LT1809/LT1810
Single/Dual 180MHz, 350V/µs
Rail-to-Rail Input and Output
Low Distortion Op Amps
DESCRIPTION
FEATURES
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–3dB Bandwidth: 320MHz, AV = 1
Gain-Bandwidth Product: 180MHz, AV ≥ 10
Slew Rate: 350V/μs
Wide Supply Range: 2.5V to 12.6V
Large Output Current: 85mA
Low Distortion, 5MHz: – 90dBc
Input Common Mode Range Includes Both Rails
Output Swings Rail-to-Rail
Input Offset Voltage, Rail-to-Rail: 2.5mV Max
Common Mode Rejection: 89dB Typ
Power Supply Rejection: 87dB Typ
Open-Loop Gain: 100V/mV Typ
Shutdown Pin: LT1809
Single in 8-Pin SO and 6-Pin SOT-23 Packages
Dual in 8-Pin SO and MSOP Packages
Operating Temperature Range: –40°C to 85°C
Low Profile (1mm) SOT-23 (ThinSOT™) Package
APPLICATIONS
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The LT®1809/LT1810 are single/dual low distortion rail-torail input and output op amps with a 350V/μs slew rate.
These amplifiers have a –3dB bandwidth of 320MHz at
unity-gain, a gain-bandwidth product of 180MHz (AV ≥ 10)
and an 85mA output current to fit the needs of low voltage,
high performance signal conditioning systems.
The LT1809/LT1810 have an input range that includes
both supply rails and an output that swings within 20mV
of either supply rail to maximize the signal dynamic range
in low supply applications.
The LT1809/LT1810 have very low distortion (–90dBc) up
to 5MHz that allows them to be used in high performance
data acquisition systems.
The LT1809/LT1810 maintain their performance for supplies
from 2.5V to 12.6V and are specified at 3V, 5V and ± 5V
supplies. The inputs can be driven beyond the supplies
without damage or phase reversal of the output.
The LT1809 is available in the 8-pin SO package with the
standard op amp pinout and the 6-pin SOT-23 package.
The LT1810 features the standard dual op amp pinout and
is available in 8-pin SO and MSOP packages. These devices
can be used as a plug-in replacement for many op amps
to improve input/output range and performance.
Driving A/D Converters
Low Voltage Signal Processing
Active Filters
Rail-to-Rail Buffer Amplifiers
Video Line Driver
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
TYPICAL APPLICATION
Distortion vs Frequency
–40
High Speed ADC Driver
–50
5V
VIN
1VP-P
+
R3
49.9Ω
LT1809
+AIN
C1
470pF
–
–5V
–AIN
LTC®1420
PGA GAIN = 1
REF = 2.048V
R2
1k
1809 TA01a
–5V
R1
1k
•
•
•
12 BITS
10Msps
DISTORTION (dB)
5V
AV = +1
VIN = 2VP-P
VS = ±5V
–60
–70
RL = 100Ω, 2ND
–80
–90
RL = 100Ω, 3RD
RL = 1k, 3RD
–100
RL = 1k, 2ND
–110
0.3
1
10
30
FREQUENCY (MHz)
1809 TA01b
180910fa
1
LT1809/LT1810
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Total Supply Voltage (V + to V–) ............................. 12.6V
Input Voltage (Note 2) ............................................... ±VS
Input Current (Note 2) ......................................... ±10mA
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 4) ...– 40°C to 85°C
Specified Temperature Range (Note 5) ....–40°C to 85°C
Junction Temperature ........................................... 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
SHDN 1
6 V+
OUT 1
V– 2
–IN 2
5 SHDN
+IN 3
–
+
+IN 3
4 –IN
V–
S6 PACKAGE
6-LEAD PLASTIC TSOT-23
4
8
NC
7
V+
6
OUT
5
NC
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 145°C/W (Note 9)
TJMAX = 150°C, θJA = 100°C/W (Note 9)
TOP VIEW
TOP VIEW
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
8 V+
OUT A 1
V+
OUT B
–IN B
+IN B
–IN A 2
7 OUT B
A
+IN A 3
V– 4
MS8 PACKAGE
8-LEAD PLASTIC MSOP
6 –IN B
B
5 +IN B
S8 PACKAGE
8-LEAD PLASTIC SO
TJMAX = 150°C, θJA = 130°C/W (Note 9)
TJMAX = 150°C, θJA = 100°C/W (Note 9)
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
SPECIFIED TEMPERATURE RANGE
LT1809CS6#PBF
LT1809CS6#TRPBF
LTKY
6-Lead Plastic TSOT-23
0°C to 70°C
LT1809IS6#PBF
LT1809IS6#TRPBF
LTUF
6-Lead Plastic TSOT-23
–40°C to 85°C
LT1809CS8#PBF
LT1809CS8#TRPBF
1809
8-Lead Plastic SO
0°C to 70°C
LT1809IS8#PBF
LT1809IS8#TRPBF
1809I
8-Lead Plastic SO
–40°C to 85°C
LT1810CMS8#PBF
LT1810CMS8#TRPBF
LTRF
8-Lead Plastic MSOP
0°C to 70°C
LT1810IMS8#PBF
LT1810IMS8#TRPBF
LTTQ
8-Lead Plastic MSOP
–40°C to 85°C
LT1810CS8#PBF
LT1810CS8#TRPBF
1810
8-Lead Plastic SO
0°C to 70°C
LT1810IS8#PBF
LT1810IS8#TRPBF
1810I
8-Lead Plastic SO
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
180910fa
2
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply,
SYMBOL
PARAMETER
CONDITIONS
TYP
MAX
VOS
Input Offset Voltage
VCM = V +
VCM = V–
VCM = V+
VCM = V–
LT1809 SO-8
LT1809 SO-8
MIN
0.6
0.6
0.6
0.6
2.5
2.5
3.0
3.0
mV
mV
mV
mV
ΔVOS
Input Offset Shift
VCM = V– to V+
VCM = V– to V+
LT1809 SO-8
0.3
0.3
2.0
2.5
mV
mV
0.7
6
mV
1.8
–13
8
μA
μA
Input Offset Voltage Match (Channel-to-Channel)
(Note 10)
IB
Input Bias Current
VCM = V+
VCM = V– + 0.2V
–27.5
UNITS
Input Bias Current Shift
VCM = V – + 0.2V to V+
14.8
35.5
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
VCM = V +
VCM = V– + 0.2V
0.1
0.2
4
8
μA
μA
IOS
Input Offset Current
VCM = V +
VCM = V– + 0.2V
0.05
0.2
1.2
4
μA
μA
ΔIOS
Input Offset Current Shift
VCM = V– + 0.2V to V+
0.25
5.2
en
Input Noise Voltage Density
f = 10kHz
16
nV/√Hz
in
Input Noise Current Density
f = 10kHz
5
pA/√Hz
CIN
Input Capacitance
2
pF
AVOL
Large-Signal Voltage Gain
VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2
VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2
VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2
25
4
15
80
10
42
V/mV
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+
66
61
82
78
dB
dB
CMRR Match (Channel-to-Channel) (Note 10)
VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+
60
55
82
78
dB
dB
ΔIB
V–
Input Common Mode Range
PSRR
V+
μA
V
Power Supply Rejection Ratio
VS = 2.5V to 10V, VCM = 0V
71
87
dB
PSRR Match (Channel-to-Channel) (Note 10)
VS = 2.5V to 10V, VCM = 0V
65
87
dB
Minimum Supply Voltage (Note 6)
2.3
2.5
V
VOL
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
12
50
180
50
120
375
mV
mV
mV
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
20
80
330
80
180
650
mV
mV
mV
ISC
Short-Circuit Current
VS = 5V
VS = 3V
IS
Supply Current per Amplifier
ISHDN
±45
±35
±85
±70
mA
mA
12.5
17
mA
Supply Current, Shutdown
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
0.55
0.31
1.25
0.90
mA
mA
SHDN Pin Current
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
420
220
750
500
μA
μA
Output Leakage Current, Shutdown
VSHDN = 0.3V
0.1
75
μA
0.3
V
VL
SHDN Pin Input Voltage Low
VH
SHDN Pin Input Voltage High
tON
Turn-On Time
VS – 0.5
VSHDN = 0.3V to 4.5V, RL = 100
V
80
ns
180910fa
3
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
unless otherwise noted.
