OPA348/OPA2348/OPA4348
1MHz, 45
µ
A, CMOS, Rail-to-Rail
OPERATIONAL AMPLIFIERS
FEATURES
q
LOW I
Q
: 45
µ
A typical
q
LOW COST
q
q
q
q
RAIL-TO-RAIL INPUT AND OUTPUT
SINGLE SUPPLY: +2.1V to +5.5V
INPUT BIAS CURRENT: 0.5pA
Micro
SIZE PACKAGES: SC70-5, SOT23-8 and
DESCRIPTION
The OPA348 series amplifiers are single supply, low-power,
CMOS op amps in micro packaging. Featuring an extended
bandwidth of 1MHz, and a supply current of 45µA, the
OPA348 series is useful for low-power applications on single
supplies of 2.1V to 5.5V.
Low supply current of 45µA, and an input bias current of
0.5pA, make the OPA348 series an optimal candidate for
low-power, high-impedance applications such as smoke de-
tectors and other sensors.
The OPA348 is available in the miniature SC70-5,
SOT23-5 and SO-8 packages. The OPA2348 is available in
SOT23-8 and SO-8 packages, and the OPA4348 is offered
in space-saving TSSOP-14 and SO-14 packages. The ex-
tended temperature range of –40°C to +125°C over all supply
voltages offers additional design flexibility.
TSSOP-14
q
HIGH SPEED:POWER WITH BANDWIDTH: 1MHz
APPLICATIONS
q
q
q
q
q
PORTABLE EQUIPMENT
BATTERY-POWERED EQUIPMENT
SMOKE ALARMS
CO DETECTORS
MEDICAL INSTRUMENTATION
Pin Assignment
OPA348
OPA348
Out
V–
+In
1
2
3
SOT23-5
OPA2348
5
V+
+In 1
V– 2
–In 3
SC70-5
Out A
1
2
A
+In A
3
4
5
B
–In B
6
7
TSSOP-14, SO-14
C
9
8
–In C
Out C
D
12
11
10
+In D
V–
+In C
14
13
Out D
–In D
5 V+
4 Out
OPA4348
4
–In
OPA348
8
V+
Out B
–In B
+In B
NC
–In
+In
V–
1
2
3
4
SO-8
8
7
6
5
NC
–In A
Out A
–In A
+In A
V–
1
2
3
4
SOT23-8, SO-8
A
B
7
6
5
V+
V+
+In B
Out
NC
Out B
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1
2018 AUG
OPA348/OPA2348/OPA4348
ABSOLUTE MAXIMUM RATINGS
(1)
Supply Voltage, V– to V+ ................................................................... 7.5V
Signal Input Terminals, Voltage
(2)
.................. (V–) – 0.5V to (V+) + 0.5V
Current
(2)
.................................................... 10mA
(3)
.............................................................. Continuous
Output Short-Circuit
Operating Temperature .................................................. –65°C to +150°C
Storage Temperature ..................................................... –65°C to +150°C
Junction Temperature ...................................................................... 150°C
Lead Temperature (soldering, 10s) ................................................. 300°C
NOTES: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may
degrade device reliability. These are stress ratings only. Functional opera-
tion of the device at these conditions, or beyond the specified operating
conditions, is not implied. (2) Input terminals are diode-clamped to the
power-supply rails. Input signals that can swing more than 0.5V beyond the
supply rails should be current-limited to 10mA or less. (3) Short-circuit to
ground, one amplifier per package.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degrada-
tion to complete device failure. Precision integrated circuits
may be more susceptible to damage because very small
parametric changes could cause the device not to meet its
published specifications.
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2
2018 AUG
OPA348/OPA2348/OPA4348
Boldface
limits apply over the specified temperature range,
T
A
= –40
°
C to +125
°
C
At T
A
= +25°C, R
L
= 100kΩ connected to V
S
/ 2 and V
OUT
= V
S
/ 2, unless otherwise noted.
