MC33077D ON Semiconductor, MC33077D Datasheet - Page 12

• Manufacturer Part Number: MC33077D
• Description: Op Amps Dual 11V/us Low
• Manufacturer: ON Semiconductor

Specifications of MC33077D

• Number Of Channels: 2
• Voltage Gain Db: 65.34 dB
• Common Mode Rejection Ratio (min): 85 dB
• Input Voltage Range (max): Positive Rail - 1.5 V
• Input Voltage Range (min): Negative Rail + 1.5 V
• Input Offset Voltage: 1 mV
• Operating Supply Voltage: +/- 18 V
• Supply Current: 3.5 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Maximum Dual Supply Voltage: +/- 18 V
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: No

amplifier’s input capacitance, creating a pole near the closed
loop corner frequency, lead capacitor compensation
techniques (lead capacitor in parallel with the feedback
resistor) can be employed to improve stability. The feedback
resistor and lead capacitor RC time constant should be larger
than that of the uncompensated input pole frequency. Having
a high resistance connected to the noninverting input of the
amplifier can create a like instability problem. Compensation
for this condition can be accomplished by adding a lead
capacitor in parallel with the noninverting input resistor of
such a value as to make the RC time constant larger than the
RC time constant of the uncompensated input resistor acting
in conjunction with the amplifiers input capacitance.
component placement and printed circuit board layout
should be exercised. For example, long unshielded input or
output leads may result in unwanted input output coupling.
In order to reduce the input capacitance, the body of resistors
connected to the input pins should be physically close to the
input pins. This not only minimizes the input pole creation
for optimum frequency response, but also minimizes
extraneous signal “pickup” at this node. Power supplies
should be decoupled with adequate capacitance as close as
possible to the device supply pin.
source resistance values should be low to take full advantage
For optimum frequency performance and stability, careful
In addition to amplifier stability considerations, input
Note: All capacitors are non−polarized.
10 W
Voltage Gain = 50,000
−
+
D.U.T.
100 kW
0.1 mF
2.0 kW
4.7 mF
Figure 37. Voltage Noise Test Circuit
(0.1 Hz to 10 Hz
http://onsemi.com
24.3 kW
MC33077
12
of the low noise characteristics of the amplifier. Thermal
noise (Johnson Noise) of a resistor is generated by
thermally−charged carriers randomly moving within the
resistor creating a voltage. The RMS thermal noise voltage
in a resistor can be calculated from:
where:
produce a 4.0
is connected to the input of the amplifier, the noise voltage
will be gained−up in accordance to the amplifier’s gain
configuration. For this reason, the selection of input source
resistance for low noise circuit applications warrants serious
consideration. The total noise of the amplifier, as referred to
its inputs, is typically only 4.4
protected from a direct short to ground, However, under such
conditions, it is important not to allow the amplifier to exceed
the maximum junction temperature rating. Typically for
to ground without exceeding the temperature rating.
15 V supplies, any one output can be shorted continuously
By way of reference, a 1.0 kW resistor at 25 C will
The output of any one amplifier is current limited and thus
MC33077
k = Boltzmann’s Constant (1.38
T = Kelvin temperature
R = Resistance in ohms
BW = Upper and lower frequency limit in Hertz.
p−p
+
−
0.1 mF
1/2
)
100 kW
nV/ Hz
4.3 kW
2.2 mF
E
nr
=
of RMS noise voltage. If this resistor
22 mF
/
4k TR
110 kW
nV/ Hz
R
Scope 1
in
BW
10
= 1.0 MW
−23
at 1.0 kHz.
joules/k)