TI UA748C

uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
•
•
•
•
•
•
•
uA748C . . . D OR P PACKAGE
uA748M . . . JG PACKAGE
(TOP VIEW)
Frequency and Transient Response
Characteristics Adjustable
Short-Circuit Protection
Offset-Voltage Null Capability
Wide Common-Mode and Differential
Voltage Ranges
Low Power Consumption
No Latch-Up
Same Pin Assignments as uA709
N1/COMP
IN –
IN +
VCC –
1
8
2
7
3
6
4
5
COMP
VCC +
OUT
N2
uA748M . . . U FLAT PACKAGE
(TOP VIEW)
NC
N1/COMP
IN –
IN +
VCC –
description
The uA748 is a general-purpose operational
amplifier that offers the same advantages and
attractive features as the uA741 except for internal
compensation. External compensation can be as
simple as a 30-pF capacitor for unity-gain
conditions and, when the closed-loop gain is
greater than one, can be changed to obtain wider
bandwidth or higher slew rate. This circuit features
high gain, large differential and common-mode
input voltage range, and output short-circuit
protection. Input offset-voltage adjustment can be
provided by connecting a variable resistor
between the offset null pins as shown in Figure 12.
1
10
2
9
3
8
4
7
5
6
NC
COMP
VCC +
OUT
N2
NC – No internal connection
symbol
COMP
N1/COMP
N2
The uA748C is characterized for operation from
0°C to 70°C; the uA748M is characterized for
operation over the full military temperature range
of – 55°C to 125°C.
IN +
+
OUT
–
IN –
AVAILABLE OPTIONS
PACKAGE
TA
0°C
to
70°C
–55°C
to
125°C
VIO max
AT 25°C
8-PIN
10-PIN
SMALL OUTLINE
(D)
CERAMIC DIP
(JG)
PLASTIC DIP
(P)
FLAT PACK
(U)
6 mV
uA748CD
—
uA748CP
—
5 mV
—
uA748MJG
—
uA747MU
The D package is available taped and reeled. Add the suffix R to the device type,(e.g., uA748CDR).
Copyright  1990, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
schematic
COMP
IN –
VCC +
34 Ω
IN +
OUT
34 Ω
N2
1 kΩ
50 kΩ
1 kΩ
VCC –
N1/COMP
Resistor values shown are nominal.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
uA748C
uA748M
UNIT
Supply voltage, VCC + (see Note 1)
18
22
V
Supply voltage, VCC – (see Note 1)
– 18
– 22
V
Differential input voltage (see Note 2)
± 30
± 30
V
± 15
± 15
V
Voltage range between either offset null terminal (N1/N2) and VCC –
– 0.5 to 2
– 0.5
V
Duration of output short circuit (see Note 4)
unlimited
unlimited
Input voltage (either input, see Notes 1 and 3)
Continuous total power dissipation
See Dissipation Rating Table
0 to 70
– 55 to 125
°C
– 65 to 150
– 65 to 150
°C
300
°C
Operating free-air temperature range
Storage temperature range
Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds
JG or U package
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds
D or P package
NOTES: 1.
2.
3.
4.
°C
260
All voltage values, unless otherwise noted, are with respect to the midpoint between VCC + and VCC –.
Differential voltages are at the noninverting input terminal with respect to the inverting input terminal.
The magnitude of the input voltage must never exceed the magnitude of the supply voltage or 15V, whichever is less.
