Device
Operating
Temperature Range
Package
MC33502
SEMICONDUCTOR
TECHNICAL DATA
LOW VOLTAGE
RAILTORAIL DUAL
OPERATIONAL AMPLIFIER
ORDERING INFORMATION
MC33502P
MC33502D
TA = 40
to +105
C
Plastic DIP
SO8
D SUFFIX
PLASTIC PACKAGE
CASE 751
(SO8)
PIN CONNECTIONS
Order this document by MC33502/D
P SUFFIX
PLASTIC PACKAGE
CASE 626
8
1
8
1
1
8
7
6
5
2
3
4
Inputs 1
Output 1
VEE
VCC
Output 2
Inputs 2
(Dual, Top View)
2
1
1
MOTOROLA ANALOG IC DEVICE DATA
Advance Information
One Volt SMARTMOS
TM
Rail-to-Rail Dual
Operational Amplifier
The MC33502 operational amplifier provides railtorail operation on both
the input and output. The output can swing within 50 mV of each rail. This
railtorail operation enables the user to make full use of the entire supply
voltage range available. It is designed to work at very low supply voltages
(1.0 V and ground), yet can operate with a supply of up to 7.0 V and ground.
Output current boosting techniques provide high output current capability
while keeping the drain current of the amplifier to a minimum.
Low Voltage, Single Supply Operation (1.0 V and Ground to
7.0 V and Ground)
High Input Impedance: Typically 40 fA Input Current
Typical Unity Gain Bandwidth @ 5.0 V = 5.0 MHz, @ 1.0 V = 4.0 MHz
High Output Current (ISC = 50 mA @ 5.0 V, 10 mA @ 1.0 V)
Output Voltage Swings within 50 mV of Both Rails @ 1.0 V
Input Voltage Range Includes Both Supply Rails
High Voltage Gain: 100 dB Typical @ 1.0 V
No Phase Reversal on the Output for OverDriven Input Signals
Input Offset Trimmed to 0.5 mV Typical
Low Supply Current (ID = 1.2 mA/per Amplifier, Typical)
600
Drive Capability
Extended Operating Temperature Range (40 to 105
C)
APPLICATIONS
Single Cell NiCd/Ni MH Powered Systems
Interface to DSP
Portable Communication Devices
Low Voltage Active Filters
Telephone Circuits
Instrumentation Amplifiers
Audio Applications
Power Supply Monitor and Control
Compatible with VCX Logic
Simplified Block Diagram
This device contains 98 active transistors per amplifier.
Inputs
Input
Stage
Outputs
Buffer with 0 V
Level Shift
Saturation
Detector
Offset
Voltage
Trim
Base
Current
Boost
Base
Current
Boost
Output
Stage
This document contains information on a new product. Specifications and information herein
are subject to change without notice.
Motorola, Inc. 1998
Rev 0
MC33502
2
MOTOROLA ANALOG IC DEVICE DATA
MAXIMUM RATINGS
Rating
Symbol
Value
Unit
Supply Voltage (VCC to VEE)
VS
7.0
V
ESD Protection Voltage at any Pin
H man Bod Model
VESD
2000
V
Human Body Model
Voltage at Any Device Pin
VDP
VS
0.3
V
Input Differential Voltage Range
VIDR
VCC to VEE
V
Common Mode Input Voltage Range
VCM
VCC to VEE
V
Output Short Circuit Duration
tS
(Note 1)
s
Maximum Junction Temperature
TJ
150
C
Storage Temperature Range
Tstg
65 to 150
C
Maximum Power Dissipation
PD
(Note 1)
mW
NOTES: 1. Power dissipation must be considered to ensure maximum junction temperature (TJ) is not
exceeded.
