Linear LT1812 Dual and quad 25mhz, 600v/s op amp Datasheet

LT1358/LT1359
Dual and Quad
25MHz, 600V/µs Op Amps
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FEATURES
DESCRIPTIO
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The LT1358/LT1359 are dual and quad low power high
speed operational amplifiers with outstanding AC and DC
performance. The amplifiers feature much lower supply
current and higher slew rate than devices with comparable
bandwidth. The circuit topology is a voltage feedback
amplifier with matched high impedance inputs and the
slewing performance of a current feedback amplifier. The
high slew rate and single stage design provide excellent
settling characteristics which make the circuit an ideal
choice for data acquisition systems. Each output drives a
500Ω load to ±12.5V with ±15V supplies and a 150Ω load
to ±3V on ±5V supplies. The amplifiers are stable with any
capacitive load making them useful in buffer applications.
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25MHz Gain Bandwidth
600V/µs Slew Rate
2.5mA Maximum Supply Current per Amplifier
Unity-Gain Stable
C-LoadTM Op Amp Drives All Capacitive Loads
8nV/√Hz Input Noise Voltage
600µV Maximum Input Offset Voltage
500nA Maximum Input Bias Current
120nA Maximum Input Offset Current
20V/mV Minimum DC Gain, RL=1k
115ns Settling Time to 0.1%, 10V Step
220ns Settling Time to 0.01%, 10V Step
±12.5V Minimum Output Swing into 500Ω
±3V Minimum Output Swing into 150Ω
Specified at ±2.5V, ±5V, and ±15V
LT1358 is Available in 8-Pin PDIP and SO Packages
LT1359 is Available in 14-Pin PDIP, 14-Pin and
16-Pin SO Packages
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APPLICATIO S
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Wideband Amplifiers
Buffers
Active Filters
Data Acquisition Systems
Photodiode Amplifiers
The LT1358/LT1359 are members of a family of fast, high
performance amplifiers using this unique topology and
employing Linear Technology Corporation’s advanced
bipolar complementary processing. For a single amplifier
version of the LT1358/LT1359 see the LT1357 data sheet.
For higher bandwidth devices with higher supply currents
see the LT1360 through LT1365 data sheets. For lower
supply current amplifiers see the LT1354 and LT1355/
LT1356 data sheets. Singles, duals, and quads of each
amplifier are available.
, LTC and LT are registered trademarks of Linear Technology Corporation.
C-Load is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
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TYPICAL APPLICATIO
AV = –1 Large-Signal Response
DAC I-to-V Converter
6pF
DAC
INPUTS
12
5k
–
1/2
LT1358
565A-TYPE
VOUT
+
0.1µF
5k
VOS + I OS ( 5kΩ )+
VOUT
< 1LSB
A VOL
135859 TA01
135859 TA02
135859fb
1
LT1358/LT1359
U
W W
W
ABSOLUTE
AXI U
RATI GS
(Note 1)
Total Supply Voltage (V+ to V –) ............................... 36V
Differential Input Voltage
(Transient Only) (Note 2)................................... ±10V
Input Voltage ............................................................ ±VS
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 7) ...–40°C to 85°C
Specified Temperature Range (Note 8) ....–40°C to 85°C
Maximum Junction Temperature (See Below)
Plastic Package ................................................ 150°C
Storage Temperature Range ..................–65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
U
U
W
PACKAGE/ORDER I FOR ATIO
TOP VIEW
TOP VIEW
OUT A
1
–IN A
2
8
V+
7
OUT A
1
OUT B
–IN A
2
3
V–
4
B
6
–IN B
+IN A
3
5
+IN B
V–
4
V+
7
OUT B
6
–IN B
5
+IN B
A
A
+IN A
8
B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 190°C/ W
N8 PACKAGE
8-LEAD PDIP
TJMAX = 150°C, θJA = 130°C/ W
ORDER PART NUMBER
ORDER PART NUMBER
S8 PART MARKING
LT1358CN8
LT1358IN8
LT1358CS8
LT1358IS8
1358
1358I
TOP VIEW
TOP VIEW
OUT A
1
TOP VIEW
16 OUT D
OUT A
1
14 OUT D
–IN A
2
–IN A
2
13 –IN D
+IN A
3
+IN A
3
12 +IN D
V+
4
13 V
+IN A
3
V+
4
+IN B
5
12 +IN C
V+
4
11 –IN C
+IN B
5
+IN B
A
D
11 V –
10 +IN C
5
–IN B
6
OUT B
7
B
C
–IN B
6
A
B
D
15 –IN D
OUT A
1
14 +IN D
–IN A
2
–
C
9
–IN C
OUT B
7
10 OUT C
8
OUT C
NC
8
9
N PACKAGE
14-LEAD PDIP
NC
S PACKAGE
16-LEAD PLASTIC SO
–IN B
6
OUT B
7
14 OUT D
13 –IN D
A
D
12 +IN D
11 V –
10 +IN C
B
C
9
–IN C
8
OUT C
S PACKAGE
14-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 110°C/ W
TJMAX = 150°C, θJA = 150°C/ W
TJMAX = 150°C, θJA = 160°C/ W
ORDER PART NUMBER
ORDER PART NUMBER
ORDER PART NUMBER
LT1359CN
LT1359IN
LT1359CS
LT1359IS
LT1359CS14
LT1359IS14
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
*The temperature grade is identified by a label on the shipping container. Consult LTC Marketing for parts specified with wider operating temperature ranges.
