UA748
PRECISION SINGLE OPERATIONAL AMPLIFIER
s
INPUT OFFSET VOLTAGE : 3mV max. OVER
s
s
s
s
s
s
s
TEMPERATURE
FREQUENCY COMPENSATION WITH A
SINGLE 30pF CAPACITOR (C1)
OPERATION FROM ±5V to ±15V
LOW POWER CONSUMPTION :
50mW AT ±15V
CONTINUOUS SHORT-CIRCUIT PROTEC-
TION
OPERATION AS A COMPARATOR WITH
DIFFERENTIAL INPUTS AS HIGH AS ±30V
NO LATCH-UP WHEN COMMON-MODE
RANGE IS EXCEEDED
SAME PIN CONFIGURATION AS THE
LM101A
N
DIP8
(Plastic Package)
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)
1 - Offset null 1/frequency compensation
2 - Inverting input
3 - Non-inverting input
4 - V
CC-
5 - Offset null 2
6 - Output
7 - V
CC+
8 - Frequency compensation
D
SO8
(Plastic Micropackage)
ORDER CODE
Package
Part Number
Temperature Range
N
UA748C
0°C, +70°C
UA748I
-40°C, +105°C
UA748M
-55°C, +125°C
Example :
UA748CN
•
•
•
D
•
•
•
N =
Dual in Line Package (DIP)
D =
Small Outline Package (SO) - also available in Tape & Reel (DT)
1
2
3
4
8
7
6
5
December 2001
1/7
UA748
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CC
V
id
V
i
P
tot
T
oper
T
stg
1.
Parameter
Supply voltage
Differential Input Voltage
Input Voltage
Power Dissipation
1)
Output Short-circuit Duration
Operating Free-air Temperature Range
Storage Temperature Range
UA748M
UA748I
±22
±30
±15
500
Infinite
UA748C
Unit
V
V
V
mW
-55 to +125
-40 to +105
-65 to +150
0 to +70
°C
°C
Power dissipation must be considered to ensure maximum junction temperature (Tj) is not exceeded.
2/7
UA748
ELECTRICAL CHARACTERISTICS
V
CC
= ±15V, T
amb
= +25°C, C1 = 30pF (unless otherwise specified)
UA748I/M
Symbol
Parameter
Min.
V
io
Input Offset Voltage (R
s
≤
10kΩ)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Input Offset Current
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Input Bias Current
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Large Signal Voltage Gain
(V
o
= ±10V, R
L
= 2kΩ)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Supply Voltage Rejection Ratio (R
s
≤
10kΩ)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Supply Current, no load
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Input Common Mode Voltage Range (V
CC
= ±20V)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
Common Mode Rejection Ratio (R
S
≤
10kΩ)
T
amb
= +25°C
T
min
≤
T
amb
≤
T
max
±15
±15
80
80
10
12
10
12
10
0.25
96
30
14
13
50
50
25
80
80
Typ.
0.7
Max.
2
3
10
20
75
10
25
15
70
70
3
3
±15
±15
70
70
10
12
10
12
10
0.25
96
30
14
13
50
Min.
Typ.
2
Max.
7.5
10
50
70
250
300
mV
UA748C
Unit
I
io
1.5
2
nA
I
ib
25
70
nA
A
vd
100
100
V/mV
SVR
96
96
dB
I
CC
1.8
1.8
3
3
mA
V
icm
V
CMR
I
OS
dB
mA
Output short Circuit Current
Output Voltage Swing (V
CC
= ±15V)
T
amb
= +25°C
R
L
= 10kΩ
R
L
= 2kΩ
±V
opp
T
min
≤
T
amb
≤
T
max
R
L
= 10kΩ
R
L
= 2kΩ
SR
t
r
K
ov
Z
i
Ro
GBP
THD
DI
io
DV
io
1.
V
Slew Rate
1)
V
i
= ±10V, R
L
= 2kΩ, C
L
= 100pF, unity Gain
Rise Time
V
i
= ±20mV, R
L
= 2kΩ, C
L
= 100pF, unity Gain
Overshoot
V
i
= 20mV, R
L
= 2kΩ, C
L
= 100pF, unity Gain
Input Impedance (V
CC
= ±15V)
Output Resistance (V
CC
= ±15V)
Gain Bandwith Product
V
i
=10mV, R
L
= 2kΩ, C
L
= 100pF, f =100kHz
Total Harmonic Distortion
f =1kHz, A
v
=20dB, R
L
=2kΩ, V
o
=2V
pp
,
C
L
= 100pF
Input Offset Current Drift
25°C
≤
T
max
T
min
≤
T
amb
≤
T
max
Input Offset Voltage Drift
T
min
≤
T
amb
≤
T
max
0.5
0.3
5
0.5
0.3
5
V/µs
µs
%
MΩ
Ω
MHz
%
300
600
30
pA/°C
µV/°C
1.5
4
75
1.5
4
75
0.5
1
0.015
10
20
3
100
200
15
0.5
1
0.015
10
20
6
May be improved up to 10V/µs in inverting amplifier configuration
.
3/7
UA748
4/7
UA748
SINGLE POLE COMPENSATION
5/7
京公网安备 11010802033920号
EEWORLD