TA = 25°C. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply,
SYMBOL
PARAMETER
CONDITIONS
MIN
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
GBW
Gain-Bandwidth Product
SR
Slew Rate
TYP
MAX
UNITS
50
ns
Frequency = 2MHz
160
MHz
VS = 5V, AV = –1, RL = 1k, VO = 4VP-P
300
V/μs
FPBW
Full Power Bandwidth
VS = 5V, VOUT = 4VP-P
23.5
MHz
THD
Total Harmonic Distortion
VS = 5V, AV = 1, RL = 1k, VO = 2VP-P, fC = 5MHz
– 86
dB
tS
Settling Time
0.1%, VS = 5V, VSTEP = 2V, AV = –1, RL = 500Ω
27
ns
ΔG
Differential Gain (NTSC)
VS = 5V, AV = 2, RL = 150Ω
0.015
%
Δθ
Differential Phase (NTSC)
VS = 5V, AV = 2, RL = 150Ω
0.05
Deg
The l denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open;
VCM = VOUT = half supply, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
VOS TC
Input Offset Voltage Drift (Note 8)
ΔVOS
Input Offset Voltage Shift
VCM = V +
VCM = V–
VCM = V+
VCM = V–
VCM = V+
VCM = V–
VCM = V– to V+
VCM = V– to V+
VCM = V –, VCM = V+
Input Offset Voltage Match (Channel-to-Channel)
(Note 10)
IB
ΔIB
MIN
LT1809 SO-8
LT1809 SO-8
LT1809 SO-8
TYP
MAX
UNITS
l
l
l
l
1
1
1
1
3.0
3.0
3.5
3.5
mV
mV
mV
mV
l
l
9
9
25
25
μV/°C
μV/°C
l
l
0.5
0.5
2.5
3.0
mV
mV
l
1.2
6.5
mV
2
–14
10
μA
μA
VCM = V + – 0.2V
VCM = V– + 0.4V
l
l
Input Bias Current Shift
VCM = V – + 0.4V to V+ – 0.2V
l
16
40
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V– + 0.4V to V+ – 0.2V
l
0.1
0.5
5
10
μA
μA
l
l
0.05
0.40
1.5
4.5
μA
μA
l
0.45
6
μA
Input Bias Current
–30
IOS
Input Offset Current
ΔIOS
Input Offset Current Shift
AVOL
Large-Signal Voltage Gain
VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2
VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2
VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2
l
l
l
20
3.5
12
75
8.5
40
V/mV
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+
l
l
64
60
80
75
dB
dB
CMRR Match (Channel-to-Channel) (Note 10)
VS = 5V, VCM = V–, VCM = V+
VS = 3V, VCM = V–, VCM = V+
l
58
54
80
75
dB
dB
l
V–
Input Common Mode Range
PSRR
V
Power Supply Rejection Ratio
VS = 2.5V to 10V, VCM = 0V
l
70
83
dB
PSRR Match (Channel-to-Channel) (Note 10)
VS = 2.5V to 10V, VCM = 0V
l
64
83
dB
Minimum Supply Voltage (Note 6)
VOL
V+
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
l
2.3
2.5
V
l
l
l
12
55
200
60
140
400
mV
mV
mV
180910fa
4
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C
temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
ISC
Short-Circuit Current
VS = 5V
VS = 3V
l
l
IS
Supply Current per Amplifier
ISHDN
MIN
±40
±30
TYP
MAX
UNITS
50
110
370
120
220
700
mV
mV
mV
±75
± 65
mA
mA
l
15
20
mA
Supply Current, Shutdown
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
l
l
0.58
0.35
1.4
1.1
mA
mA
SHDN Pin Current
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
l
l
420
220
850
550
μA
μA
Output Leakage Current, Shutdown
VSHDN = 0.3V
l
2
μA
VL
SHDN Pin Input Voltage Low
VH
SHDN Pin Input Voltage High
tON
Turn-On Time
VSHDN = 0.3V to 4.5V, RL = 100
l
80
ns
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
l
50
ns
l
l
0.3
V
VS – 0.5
V
GBW
Gain-Bandwidth Product
Frequency = 2MHz
l
145
MHz
SR
Slew Rate
VS = 5V, AV = –1, RL = 1k, VO = 4VP-P
l
250
V/μs
FPBW
Full Power Bandwidth
VS = 5V, VOUT = 4VP-P
l
20
MHz
The l denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open;
VCM = VOUT = half supply, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
VOS TC
Input Offset Voltage Drift (Note 8)
ΔVOS
Input Offset Voltage Shift
VCM = V +
VCM = V–
VCM = V+
VCM = V–
VCM = V+
VCM = V–
VCM = V– to V+
VCM = V –
VCM = V+, VCM = V –
Input Offset Voltage Match (Channel-to-Channel)
(Note 10)
IB
ΔIB
MIN
LT1809 SO-8
LT1809 SO-8
LT1809 SO-8
TYP
MAX
UNITS
l
l
l
l
1
1
1
1
3.5
3.5
4.0
4.0
mV
mV
mV
mV
l
l
9
9
25
25
μV/°C
μV/°C
l
l
0.5
0.5
3.0
3.5
mV
mV
l
1.2
7
mV
2
–17
12
μA
μA
VCM = V+ – 0.2V
VCM = V– + 0.4V
l
l
Input Bias Current Shift
VCM = V – + 0.4V to V+ – 0.2V
l
19
47
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V– + 0.4V to V+ – 0.2V
l
l
0.2
0.6
6
12
μA
μA
l
l
0.08
0.5
2
6
μA
μA
l
0.58
7.5
μA
VS = 5V, VO = 0.5V to 4.5V, RL = 1k to VS/2
VS = 5V, VO = 1V to 4V, RL = 100Ω to VS/2
VS = 3V, VO = 0.5V to 2.5V, RL = 1k to VS/2
l
l
l
Input Bias Current
IOS
Input Offset Current
ΔIOS
Input Offset Current Shift
AVOL
Large-Signal Voltage Gain
–35
17
2.5
10
60
7
35
V/mV
V/mV
V/mV
180910fa
5
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
The l denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C