The output may be shorted to ground or either power supply. For the uA748M only, the unlimited duration of the short circuit applies
at (or below) 125°C case temperature or 75°C free-air temperature
DISSIPATION RATING TABLE
2
PACKAGE
TA ≤ 25°C
POWER RATING
DERATING
FACTOR
D
500 mW
5.8 mW/°C
DERATE
ABOVE TA
64°C
464 mW
N/A
JG
500 mW
8.4 mW/°C
90°C
500 mW
210 mW
P
500 mW
N/A
N/A
500 mW
N/A
U
500 mW
5.4 mW/°C
57°C
432 mW
135 mW
POST OFFICE BOX 655303
TA = 70°C
POWER RATING
• DALLAS, TEXAS 75265
TA = 125°C
POWER RATING
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
electrical characteristics at specified free-air temperature, VCC ± = ±15 V, CC = 30 pF
uA748C
TEST CONDITIONS†
PARAMETER
MIN
25°C
VIO
Input offset voltage
VO = 0
Full range
IIO
Input offset current
VO = 0
Full range
IIB
Input bias current
VO = 0
Full range
VICR
VO(PP)
Maximum peak
output voltage swing
80
± 12
RL= 10 kΩ
25°C
± 12
RL ≥ 10 kΩ
RL= 2 kΩ
Full range
± 12
25°C
± 10
RL ≥ 2 kΩ
Full range
± 10
RL ≥ 2 kΩ,
25°C
20
Full range
15
25°C
0.3
ri
Input resistance
ro
Output resistance
Ci
Input capacitance
CMRR
Common-mode
rejection ratio
VIC = VICRmin,
VO = 0
Supply-voltage
sensitivity
(∆VIO / ∆VCC)
VCC = ± 9 V to ± 15 V,
VO = 0
VO = 0,
See Note 5
25°C
Short-circuit
output current
ICC
Supply current
No load
load,
VO = 0
PD
Power dissipation
(each amplifier)
No load
load,
VO = 0
1
5
6
200
20
500
± 13
80
70
Full range
70
25°C
500
1500
± 12
± 13
± 14
± 12
± 10
nA
V
± 13
50
200
V/mV
25
2
0.3
90
70
2
MΩ
75
Ω
1.4
pF
90
dB
70
30
150
30
150
150
± 25
± 40
± 25
± 40
25°C
1.7
2.8
1.7
2.8
Full range
3.3
50
µV/V
150
25°C
25°C
nA
± 10
200
Full range
Full range
mV
± 14
± 12
± 13
UNIT
V
± 12
1.4
25°C
200
500
75
25°C
IOS
MAX
800
± 12
VO = ± 10 V
6
TYP
300
25°C
AVD
kSVS
20
Full range
Large-signal
g
g
differential
voltage amplification
MIN
7.5
25°C
input voltage range
uA748M
MAX
1
25°C
Common-mode
TYP
3.3
85
50
100
85
100
mA
mA
mW
† All characteristics are measured under open-loop conditions with zero common-mode input voltage unless otherwise specified. Full range for
uA748C is 0°C to 70°C and for uA748M is – 55°C to 125°C.
NOTE 5: This typical value applies only at frequencies above a few hundred hertz because of the effects of drift and thermal feedback.
operating characteristics, VCC ± = ± 15 V, TA = 25°C
PARAMETER
tr
SR
Rise time
TEST CONDITIONS
MIN
TYP
0.3
Overshoot factor
mV RL = 2 kΩ
pF CC = 30 pF,
pF See Figure 1
VI = 20 mV,
kΩ, CL = 100 pF,
5%
Slew rate at unity gain
VI = 10 V, RL = 2 kΩ, CL = 100 pF, CC = 30 pF, See Figure 1
0.5
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
MAX
UNIT
µs
V/µs
3
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
PARAMETER MEASUREMENT INFORMATION
N2 (open)
–
VI
OUT
+
Input
0V
CL
100 pF
INPUT VOLTAGE
WAVEFORM
COMP
RL = 2 kΩ
N1
CC = 30 pF
TEST CIRCUIT
Figure 1. Rise Time, Overshoot, and Slew Rate
TYPICAL CHARACTERISTICS†
INPUT BIAS CURRENT
vs
FREE-AIR TEMPERATURE
INPUT OFFSET CURRENT
vs
FREE-AIR TEMPERATURE
100
400
VCC ± = ± 15 V
80
70
60
ÏÏÏÏ
ÏÏÏÏ
uA748C
50
40
30
VCC ± = ± 15 V
350
I IB – Input Bias Current – nA
IIB
IIO
I IO – Input Offset Current – nA
90
300
250
ÏÏÏ
ÏÏÏ
uA748C
200
150
100
20
50
10
0
– 60 – 40 – 20 0
20 40 60 80 100 120 140
TA – Free-Air Temperature – °C
0
– 60 – 40 – 20 0
20 40 60 80 100 120 140
TA – Free-Air Temperature – °C
Figure 2
Figure 3
† Data at high and low temperatures are applicably only within the rated operating free-air temperature range of the particular devices.
