The LT1413 is a low cost, upgraded version of Linear
Technology’s industry standard LT1013 dual, single supply op amp. The LT1413 is optimized for single 5V applications, although ± 15V specifications are also provided
for completeness.
In the design of the LT1413, particular emphasis has been
placed on low cost plastic and SO-8 package performance:
60µV offset voltage, 0.1nA offset current, in excess of
10mA output current at 330µ A supply current and 140dB
channel separation are some of the specifications achieved.
Other dual, single supply amplifiers are available to
complement the LT1413 family: the micropower LT1078’s
supply current is 10 times lower with a 4.5 fold speed
performance degradation compared to the LT1413. Conversely, the LT1211, LT1213 and LT1215 duals have 4 to
14 times higher supply current, but also 13 to 50 times
higher speed.
Protected by U.S. Patent 4,775,884.
10M
–
INPUT
10M
+
OUTPUT OFFSET =
(INPUT REFERRED =
INPUT RESISTANCE =
BANDWIDTH =
U
O
A
PPLICATITYPICAL
+90V, –3V Common-Mode Range
Difference Amplifier (AV = 1)
10M
9V
1M
1.5mV
125µV)
11M
80kHz
1M
10M
2
3
8
–
1/2 LT1413
+
(THE 0.1nA TYPICAL OFFSET CURRENT
PERMITS THE USE OF 1MΩ RESISTORS)
1
4
OUTPUT
20mV TO 8V
LT1413 • TA03
Distribution of Input Offset Voltage
(In Plastic DIP, N8 Package)
30
VS = 5V, 0V
= 25°C
T
A
25
20
15
10
PERCENT OF UNITS
5
0
–300
–1000100
–200
INPUT OFFSET VOLTAGE (µV)
200300
LT1413 • TA01
1
Page 2
LT1413
A
W
O
LUTEXI T
S
A
WUW
ARB
U
G
I
S
Supply Voltage ..................................................... ±22V
Differential Input Voltage ...................................... ±30V
Input Voltage ..................................................................
Equal to Positive Supply Voltage
5V Below Negative Supply Voltage
Operating Temperature Range ............... – 40°C to 85°C
Storage Temperature Range ................ –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................. 300°C
Note: When the input voltage exceeds the maximum ratings, the input current should be limited
to 10mA.
TOP VIEW
1
+IN A
–
V
2
+IN B
3
–IN B
4
8-LEAD PLASTIC SOIC
NOTE: THIS PIN CONFIGURATION DIFFERS FROM
THE 8-LEAD DIP PIN LOCATIONS. INSTEAD, IT
FOLLOWS THE INDUSTRY STANDARD LT1013DS8
SO PACKAGE CONFIGURATION.
The ● denotes specifications which apply over the full operating
temperature range.
Note 1: Typical parameters are defined as the 60% yield of parameter
distributions of individual amplifiers; i.e., out of 100 LT1413s typically 120
op amps will be better than the indicated specification.
Note 2: This parameter is tested on a sample basis only. All noise
parameters are tested with V
Note 3: This parameter is guaranteed by design and is not tested.
Maximum Output Voltage SwingRL = 2k●±12.2±13.8±11.8±13.8V
Supply Current per Amplifier●370580370630µA
= ±2.5V, VO = 0V.
S
LT1413S8
●140800µV
Note 4: Gain-Bandwidth Product is not tested. It is inferred from the slew
rate measurement.
Note 5: This parameter is not 100% tested.
Note 6: At the minimum supply voltage, the offset voltage changes less
than 200µV compared to its value at 5V, 0V.Note 7: The LT1413 is not tested and is not quality-assurance sampled at
–40°C and at 85°C. These specifications are guaranteed by design,
correlation and/or inference from 0°C, 25°C and/or 70°C tests.