temperature range. VS = 5V, 0V; VS = 3V, 0V; VSHDN = open; VCM = VOUT = half supply, unless otherwise noted. (Note 5)
SYMBOL
CMRR
PARAMETER
CONDITIONS
Common Mode Rejection Ratio
VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+
VS = 5V, VCM = V– to V+
VS = 3V, VCM = V– to V+
CMRR Match (Channel-to-Channel) (Note 10)
MIN
TYP
l
l
63
58
80
75
dB
dB
l
l
57
52
78
72
dB
dB
l
V–
VS = 2.5V to 10V, VCM = 0V
l
69
VS = 2.5V to 10V, VCM = 0V
l
63
Input Common Mode Range
PSRR
Power Supply Rejection Ratio
PSRR Match (Channel-to-Channel) (Note 10)
Minimum Supply Voltage (Note 6)
MAX
V+
83
UNITS
V
dB
83
dB
l
2.3
2.5
V
VOL
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
18
60
210
70
150
450
mV
mV
mV
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
55
120
375
130
240
750
mV
mV
mV
ISC
Short-Circuit Current
VS = 5V
VS = 3V
l
l
IS
Supply Current per Amplifier
ISHDN
±30
±25
±70
±60
mA
mA
l
15
21
mA
Supply Current, Shutdown
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
l
l
0.58
0.35
1.5
1.2
mA
mA
SHDN Pin Current
VS = 5V, VSHDN = 0.3V
VS = 3V, VSHDN = 0.3V
●
●
420
220
900
600
μA
μA
Output Leakage Current, Shutdown
VSHDN = 0.3V
●
3
μA
VL
SHDN Pin Input Voltage Low
●
VH
SHDN Pin Input Voltage High
●
tON
Turn-On Time
VSHDN = 0.3V to 4.5V, RL = 100
●
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
●
50
ns
GBW
Gain-Bandwidth Product
Frequency = 2MHz
●
140
MHz
SR
Slew Rate
VS = 5V, AV = -1, RL = 1k, VO = 4VP-P
●
180
V/μs
FPBW
Full Power Bandwidth
VS = 5V, VOUT = 4VP-P
●
14
MHz
0.3
VS – 0.5
V
V
80
ns
TA = 25°C. VS = ± 5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
TYP
MAX
VOS
Input Offset Voltage
VCM = V +
VCM = V–
VCM = V+
VCM = V–
LT1809 SO-8
LT1809 SO-8
MIN
0.8
0.8
0.8
0.8
3.0
3.0
3.5
3.5
mV
mV
mV
mV
ΔVOS
Input Offset Voltage Shift
VCM = V– to V+
VCM = V– to V+
LT1809 SO-8
0.35
0.35
2.5
3.0
mV
mV
1
6
mV
2
–12.5
10
μA
μA
Input Offset Voltage Match (Channel-to-Channel) VCM = V +, VCM = V–
(Note 10)
IB
Input Bias Current
VCM = V +
VCM = V– + 0.2V
–30
UNITS
180910fa
6
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
TA = 25°C. VS = ± 5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL
ΔIB
PARAMETER
CONDITIONS
TYP
MAX
Input Bias Current Shift
VCM
= V – + 0.2V to V+
MIN
UNITS
14.5
40
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
0.1
0.4
5
10
μA
μA
0.05
0.40
2
5
μA
μA
0.45
7
μA
IOS
Input Offset Current
ΔIOS
Input Offset Current Shift
VCM = V+
VCM = V– + 0.2V
VCM = V+
VCM = V– + 0.2V
VCM = V– + 0.2V to V+
en
Input Noise Voltage Density
f = 10kHz
16
nV/√Hz
in
Input Noise Current Density
f = 10kHz
5
pA/√Hz
CIN
Input Capacitance
f = 100kHz
AVOL
Large-Signal Voltage Gain
VO = –4V to 4V, RL = 1k
VO = –2.5V to 2.5V, RL = 100Ω
30
4.5
100
12
2
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V– to V+
70
89
dB
CMRR Match (Channel-to-Channel) (Note 10)
VCM = V– to V+
64
89
V–
Input Common Mode Range
pF
dB
V+
V
Power Supply Rejection Ratio
V+ = 2.5V to 10V, V– = 0V
71
87
dB
PSRR Match (Channel-to-Channel) (Note 10)
V+ = 2.5V to 10V, V– = 0V
65
90
dB
VOL
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
12
50
180
60
140
425
mV
mV
mV
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
35
90
310
100
200
700
mV
mV
mV
ISC
Short-Circuit Current
IS
Supply Current per Amplifier
15
20
mA
mA
PSRR
ISHDN
±55
±85
mA
Supply Current, Shutdown
VSHDN = 0.3V
0.6
1.3
SHDN Pin Current
VSHDN = 0.3V
420
750
μA
Output Leakage Current, Shutdown
VSHDN = 0.3V
0.1
75
μA
0.3
V
VL
SHDN Pin Input Voltage Low
VH
SHDN Pin Input Voltage High
tON
Turn-On Time
VSHDN = 0.3V to 4.5V, RL = 100
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
50
ns
GBW
Gain-Bandwidth Product
Frequency = 2MHz
110
180
MHz
SR
Slew Rate
AV = –1, RL = 1k, VO = ± 4V,
Measured at VO = ±3V
175
350
V/μs
FPBW
Full Power Bandwidth
VOUT = 8VP-P
14
MHz
V+ – 0.5
V
80
ns
THD
Total Harmonic Distortion
AV = 1, RL = 1k, VO = 2VP-P, fC = 5MHz
–90
dB
tS
Settling Time
0.1%, VSTEP = 8V, AV = –1, RL = 500Ω
34
ns
ΔG
Differential Gain (NTSC)
AV = 2, RL = 150Ω
0.01
%
Δθ
Differential Phase (NTSC)
AV = 2, RL = 150Ω
0.01
Deg
180910fa
7
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the 0°C ≤ TA ≤ 70°C
temperature range. VS = ± 5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
= V+
MIN
MAX
UNITS
l
l
l
l
1
1
1
1
3.25
3.25
3.75
3.75
mV
mV
mV
mV
l
l
10
10
25
25
l
l
0.5
0.5
2.75
3.25
mV
mV
VOS
Input Offset Voltage
VCM
VCM = V–
VCM = V+
VCM = V–
VOS TC