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
TYPICAL CHARACTERISTICS
MAXIMUM PEAK OUTPUT VOLTAGE
vs
LOAD RESISTANCE
MAXIMUM PEAK OUTPUT VOLTAGE
vs
FREQUENCY
± 13
± 12
± 11
± 10
±9
±8
±7
ÁÁ
ÁÁ
±5
0.1
0.2
0.4
0.7 1
2
4
RL – Load Resistance – kΩ
7
VCC ± = ± 15 V
RL = 10 kΩ
CC = 30 pF
TA = 25°C
± 18
± 16
± 14
± 12
± 10
±8
±6
ÁÁ
ÁÁ
±6
±4
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
± 20
VCC ± = ± 15 V
TA = 25°C
VOM
VOM – Maximum Peak Output Voltage – V
VOM
VOM – Maximum Peak Output Voltage – V
± 14
±4
±2
10
0
100
1k
Figure 4
OPEN-LOOP LARGE-SIGNAL DIFFERENTIAL
VOLTAGE AMPLIFICATION
vs
FREQUENCY
10 7
RL = 2 kΩ
TA = 25°C
AAVD
VD – Differential Voltage Amplification
AVD
A
VD – Differential Voltage Amplification V/mV
400
200
100
40
10
2
4
6
8
10 12 14 16
|VCC ±| – Supply Voltage – V
18
20
VCC ± = ± 15 V
RL = 2 kΩ
CC = 30 pF
TA = 25°C
106
105
104
103
102
ÁÁ
ÁÁ
20
0
1M
Figure 5
OPEN-LOOP LARGE-SIGNAL DIFFERENTIAL
VOLTAGE AMPLIFICATION
vs
SUPPLY VOLTAGE
ÁÁ
ÁÁ
ÁÁ
10 k
100 k
f – Frequency – Hz
101
1
10 – 1
1
10
Figure 6
100
1 k 10 k 100 k 1 M
f – Frequency – Hz
10 M 100 M
Figure 7
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
TYPICAL CHARACTERISTICS
OUTPUT VOLTAGE
vs
ELAPSED TIME
COMMON-MODE REJECTION RATIO
vs
FREQUENCY
28
VCC ± = ± 15 V
RS = 10 kΩ
CC = 30 pF
TA = 25°C
90
80
24
20
VO
VO – Output Voltage – mV
CMRR – Common-Mode Rejection Ratio – dB
100
70
60
50
90%
16
12
ÁÁ
ÁÁ
40
30
20
8
4
10%
ÏÏÏ
0
10
0
tr
–4
1
10
100
1 k 10 k 100 k 1 M
f – Frequency – Hz
10 M 100 M
0
0.5
Figure 8
VOLTAGE-FOLLOWER
LARGE-SIGNAL PULSE RESPONSE
8
VCC ± = ± 15 V
RL = 2 kΩ
CL = 100 pF
CC = 30 pF
TA = 25°C
Input and Output Voltages – V
ÏÏÏÏ
ÏÏÏÏ
4
Output
2
0
Input
–2
–4
–6
–8
0
10
20
30 40 50
t – Time – µs
60
70
80
Figure 10
6
1
1.5
t – Time – µs
Figure 9
6
POST OFFICE BOX 655303
VCC ± = ± 15 V
RL = 2 kΩ
CL = 100 pF
CC = 30 pF
TA = 25°C
• DALLAS, TEXAS 75265
90
2
2.5
uA748C, uA748M
GENERAL-PURPOSE OPERATIONAL AMPLIFIERS
SLOS095 – D921, DECEMBER 1970 – REVISED OCTOBER 1990
TYPICAL APPLICATION DATA
VCC +
–
+
VO
VI
COMP
VCC –
N1
N2
(open)
30 pF
ri = 400 MΩ
ci = 1 pF
BW = 1 MHz
Figure 11. Unity-Gain Voltage Follower
R2
VCC +
R1
–
VI
+ * R2
R1
R1 @ 30 pF
C w
R1 ) R2
R3 + R1 @ R2
R1 ) R2
VO
VI
R3
+
VO
RL ≥ 2 kΩ
C
VCC –
N1
COMP
N2
5 MΩ
CC
5.1 MΩ
Figure 12. Inverting Circuit With Adjustable Gain
Compensation and Offset Adjustment
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
7
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Copyright  1998, Texas Instruments Incorporated