135859fb
2
LT1358/LT1359
ELECTRICAL CHARACTERISTICS
TA = 25°C, VCM = 0V unless otherwise noted.
SYMBOL
PARAMETER
VOS
Input Offset Voltage
±15V
±5V
±2.5V
IOS
Input Offset Current
±2.5V to ±15V
40
120
nA
IB
Input Bias Current
±2.5V to ±15V
120
500
nA
en
Input Noise Voltage
f = 10kHz
±2.5V to ±15V
8
nV/√Hz
in
Input Noise Current
f = 10kHz
±2.5V to ±15V
0.8
pA/√Hz
RIN
Input Resistance
VCM = ±12V
±15V
80
MΩ
Input Resistance
Differential
±15V
6
MΩ
±15V
3
pF
13.4
3.5
1.1
V
V
V
CIN
CONDITIONS
Input Capacitance
VSUPPLY
Range +
±15V
±5V
±2.5V
Input Voltage Range –
±15V
±5V
±2.5V
Input Voltage
CMRR
Common Mode Rejection Ratio
VCM = ±12V
VCM = ±2.5V
VCM = ±0.5V
PSRR
Power Supply Rejection Ratio
VS = ±2.5V to ±15V
AVOL
Large-Signal Voltage Gain
VOUT = ±12V, RL = 1k
VOUT = ±10V, RL = 500Ω
VOUT = ±2.5V, RL = 1k
VOUT = ±2.5V, RL = 500Ω
VOUT = ±2.5V, RL = 150Ω
VOUT = ±1V, RL = 500Ω
VOUT
Output Swing
IOUT
±15V
±5V
±2.5V
MIN
35
12.0
2.5
0.5
TYP
MAX
UNITS
0.2
0.2
0.3
0.6
0.6
0.8
mV
mV
mV
–13.2 –12.0
–3.3 –2.5
–0.9 –0.5
V
V
V
83
78
68
97
84
75
dB
dB
dB
92
106
dB
±15V
±15V
±5V
±5V
±5V
±2.5V
20
7
20
7
1.5
7
65
25
45
25
6
30
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
RL = 1k, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 150Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
±15V
±15V
±5V
±5V
±2.5V
13.3
12.5
3.5
3.0
1.3
13.8
13.0
4.0
3.3
1.7
±V
±V
±V
±V
±V
Output Current
VOUT = ±12.5V
VOUT = ±3V
±15V
±5V
25
20
30
25
mA
mA
ISC
Short-Circuit Current
VOUT = 0V, VIN = ±3V
±15V
30
42
mA
SR
Slew Rate
AV = – 2, (Note 4)
±15V
±5V
300
150
600
220
V/µs
V/µs
Full Power Bandwidth
10V Peak, (Note 5)
3V Peak, (Note 5)
±15V
±5V
9.6
11.7
MHz
MHz
GBW
Gain Bandwidth
f = 200kHz, RL = 2k
±15V
±5V
±2.5V
25
22
20
MHz
MHz
MHz
tr, tf
Rise Time, Fall Time
AV = 1, 10%-90%, 0.1V
±15V
±5V
8
9
ns
ns
Overshoot
AV = 1, 0.1V
±15V
±5V
27
27
%
%
Propagation Delay
50% VIN to 50% VOUT, 0.1V
±15V
±5V
9
11
ns
ns
Settling Time
10V Step, 0.1%, AV = –1
10V Step, 0.01%, AV = –1
5V Step, 0.1%, AV = –1
5V Step, 0.01%, AV = –1
±15V
±15V
±5V
±5V
115
220
110
380
ns
ns
ns
ns
ts
18
15
135859fb
3
LT1358/LT1359
ELECTRICAL CHARACTERISTICS
SYMBOL
RO
IS
PARAMETER
CONDITIONS
VSUPPLY
Differential Gain
f = 3.58MHz, AV = 2, RL = 1k
±15V
±5V
0.1
0.1
%
%
Differential Phase
f = 3.58MHz, AV = 2, RL = 1k
±15V
±5V
0.50
0.35
Deg
Deg
Output Resistance
AV = 1, f = 100kHz
±15V
0.3
Ω
Channel Separation
VOUT = ±10V, RL = 500Ω
±15V
Supply Current
Each Amplifier
Each Amplifier
±15V
±5V
ELECTRICAL CHARACTERISTICS
0°C ≤ TA ≤ 70°C, VCM = 0V unless otherwise noted.
