - Linear Technology |
6 / 12 page 6 LT1221 TYPICAL PERFORMANCE CHARACTERISTICS Large Signal, AV = 4 Small Signal, AV = 4 VS = ±15V VIN = 25mV f = 5MHz LT1221 • TPC19 VS = ±15V VIN = 5VP-P f = 2MHz LT1221 • TPC20 Large Signal, AV = 4, CL = 10,000pF LT1221 • TPC21 f = 20kHz VS = ±15V VIN = 5VP-P Small Signal, AV = – 4 VS = ±15V VIN = 25mV f = 5MHz LT1221 • TPC22 VS = ±15V VIN = 5VP-P f = 2MHz LT1221 • TPC23 LT1221 • TPC24 f = 500kHz VS = ±15V VIN = 42mV Large Signal, AV = – 4 Small Signal, AV = – 4, CL = 1,000pF APPLICATIONS INFORMATION The LT1221 is stable in noise gains of 4 or greater and may be inserted directly into HA2520/2/5, HA2541/2/4, AD817, AD847, EL2020, EL2044 and LM6361 applications, pro- vided that the nulling circuitry is removed and the ampli- fier configuration has a high enough noise gain. The suggested nulling circuit for the LT1221 is shown in the following figure. Layout and Passive Components The LT1221 amplifier is easy to apply and tolerant of less than ideal layouts. For maximum performance (for ex- ample, fast settling time) use a ground plane, short lead lengths and RF-quality bypass capacitors (0.01 µFto0.1µF). For high drive current applications use low ESR bypass capacitors (1 µF to 10µF tantalum). Sockets should be avoided when maximum frequency performance is re- quired, although low profile sockets can provide reason- able performance up to 50MHz. For more details see Design Note 50. Feedback resistors greater than 5k are not recommended because a pole is formed with the input capacitance which can cause peaking or oscillations. Input Considerations Bias current cancellation circuitry is employed on the inputs of the LT1221 so the input bias current and input LT1221 • AI01 V+ V– 0.1 µF 0.1 µF 5k 3 2 4 7 6 8 1 LT1221 + – Offset Nulling |
Similar Part No. - LT1221_15 |
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Similar Description - LT1221_15 |
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