OPA348
PARAMETER
OFFSET VOLTAGE
Input Offset Voltage
Over Temperature
Drift
vs Power Supply
Over Temperature
Channel Separation, dc
f = 1kHz
INPUT VOLTAGE RANGE
Common-Mode Voltage Range
Common-Mode Rejection Ratio
over Temperature
over Temperature
INPUT BIAS CURRENT
Input Bias Current
Input Offset Current
INPUT IMPEDANCE
Differential
Common-Mode
NOISE
Input Voltage Noise, f = 0.1Hz to 10Hz
Input Voltage Noise Density, f = 1kHz
Input Current Noise Density, f = 1kHz
OPEN-LOOP GAIN
Open-Loop Voltage Gain
over Temperature
over Temperature
OUTPUT
Voltage Output Swing from Rail
over Temperature
over Temperature
Short-Circuit Current
Capacitive Load Drive
FREQUENCY RESPONSE
Gain-Bandwidth Product
Slew Rate
Settling Time, 0.1%
0.01%
Overload Recovery Time
Total Harmonic Distortion + Noise
POWER SUPPLY
Specified Voltage Range
Minimum Operating Voltage
Quiescent Current (per amplifier)
over Temperature
TEMPERATURE RANGE
Specified Range
Operating Range
Storage Range
Thermal Resistance
SOT23-5 Surface-Mount
SOT23-8 Surface-Mount
MSOP-8 Surface-Mount
SO-8 Surface-Mount
SO-14 Surface-Mount
TSSOP-14 Surface-Mount
SC70-5 Surface-Mount
V
CM
< (V+) – 1.7V
e
n
i
n
A
OL
V
S
= 5V, R
L
= 100kΩ, 0.025V < V
O
< 4.975V
V
S
= 5V, R
L
= 100k
Ω
, 0.025V < V
O
< 4.975V
V
S
= 5V, R
L
= 5kΩ, 0.125V < V
O
< 4.875V
V
S
= 5V, R
L
= 5k
Ω
, 0.125V < V
O
< 4.875V
R
L
= 100kΩ, A
OL
> 94dB
R
L
= 100k
Ω
, A
OL
> 90dB
R
L
= 5kΩ, A
OL
> 90dB
R
L
= 5k
Ω
, A
OL
> 88dB
I
SC
C
LOAD
C
L
= 100pF
GBW
SR
t
S
G = +1
V
S
= 5.5V, 2V Step, G = +1
V
S
= 5.5V, 2V Step, G = +1
V
IN
• Gain > V
S
V
S
= 5.5V, V
O
= 3Vp-p, G = +1, f = 1kHz
2.5
I
O
= 0
2.1 to 5.5
45
1
0.5
5
7
1.6
0.0023
5.5
65
75
125
150
150
200
150
150
150
100
100
250
MHz
V/µs
µs
µs
µs
%
V
V
µA
µ
A
°C
°C
°C
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
°C/W
94
90
90
88
10
35
4
108
98
I
B
I
OS
CONDITION
MIN
OPA2348 OPA4348
TYP
MAX
UNITS
ELECTRICAL CHARACTERISTICS: V
S
= 2.5V to 5.5V
V
OS
dV
OS
/dT
PSRR
V
S
= 5V, V
CM
= (V–) + 0.8V
1
4
60
0.2
134
5
6
175
300
V
S
= 2.5V to 5.5V, V
CM
< (V+) – 1.7V
V
S
= 2.5V to 5.5V, V
CM
< (V+) – 1.7V
mV
mV
µ
V/
°
C
µV/V
µ
V/V
µV/V
dB
V
dB
dB
dB
dB
pA
pA
Ω
|| pF
Ω
|| pF
µVp-p
nV/√Hz
fA/√Hz
dB
dB
dB
dB
V
CM
CMRR
(V–) – 0.2V < V
CM
< (V+) – 1.7V
(V–) < V
CM
< (V+) – 1.7V
V
S
= 5.5V, (V–) – 0.2V < V
CM
< (V+) + 0.2V
V
S
= 5.5V, (V–) < V
CM
< (V+)
(V–) – 0.2
70
66
60
56
(V+) + 0.2
82
71
±0.5
±0.5
10
13
|| 3
10
13
|| 6
±10
±10
18
100
25
25
125
125
±10
See Typical Characteristics
mV
mV
mV
mV
mA
THD+N
V
S
I
Q
–40
–65
–65
θ
JA
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3
2018 AUG
OPA348/OPA2348/OPA4348
TYPICAL CHARACTERISTICS
At T
A
= +25°C, R
L
= 100kΩ connected to V
S
/ 2 and V
OUT
= V
S
/ 2, unless otherwise noted.