2. ESD data available upon request.
DC ELECTRICAL CHARACTERISTICS
(VCC = 5.0 V, VEE = 0 V, VCM = VO = VCC/2, RL to VCC/2, TA = 25
C, unless
otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Input Offset Voltage (VCM = 0 to VCC)
VIO
mV
VCC = 1.0 V
TA = 25
C
5.0
0.5
5.0
TA = 40
to 105
C
7.0
7.0
VCC = 3.0 V
TA = 25
C
5.0
0.5
5.0
TA = 40
to 105
C
7.0
7.0
VCC = 5.0 V
TA = 25
C
5.0
0.5
5.0
TA = 40
to 105
C
7.0
7.0
Input Offset Voltage Temperature Coefficient (RS = 50
)
VIO/
T
8.0
V/
C
TA = 40
to 105
C
Input Bias Current (VCC = 1.0 to 5.0 V)
I IIB I
40
fA
Common Mode Input Voltage Range
VICR
VEE
VCC
V
Large Signal Voltage Gain
AVOL
kV/V
VCC = 1.0 V (TA = 25
C)
RL = 10 k
25
100
RL = 1.0 k
5.0
50
VCC = 3.0 V (TA = 25
C)
RL = 10 k
50
500
RL = 1.0 k
25
100
VCC = 5.0 V (TA = 25
C)
RL = 10 k
50
500
RL = 1.0 k
25
200
MC33502
3
MOTOROLA ANALOG IC DEVICE DATA
DC ELECTRICAL CHARACTERISTICS
(continued) (VCC = 5.0 V, VEE = 0 V, VCM = VO = VCC/2, RL to VCC/2, TA = 25
C, unless
otherwise noted.)
Characteristic
Unit
Max
Typ
Min
Symbol
Output Voltage Swing, High (VID =
0.2 V)
VOH
V
VCC = 1.0 V (TA = 25
C)
RL = 10 k
0.9
0.95
RL = 600
0.85
0.88
VCC = 1.0 V (TA = 40
to 105
C)
RL = 10 k
0.85
RL = 600
0.8
VCC = 3.0 V (TA = 25
C)
RL = 10 k
2.9
2.93
RL = 600
2.8
2.84
VCC = 3.0 V (TA = 40
to 105
C)
RL = 10 k
2.85
RL = 600
2.75
VCC = 5.0 V (TA = 25
C)
RL = 10 k
4.9
4.92
RL = 600
4.75
4.81
VCC = 5.0 V (TA = 40
to 105
C)
RL = 10 k
4.85
RL = 600
4.7
Output Voltage Swing, Low (VID =
0.2 V)
VOL
V
VCC = 1.0 V (TA = 25
C)
RL = 10 k
0.05
0.02
RL = 600
0.1
0.05
VCC = 1.0 V (TA = 40
to 105
C)
RL = 10 k
0.1
RL = 600
0.15
VCC = 3.0 V (TA = 25
C)
RL = 10 k
0.05
0.02
RL = 600
0.1
0.08
VCC = 3.0 V (TA = 40
to 105
C)
RL = 10 k
0.1
RL = 600
0.15
VCC = 5.0 V (TA = 25
C)
RL = 10 k
0.05
0.02
RL = 600
0.15
0.1
VCC = 5.0 V (TA = 40
to 105
C)
RL = 10 k
0.1
RL = 600
0.2
Common Mode Rejection (Vin = 0 to 5.0 V)
CMR
60
75
dB
Power Supply Rejection Ratio
VOL
60
75
V/V
VCC/VEE = 5.0 V/Ground to 3.0 V/Ground
Output Short Circuit Current (Vin Diff =
1.0 V)
ISC
mA
VCC = 1.0 V
Source
6.0
13
26
Sink
10
13
26
VCC = 3.0 V
Source
15
32
60
Sink
40
64
140
VCC = 5.0 V
Source
20
40
140
Sink
40
70
140
Power Supply Current (Per Amplifier, VO = 0 V)
ID
mA
VCC = 1.0 V
1.2
1.75
VCC = 3.0 V
1.5
2.0
VCC = 5.0 V
1.65
2.25
VCC = 1.0 V (TA = 40 to 105
C)
2.0
VCC = 3.0 V (TA = 40 to 105
C)
2.25
VCC = 5.0 V (TA = 40 to 105
C)
2.5
MC33502
4
MOTOROLA ANALOG IC DEVICE DATA
AC ELECTRICAL CHARACTERISTICS
(VCC = 5.0 V, VEE = 0 V, VCM = VO = VCC/2, TA = 25
C, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Slew Rate (VS =
2.5 V, VO = 2.0 to 2.0 V, RL = 2.0 k
, AV = 1.0)
SR
V/
s
Positive Slope
2.0
3.0
6.0
Negative Slope
2.0
3.0
6.0
Unity Gain Bandwidth
BW
MHz
VCC = 1.0 V
3.0
4.0
6.0
VCC = 3.0 V
3.5
4.5
7.0
VCC = 5.0 V
4.0
5.0
8.0
Gain Margin (RL =10 k
, CL = 0 pF)
Am
6.5
dB
Phase Margin (RL = 10 k
, CL = 0 pF)
m
60
Deg
Channel Separation (f = 1.0 Hz to 20 kHz, RL = 600
)
CS
120
dB
Power Bandwidth (VO = 4.0 Vpp, RL = 1.0 k
, THD
1.0%)
BWP
200
kHz
Total Harmonic Distortion (VO = 4.5 Vpp, RL = 600
, AV = 1.0)
THD
%
f = 1.0 kHz
0.004
f = 10 kHz
0.01
Differential Input Resistance (VCM = 0 V)
Rin
>1.0
terra
Differential Input Capacitance (VCM = 0 V)
Cin
2.0
pF
Equivalent Input Noise Voltage (VCC = 1.0 V, VCM = 0 V, VEE = Gnd,
en
nV/
Hz
RS = 100
)
f = 1.0 kHz
30
f = 10 kHz
60
Figure 1. Representative Block Diagram
Offset
Voltage
Trim
Output
Voltage
Saturation
Detector
Body
Bias
Clamp
VCC
VCC
VCC
VCC
IN
Out
IN+
MC33502
5
MOTOROLA ANALOG IC DEVICE DATA
GENERAL INFORMATION
The MC33502 dual operational amplifier is unique in its
ability to provide 1.0 V railtorail performance on both the
input and output by using a SMARTMOS process. The
amplifier output swings within 50 mV of both rails and is able
