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OPERATIONAL AMPLIFIER. UA748I Datasheet |
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UA748
PRECISION SINGLE OPERATIONAL AMPLIFIER
s INPUT OFFSET VOLTAGE : 3mV max. OVER
TEMPERATURE
s FREQUENCY COMPENSATION WITH A
SINGLE 30pF CAPACITOR (C1)
s OPERATION FROM ±5V to ±15V
s LOW POWER CONSUMPTION :
50mW AT ±15V
s CONTINUOUS SHORT-CIRCUIT PROTEC-
TION
s OPERATION AS A COMPARATOR WITH
DIFFERENTIAL INPUTS AS HIGH AS ±30V
s NO LATCH-UP WHEN COMMON-MODE
RANGE IS EXCEEDED
s SAME PIN CONFIGURATION AS THE
LM101A
DESCRIPTION
The UA748 is a general purpose operational am-
plifier built on a single silicon chip. The resulting
close match and tight thermal coupling gives low
offsets and temperature drift as well as fast recov-
ery from thermal transients.
s Short-circuit protection
s Offset voltage null capability
s Large common-mode and differential voltage
ranges
s Low power consumption
s No latch-up
The unity-gain compensation specified makes the
circuit stable for all feedback configurations, even
with capacitive loads. However, it is possible to
optimize compensation for best high frequency
performance at any gain. The low power dissipa-
tion permits high voltage operation and simplifies
packaging in full-temperature range systems.
PIN CONNECTIONS (top view)
N
DIP8
(Plastic Package)
D
SO8
(Plastic Micropackage)
ORDER CODE
Part Number Temperature Range
UA748C
0°C, +70°C
UA748I
-40°C, +105°C
UA748M
-55°C, +125°C
Example : UA748CN
Package
N
D
•
•
•
•
•
•
N = Dual in Line Package (DIP)
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
1 - Offset null 1/frequency compensation
1
8
2 - Inverting input
3 - Non-inverting input
2
7
4 - VCC-
5 - Offset null 2
6 - Output
3
6
7 - VCC+
8 - Frequency compensation
4
5
December 2001
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UA748
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
UA748M UA748I
VCC Supply voltage
±22
Vid Differential Input Voltage
±30
Vi Input Voltage
±15
Ptot Power Dissipation 1)
500
Output Short-circuit Duration
Infinite
Toper Operating Free-air Temperature Range
-55 to +125 -40 to +105
Tstg Storage Temperature Range
-65 to +150
1. Power dissipation must be considered to ensure maximum junction temperature (Tj) is not exceeded.
UA748C
0 to +70
Unit
V
V
V
mW
°C
°C
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UA748
ELECTRICAL CHARACTERISTICS
VCC = ±15V, Tamb = +25°C, C1 = 30pF (unless otherwise specified)
Symbol
Parameter
UA748I/M
Min. Typ. Max.
Input Offset Voltage (Rs ≤ 10kΩ)
Vio
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
0.7 2
3
Input Offset Current
Iio
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
1.5 10
20
Input Bias Current
Iib
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
25 75
10
Large Signal Voltage Gain (Vo = ±10V, RL = 2kΩ)
Avd
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
50 100
25
SVR
Supply Voltage Rejection Ratio (Rs ≤ 10kΩ)
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
80 96
80
Supply Current, no load
ICC
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
1.8 3
3
Input Common Mode Voltage Range (VCC = ±20V)
Vicm
Tamb = +25°C
±15
Tmin ≤ Tamb ≤ Tmax
±15
CMR
Common Mode Rejection Ratio (RS ≤ 10kΩ)
Tamb = +25°C
Tmin ≤ Tamb ≤ Tmax
80 96
80
IOS Output short Circuit Current
10 30 50
±Vopp
Output Voltage Swing (VCC = ±15V)
Tamb = +25°C
RL = 10kΩ
RL = 2kΩ
Tmin ≤ Tamb ≤ Tmax
RL = 10kΩ
RL = 2kΩ
12 14
10 13
12
10
SR
Slew Rate 1)
Vi = ±10V, RL = 2kΩ, CL = 100pF, unity Gain
0.25 0.5
tr
Rise Time
Vi = ±20mV, RL = 2kΩ, CL = 100pF, unity Gain
0.3
Kov
Overshoot
Vi = 20mV, RL = 2kΩ, CL = 100pF, unity Gain
5
Zi Input Impedance (VCC = ±15V)
1.5 4
Ro Output Resistance (VCC = ±15V)
75
Gain Bandwith Product
GBP
Vi =10mV, RL = 2kΩ, CL = 100pF, f =100kHz
0.5 1
Total Harmonic Distortion
THD
f =1kHz, Av =20dB, RL =2kΩ, Vo =2Vpp, CL = 100pF
0.015
Input Offset Current Drift
DIio
25°C ≤ Tmax
Tmin ≤ Tamb ≤ Tmax
10 100
20 200
DVio
Input Offset Voltage Drift
Tmin ≤ Tamb ≤ Tmax
3 15
1. May be improved up to 10V/µs in inverting amplifier configuration.
UA748C
Unit
Min. Typ. Max.
2 7.5 mV
10
2 50 nA
70
70 250 nA
300
25 100
15
V/mV
70 96
dB
70
1.8 3 mA
3
±15
V
±15
70 96
dB
70
10 30 50 mA
12 14
10 13
V
12
10
0.25 0.5
0.3
5
1.5 4
75
0.5 1
0.015
V/µs
µs
%
MΩ
Ω
MHz
%
10 300 pA/°C
20 600
6
30 µV/°C
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