SYMBOL
PARAMETER
VOS
Input Offset Voltage
Input VOS Drift
IOS
TA = 25°C, VCM = 0V unless otherwise noted.
MIN
100
TYP
MAX
UNITS
113
2.0
1.9
dB
2.5
2.4
mA
mA
The ● denotes the specifications which apply over the temperature range
CONDITIONS
(Note 6)
Input Offset Current
VSUPPLY
MIN
TYP
MAX
UNITS
0.8
0.8
1.0
mV
mV
mV
±15V
±5V
±2.5V
●
●
●
±2.5V to ±15V
●
±2.5V to ±15V
●
±2.5V to ±15V
●
±15V
±5V
±2.5V
●
●
●
81
77
67
dB
dB
dB
●
90
dB
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
5
8
180
nA
IB
Input Bias Current
CMRR
Common Mode Rejection Ratio
VCM = ±12V
VCM = ±2.5V
VCM = ±0.5V
PSRR
Power Supply Rejection Ratio
VS = ±2.5V to ±15V
AVOL
Large-Signal Voltage Gain
VOUT = ±12V, RL = 1k
VOUT = ±10V, RL = 500Ω
VOUT = ±2.5V, RL = 1k
VOUT = ±2.5V, RL = 500Ω
VOUT = ±2.5V, RL = 150Ω
VOUT = ±1V, RL = 500Ω
±15V
±15V
±5V
±5V
±5V
±2.5V
●
●
●
●
●
●
15
5
15
5
1
5
VOUT
Output Swing
RL = 1k, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 150Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
±15V
±15V
±5V
±5V
±2.5V
●
●
●
●
●
13.2
12.2
3.4
2.8
1.2
±V
±V
±V
±V
±V
IOUT
Output Current
VOUT = ±12.2V
VOUT = ±2.8V
±15V
±5V
●
●
24.4
18.7
mA
mA
ISC
Short-Circuit Current
VOUT = 0V, VIN = ± 3V
±15V
●
25
mA
SR
Slew Rate
AV = – 2, (Note 4)
±15V
±5V
●
●
225
125
V/µs
V/µs
GBW
Gain Bandwidth
f = 200kHz, RL = 2k
±15V
±5V
●
●
15
12
MHz
MHz
Channel Separation
VOUT = ±10V, RL = 500Ω
±15V
●
98
dB
Supply Current
Each Amplifier
Each Amplifier
±15V
±5V
●
●
IS
750
µV/°C
2.9
2.8
nA
mA
mA
135859fb
4
LT1358/LT1359
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the temperature range –
40°C ≤ TA ≤ 85°C, VCM = 0V unless otherwise noted. (Note 8)
SYMBOL
VOS
IOS
PARAMETER
Input Offset Voltage
CONDITIONS
Input VOS Drift
(Note 6)
Input Offset Current
IB
Input Bias Current
CMRR
Common Mode Rejection Ratio
VCM = ±12V
VCM = ±2.5V
VCM = ±0.5V
VSUPPLY
±15V
± 5V
± 2.5V
MIN
●
●
●
± 2.5V to ±15V
●
± 2.5V to ±15V
●
± 2.5V to ±15V
●
±15V
± 5V
± 2.5V
●
●
●
TYP
5
MAX
1.3
1.3
1.5
UNITS
mV
mV
mV
8
µV/°C
300
900
80
76
66
nA
nA
dB
dB
dB
PSRR
Power Supply Rejection Ratio
VS = ±2.5V to ±15V
●
90
dB
AVOL
Large-Signal Voltage Gain
VOUT = ±12V, RL = 1k
VOUT = ±10V, RL = 500Ω
VOUT = ±2.5V, RL = 1k
VOUT = ±2.5V, RL = 500Ω
VOUT = ±2.5V, RL = 150Ω
VOUT = ±1V, RL = 500Ω
±15V
±15V
±5V
±5V
±5V
±2.5V
●
●
●
●
●
●
10.0
2.5
10.0
2.5
0.6
2.5
V/mV
V/mV
V/mV
V/mV
V/mV
V/mV
VOUT
Output Swing
RL = 1k, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
RL = 150Ω, VIN = ±40mV
RL = 500Ω, VIN = ±40mV
±15V
±15V
±5V
±5V
±2.5V
●
●
●
●
●
13.0
12.0
3.4
2.6
1.2
±V
±V
±V
±V
±V
IOUT
Output Current
VOUT = ±12V
VOUT = ±2.6V
±15V
±5V
●
●
24.0
17.3
mA
mA
ISC
Short-Circuit Current
VOUT = 0V, VIN = ±3V
±15V
●
24
mA
SR
Slew Rate
AV = – 2, (Note 4)
±15V
±5V
●
●
180
100
V/µs
V/µs
GBW
Gain Bandwidth
f = 200kHz, RL = 2k
±15V
±5V
●
●
14
11
MHz
MHz
Channel Separation
VOUT = ±10V, RL = 500Ω
±15V
●
98
dB
Supply Current
Each Amplifier
Each Amplifier
±15V
±5V
●
●
IS
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Differential inputs of ±10V are appropriate for transient operation
only, such as during slewing. Large, sustained differential inputs will cause
excessive power dissipation and may damage the part. See Input
Considerations in the Applications Information section of this data sheet
for more details.
