Datasheet LT1222 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | 500MHz, 3nV/√Hz, AV ≥ 10 Operational Amplifier |
| Seiten / Seite | 12 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Large Signal, AV = 10,. Small … |
| Dateiformat / Größe | PDF / 262 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Large Signal, AV = 10,. Small Signal, A. Large Signal, A. V = 10. CL = 10,000pF
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LT1222
W U TYPICAL PERFORMANCE CHARACTERISTICS Large Signal, AV = 10, Small Signal, A Large Signal, A V = 10 V = 10 CL = 10,000pF
R LT1222 • TPC19 LT1222 • TPC20 LT1222 • TPC21 F = 909Ω VS = ±15V f = 5MHz RF = 909Ω VS = ±15V f = 2MHz RF = 909Ω VS = ±15V f = 20kHz RG = 100Ω VIN = 20mV RG = 100Ω VIN = 2V RG = 100Ω VIN = 2V
Small Signal, AV = – 10, Small Signal, AV = – 10 Large Signal, AV = – 10 CL = 1,000pF
LT1222 • TPC22 LT1222 • TPC23 LT1222 • TPC24 R VS = ±15V f = 5MHz R F = 1k F = 1k VS = ±15V f = 2MHz RF = 1k VS = ±15V f = 500kHz R VIN = 20mV R G = 100Ω (75) G = 100Ω (75) VIN = 2V RG = 100Ω (75) VIN = 15mV
U U W U APPLICATIONS INFORMATION
The LT1222 is stable in noise gains of 10 or greater and
Layout and Passive Components
may be inserted directly into HA2520/2/5, HA2541/2/4, The LT1222 amplifier is easy to apply and tolerant of less AD817, AD847, EL2020, EL2044 and LM6361 applica- than ideal layouts. For maximum performance (for ex- tions, provided that the nulling circuitry is removed and ample, fast settling time) use a ground plane, short lead the amplifier configuration has a high enough noise gain. lengths and RF-quality bypass capacitors (0.01μF to 0.1μF). The suggested nulling circuit for the LT1222 is shown in For high drive current applications use low ESR bypass the following figure. capacitors (1μF to 10μF tantalum). Sockets should be
Offset Nulling
avoided when maximum frequency performance is re- V+ quired. For more details see Design Note 50. Feedback 5k resistors greater than 5k are not recommended because a 1 0.1μF 3 pole is formed with the input capacitance which can cause 8 + 7 6 peaking or oscillations. Stray capacitance on Pin 5 should LT1222 2 4 be minimized. Bias current cancellation circuitry is em- – ployed on the inputs of the LT1222 so the input bias current 0.1μF and input offset current have identical specifications. For V– LT1222 • AI01 this reason, matching the impedance on the inputs to reduce bias current errors is not necessary. 1222fc 6
W U TYPICAL PERFORMANCE CHARACTERISTICS Large Signal, AV = 10, Small Signal, A Large Signal, A V = 10 V = 10 CL = 10,000pF
R LT1222 • TPC19 LT1222 • TPC20 LT1222 • TPC21 F = 909Ω VS = ±15V f = 5MHz RF = 909Ω VS = ±15V f = 2MHz RF = 909Ω VS = ±15V f = 20kHz RG = 100Ω VIN = 20mV RG = 100Ω VIN = 2V RG = 100Ω VIN = 2V
Small Signal, AV = – 10, Small Signal, AV = – 10 Large Signal, AV = – 10 CL = 1,000pF
LT1222 • TPC22 LT1222 • TPC23 LT1222 • TPC24 R VS = ±15V f = 5MHz R F = 1k F = 1k VS = ±15V f = 2MHz RF = 1k VS = ±15V f = 500kHz R VIN = 20mV R G = 100Ω (75) G = 100Ω (75) VIN = 2V RG = 100Ω (75) VIN = 15mV
U U W U APPLICATIONS INFORMATION
The LT1222 is stable in noise gains of 10 or greater and
Layout and Passive Components
may be inserted directly into HA2520/2/5, HA2541/2/4, The LT1222 amplifier is easy to apply and tolerant of less AD817, AD847, EL2020, EL2044 and LM6361 applica- than ideal layouts. For maximum performance (for ex- tions, provided that the nulling circuitry is removed and ample, fast settling time) use a ground plane, short lead the amplifier configuration has a high enough noise gain. lengths and RF-quality bypass capacitors (0.01μF to 0.1μF). The suggested nulling circuit for the LT1222 is shown in For high drive current applications use low ESR bypass the following figure. capacitors (1μF to 10μF tantalum). Sockets should be
Offset Nulling
avoided when maximum frequency performance is re- V+ quired. For more details see Design Note 50. Feedback 5k resistors greater than 5k are not recommended because a 1 0.1μF 3 pole is formed with the input capacitance which can cause 8 + 7 6 peaking or oscillations. Stray capacitance on Pin 5 should LT1222 2 4 be minimized. Bias current cancellation circuitry is em- – ployed on the inputs of the LT1222 so the input bias current 0.1μF and input offset current have identical specifications. For V– LT1222 • AI01 this reason, matching the impedance on the inputs to reduce bias current errors is not necessary. 1222fc 6