LT1633CS View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LT1633CS Datasheet PDF : 16 Pages
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TYPICAL PERFORMANCE CHARACTERISTICS
Harmonic Distortion vs Frequency
0
VS = 5V, 0V
AV = 1
–20 VIN = 2VP-P
RL = 150Ω
RL = 1k
–40
3RD
–60
2ND
–80
–100
100
3RD
2ND
200
500 1000
FREQUENCY (kHz)
2000
1632/33 G29
5V Small-Signal Response
VS = 5V, 0V
AV = 1
RL = 1k
163233 G25
Harmonic Distortion vs Frequency
0
VS = 5V, 0V
AV = –1
–20 VIN = 2VP-P
RL = 150Ω
RL = 1k
–40
2ND
3RD
–60
3RD 2ND
–80
–100
100
200
500 1000
FREQUENCY (kHz)
2000
16312/03030G30
±15V Small-Signal Response
VS = ±15V
AV = 1
RL = 1k
1632/33 G27
LT1632/LT1633
5V Large-Signal Response
VS = 5V, 0V
AV = 1
RL = 1k
1632/33 G26
±15V Large-Signal Response
VS = ±15V
AV = 1
RL = 1k
1632/33 G28
APPLICATIONS INFORMATION
Rail-to-Rail Input and Output
The LT1632/LT1633 are fully functional for an input and
output signal range from the negative supply to the posi-
tive supply. Figure 1 shows a simplified schematic of the
amplifier. The input stage consists of two differential
amplifiers, a PNP stage Q1/Q2 and an NPN stage Q3/Q4
that are active over different ranges of input common
mode voltage. The PNP differential input pair is active for
input common mode voltages VCM between the negative
supply to approximately 1.5V below the positive supply.
As VCM moves closer toward the positive supply, the
transistor Q5 will steer the tail current I1 to the current
mirror Q6/Q7, activating the NPN differential pair and the
PNP pair becomes inactive for the rest of the input com-
mon mode range up to the positive supply.
The output is configured with a pair of complementary
common emitter stages Q14/Q15 that enables the output
to swing from rail to rail. These devices are fabricated on
Linear Technology’s proprietary complementary bipolar
process to ensure similar DC and AC characteristics.
Capacitors C1 and C2 form local feedback loops that lower
the output impedance at high frequencies.
Power Dissipation
The LT1632/LT1633 amplifiers combine high speed and
large output current drive in a small package. Because the
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