Note 3: A heat sink may be required to keep the junction temperature
below absolute maximum when the output is shorted indefinitely.
Note 4: Slew rate is measured between ±10V on the output with ±6V input
for ±15V supplies and ±1V on the output with ±1.75V input for ±5V
supplies.
3.0
2.9
mA
mA
Note 5: Full power bandwidth is calculated from the slew rate
measurement: FPBW = (SR)/2πVP.
Note 6: This parameter is not 100% tested.
Note 7. The LT1358C/LT1359C and LT1358I/LT1359I are guaranteed
functional over the operating temperature range of –40°C to 85°C.
Note 8: The LT1358C/LT1359C are guaranteed to meet specified
performance from 0°C to 70°C. The LT1358C/LT1359C are designed,
characterized and expected to meet specified performance from – 40°C to
85°C, but are not tested or QA sampled at these temperatures. The
LT1358I/LT1359I are guaranteed to meet specified performance from
– 40°C to 85°C.
135859fb
5
LT1358/LT1359
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Supply Voltage
and Temperature
Input Common Mode Range vs
Supply Voltage
V+
3.0
400
TA = 25°C
∆VOS < 1mV
–0.5
125°C
2.0
25°C
–55°C
1.5
1.0
VS = ±15V
TA = 25°C
IB + + I B –
IB = ————
2
300
–1.0
INPUT BIAS CURRENT (nA)
COMMON MODE RANGE (V)
2.5
SUPPLY CURRENT (mA)
Input Bias Current vs
Input Common Mode Voltage
–1.5
–2.0
2.0
1.5
1.0
200
100
0
–100
0.5
V–
0
5
10
15
SUPPLY VOLTAGE (±V)
20
0
135859 G01
INPUT VOLTAGE NOISE (nV/ Hz)
INPUT BIAS CURRENT (nA)
250
200
150
100
100
10
VS = ±15V
TA = 25°C
AV = 101
RS = 100k
TA = 25°C
en
10
1
in
INPUT CURRENT NOISE (pA/ Hz)
300
15
Open-Loop Gain vs
Resistive Load
100
⏐ ⏐
350
–10
–5
0
5
10
INPUT COMMON MODE VOLTAGE (V)
135859 G03
Input Noise Spectral Density
VS = ±15V
IB+ + IB–
IB = ————
2
400
–200
–15
20
135859 G02
Input Bias Current vs
Temperature
450
5
10
15
SUPPLY VOLTAGE (±V)
VS = ±15V
VS = ±5V
90
OPEN-LOOP GAIN (dB)
0.5
80
70
60
50
–25
0
25
50
75
TEMPERATURE (°C)
100
10
100
1k
10k
FREQUENCY (Hz)
135859 G04
–1
97
96
95
–2
–1.0
–3
3
RL = 500Ω
2
RL = 1k
0
25
50
75
TEMPERATURE (°C)
100
125
135859 G07
0
5
10
15
SUPPLY VOLTAGE (±V)
VS = ±5V
VIN = 100mV
85°C
–40°C
–1.5
–2.0
–2.5
25°C
25°C
2.5
85°C
2.0
–40°C
1.5
1.0
V–
–25
135859 G06
RL = 1k
RL = 500Ω
1
94
10k
V + –0.5
TA = 25°C
98
100
1k
LOAD RESISTANCE (Ω)
Output Voltage Swing vs
Load Current
V+
VS = ±15V
RL = 1k
VO = ±12V
99
93
– 50
10
Output Voltage Swing vs
Supply Voltage
OUTPUT VOLTAGE SWING (V)
OPEN-LOOP GAIN (dB)
100
50
135859 G05
Open-Loop Gain vs Temperature
101
0.1
100k
1
125
OUTPUT VOLTAGE SWING (V)
0
– 50
20
135859 G08
V – +0.5
–50 –40 –30 –20 –10 0 10 20 30 40 50
OUTPUT CURRENT (mA)
135859 G09
135859fb
6
LT1358/LT1359
U W
TYPICAL PERFOR A CE CHARACTERISTICS
Settling Time vs Output Step
(Noninverting)
Output Short-Circuit Current vs
Temperature
OUTPUT SHORT-CIRCUIT CURRENT (mA)
65
Settling Time vs Output Step
(Inverting)
10
10
VS = ±5V
60
VS = ±15V
AV = 1
10mV
8
8
50
45
SINK
40
SOURCE
35
1mV
4
2
0
–2
–4
0
25
50
75
TEMPERATURE (°C)
100
125
50
Gain Bandwidth and Phase
Margin vs Supply Voltage