OPEN-LOOP GAIN AND PHASE vs FREQUENCY
140
120
0
100
PSRR AND CMRR vs FREQUENCY
Open-Loop Gain (dB)
PSRR, CMRR (dB)
100
80
60
40
20
0
–20
0.1
1
10
100
1k
10k
100k
1M
Frequency (Hz)
Gain
Phase
–45
80
CMRR
60
–90
Phase (°)
40
PSRR
20
–135
–180
10M
0
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
6
5
Channel Separation (dB)
Output Voltage (Vp-p)
CHANNEL SEPARATION vs FREQUENCY
140
V
S
= 5.5V
4
3
2
V
S
= 5V
120
100
V
S
= 2.5V
1
0
1k
10k
100k
Frequency (Hz)
1M
10M
80
60
10
100
1k
10k
100k
1M
10M
Frequency (Hz)
QUIESCENT AND SHORT-CIRCUIT CURRENT
vs SUPPLY VOLTAGE
65
I
SC
13
2.5
2
OUTPUT VOLTAGE SWING vs OUTPUT CURRENT
V
S
=
±2.5V
+125°C
+25°C
–40°C
Sourcing Current
Short-Circuit Current (mA)
55
10
Output Voltage Swing (V)
1.5
1
0.5
0
–0.5
–1
–1.5
–2
+125°C
0
5
10
Sinking Current
Quiescent Current (µA)
45
I
Q
35
7
4
–40°C
+25°C
25
2
2.5
3
3.5
4
4.5
5
5.5
Supply Voltage (V)
1
–2.5
15
20
Output Current (mA)
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4
2018 AUG
OPA348/OPA2348/OPA4348
TYPICAL CHARACTERISTICS
(Cont.)
At T
A
= +25°C, R
L
= 100kΩ connected to V
S
/ 2 and V
OUT
= V
S
/ 2, unless otherwise noted.
COMMON-MODE REJECTION vs TEMPERATURE
100
130
OPEN-LOOP GAIN AND PSRR vs TEMPERATURE
A
OL
, R
L
= 100kΩ
Common-Mode Rejection (dB)
90
V– < V
CM
< (V+) – 1.7V
80
V– < V
CM
< V+
70
Open-Loop Gain and
Power Supply Rejection (dB)
120
A
OL
, R
L
= 5kΩ
110
100
90
80
70
60
PSRR
60
50
–75
–50
–25
0
25
50
75
100
125
150
Temperature (°C)
–75
–50
–25
0
25
50
75
100
125
150
Temperature (°C)
QUIESCENT AND SHORT-CIRCUIT CURRENT
vs TEMPERATURE
75
65
16
14
I
SC
55
45
I
Q
35
25
15
–75
–50
–25
0
25
50
75
100
125
150
Temperature (°C)
8
6
4
12
10
10k
INPUT BIAS (I
B
) CURRENT vs TEMPERATURE
Short-Circuit Current (mA)
Quiescent Current (µA)
Input Bias Current (pA)
1k
100
10
1
0.1
–75
–50
–25
0
25
50
75
100
125
150
Temperature (°C)
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
20
18
16
Percent of Amplifiers (%)
OFFSET VOLTAGE DRIFT MAGNITUDE
PRODUCTION DISTRIBUTION
25
Percentage of Amplifiers (%)
Typical production
distribution of
packaged units.
Typical production
distribution of
packaged units.
20
14
12
10
8
6
4
2
0
–6
–5
–4
–3
–2
–1
0
1
2
3
4
5
6
Offset Voltage (mV)
15
10
5
0
1
2
3
4
5
6
7
8
9
10
11
12
Offset Voltage Drift (µV/°C)
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5
2018 AUG
stm32/stm8
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