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CLC1020 Schematic ( PDF Datasheet ) - Exar

Teilenummer CLC1020
Beschreibung Rail to Rail Amplifiers
Hersteller Exar
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Gesamt 14 Seiten
CLC1020 Datasheet, Funktion
Data Sheet
CLC1020
General Purpose, Rail to Rail Output Amplifier
Rail to Rail Amplifiers
FEATURES
n 127μA supply current
n 2.1MHz gain bandwidth
n Input voltage range with 5V supply:
-0.4V to 4.3V
n Output voltage range with 5V supply:
0.01V to 4.99V
n 2.7V/μs slew rate
n 0.7pA bias current
n 0.1mV input offset voltage
n No crossover distortion
n Fully specified at 2.7V and 5V supplies
n Pb-free TSOT-5
APPLICATIONS
n Portable/battery-powered applications
n Mobile communications, cell phones,
pagers
n ADC buffer
n Active filters
n Portable test instruments
n Medical Equipment
n Portable medical instrumentation
General Description
The COMLINEAR CLC1020 is a single channel, high-performance, voltage
feedback amplifier. The CLC1020 provides 2.1MHz gain bandwidth product
and 2.7V/μs slew rate making it well suited for high-performance battery
powered-systems. This COMLINEAR high-performance amplifier also offers
low input offset voltage and low bias current.
The COMLINEAR CLC1020 consumes only 127μA supply current and is
designed to operate from a supply range of 2.7V to 5.5V (±1.35 to ±2.75).
The input voltage range extends 400mV below the negative rail and 700mV
below the positive rail. The CLC1020 amplifier operates over the extended
temperature range of -40°C to +125°C.
The CLC1020 is packaged in the space saving TSOT-5 package. The TSOT-5
package is pin compatible with the SOT23-5 package.
Typical Performance Examples
Vout vs. Vcm
 








       
 












Slew Rate vs. Supply Voltage




Vin = 1Vpp
   

Ordering Information
Part Number
Package
CLC1020IST5X
TSOT-5
Moisture sensitivity level for all parts is MSL-1.
Pb-Free
Yes
RoHS Compliant
Yes
Operating Temperature Range Packaging Method
-40°C to +125°C
Reel
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 - Fax. +1 510 668-7001






CLC1020 Datasheet, Funktion
Data Sheet
Typical Performance Characteristics - Continued
TA = 25°C, VS = +5V, Rf = Rg =10kΩ, RL = 10kΩ to VS/2, G = 2; unless otherwise noted.
Non-Inverting Freq. Resp. +5V
Non-Inverting Freq. Resp. +2.7V



 







 

Inverting Freq. Resp. +5V




 







 


NNNooonnn---IIInnnvvvIeenerrvrttteiiinnnrgtgginSSSgmmmFaaarllelllqSSS.iiigggRnnneaaaslllpPPP.uuu+lllsss2eee.7RRRVeeessspppooonnnssseee



 







 


Freq. Resp. vs. CL RL=1kΩ +5V

 


  








 





 



 







 


Freq. Resp. vs. CL RL=1kΩ +2.7V

 


  








 





 
©2009-2013 Exar Corporation
6/14
Rev 1B

6 Page









CLC1020 pdf, datenblatt
Data Sheet
the supplies.
PD = Psupply - Pload
Supply power is calculated by the standard power
equation.
Psupply = Vsupply × IRMS supply
Vsupply = VS+ - VS-
Power delivered to a purely resistive load is:
Pload = ((VLOAD)RMS2)/Rloadeff
The effective load resistor (Rloadeff) will need to include
the effect of the feedback network. For instance,
Rloadeff in Figure 3 would be calculated as:
RL || (Rf + Rg)
These measurements are basic and are relatively easy to
perform with standard lab equipment. For design purposes
however, prior knowledge of actual signal levels and load
impedance is needed to determine the dissipated power.
Here, PD can be found from
PD = PQuiescent + PDynamic - PLoad
Quiescent power can be derived from the specified IS
values along with known supply voltage, VSUPPLY. Load
power can be calculated as above with the desired signal
amplitudes using:
(VLOAD)RMS = VPEAK / √2
( ILOAD)RMS = ( VLOAD)RMS / Rloadeff
The dynamic power is focused primarily within the output
stage driving the load. This value can be calculated as:
PDYNAMIC = (VS+ - VLOAD)RMS × ( ILOAD)RMS
Assuming the load is referenced in the middle of the power
rails or Vsupply/2.
The CLC1020 is short circuit protected. However, this may
not guarantee that the maximum junction temperature
(+150°C) is not exceeded under all conditions.
Input
+
-
Rg
Rf
Rs Output
CL RL
Figure 5. Addition of RS for Driving Capacitive Loads
For a given load capacitance, adjust RS to optimize the
tradeoff between settling time and bandwidth. In general,
reducing RS will increase bandwidth at the expense of
additional overshoot and ringing.
Overdrive Recovery
An overdrive condition is defined as the point when either
one of the inputs or the output exceed their specified
voltage range. Overdrive recovery is the time needed for
the amplifier to return to its normal or linear operating
point. The recovery time varies, based on whether the
input or output is overdriven and by how much the range
is exceeded. The CLC1020 and will typically recover in less
than 5us from an overdrive condition. Figure 6 shows the
CLC1020 in an overdriven condition.


 





     
μs)
Figure 6. Overdrive Recovery
Driving Capacitive Loads
Increased phase delay at the output due to capacitive
loading can cause ringing, peaking in the frequency
response, and possible unstable behavior. Use a series
resistance, RS, between the amplifier and the load to help
improve stability and settling performance. Refer to Figure
5.
Layout Considerations
General layout and supply bypassing play major roles
in high frequency performance. CADEKA has evaluation
boards to use as a guide for high frequency layout and as
an aid in device testing and characterization. Follow the
steps below as a basis for high frequency layout:
▪▪Include 6.8µF and 0.1µF ceramic capacitors for power
©2009-2013 Exar Corporation
12/14
Rev 1B

12 Page





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