Input Offset Voltage Drift (Note 8)
VCM = V+
VCM = V–
ΔVOS
Input Offset Voltage Shift
VCM = V– to V+
VCM = V– to V+
Input Offset Voltage Match (Channel-to-Channel)
(Note 10)
VCM = V– to V+
l
1.2
6.5
mV
Input Bias Current
VCM = V+ – 0.2V
l
2.5
12.5
μA
= V– + 0.4V
l
IB
VCM
LT1809 SO-8
LT1809 SO-8
TYP
LT1809 SO-8
–37.5
–15
μV/°C
μV/°C
μA
Input Bias Current Shift
VCM = V – + 0.4V to V+ – 0.2V
l
17.5
50
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
VCM = V+ – 0.2V
VCM = V– + 0.4V
l
l
0.1
0.5
6
12
μA
μA
IOS
Input Offset Current
VCM = V+ – 0.2V
VCM = V– + 0.4V
l
l
0.06
0.5
2.25
6
μA
μA
ΔIOS
Input Offset Current Shift
VCM = V– + 0.4V to V+ – 0.2V
l
0.56
8.25
μA
AVOL
Large-Signal Voltage Gain
VO = –4V to 4V, RL = 1k
VO = –2.5V to 2.5V, RL = 100Ω
l
l
27
3.5
80
10
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V– to V+
l
69
86
dB
= V– to V+
l
63
86
l
V–
Power Supply Rejection Ratio
V + = 2.5V to 10V, V– = 0V
l
70
l
64
ΔIB
CMRR Match (Channel-to-Channel) (Note 10)
VCM
Input Common Mode Range
PSRR
dB
V+
83
V
dB
PSRR Match (Channel-to-Channel) (Note 10)
V+ = 2.5V to 10V, V– = 0V
VOL
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
20
50
210
80
160
475
mV
mV
mV
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
60
120
370
140
240
750
mV
mV
mV
ISC
Short-Circuit Current
l
IS
Supply Current per Amplifier
l
Supply Current, Shutdown
VSHDN = 0.3V
l
ISHDN
SHDN Pin Current
VSHDN = 0.3V
l
Output Leakage Current, Shutdown
VSHDN = 0.3V
l
3
VL
SHDN Pin Input Voltage Low
l
VH
SHDN Pin Input Voltage High
l
±45
83
dB
±75
17.5
mA
25
mA
0.6
1.5
mA
420
850
μA
μA
0.3
V+ – 0.5
V
V
tON
Turn-On Time
VSHDN = 0.3V to 4.5V, RL = 100
l
80
ns
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
l
50
ns
GBW
Gain-Bandwidth Product
Frequency = 2MHz
l
85
170
MHz
140
300
V/μs
12
MHz
SR
Slew Rate
AV = –1, RL = 1k, VO = ± 4V,
Measured at VO = ±3V
l
FPBW
Full Power Bandwidth
VOUT = 8VP-P
l
180910fa
8
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the – 40°C ≤ TA ≤ 85°C
temperature range. VS = ±5V, VSHDN = open, VCM = 0V, VOUT = 0V, unless otherwise noted. (Note 5)
SYMBOL
PARAMETER
CONDITIONS
VOS
Input Offset Voltage
VOS TC
Input Offset Voltage Drift (Note 8)
ΔVOS
Input Offset Voltage Shift
VCM = V +
VCM = V–
VCM = V+
VCM = V–v
VCM = V+
VCM = V–
VCM = V– to V+
VCM = V– to V+
VCM = V– to V+
Input Offset Voltage Match (Channel-to-Channel)
(Note 10)
IB
ΔIB
MIN
LT1809 SO-8
LT1809 SO-8
LT1809 SO-8
TYP
MAX
UNITS
l
l
l
l
1
1
1
1
3.75
3.75
4.25
4.25
mV
mV
mV
mV
l
l
10
10
25
25
l
l
0.5
0.5
3.00
3.75
mV
mV
l
1.2
7.5
mV
2.8
–17
14
μA
μA
μV/°C
μV/°C
VCM = V+ – 0.2V
VCM = V– + 0.4V
l
l
Input Bias Current Shift
VCM = V – + 0.4V to V+ – 0.2V
l
19.8
59
μA
Input Bias Current Match (Channel-to-Channel)
(Note 10)
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V+ – 0.2V
VCM = V– + 0.4V
VCM = V– + 0.4V to V+ – 0.2V
l
l
0.1
0.6
7
14
μA
μA
l
l
0.08
0.6
2.5
8
μA
μA
l
0.68
10.5
μA
Input Bias Current
–45
IOS
Input Offset Current
ΔIOS
Input Offset Current Shift
AVOL
Large-Signal Voltage Gain
VO = –4V to 4V, RL = 1k
VO = –2.5V to 2.5V, RL = 100Ω
l
l
22
3
70
10
V/mV
V/mV
CMRR
Common Mode Rejection Ratio
VCM = V – to V+
l
68
86
dB
= V– to V+
l
62
86
l
V–
Power Supply Rejection Ratio
V+ = 2.5V to 10V, V– = 0V
l
69
l
63
CMRR Match (Channel-to-Channel) (Note 10)
VCM
Input Common Mode Range
PSRR
dB
V+
83
V
dB
PSRR Match (Channel-to-Channel) (Note 10)
V+ = 2.5V to 10V, V– = 0V
VOL
Output Voltage Swing LOW (Note 7)
No Load
ISINK = 5mA
ISINK = 25mA
l
l
l
23
60
220
100
170
525
mV
mV
mV
VOH
Output Voltage Swing HIGH (Note 7)
No Load
ISOURCE = 5mA
ISOURCE = 25mA
l
l
l
75
130
375
160
260
775
mV
mV
mV
ISC
Short-Circuit Current
l
IS
Supply Current per Amplifier
l
19
25
mA
ISHDN
±30
83
dB
±75
mA
Supply Current, Shutdown
VSHDN = 0.3V
l
0.65
1.6
mA
SHDN Pin Current
VSHDN = 0.3V
l
420
900
μA
Output Leakage Current, Shutdown
VSHDN = 0.3V
l
4
VL
SHDN Pin Input Voltage Low
l
VH
SHDN Pin Input Voltage High
l
μA
0.3
V+ – 0.5
V
V
tON
Turn-On Time
VSHDN = 0.3V to 4.5V, RL = 100
l
80
ns
tOFF
Turn-Off Time
VSHDN = 4.5V to 0.3V, RL = 100
l
50
ns
GBW
Gain-Bandwidth Product
Frequency = 2MHz
l
80
160
MHz
SR
Slew Rate
AV = –1, RL = 1k, VO = ±4V,
Measured at VO = ±3V
l
l
110
220
V/μs
FPBW
Full Power Bandwidth
VOUT = 8VP-P
l
8.5
MHz
180910fa
9
LT1809/LT1810
ELECTRICAL CHARACTERISTICS
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 1.4V, the input current should be limited to less than
10mA.