38
10
VS = ±15V
TA = 25°C
AV = –1
AV = 10
10
AV = 1
1
0.1
6
C = 1000pF
C = 100pF
2
0
C = 50pF
–2
–4
C=0
–6
4
46
3
30
42
28
40
GAIN BANDWIDTH
VS = ±15V
22
20
GAIN BANDWIDTH
VS = ±5V
18
– 50
–25
0
25
50
75
TEMPERATURE (°C)
24
36
100
38
36
135859 G16
2
32
30
5
10
15
SUPPLY VOLTAGE (±V)
Frequency Response vs
Supply Voltage (AV = –1)
5
TA = 25°C
AV = 1
RL = 2k
4
3
±15V
–1
–3
32
–4
–5
100k
±5V
1
0
–1
–2
–3
±2.5V
1M
10M
FREQUENCY (Hz)
TA = 25°C
AV = –1
RF = RG = 2k
2
0
–2
20
135859 G15
1
34
30
125
34
GAIN BANDWIDTH
0
GAIN (dB)
44
GAIN (dB)
PHASE MARGIN
VS = ±5V
48
PHASE MARGIN (DEG)
GAIN BANDWIDTH (MHz)
34
24
38
100M
5
50
26
40
26
Frequency Response vs
Supply Voltage (AV = 1)
PHASE MARGIN
VS = ±15V
32
42
28
135859 G19
Gain Bandwidth and Phase
Margin vs Temperature
36
30
18
1M
10M
FREQUENCY (Hz)
135859 G13
38
44
20
–10
100k
100M
1M
10M
FREQUENCY (Hz)
46
PHASE MARGIN
32
22
–8
100k
48
TA = 25°C
34
C = 500pF
4
50
36
GAIN BANDWIDTH (MHz)
VOLTAGE MAGNITUDE (dB)
8
AV = 100
250
135859 G12
Frequency Response vs
Capacitive Load
VS = ±15V
TA = 25°C
0.01
10k
100
150
200
SETTLING TIME (ns)
PHASE MARGIN (DEG)
OUTPUT IMPEDANCE (Ω)
50
250
135859 G11
Output Impedance vs Frequency
100
10mV
–4
–10
100
150
200
SETTLING TIME (ns)
135859 G10
1k
VS = ±15V
AV = –1
0
–2
–8
10mV
–10
–25
2
–6
1mV
–8
25
– 50
1mV
4
1mV
–6
30
OUTPUT SWING (V)
OUTPUT SWING (V)
55
10mV
6
6
–4
100M
135859 G17
–5
100k
±15V
±5V
±2.5V
1M
10M
FREQUENCY (Hz)
100M
135859 G18
135859fb
7
LT1358/LT1359
U W
TYPICAL PERFOR A CE CHARACTERISTICS
120
VS = ±15V
40
GAIN
30
60
VS = ±5V
40
VS = ±5V
20
20
10
0
TA = 25°C
AV = –1
RF = RG = 2k
0
–10
10k
100k
10M
1M
FREQUENCY (Hz)
POWER SUPPLY REJECTION RATIO (dB)
80
PHASE (DEG)
VS = ±15V
50
GAIN (dB)
100
PHASE
120
100
+PSRR
– PSRR
80
60
40
20
0
100
100M
VS = ±15V
TA = 25°C
Slew Rate vs Supply Voltage
10k 100k
1M
FREQUENCY (Hz)
10M
40
20
1k
100k
1M
FREQUENCY (Hz)
10M
200
100M
Slew Rate vs Input Level
1000
800
SLEW RATE (V/µs)
AV = –2
SR+ + SR–
SR = —————
2
400
TA = 25°C
VS = ±15V
AV = –1
RF = RG = 2k
SR+ + SR –
SR = —————
2
900
VS = ±15V
500
400
10k
135859 G21
Slew Rate vs Temperature
SLEW RATE (V/µs)
600
60
100M
600
800
80
135859 G20
1000
TA = 25°C
AV = –1
RF = RG = 2k
SR+ + SR–
SR = —————
2
VS = ±15V
TA = 25°C
100
0
1k
135859 G14
SLEW RATE (V/µs)
COMMON-MODE REJECTION RATIO (dB)
70
60
Common Mode Rejection Ratio
vs Frequency
Power Supply Rejection Ratio
vs Frequency
Gain and Phase vs Frequency
300
200
VS = ±5V
700
600
500
400
300
200
100
100
0
0
5
10
SUPPLY VOLTAGE (±V)
0
– 50
15
0
–25
0
25
50
75
TEMPERATURE (°C)
100
135859 G22
6 8 10 12 14 16 18
INPUT LEVEL (VP-P)
20
Undistorted Output Swing vs
Frequency (±5V)
10
30
AV = –1
TA = 25°C
VO = 3VRMS
RL = 2k
AV = –1
0.001
AV = 1
AV = 1
20
15
10
5
1k
10k
FREQUENCY (Hz)
100k
135859 G25
OUTPUT VOLTAGE (VP-P)
25
OUTPUT VOLTAGE (VP-P)
TOTAL HARMONIC DISTORTION (%)
4
135859 G24
Undistorted Output Swing vs
Frequency (±15V)
0.01
100
2
135859 G23
Total Harmonic Distortion
vs Frequency
0.0001
10
0
125
VS = ±15V
RL = 2k
