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PDF LV2622 Data sheet ( Hoja de datos )
| Número de pieza | LV2622 | |
| Descripción | LOW VOLTAGE RAIL-TO-RAIL I/O CMOS DUAL OP AMPS | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
LV2622
Preliminary
LINEAR INTEGRATED CIRCUIT
250μA, 3MHZ, LOW VOLTAGE
RAIL-TO-RAIL I/O CMOS DUAL
OP AMPS
DESCRIPTION
The UTC LV2622 is low noise, low voltage and low power dual
operational amplifiers that can be designed into a wide range of
applications. With a 3MHz unity-gain frequency and a guaranteed
1.7V/μs slew rate, the quiescent current is only 250μA/amplifier
(5.0V).
The UTC LV2622 provides rail-to-rail output swing into heavy
loads. The input common-mode voltage range includes ground and
the maximum input offset voltage is 3mV. It is specified over the
extended industrial temperature range (−40°C~+125°C). The
operating range is 2.5V~5.5V. The UTC LV2622 provides optimal
performance in low voltage and low noise systems.
FEATURES
* Low Cost
* Rail-to-Rail Output Swing
* Input Rail: - 0.1V~+5.6V with VS=5.5V
* Typical VOS: 0.7mV
* Gain-Bandwidth Product: 3MHz
* High Slew Rate: 1.7V/µs
* Settling Time to 0.1% with 2V Step: 2.1µs
* Overload Recovery Time: 1µs
* Low Noise Voltage: 12nV/ Hz
* Operates on 2.5V~5.5V Supplies
* Low Power: 250µA/Amplifier Typical Supply Current
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
LV2622L-S08-R
LV2622G-S08-R
LV2622L-S08-T
LV2622G-S08-T
Package
SOP-8
SOP-8
LV2622L-S08-R
(1)Packing Type
(2)Package Type
(4)Lead Free
(1) R: Tape Reel, T: Tube
(2) S08: SOP-8
(3) G: Halogen Free, L: Lead Free
SOP-8
Packing
Tape Reel
Tube
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., Ltd
1 of 8
QW-R102-045.a
1 page  
LV2622
Preliminary
LINEAR INTEGRATED CIRCUIT
APPLICATION NOTES
Driving a Capacitive Load
The UTC LV2622 can directly drive 1000pF in unity-gain without oscillation. The unity-gain follower (buffer) is the
most sensitive configuration to capacitive loading. When the amplifier is configured in this manner, capacitive
loading directly on the output will decrease the device’s phase margin leading to high frequency ringing
or oscillations. It is recommended that an isolation resistor (RISO) is placed in series with the output of the
amplifier when the greater capacitive load is required. The circuit is shown in Figure 1. The RISO and the load
capacitor CL form a zero to increase stability, but this method results in a loss of gain accuracy for RISO dividing the
voltage with RLOAD.
The circuit in Figure 2 provides DC accuracy and AC stability. To increase the DC accuracy, RF should be
connected between the inverting input and the output. To preserve the phase margin in the overall feedback loop, CF
is required and can compensate the loss of phase margin together with RIso by feeding the high frequency
component of the output signal back to the amplifier’s inverting input
.
CF
-
UTC LV2622
VIN + 1/2
RISO
RF
CL
VOUT
RL
Figure 2. Indirectly Driving Heavy Capacitive Load with DC Accuracy
For no-buffer configuration, there are two others ways to increase the phase margin: (a) by increasing the
amplifier’s gain or (b) by placing a capacitor in parallel with the feedback resistor to counteract the parasitic
capacitance associated with inverting node.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 8
QW-R102-045.a
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LV2622.PDF ] | |
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