Note 3: A heat sink may be required to keep the junction temperature
below the absolute maximum rating when the output is shorted
indefinitely.
Note 4: The LT1809C/LT1809I and LT1810C/LT1810I are guaranteed
functional over the operating temperature range of – 40°C and 85°C.
Note 5: The LT1809C/LT1810C are guaranteed to meet specified
performance from 0°C to 70°C. The LT1809C/LT1810C 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
LT1809I/LT1810I are guaranteed to meet specified performance from
–40°C to 85°C.
Note 6: Minimum supply voltage is guaranteed by power supply rejection
ratio test.
Note 7: Output voltage swings are measured between the output and
power supply rails.
Note 8: This parameter is not 100% tested.
Note 9: Thermal resistance varies depending upon the amount of PC board
metal attached to the V– pin of the device. θJA is specified for a certain
amount of 2oz of copper metal trace connecting to the V – pin as described
in the thermal resistance tables in the Applications Information section.
Note 10: Matching parameters are the difference between the two
amplifiers of the LT1810.
180910fa
10
LT1809/LT1810
TYPICAL PERFORMANCE CHARACTERISTICS
VOS Distribution, VCM = 0V
(PNP Stage)
VOS Distribution, VCM = 5V
(NPN Stage)
50
25
VS = 5V, 0V
VS = 5V, 0V
VS = 5V, 0V
40
30
20
10
20
PERCENT OF UNITS (%)
PERCENT OF UNITS (%)
30
20
10
2
–1
0
1
–2
INPUT OFFSET VOLTAGE (mV)
–3
0
3
–3
2
–1
0
1
–2
INPUT OFFSET VOLTAGE (mV)
1809 G01
2.0
0
TA = 25°C
0
–0.5
TA = –55°C
5
–1.0
1
2 3 4 5 6 7 8
TOTAL SUPPLY VOLTAGE (V)
9
1
2
3
4
INPUT COMMON MODE VOLTAGE (V)
0
10
1
10
OUTPUT LOW SATURATION VOLTAGE (V)
INPUT BIAS CURRENT (μA)
3
VCM = 5V
–1
–3
–5
–7
VCM = 0V
–9
–11
–13
–15
–50 –35 –20 –5 10 25 40 55
TEMPERATURE (°C)
70
85
1809 G07
TA = 125°C
TA = –55°C
–5
–10
TA = –55°C
–15
TA = 25°C
TA = 125°C
–20
–30
5
0
–1
4
5
1
3
2
COMMON MODE VOLTAGE (V)
Output Saturation Voltage
vs Load Current (Output High)
10
VS = 5V, 0V
1
0.1
TA = 125°C
0.01
0.001
0.01
TA = –55°C
TA = 25°C
0.1
1
10
LOAD CURRENT (mA)
6
1809 G06
Output Saturation Voltage
vs Load Current (Output Low)
Input Bias Current vs Temperature
VS = 5V, 0V
0
1809 G05
1809 G04
5
TA = 25°C
–25
–1.5
0
VS = 5V, 0V
5
INPUT BIAS CURRENT (μA)
OFFSET VOLTAGE (mV)
SUPPLY CURRENT (mA)
TA = –55°C
10
1.0
0.5
1
Input Bias Current
vs Common Mode Voltage
TA = 125°C
20
10
–1 –0.75 –0.5 –0.25 0 0.25 0.5 0.75
INPUT OFFSET VOLTAGE (mV)
1809 G03
VS = 5V, 0V
TYPICAL PART
1.5
TA = 25°C
0
3
Offset Voltage
vs Input Common Mode
25
15
10
1809 G02
Supply Current vs Supply Voltage
TA = 125°C
15
5
OUTPUT HIGH SATURATION VOLTAGE (V)
PERCENT OF UNITS (%)
40
0
ΔVOS Shift for VCM = 0V to 5V
50
100
1809 G08
VS = 5V, 0V
1
0.1
TA = 125°C
TA = 25°C
0.01
TA = –55°C
0.001
0.01
0.1
1
10
LOAD CURRENT (mA)
100
1809 G09
180910fa
11
LT1809/LT1810
TYPICAL PERFORMANCE CHARACTERISTICS
120
0.6
0.4
0.2
TA = –55°C
0
TA = 125°C
–0.2
–0.4
TA = 25°C
–0.6
–0.8
1.5
2.0
2.5 3.0 3.5
4.0 4.5
TOTAL SUPPLY VOLTAGE (V)
TA = 125°C
60
40
“SINKING”
20
0
–20
“SOURCING”
–40
TA = –55°C
–60
4.0 4.5
2.0 2.5 3.0 3.5
POWER SUPPLY VOLTAGE (±V)
TA = 25°C
–250
–300
1.5
1.0
0.5
RL = 1k
0
–0.5
–1.0
RL = 100Ω
0.5
–0.5
–1.0
–2.0
0.5
1.5
2.0
1.0
OUTPUT VOLTAGE (V)
OFFSET VOLTAGE (mV)
RL = 1k
0
–0.5
–1.0
RL = 100Ω
–1.5
5
180
TA = 25°C
TA = 125°C
0
TA = –55°C
–5
–10
TA = 25°C
160
VS = ±5V
140
120
100
80
VS = 5V, 0V
60
VS = 3V, 0V
40
20
–2.0
–2.5
5
4
Warm-Up Drift vs Time
(LT1809S8)
VS = ±5V
10
1.5
0.5
3
2
OUTPUT VOLTAGE (V)
1809 G15
CHANGE IN OFFSET VOLTAGE (μV)
15
1.0
1
0
Offset Voltage vs Output Current
VS = ±5V
2.0
3.0
2.5
1809 G14
Open-Loop Gain
2.5
RL = 100Ω
–1.5
–2.5
0
RL = 1k
0
–2.0
1809 G13
INPUT VOLTAGE (mV)
1.0
–2.5
5
VS = 5V, 0V
2.0
–450
3
4
2
SHDN PIN VOLTAGE (V)
5
4
3
2
SHDN PIN VOLTAGE (V)
2.5
–400
1
1
1809 G12
VS = 3V, 0V
–1.5
–350
0
TA = –55°C
0
INPUT VOLTAGE (mV)
INPUT VOLTAGE (mV)
SHDN PIN CURRENT (μA)
TA = –55°C
4
0
5.0
1.5
–200
6
Open-Loop Gain
2.0
–50
–150
8
Open-Loop Gain
2.5