AV = 1, 1% MAX DISTORTION
AV = –1, 2% MAX DISTORTION
0
100k
1M
FREQUENCY (Hz)
AV = 1
6
4
2
10M
135859 G26
AV = –1
8
VS = ±5V
RL = 2k
2% MAX DISTORTION
0
100k
1M
FREQUENCY (Hz)
10M
135859 G27
135859fb
8
LT1358/LT1359
U W
TYPICAL PERFOR A CE CHARACTERISTICS
2nd and 3rd Harmonic Distortion
vs Frequency
Crosstalk vs Frequency
VS = ±15V
VO = 2VP-P
RL = 2k
AV = 2
– 60
–50
–60
–70
2ND HARMONIC
TA = 25°C
VS = ±15V
TA = 25°C
VIN = 0dBm
RL = 500Ω
AV = 1
– 50
3RD HARMONIC
OVERSHOOT (%)
–40
Capacitive Load Handling
100
– 40
CROSSTALK (dB)
HARMONIC DISTORTION (dB)
–30
– 70
– 80
– 90
AV = 1
50
AV = –1
–100
–80
–110
–90
100k 200k
400k
1M 2M
FREQUENCY (Hz)
4M
10M
–120
100k
1M
10M
FREQUENCY (Hz)
135859 G28
Small-Signal Transient
(AV = 1)
100M
135859 G31
1000p 0.01µ
0.1µ
CAPACITIVE LOAD (F)
1µ
135859 G30
Small-Signal Transient
(AV = –1, CL = 1000pF)
135859 G33
135859 G32
Large-Signal Transient
(AV = 1, CL = 10,000pF)
Large-Signal Transient
(AV = –1)
135859 G34
100p
135859 G29
Small-Signal Transient
(AV = –1)
Large-Signal Transient
(AV = 1)
0
10p
135859 G35
135859 G36
135859fb
9
LT1358/LT1359
U
W
U U
APPLICATIO S I FOR ATIO
Layout and Passive Components
Input Considerations
The LT1358/LT1359 amplifiers are easy to use and tolerant of less than ideal layouts. For maximum performance
(for example, fast 0.01% settling) use a ground plane,
short lead lengths, and RF-quality bypass capacitors
(0.01µF to 0.1µF). For high drive current applications use
low ESR bypass capacitors (1µF to 10µF tantalum).
Each of the LT1358/LT1359 inputs is the base of an NPN
and a PNP transistor whose base currents are of opposite
polarity and provide first-order bias current cancellation.
Because of variation in the matching of NPN and PNP beta,
the polarity of the input bias current can be positive or
negative. The offset current does not depend on NPN/PNP
beta matching and is well controlled. The use of balanced
source resistance at each input is recommended for
applications where DC accuracy must be maximized.
The parallel combination of the feedback resistor and gain
setting resistor on the inverting input combine with the
input capacitance to form a pole which can cause peaking
or oscillations. If feedback resistors greater than 5k are
used, a parallel capacitor of value
CF > RG x CIN / RF
should be used to cancel the input pole and optimize
dynamic performance. For unity-gain applications where
a large feedback resistor is used, CF should be greater than
or equal to CIN.
Capacitive Loading
The LT1358/LT1359 are stable with any capacitive load.
As the capacitive load increases, both the bandwidth and
phase margin decrease so there will be peaking in the
frequency domain and in the transient response. Coaxial
cable can be driven directly, but for best pulse fidelity a
resistor of value equal to the characteristic impedance of
the cable (i.e., 75Ω) should be placed in series with the
output. The other end of the cable should be terminated
with the same value resistor to ground.
