Datasheet LT1567 (Analog Devices) - 6
| Fabricante | Analog Devices |
| Descripción | 1.4nV/√Hz 180MHz Filter Building Block |
| Páginas / Página | 16 / 6 — PI FU CTIO S. OAOUT (Pin 1):. DC BIAS (Pin 5):. OAIN (Pin 2):. BYPASS … |
| Formato / tamaño de archivo | PDF / 208 Kb |
| Idioma del documento | Inglés |
PI FU CTIO S. OAOUT (Pin 1):. DC BIAS (Pin 5):. OAIN (Pin 2):. BYPASS (Pin 3):. INVIN (Pin 6):. Power Supply Pins (Pins 4, 8):
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LT1567
U U U PI FU CTIO S OAOUT (Pin 1):
Output of the Uncommitted Op Amp (OA).
DC BIAS (Pin 5):
DC Biasing Input. Sets the DC voltage at As with most wideband op amps, it is important to avoid the noninverting inputs of the two internal amplifiers; connecting heavy capacitive loads (above about 10pF) designed for use as a DC reference, not a signal input.The directly to this output. Such loads will impair AC stability DC BIAS input includes a small series resistor, both to and should be isolated from the output through series balance DC offsets in the presence of input bias currents resistance. and also to suppress the “Q” factor of possible parasitic high frequency resonant circuits introduced by wiring
OAIN (Pin 2):
Inverting or “–” Input of the Uncommitted inductance. The reference voltage at the noninverting Op Amp (OA) in the LT1567. The noninverting or “+” input inputs of the two amplifiers is decoupled for very high of this amplifier is shared with that of the INV amplifier and frequencies with a small internal capacitor to the chip accessed via the DC BIAS and BYPASS pins. The OA substrate, nominally 7pF. An external capacitor, typically amplifier is optimized for minimal wideband noise. 0.1µF, to a nearby ground plane must be added at Pin 3
BYPASS (Pin 3):
AC Ground Bypass. A decoupling capaci- (BYPASS) for a clean wideband DC reference biasing tor, typically 0.1µF, from this pin to a printed circuit ground voltage. plane must be used. Use the shortest possible wiring.
INVIN (Pin 6):
Unity-Gain Inverter Input. The “inverter”
Power Supply Pins (Pins 4, 8):
The V– and V+ pins should (INV) amplifier in the LT1567 is connected to internal be bypassed with 0.1µF capacitors to an adequate analog resistors (nominally 600Ω each) to form a closed-loop ground plane using the shortest possible wiring. Electri- amplifier with a wideband voltage gain of nominally –1. cally clean supplies and a low impedance ground are This amplifier is similar to the uncommitted op amp (OA) important to obtain the wide dynamic range and band- but is optimized for high frequency linearity. width available from the LT1567. Low noise linear power
INVOUT (Pin 7):
Output of the INV or “Inverter” Amplifier, supplies are recommended. Switching supplies require with a Nominal Gain of –1 from the INVIN Pin. As with special care because of the inevitable risk of their switch- most wideband op amps, it is important to avoid connect- ing noise coupling into the signal path, reducing dynamic ing heavy capacitive loads (above about 10pF) directly to range. this output. Such loads will impair AC stability and should be isolated from the output through series resistance. 1567fa 6
U U U PI FU CTIO S OAOUT (Pin 1):
Output of the Uncommitted Op Amp (OA).
DC BIAS (Pin 5):
DC Biasing Input. Sets the DC voltage at As with most wideband op amps, it is important to avoid the noninverting inputs of the two internal amplifiers; connecting heavy capacitive loads (above about 10pF) designed for use as a DC reference, not a signal input.The directly to this output. Such loads will impair AC stability DC BIAS input includes a small series resistor, both to and should be isolated from the output through series balance DC offsets in the presence of input bias currents resistance. and also to suppress the “Q” factor of possible parasitic high frequency resonant circuits introduced by wiring
OAIN (Pin 2):
Inverting or “–” Input of the Uncommitted inductance. The reference voltage at the noninverting Op Amp (OA) in the LT1567. The noninverting or “+” input inputs of the two amplifiers is decoupled for very high of this amplifier is shared with that of the INV amplifier and frequencies with a small internal capacitor to the chip accessed via the DC BIAS and BYPASS pins. The OA substrate, nominally 7pF. An external capacitor, typically amplifier is optimized for minimal wideband noise. 0.1µF, to a nearby ground plane must be added at Pin 3
BYPASS (Pin 3):
AC Ground Bypass. A decoupling capaci- (BYPASS) for a clean wideband DC reference biasing tor, typically 0.1µF, from this pin to a printed circuit ground voltage. plane must be used. Use the shortest possible wiring.
INVIN (Pin 6):
Unity-Gain Inverter Input. The “inverter”
Power Supply Pins (Pins 4, 8):
The V– and V+ pins should (INV) amplifier in the LT1567 is connected to internal be bypassed with 0.1µF capacitors to an adequate analog resistors (nominally 600Ω each) to form a closed-loop ground plane using the shortest possible wiring. Electri- amplifier with a wideband voltage gain of nominally –1. cally clean supplies and a low impedance ground are This amplifier is similar to the uncommitted op amp (OA) important to obtain the wide dynamic range and band- but is optimized for high frequency linearity. width available from the LT1567. Low noise linear power
INVOUT (Pin 7):
Output of the INV or “Inverter” Amplifier, supplies are recommended. Switching supplies require with a Nominal Gain of –1 from the INVIN Pin. As with special care because of the inevitable risk of their switch- most wideband op amps, it is important to avoid connect- ing noise coupling into the signal path, reducing dynamic ing heavy capacitive loads (above about 10pF) directly to range. this output. Such loads will impair AC stability and should be isolated from the output through series resistance. 1567fa 6