TA = 125°C
TA = 25°C
10
1809 G11
VS = 5V, 0V
–100
12
TA = 25°C
1.5
SHDN Pin Current
vs SHDN Pin Voltage
0
TA = 125°C
14
2
–80
5.0
TA = 125°C
1809 G10
50
VS = 5V, 0V
16
80
–100
–1.0
18
TA = 25°C
TA = –55°C
100
SUPPLY CURRENT (mA)
VCM = V– + 0.5V
0.8
OUTPUT SHORT-CIRCUIT CURRENT (mA)
CHANGE IN OFFSET VOLTAGE (mV)
1.0
Supply Current
vs SHDN Pin Voltage
Output Short-Circuit Current
vs Power Supply Voltage
Minimum Supply Voltage
–5 –4 –3 –2 –1 0 1 2 3
OUTPUT VOLTAGE (V)
4
5
1809 G16
–15
–100 –80 –60 –40 –20 0 20 40 60 80 100
OUTPUT CURRENT (mA)
1809 G17
0
0
20
40 60 80 100 120 140 160
TIME AFTER POWER UP (SEC)
1809 G18
180910fa
12
LT1809/LT1810
TYPICAL PERFORMANCE CHARACTERISTICS
Input Noise Voltage vs Frequency
20
CURRENT NOISE (pA/√Hz)
NOISE VOLTAGE (nV/√Hz)
80
70
60
50
NPN ACTIVE
VCM = 4.5V
40
30
PNP ACTIVE
VCM = 2.5V
20
8
16
12
8
PNP ACTIVE
VCM = 2.5V
4
1
10
FREQUENCY (kHz)
0.1
100
1
10
FREQUENCY (kHz)
180
GAIN BANDWIDTH
GAIN BANDWIDTH (MHz)
185
100
2
6
8
4
TOTAL SUPPLY VOLTAGE (V)
35
30
–25
VS = 5V, 0V
300
250
200
AV = 1
RF = RG = 1k
RL = 1k
RISING AND FALLING
SLEW RATE
150
100
50
25
0
75
TEMPERATURE (°C)
100
50
–55 –25
125
75
50
25
TEMPERATURE (°C)
0
100
1809 G23
Gain and Phase vs Frequency
PHASE
100
15
80
12
Closed-Loop Gain vs Frequency
15
AV = +1
12
9
VS = ±5V
60
20
20
VS = 3V, 0V
0
10
GAIN
GAIN (dB)
VS = ±5V
6
VS = 3V
3
0
VS = ±5V
–3
–6
–20
0
CL = 5pF
RL = 1k
1G
1809 G25
AV = +2
9
6
PHASE (DEG)
40
30
125
1809 G24
Closed-Loop Gain vs Frequency
60
10M
100M
FREQUENCY (Hz)
VS = ±5V
350
GAIN BANDWIDTH
1809 G22
1M
400
VS = 3V, 0V
150
–55
10
40
180
160
450
45
VS = ±5V
190
165
VS = 3V, 0V
1809 G21
50
VS = ±5V
200
170
40
TIME (2s/DIV)
Slew Rate vs Temperature
VS = 3V, 0V
170
50
–10
PHASE MARGIN (DEG)
35
PHASE MARGIN (DEG)
GAIN BANDWIDTH (MHz)
PHASE MARGIN
45
190
GAIN (dB)
–6
55
50
40
–20
100k
–4
–8
55
PHASE MARGIN
–10
0
–2
Gain Bandwidth and Phase
Margin vs Temperature
TA = 25°C
RL = 1k
0
2
1809 G20
Gain Bandwidth and Phase
Margin vs Supply Voltage
160
4
0
1809 G19
175
6
NPN ACTIVE
VCM = 4.5V
10
0
0.1
10
VS = 5V, 0V
OUTPUT VOLTAGE (μV/DIV)
VS = 5V, 0V
SLEW RATE (V/μs)
90
GAIN (dB)
100
0.1Hz to 10Hz
Output Voltage Noise
Input Noise Current vs Frequency
VS = 3V
3
VS = ±5V
0
–3
–6
–9
–9
–40
–12
–12
–60
–15
100k
1M
10M
FREQUENCY (Hz)
100M
500M
1809 G26
–15
100k
1M
10M
FREQUENCY (Hz)
100M
500M
1809 G27
180910fa
13
LT1809/LT1810
TYPICAL PERFORMANCE CHARACTERISTICS
Common Mode Rejection Ratio
vs Frequency
110
VS = 5V, 0V
COMMON MODE REJECTION RATIO (dB)
600
OUTPUT IMPEDANCE (Ω)
100
10
AV = 10
AV = 2
1
AV = 1
0.1
0.01
100k
1M
10M
FREQUENCY (Hz)
100M
90
80
70
60
50
40
30
20
1M
10M
FREQUENCY (Hz)
OVERSHOOT (%)
OVERSHOOT (%)
RS = 10Ω,
RL = ∞
RS = 20Ω, RL = ∞
10
10
1k
30
RS = 20Ω
RL = ∞
25
15
RL = RS = 50Ω
100
CAPACITIVE LOAD (pF)
10
1809 G32
Distortion vs Frequency
Distortion vs Frequency
–40
–50
RL = 100Ω, 2ND
–80
Distortion vs Frequency
–40
AV = +1
VO = 2VP-P
VS = 5V
–50
–60
DISTORTION (dB)
DISTORTION (dB)
–70
RL = 1k, 2ND
–70
RL = 100Ω, 2ND
–80
RL = 100Ω, 3RD
RL = 1k, 3RD
–100
AV = +2
VO = 2VP-P
VS = ±5V
–60
RL = 100Ω, 2ND
–70
–80
–90
–90
–90
RL = 100Ω, 3RD
–100
1809 G33
20ns/DIV)
VS = ±5V
VOUT = ±4V
AV = –1
RL = 500Ω
tS = 110ns (SETTLING TIME)
1000
1809 G31
AV = +1
VO = 2VP-P
VS = ±5V
100M
20
1000
–60
10M
OUTPUT
SETTLING
RESOLUTION
(2mV/DIV)
0
100
CAPACITIVE LOAD (pF)
100k
1M
FREQUENCY (Hz)
10k
5
RL = RS = 50Ω
10
DISTORTION (dB)
30
20
1809 G30
RS = 10Ω
RL = ∞
35
10
0
–50
40
INPUT SIGNAL
GENERATION
(2V/DIV)
VS = 5V, 0V
45 AV = +2
15
–40
NEGATIVE
SUPPLY
50
0.01% Settling Time
40
5
60
100M 500M
50
30
20
POSITIVE
SUPPLY
70
Series Output Resistor
vs Capacitive Load
VS = 5V, 0V
AV = +1
25
80
1809 G29
Series Output Resistor
vs Capacitive Load
35
VS = 5V, 0V
TA = 25°C
90
0
100k
1809 G28
40
100
VS = 5V, 0V
100
10
10k
500M
Power Supply Rejection Ratio
vs Frequency
POWER SUPPLY REJECTION RATIO (dB)
Output Impedance vs Frequency
RL = 1k, 3RD
RL = 1k, 2ND
–100
RL = 100Ω, 3RD
–110
0.3
1
RL = 1k, 3RD