4
Page 5
Y
TEMPERATURE (°C)
0.01
SATURATION VOLTAGE (V)
0.1
10
0100
LT1413 • TA05
50
1
–252575–50
I
SINK
= 10mA
I
SINK
= 5mA
I
SINK
= 1mA
I
SINK
= 100µA
I
SINK
= 10µA
I
SINK
= 0
V+ = 5V TO 30V
V
–
= 0V
INPUT BIAS CURRENT (nA)
COMMON-MODE VOLTAGE (V)
0
15
–10–16
LT1413 • TA08
–15
–4–20–12 –14
10
–10
–6
–5
5
–8
COMMON-MODE VOLTAGE (V)
2
5
–1
4
0
1
3
VS = 5V, 0V
TA = 25°C
VS = ±15V
PICA
LPER
F
O
R
AT
UW
CCHARA TERIST
E
C
LT1413
ICS
Distribution of Input Offset Voltage
(In S8 Package)
30
VS = 5V, 0V
= 25°C
T
A
25
20
15
10
PERCENT OF UNITS
5
0
–400
–2000
–300–100100
INPUT OFFSET VOLTAGE (µV)
200
Input Offset Current vs Temperature
250
200
150
100
INPUT OFFSET CURRENT (pA)
50
0
0–20–406080
20
TEMPERATURE (°C)
5V, 0V
VS =
=
0.1V
V
CM
VS = ±15V
40100
300
LT1413 • TA02
LT1413 • TA06
400
350
300
SUPPLY CURRENT PER AMPLIFIER (µA)
400
–11
–10
–9
–8
INPUT BIAS CURRENT (nA)
–7
Supply Current vs Temperature
VS = ±15V
VS = 5V, 0V
0–25–505075
25100
TEMPERATURE (°C)
LT1413 • TA04
Input Bias Current vs Temperature
5V, 0V
VS =
=
0.1V
V
CM
VS = ±15V
0–20–406080
TEMPERATURE (°C)
40100
20
LT1413 • TA07
Output Saturation vs Sink
Current vs Temperature
Input Bias Current vs
Common-Mode Voltage
0.1Hz to 10Hz Noise
T
= 25°C
A
= ±2V TO ±18V
V
S
NOISE VOLTAGE (200nV/DIV)
42068
TIME (SECONDS)
LT1413 • TA09
VOLTAGE NOISE DENSITY (nV/√Hz)
10
Noise SpectrumMinimum Supply Voltage
1000
300
100
30
CURRENT NOISE DENSITY (fA/√Hz)
10
TA = 25°C
= ±2V TO ±18V
V
S
VOLTAGE NOISE
1/f CORNER 2Hz
1
CURRENT NOISE
101k
FREQUENCY (Hz)
100
LT1413 • TA10
200
100
0
CHANGE IN OFFSET VOLTAGE (µV)
NONFUNCTIONAL
324
POSITIVE SUPPLY VOLTAGE (V)
V– = 0V
T
= –40°C
A
TA = 0°C
TA = 25°C
TA = 85°C
5
LT1413 • TA11
5
Page 6
LT1413
FREQUENCY (Hz)
CHANNEL SEPARATION (dB)
100
160
1k1M
LT1413 • TA14
140
80
10100100k
120
60
10k
RS = 100Ω
RS = 1kΩ
LIMITED BY
THERMAL
INTERACTION
LIMITED BY
PIN TO PIN
CAPACITANCE
TA =
V
S
=
V
IN
=
R
L
=
25°C
5V, 0V
3Vp-p
2k
Y
PICA
140
120
100
80
60
40
VOLTAGE GAIN (dB)
20
0
–20
LPER
Voltage Gain vs Frequency
1100100k
100.10.0110k1M
FREQUENCY (Hz)
R
F
O
25°C
TA =
=
100pF
C
L
VS = ±15V
VS = 5V, 0V
1k10M
AT
LT1413 • TA12
UW
CCHARA TERIST
E
C
Gain, Phase vs Frequency
20
10
GAIN
0
VOLTAGE GAIN (dB)
–10
0.10.33
5V, 0V
ICS
TA = 25°C
= 0.1V
V
CM
= 100pF
PHASE
±15V
FREQUENCY (MHz)
C
L
±15V
5V, 0V
110
80
100
120
140
160
180
200
LT1413 • TA13
Channel Separation vs
Frequency
PHASE SHIFT (DEGREES)
Common-Mode Rejection Ratio
vs Frequency
120
100
80
60
40
20
COMMON-MODE REJECTION RATIO (dB)
0
1001k
1010k100k
FREQUENCY (Hz)
Small Signal Transient
Response, VS = 5V, 0V
50mV/DIV
INPUT = 20mV TO 220mV PULSE
VS = ±15V
VS = 5V, 0V
Power Supply Rejection Ratio
vs Frequency
120
TA = 25°C
LT1413 • TA15
1M
100
80
60
40
20
POWER SUPPLY REJECTION RATIO (dB)
0
0.11k100k
VS = 5V, 0V
NEGATIVE
SUPPLY
±15V
1100
1010k
FREQUENCY (Hz)
TA = 25°C
POSITIVE
SUPPLY
±15V
LT1413 • TA16
1M
Large Signal Transient
Response, VS = 5V, 0V
4V
2V
0V0V
20µs/DIV
LT1413 • TA18LT1413 • TA19LT1413 • TA20
NO LOAD
INPUT = 0V TO 4V PULSE
10µs/DIVAV = +1
Small Signal Transient
Response, VS = ±15V
20mV/DIV
AV = +12µs/DIV
Large Signal Transient
Response, VS = ±15V
5V/DIV
AV = +150µs/DIVAV = +1
LT1413 • TA17
6
Page 7
UUWU
APPLICATIONS INFORMATION
LT1413
Single Supply Operation
The LT1413 is fully specified for single supply operation,
i.e., when the negative supply is 0V. Input common-mode
range includes ground; the output swings within a few
millivolts of ground.
