Datasheet LT1354 (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | 12MHz, 400V/µs Op Amp |
| Seiten / Seite | 12 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS. Large-Signal Transient. V = 1). V = … |
| Dateiformat / Größe | PDF / 266 Kb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS. Large-Signal Transient. V = 1). V = –1). V = 1, CL = 10,000pF). APPLICATIONS INFORMATION
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LT1354
W U TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Transient Large-Signal Transient Large-Signal Transient (A (A (A V = 1) V = –1) V = 1, CL = 10,000pF)
1354 TA34 1354 TA35 1354 TA36
U U W U APPLICATIONS INFORMATION
The LT1354 may be inserted directly into many high The parallel combination of the feedback resistor and gain speed amplifier applications improving both DC and AC setting resistor on the inverting input can combine with performance, provided that the nulling circuitry is the input capacitance to form a pole which can cause removed. The suggested nulling circuit for the LT1354 is peaking or oscillations. For feedback resistors greater shown below. than 5kΩ, a parallel capacitor of value
Offset Nulling
CF > (RG • CIN)/RF V+ should be used to cancel the input pole and optimize 3 7 + dynamic performance. For unity-gain applications where 6 LT1354 a large feedback resistor is used, C 4 F should be greater 2 – 8 than or equal to CIN. 1 10k
Capacitive Loading
V– The LT1354 is stable with any capacitive load. This is 1354 AI01 accomplished by sensing the load induced output pole and
Layout and Passive Components
adding compensation at the amplifier gain node. As the capacitive load increases, both the bandwidth and phase The LT1354 amplifier is easy to apply and tolerant of less margin decrease so there will be peaking in the frequency than ideal layouts. For maximum performance (for domain and in the transient response as shown in the example fast settling time) use a ground plane, short lead typical performance curves.The photo of the small-signal lengths, and RF-quality bypass capacitors (0.01µF to response with 1000pF load shows 43% peaking. The large 0.1µF). For high drive current applications use low ESR signal response with a 10,000pF load shows the output bypass capacitors (1µF to 10µF tantalum). Sockets should slew rate being limited to 5V/µs by the short-circuit be avoided when maximum frequency performance is current. Coaxial cable can be driven directly, but for best required, although low profile sockets can provide pulse fidelity a resistor of value equal to the characteristic reasonable performance up to 50MHz. For more details impedance of the cable (i.e., 75Ω) should be placed in see Design Note 50. series with the output. The other end of the cable should be terminated with the same value resistor to ground. 9
W U TYPICAL PERFORMANCE CHARACTERISTICS Large-Signal Transient Large-Signal Transient Large-Signal Transient (A (A (A V = 1) V = –1) V = 1, CL = 10,000pF)
1354 TA34 1354 TA35 1354 TA36
U U W U APPLICATIONS INFORMATION
The LT1354 may be inserted directly into many high The parallel combination of the feedback resistor and gain speed amplifier applications improving both DC and AC setting resistor on the inverting input can combine with performance, provided that the nulling circuitry is the input capacitance to form a pole which can cause removed. The suggested nulling circuit for the LT1354 is peaking or oscillations. For feedback resistors greater shown below. than 5kΩ, a parallel capacitor of value
Offset Nulling
CF > (RG • CIN)/RF V+ should be used to cancel the input pole and optimize 3 7 + dynamic performance. For unity-gain applications where 6 LT1354 a large feedback resistor is used, C 4 F should be greater 2 – 8 than or equal to CIN. 1 10k
Capacitive Loading
V– The LT1354 is stable with any capacitive load. This is 1354 AI01 accomplished by sensing the load induced output pole and
Layout and Passive Components
adding compensation at the amplifier gain node. As the capacitive load increases, both the bandwidth and phase The LT1354 amplifier is easy to apply and tolerant of less margin decrease so there will be peaking in the frequency than ideal layouts. For maximum performance (for domain and in the transient response as shown in the example fast settling time) use a ground plane, short lead typical performance curves.The photo of the small-signal lengths, and RF-quality bypass capacitors (0.01µF to response with 1000pF load shows 43% peaking. The large 0.1µF). For high drive current applications use low ESR signal response with a 10,000pF load shows the output bypass capacitors (1µF to 10µF tantalum). Sockets should slew rate being limited to 5V/µs by the short-circuit be avoided when maximum frequency performance is current. Coaxial cable can be driven directly, but for best required, although low profile sockets can provide pulse fidelity a resistor of value equal to the characteristic reasonable performance up to 50MHz. For more details impedance of the cable (i.e., 75Ω) should be placed in see Design Note 50. series with the output. The other end of the cable should be terminated with the same value resistor to ground. 9