RL = 1k, 2ND
–110
0.3
1
10
30
–110
0.3
1
10
30
1809 G34
10
30
FREQUENCY (MHz)
FREQUENCY (MHz)
FREQUENCY (MHz)
1809 G35
1809 G36
180910fa
14
LT1809/LT1810
TYPICAL PERFORMANCE CHARACTERISTICS
Maximum Undistorted Output
Signal vs Frequency
Distortion vs Frequency
DISTORTION (dB)
–50
4.6
AV = +2
VO = 2VP-P
VS = 5V
–60
RL = 100Ω, 2ND
–70
–80
RL = 100Ω, 3RD
RL = 1k, 2ND
RL = 1k, 3RD
–90
–100
–110
0.3
1
10
OUTPUT VOLTAGE SWING (VP-P)
–40
VS = 5V
4.5
AV = –1
4.4
4.3
AV = +2
4.2
4.1
4.0
3.9
0.1
30
1
10
FREQUENCY (MHz)
FREQUENCY (MHz)
1809 G37
± 5V Large-Signal Response
VS = ±5V
AV = +1
RL = 1k
10ns/DIV)
1809 G38
± 5V Small-Signal Response
1809 G39
VS = ±5V
AV = +1
RL = 1k
5V Small-Signal Response
10ns/DIV)
5V Large-Signal Response
1809 G40
VS = ±5V
AV = +1
RL = 1k
Output Overdriven Recovery
VS = ±5V
AV = +1
RL = 1k
10ns/DIV)
10ns/DIV)
1809 G41
Shutdown Response
VIN
(1V/DIV)
VOUT
(2V/DIV)
100
VSHDN
0V)
0V)
VOUT
0V)
0V)
1809 G42
VS = 5V, 0V
AV = +2
10ns/DIV)
1809 G43
VS = 5V, 0V
AV = +2
RL = 100Ω
100ns/DIV)
1809 G44
180910fa
15
LT1809/LT1810
APPLICATIONS INFORMATION
Rail-to-Rail Characteristics
Power Dissipation
The LT1809/LT1810 have an input and output signal range
that includes both negative and positive power supply.
Figure 1 depicts a simplified schematic of the amplifier.
The input stage is comprised of two differential amplifiers,
a PNP stage Q1/Q2 and a NPN stage Q3/Q4 that are active
over different ranges of common mode input voltage. The
PNP differential pair is active for common mode voltages
between the negative supply to approximately 1.5V below
the positive supply. As the input voltage moves closer
toward the positive supply, the transistor Q5 will steer
the tail current I1 to the current mirror Q6/Q7, activating
the NPN differential pair and causing the PNP pair to
become inactive for the rest of the input common mode
range up to the positive supply.
The LT1809/LT1810 amplifiers combine high speed with
large output current in a small package, so there is a need
to ensure that the die’s junction temperature does not
exceed 150°C. The LT1809 is housed in an SO-8 package
or a 6-lead SOT-23 package and the LT1810 is in an SO-8
or 8-lead MSOP package. All packages have the V – supply pin fused to the lead frame to enhance the thermal
conductance when connecting to a ground plane or a large
metal trace. Metal trace and plated through-holes can be
used to spread the heat generated by the device to the
backside of the PC board. For example, on a 3/32" FR-4
board with 2oz copper, a total of 660 square millimeters
connected to Pin 4 of LT1810 in an SO-8 package (330
square millimeters on each side of the PC board) will bring
the thermal resistance, θJA, to about 85°C/W. Without
extra metal trace connected to the V – pin to provide a heat
sink, the thermal resistance will be around 105°C/W. More
information on thermal resistance for all packages with
various metal areas connecting to the V – pin is provided
in Tables 1, 2 and 3 for thermal consideration.
A pair of complementary common emitter stages
Q14/Q15 form the output stage, enabling the output to
swing from rail-to-rail. The capacitors C1 and C2 form
the local feedback loops that lower the output impedance
at high frequency. These devices are fabricated on Linear
Technology’s proprietary high speed complementary
bipolar process.
V+
R6
10k
R3
Q16
V+
Q17
D9
SHDN
ESDD1
R7
100k
R5
V–
V+
ESDD5
R4
ESDD2
D1
Q12
Q11
I1
Q13
Q15
C2
+IN
D6
D8
D5
D7
ESDD6
V–
–IN
Q5
VBIAS
V–
I2
CC
Q4 Q3
ESDD4
BIAS
GENERATION
D2
OUT
V–
Q1 Q2
D3
ESDD3
BUFFER
AND
OUTPUT BIAS
Q10
V+
D4
Q9
Q8
C1
Q7
Q14
Q6
R1
V–
R2
1809 F01
Figure 1. LT1809 Simplified Schematic Diagram
180910fa
16
LT1809/LT1810
APPLICATIONS INFORMATION
Table 1. LT1809 6-Lead SOT-23 Package
COPPER AREA
TOPSIDE (mm2)
BOARD AREA
(mm2)
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
270
2500
135°C/W
100
2500
145°C/W
20
2500
160°C/W
0
2500
200°C/W
Device is mounted on topside.