The inputs can withstand transient differential input voltages up to 10V without damage and need no clamping or
source resistance for protection. Differential inputs, however, generate large supply currents (tens of mA) as
required for high slew rates. If the device is used with
sustained differential inputs, the average supply current
will increase, excessive power dissipation will result and
the part may be damaged. The part should not be used
as a comparator, peak detector or other open-loop
application with large, sustained differential inputs.
Under normal, closed-loop operation, an increase of power
dissipation is only noticeable in applications with large
slewing outputs and is proportional to the magnitude of
the differential input voltage and the percent of the time
that the inputs are apart. Measure the average supply
current for the application in order to calculate the power
dissipation.
135859fb
10
LT1358/LT1359
U
W
U U
APPLICATIO S I FOR ATIO
Circuit Operation
Power Dissipation
The LT1358/LT1359 circuit topology is a true voltage
feedback amplifier that has the slewing behavior of a
current feedback amplifier. The operation of the circuit can
be understood by referring to the simplified schematic.
The inputs are buffered by complementary NPN and PNP
emitter followers which drive a 500Ω resistor. The input
voltage appears across the resistor generating currents
which are mirrored into the high impedance node. Complementary followers form an output stage which buffers the
gain node from the load. The bandwidth is set by the input
resistor and the capacitance on the high impedance node.
The slew rate is determined by the current available to
charge the gain node capacitance. This current is the
differential input voltage divided by R1, so the slew rate is
proportional to the input. Highest slew rates are therefore
seen in the lowest gain configurations. For example, a 10V
output step in a gain of 10 has only a 1V input step,
whereas the same output step in unity gain has a 10 times
greater input step. The curve of Slew Rate vs Input Level
illustrates this relationship. The LT1358/LT1359 are tested
for slew rate in a gain of –2 so higher slew rates can be
expected in gains of 1 and –1, and lower slew rates in
higher gain configurations.
The LT1358/LT1359 combine high speed and large output
drive in small packages. Because of the wide supply
voltage range, it is possible to exceed the maximum
junction temperature under certain conditions. Maximum
junction temperature (TJ) is calculated from the ambient
temperature (TA) and power dissipation (PD) as follows:
The RC network across the output stage is bootstrapped
when the amplifier is driving a light or moderate load and
has no effect under normal operation. When driving a
capacitive load (or a low value resistive load) the network
is incompletely bootstrapped and adds to the compensation at the high impedance node. The added capacitance
slows down the amplifier which improves the phase
margin by moving the unity-gain frequency away from the
pole formed by the output impedance and the capacitive
load. The zero created by the RC combination adds phase
to ensure that even for very large load capacitances, the
total phase lag can never exceed 180 degrees (zero phase
margin) and the amplifier remains stable.
LT1358N8:
LT1358S8:
LT1359N:
LT1359S:
LT1359S14:
TJ = TA + (PD x 130°C/W)
TJ = TA + (PD x 190°C/W)
TJ = TA + (PD x 110°C/W)
TJ = TA + (PD x 150°C/W)
TJ = TA + (PD x 160°C/W)
Worst case power dissipation occurs at the maximum
supply current and when the output voltage is at 1/2 of
either supply voltage (or the maximum swing if less than
1/2 supply voltage). For each amplifier PDMAX is:
PDMAX = (V+ – V–)(ISMAX) + (V+/2)2/RL
Example: LT1358 in S8 at 70°C, VS = ±15V, RL = 500Ω
PDMAX = (30V)(2.9mA) + (7.5V)2/500Ω = 200mW
TJMAX = 70°C + (2 x 200mW)(190°C/W) = 146°C
135859fb
11
LT1358/LT1359
W
W
SI PLIFIED SCHE ATIC
V+
R1
500Ω
+IN
RC
OUT
–IN
C
V–
CC
135859 SS01
135859fb
12
LT1358/LT1359
U
PACKAGE DESCRIPTIO
Dimension in inches (millimeters) unless otherwise noted.
N8 Package
8-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.400*
(10.160)
MAX
8
7
6
5
1
2
3
4
0.255 ± 0.015*
(6.477 ± 0.381)
0.300 – 0.325
(7.620 – 8.255)
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
(
+0.035
0.325 –0.015
8.255
+0.889
–0.381
0.130 ± 0.005
(3.302 ± 0.127)
0.045 – 0.065
(1.143 – 1.651)
)
0.125
(3.175) 0.020
MIN
(0.508)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
0.100
(2.54)
BSC
N8 1098
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
N Package
14-Lead PDIP (Narrow 0.300)
(LTC DWG # 05-08-1510)
0.770*
(19.558)
MAX
14
13
12
11
10
9
8
1
2
3
4
5
6
7
0.255 ± 0.015*
(6.477 ± 0.381)
0.130 ± 0.005
(3.302 ± 0.127)
0.300 – 0.325
(7.620 – 8.255)
0.045 – 0.065
(1.143 – 1.651)
0.020
(0.508)
MIN
0.065
(1.651)
TYP
0.009 – 0.015
(0.229 – 0.381)
+0.035
0.325 –0.015
0.005
(0.125)
MIN 0.100
(2.54)
*THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
BSC
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH (0.254mm)
(
+0.889
8.255
–0.381
)
0.125
(3.175)
MIN
0.018 ± 0.003
(0.457 ± 0.076)
N14 1098
135859fb
13
LT1358/LT1359
U
PACKAGE DESCRIPTIO
Dimension in inches (millimeters) unless otherwise noted.
