MC3458_07 Datasheet, PDF (4/12 Pages) ON Semiconductor – Dual, Low Power Operational Amplifiers

MC3458, MC3358
ELECTRICAL CHARACTERISTICS (V_CC = 5.0 V, V_EE = Gnd, T_A = 25°C, unless otherwise noted.)
MC3458
Characteristic
Symbol
Min
Typ
Max
Min
Input Offset Voltage
Input Offset Current
Input Bias Current
Large Signal Open Loop Voltage Gain
R_L = 2.0 kΩ,
Power Supply Rejection Ratio
V_IO
I_IO
I_IB
A_VOL
PSRR
–
2.0
5.0
–
–
30
50
–
–
–200 –500
–
20
200
–
20
–
–
150
–
Output Voltage Range (Note 5.)
R_L = 10 kΩ, V_CC = 5.0 V
R_L = 10 kΩ, 5.0 V ≤ V_CC ≤ 30 V
V_OR
3.3
3.5
–
3.3
–
V_CC
–
–
–1.7
Power Supply Current
I_CC
Channel Separation
CS
f = 1.0 kHz to 20 kHz (Input Referenced)
5. Output will swing to ground with a 10 kΩ pull down resistor.
–
2.5
7.0
–
–
–120
–
–
MC3358
Typ
2.0
–
–
200
–
3.5
V_CC
–1.7
2.5
–120
Max
10
75
–500
–
150
–
–
4.0
–
Unit
mV
nA
nA
V/mV
µV/V
V_pp
mA
dB
20 µs/DIV
Figure 2. Inverter Pulse Response
CIRCUIT DESCRIPTION
The MC3458/3358 is made using two internally
compensated, two–stage operational amplifiers. The first
stage of each consists of differential input devices Q24 and
Q22 with input buffer transistors Q25 and Q21 and the
differential to single ended converter Q3 and Q4. The first
stage performs not only the first stage gain function but also
performs the level shifting and transconductance reduction
functions. By reducing the transconductance, a smaller
compensation capacitor (only 5.0 pF) can be employed, thus
saving chip area. The transconductance reduction is
accomplished by splitting the collectors of Q24 and Q22.
Another feature of this input stage is that the input Common
Mode range can include the negative supply or ground, in
single supply operation, without saturating either the input
devices or the differential to single–ended converter. The
second stage consists of a standard current source load
amplifier stage.
The output stage is unique because it allows the output to
swing to ground in single supply operation and yet does not
exhibit any crossover distortion in split supply operation.
This is possible because Class AB operation is utilized.
Each amplifier is biased from an internal voltage regulator
which has a low temperature coefficient thus giving each
amplifier good temperature characteristics as well as
excellent power supply rejection.
http://onsemi.com
4