to provide 50 mA of output drive current with a 5.0 V supply,
and 10 mA with a 1.0 V supply. A 5.0 MHz bandwidth and a
slew rate of 3.0 V/
s is achieved with high speed depletion
mode NMOS (DNMOS) and vertical PNP transistors. This
device is characterized over a temperature range of 40
C
to 105
C.
CIRCUIT INFORMATION
Input Stage
One volt railtorail performance is achieved in the
MC33502 at the input by using a single pair of depletion
mode NMOS devices (DNMOS) to form a differential
amplifier with a very low input current of 40 fA. The normal
input common mode range of a DNMOS device, with an ion
implanted negative threshold, includes ground and relies on
the body effect to dynamically shift the threshold to a positive
value as the gates are moved from ground towards the
positive supply. Because the device is manufactured in a
pwell process, the body effect coefficient is sufficiently large
to ensure that the input stage will remain substantually
saturated when the inputs are at the positive rail. This also
applies at very low supply voltages. The 1.0 V railtorail
input stage consists of a DNMOS differential amplifier, a
folded cascode, and a low voltage balanced mirror. The low
voltage cascoded balanced mirror provides high 1st stage
gain and base current cancellation without sacrificing signal
integrity. Also, the input offset voltage is trimmed to less than
1.0 mV because of the limited available supply voltage. The
body voltage of the input DNMOS differential pair is internally
trimmed to minimize the input offset voltage. A common
mode feedback path is also employed to enable the offset
voltage to track over the input common mode voltage. The
total operational amplifier quiescent current drop is
1.3 mA/amp.
Output Stage
An additional feature of this device is an "on demand" base
current cancellation amplifier. This feature provides base
drive to the output power devices by making use of a buffer
amplifier to perform a voltagetocurrent conversion. This is
done in direct proportion to the load conditions. This "on
demand" feature allows these amplifiers to consume only a
few microamps of current when the output stage is in its
quiescent mode. Yet it provides high output current when
required by the load. The railtorail output stage current
boost circuit provides 50 mA of output current with a 5.0 V
supply (For a 1.0 V supply output stage will do 10 mA)
enabling the operational amplifier to drive a 600
load. A
buffer is necessary to isolate the load current effects in the
output stage from the input stage. Because of the low voltage
conditions, a DNMOS follower is used to provide an
essentially zero voltage level shift. This buffer isolates any
load current changes on the output stage from loading the
input stage. A high speed vertical PNP transistor provides
excellent frequency performance while sourcing current. The
operational amplifier is also internally compensated to
provide a phase margin of 60 degrees. It has a unity gain of
5.0 MHz with a 5.0 V supply and 4.0 MHz with a 1.0 V supply.
LOW VOLTAGE OPERATION
The MC33502 will operate at supply voltages from 0.9 to
7.0 V and ground. When using the MC33502 at supply
voltages of less than 1.2 V, input offset voltage may
increase slightly as the input signal swings within
approximately 50 mV of the positive supply rail. This effect
occurs only for supply voltages below 1.2 V, due to the input
depletion mode MOSFETs starting to transition between the
saturated to linear region, and should be considered when
designing high side dc sensing applications operating at the
positive supply rail. Since the device is railtorail on both
input and output, high dynamic range single battery cell
applications are now possible.
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