If the input is more than a few hundred millivolts below
ground, two distinct problems can occur on previous
single supply designs, such as the LM124, LM158, OP-21
and OP-221.
a) When the input is more than a diode drop below
ground, unlimited current will flow from the substrate
(V– terminal) to the input. This can destroy the unit. On
the LT1413, the 400Ω resistors, in series with the input
(see Schematic Diagram), protect the devices even when
the input is 5V below ground.
b) When the input is more than 400mV below ground
(at 25°C), the input stage saturates (transistors Q3 and
Q4) and phase reversal occurs at the output. This can
cause lock-up in servo systems. Due to a unique phase
reversal protection circuitry (Q21, Q22, Q27, Q28), the
LT1413 outputs do not reverse, as illustrated below,
even when the inputs are at –1.5V. Keep the output of the
other amplifier out of negative saturation for the phase
reversal protection to function properly.
Since the output of the LT1413 cannot go exactly to
ground, but can only approach ground to within a few
millivolts, care should be exercised to ensure that the
output is not saturated. For example, a 1mV input signal
will cause the amplifier to set up in its linear region
in the gain 100 configuration shown below, but is not
enough to make the amplifier function properly in the
voltage-follower mode.
Gain 100 AmplifierVoltage Follower
R
1mV
5V
99R
–
100mV
+
1mV
5V
–
+
OUTPUT
SATURATED
≈ 15mV
LT1413 • 27
Figure 1.
Comparator Applications
The single supply operation of the LT1413 lends itself to
its use as a precision comparator with TTL compatible
output; the response time is shown below.
Voltage Follower with Input Exceeding the Negative Common-Mode Range
4V
2V
0V
6V
INPUT, –1.5V TO 4.5V
P-P
LT1413 • TA21
Comparator Rise Response Time
10mV, 5mV, 2mV Overdrives
4
2
0
0
INPUT (mV)OUTPUT (V)
–100
= 5V, 0V50µs/DIV
V
S
4V
2V
0V
LM324, LM358, OP-221
EXHIBIT OUTPUT PHASE REVERSAL
LT1413 • TA24
LT1413 • TA22
Comparator Fall Response Time
to 10mV, 5mV, 2mV Overdrives
4
2
0
100
INPUT (mV)OUTPUT (V)
0
V
= 5V, 0V50µs/DIV
S
4V
2V
0V
LT1413
NO PHASE REVERSAL
LT1413 • TA25
LT1413 • TA23
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
7
Page 8
LT1413
N8 0392
0.045 ± 0.015
(1.143 ± 0.381)
0.100 ± 0.010
(2.540 ± 0.254)
0.065
(1.651)
TYP
0.045 – 0.065
(1.143 – 1.651)
0.130 ± 0.005
(3.302 ± 0.127)
0.020
(0.508)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.125
(3.175)
MIN
12
3
4
876
5
0.250 ± 0.010
(6.350 ± 0.254)
0.400
(10.160)
MAX
0.009 – 0.015
(0.229 – 0.381)
0.300 – 0.320
(7.620 – 8.128)
0.325
+0.025
–0.015
+0.635
–0.381
8.255
()
W
W
SIMPLIFIED SCHEMATIC
+
V
Q3
Q27
Q2
Q28
Q12
Q29
Q11
IN–
IN+
Q1
400Ω
Q21
400Ω
Q22
1/2 LT1413
1k
80µA11µA11µA10µA3.5µA3.5µA
Q32
Q33
OUTPUT
Q34
Q35
J1
16k18Ω2.4k
600Ω
Q30
Q6
Q4
3.9k
Q5
Q10
21pF
2.5pF
Q18
Q19
Q25
Q26
4pF
Q31
2k
Q17
800Ω
–
V
Q15Q14
Q36
Q16
Q8
Q9
–
V
75pF
Q7
5k
10pF
5k
U
PACKAGE DESCRIPTION
S8 Package, 8-Lead Plastic SOIC
0.010 – 0.020
(0.254 – 0.508)
0°– 8° TYP
8
0.016 – 0.050
0.406 – 1.270
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7487
(408) 432-1900
●
FAX
: (408) 434-0507
× 45°
0.008 – 0.010
(0.203 – 0.254)
0.053 – 0.069
(1.346 – 1.752)
0.014 – 0.019
(0.355 – 0.483)
●
TELEX
: 499-3977
15µA
15µA18µA
N8 Package, 8-Lead Plastic DIP
0.004 – 0.010
(0.101 – 0.254)
0.050
(1.270)
BSC
Q24100pF
30Ω
0.228 – 0.244
(5.791 – 6.197)
48k
600Ω
0.189 – 0.197
(4.801 – 5.004)
7
8
1
2
BA/GP 1193 10K REV 0 • PRINTED IN USA
LINEAR TECHNOLOGY CORP ORATION 1993
600Ω
LT1413 • TA26
5
6
3
4
0.150 – 0.157
(3.810 – 3.988)
SO8 0392
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