S8 Package
8-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.189 – 0.197*
(4.801 – 5.004)
8
7
5
6
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
3
2
4
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0°– 8° TYP
0.016 – 0.050
(0.406 – 1.270)
0.050
0.014 – 0.019
(1.270)
(0.355 – 0.483)
BSC
TYP
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
SO8 1298
S Package
16-Lead Plastic Small Outline (Narrow 0.150)
(LTC DWG # 05-08-1610)
0.386 – 0.394*
(9.804 – 10.008)
16
15
14
13
12
11
10
9
0.150 – 0.157**
(3.810 – 3.988)
0.228 – 0.244
(5.791 – 6.197)
1
0.010 – 0.020
× 45°
(0.254 – 0.508)
0.008 – 0.010
(0.203 – 0.254)
2
3
4
5
6
7
0.053 – 0.069
(1.346 – 1.752)
0.004 – 0.010
(0.101 – 0.254)
0° – 8° TYP
0.016 – 0.050
(0.406 – 1.270)
*DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH
SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE
0.014 – 0.019
(0.355 – 0.483)
TYP
8
0.050
(1.270)
BSC
**DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD
FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE
S16 1098
135859fb
14
LT1358/LT1359
U
PACKAGE DESCRIPTIO
Dimension in inches (millimeters) unless otherwise noted.
S Package
14-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.337 – .344
(8.560 – 8.738)
NOTE 3
.045 ±.005
.050 BSC
14
N
13
12
11
10
9
8
N
.245
MIN
.160 ±.005
.150 – .157
(3.810 – 3.988)
NOTE 3
.228 – .244
(5.791 – 6.197)
1
2
3
N/2
N/2
.030 ±.005
TYP RECOMMENDED SOLDER PAD LAYOUT
1
.010 – .020
× 45°
(0.254 – 0.508)
.008 – .010
(0.203 – 0.254)
2
3
4
5
6
.053 – .069
(1.346 – 1.752)
.004 – .010
(0.101 – 0.254)
0° – 8° TYP
.016 – .050
(0.406 – 1.270)
NOTE:
1. DIMENSIONS IN
.014 – .019
(0.355 – 0.483)
TYP
7
.050
(1.270)
BSC
INCHES
(MILLIMETERS)
2. DRAWING NOT TO SCALE
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)
S14 0502
135859fb
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.
15
LT1358/LT1359
U
TYPICAL APPLICATIO S
Instrumentation Amplifier
R5
432Ω
R1
20k
R4
20k
R2
2k
–
1/2
LT1358
R3
2k
–
1/2
LT1358
+
–
VOUT
+
VIN
+
AV =
R4 ⎡ 1 ⎛ R2 R3 ⎞ R2 + R3 ⎤
+
+
1+
= 1044
R3 ⎢⎣ 2 ⎜⎝ R1 R4 ⎟⎠
R5 ⎥⎦
TRIM R5 FOR GAIN
TRIM R1 FOR COMMON-MODE REJECTION
BW = 250kHz
135859 TA03
200kHz, 4th Order Butterworth Filter
2.61k
3.4k
100pF
47pF
3.4k
5.62k
VIN
330pF
–
1/2
LT1358
+
2.61k
5.11k
1000pF
–
1/2
LT1358
VOUT
+
135859 TA04
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1357
25MHz, 600V/µs Op Amp
Single Version of LT1358/LT1359
LT1361/LT1362
Dual and Quad 50MHz, 800V/µs Op Amps
Faster Version of LT1358/LT1359, VOS = 1mV, IS = 4mA/Amplifier
LT1355/LT1356
Dual and Quad 12MHz, 400V/µs Op Amps
Lower Power Version of LT1358/LT1359, VOS = 0.8mV, IS = 1mA/Amplifier
LT1812/LT1813/
LT1814
Single/Dual/Quad 100MHz, 750V/µs Op Amps
3.6mA/Amplifier, SOT-23, MSOP-8 and SSOP-16 Packages
135859fb
16
Linear Technology Corporation
LT/LT 1005 REV B • PRINTED IN USA
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507
●
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© LINEAR TECHNOLOGY CORPORATION 2005