Datasheet LT1361, LT1362 (Analog Devices) - 9
| Fabricante | Analog Devices |
| Descripción | Dual and Quad 50MHz, 800V/µs Op Amps |
| Páginas / Página | 12 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient. Small-Signal … |
| Formato / tamaño de archivo | PDF / 236 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient. Small-Signal Transient. (AV = 1). (AV = –1). (AV = –1, CL = 500pF)
Línea de modelo para esta hoja de datos
Versión de texto del documento
LT1361/LT1362
W U TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient Small-Signal Transient Small-Signal Transient (AV = 1) (AV = –1) (AV = –1, CL = 500pF)
1361/1362 TA31 1361/1362 TA32 1361/1362 TA33
Large-Signal Transient Large-Signal Transient Large-Signal Transient (A (A (A V = 1) V = –1) V = 1, CL = 10,000pF)
1361/1362 TA34 1361/1362 TA35 1361/1362 TA36
U U W U APPLICATIONS INFORMATION Layout and Passive Components Input Considerations
The LT1361/LT1362 amplifiers are easy to use and toler- Each of the LT1361/LT1362 inputs is the base of an NPN ant of less than ideal layouts. For maximum performance and a PNP transistor whose base currents are of opposite (for example, fast 0.01% settling) use a ground plane, polarity and provide first-order bias current cancellation. short lead lengths, and RF-quality bypass capacitors Because of variation in the matching of NPN and PNP beta, (0.01µF to 0.1µF). For high drive current applications use the polarity of the input bias current can be positive or low ESR bypass capacitors (1µF to 10µF tantalum). The negative. The offset current does not depend on NPN/PNP parallel combination of the feedback resistor and gain beta matching and is well controlled. The use of balanced setting resistor on the inverting input combine with the source resistance at each input is recommended for input capacitance to form a pole which can cause peaking applications where DC accuracy must be maximized. or oscillations. If feedback resistors greater than 5kΩ are The inputs can withstand transient differential input volt- used, a parallel capacitor of value ages up to 10V without damage and need no clamping or source resistance for protection. Differential inputs, how- CF > RG x CIN/RF ever, generate large supply currents (tens of mA) as required for high slew rates. If the device is used with should be used to cancel the input pole and optimize sustained differential inputs, the average supply current dynamic performance. For unity-gain applications where will increase, excessive power dissipation will result and a large feedback resistor is used, CF should be greater the part may be damaged.
The part should not be used as
than or equal to CIN.
a comparator, peak detector or other open-loop applica-
9
W U TYPICAL PERFORMANCE CHARACTERISTICS Small-Signal Transient Small-Signal Transient Small-Signal Transient (AV = 1) (AV = –1) (AV = –1, CL = 500pF)
1361/1362 TA31 1361/1362 TA32 1361/1362 TA33
Large-Signal Transient Large-Signal Transient Large-Signal Transient (A (A (A V = 1) V = –1) V = 1, CL = 10,000pF)
1361/1362 TA34 1361/1362 TA35 1361/1362 TA36
U U W U APPLICATIONS INFORMATION Layout and Passive Components Input Considerations
The LT1361/LT1362 amplifiers are easy to use and toler- Each of the LT1361/LT1362 inputs is the base of an NPN ant of less than ideal layouts. For maximum performance and a PNP transistor whose base currents are of opposite (for example, fast 0.01% settling) use a ground plane, polarity and provide first-order bias current cancellation. short lead lengths, and RF-quality bypass capacitors Because of variation in the matching of NPN and PNP beta, (0.01µF to 0.1µF). For high drive current applications use the polarity of the input bias current can be positive or low ESR bypass capacitors (1µF to 10µF tantalum). The negative. The offset current does not depend on NPN/PNP parallel combination of the feedback resistor and gain beta matching and is well controlled. The use of balanced setting resistor on the inverting input combine with the source resistance at each input is recommended for input capacitance to form a pole which can cause peaking applications where DC accuracy must be maximized. or oscillations. If feedback resistors greater than 5kΩ are The inputs can withstand transient differential input volt- used, a parallel capacitor of value ages up to 10V without damage and need no clamping or source resistance for protection. Differential inputs, how- CF > RG x CIN/RF ever, generate large supply currents (tens of mA) as required for high slew rates. If the device is used with should be used to cancel the input pole and optimize sustained differential inputs, the average supply current dynamic performance. For unity-gain applications where will increase, excessive power dissipation will result and a large feedback resistor is used, CF should be greater the part may be damaged.
The part should not be used as
than or equal to CIN.
a comparator, peak detector or other open-loop applica-
9