Example: An LT1810 in SO-8 mounted on a 2500mm2 area
of PC board without any extra heat spreading plane connected to its V – pin has a thermal resistance of 105°C/W,
θJA. Operating on ± 5V supplies with both amplifiers
simultaneously driving 50Ω loads, the worst-case power
dissipation is given by:
PD(MAX) = 2 • (10 • 25mA) + 2 • (2.5)2/50
= 0.5 + 0.250 = 0.750W
Table 2. LT1809/LT1810 SO-8 Package
COPPER AREA
TOPSIDE
(mm2)
BACKSIDE
(mm2)
BOARD AREA
(mm2)
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
1100
1100
2500
65°C/W
330
330
2500
85°C/W
35
35
2500
95°C/W
35
0
2500
100°C/W
0
0
2500
105°C/W
The maximum ambient temperature that the part is allowed to operate is:
TA = TJ – (PD(MAX) • 105°C/W)
= 150°C – (0.750W • 105°C/W) = 71°C
To operate the device at higher ambient temperature, connect more metal area to the V – pin to reduce the thermal
resistance of the package as indicated in Table 2.
Device is mounted on topside.
Input Offset Voltage
Table 3. LT1810 8-Lead MSOP Package
COPPER AREA
TOPSIDE
(mm2)
BACKSIDE
(mm2)
BOARD AREA
(mm2)
THERMAL RESISTANCE
(JUNCTION-TO-AMBIENT)
540
540
2500
110°C/W
100
100
2500
120°C/W
100
0
2500
130°C/W
30
0
2500
135°C/W
0
0
2500
140°C/W
Device is mounted on topside.
Junction temperature TJ is calculated from the ambient
temperature TA and power dissipation PD as follows:
TJ = TA + (PD • θJA)
The power dissipation in the IC is the function of the
supply voltage, output voltage and the load resistance.
For a given supply voltage, the worst-case power dissipation PD(MAX) occurs at the maximum supply current
with the output voltage at half of either supply voltage (or
the maximum swing is less than 1/2 the supply voltage).
PD(MAX) is given by:
PD(MAX) = (VS • IS(MAX)) + (VS/2)2/RL
The offset voltage will change depending upon which
input stage is active and the maximum offset voltage is
guaranteed to be less than 3mV. The change of VOS over
the entire input common mode range (CMRR) is less than
2.5mV on a single 5V and 3V supply.
Input Bias Current
The input bias current polarity depends upon a given input
common voltage at whichever input stage is operating.
When the PNP input stage is active, the input bias currents flow out of the input pins and flow into the input pins
when the NPN input stage is activated. Because the input
offset current is less than the input bias current, matching
the source resistances at the input pin will reduce total
offset error.
Output
The LT1809/LT1810 can deliver a large output current,
so the short-circuit current limit is set around 90mA to
prevent damage to the device. Attention must be paid to
keep the junction temperature of the IC below the absolute
maximum rating of 150°C (refer to the Power Dissipation
section) when the output is continuously short-circuited.
180910fa
17
LT1809/LT1810
APPLICATIONS INFORMATION
The output of the amplifier has reverse-biased diodes
connected to each supply. If the output is forced beyond
either supply, unlimited current will flow through these
diodes. If the current is transient and limited to several
hundred milliamps, no damage to the device will occur.
Overdrive Protection
When the input voltage exceeds the power supplies, two
pairs of crossing diodes, D1 to D4, will prevent the output from reversing polarity. If the input voltage exceeds
either power supply by 700mV, diodes D1/D2 or D3/D4
will turn on, keeping the output at the proper polarity.
For the phase reversal protection to perform properly,
the input current must be limited to less than 5mA. If
the amplifier is severely overdriven, an external resistor
should be used to limit the overdrive current.
The LT1809/LT1810’s input stages are also protected
against differential input voltages of 1.4V or higher by
back-to-back diodes, D5/D8, that prevent the emitterbase breakdown of the input transistors. The current in
these diodes should be limited to less than 10mA when
they are active. The worst-case differential input voltage
usually occurs when the input is driven while the output
is shorted to ground in a unity-gain configuration. In addition, the amplifier is protected against ESD strikes up
to 3kV on all pins by a pair of protection diodes on each
pin that are connected to the power supplies as shown
in Figure 1.
Capacitive Load
The LT1809/LT1810 is optimized for high bandwidth and
low distortion applications. It can drive a capacitive load
about 20pF in a unity-gain configuration and more with
higher gain. When driving a larger capacitive load, a resistor
of 10Ω to 50Ω should be connected between the output
and the capacitive load to avoid ringing or oscillation. The
feedback should still be taken from the output so that the
resistor will isolate the capacitive load to ensure stability.
Graphs on capacitive loads indicate the transient response
of the amplifier when driving capacitive load with a specified series resistor.
Feedback Components
When feedback resistors are used to set up gain, care must
be taken to ensure that the pole formed by the feedback
resistors and the total capacitance at the inverting input
does not degrade stability. For instance, the LT1809 in a
noninverting gain of 2, set up with two 1k resistors and a
capacitance of 3pF (device plus PC board), will probably
ring in transient response. The pole that is formed at
106MHz will reduce phase margin by 34 degrees when the
crossover frequency of the amplifier is around 70MHz. A
capacitor of 3pF or higher connected across the feedback
resistor will eliminate any ringing or oscillation.
SHDN Pin
The LT1809 has a SHDN pin to reduce the supply current
to less than 1.25mA. When the SHDN pin is pulled low,
it will generate a signal to power down the device. If the
pin is left unconnected, an internal pull-up resistor of 10k
will keep the part fully operating as shown in Figure 1. The
output will be high impedance during shutdown, and the
turn-on and turn-off time is less than 100ns. Because the
inputs are protected by a pair of back-to-back diodes, the
input signal will feed through to the output during shutdown mode if the amplitude of signal between the inputs
is larger than 1.4V.
180910fa
18
LT1809/LT1810
TYPICAL APPLICATIONS
and resistors, an NPO chip capacitor and metal-film surface
mount resistors, should be used since these components
can add to distortion. The voltage glitch of the converter,
due to its sampling nature, is buffered by the LT1809 and
the ability of the amplifier to settle it quickly will affect the
spurious-free dynamic range of the system. Figure 2 to
Figure 7 depict the LT1809 driving the LTC1420 at different
configurations and voltage supplies. The FFT responses
show better than 90dB of SFDR for a ± 5V supply, and 80dB
on a 5V single supply for the 1.394MHz signal.
Driving A/D Converters
The LT1809/LT1810 have a 27ns settling time to 0.1% of
a 2V step signal and 20Ω output impedance at 100MHz
making it ideal for driving high speed A/D converters. With
the rail-to-rail input and output and low supply voltage
operation, the LT1809 is also desirable for single supply
applications. As shown in Figure 2, the LT1809 drives a
10Msps, 12-bit ADC, the LTC1420. The lowpass filter, R3
and C1, reduces the noise and distortion products that
might come from the input signal. High quality capacitors
0
VS = ±5V
AV = +2
fSAMPLE = 10Msps
fIN = 1.394MHz
SFDR = 90dB
–20
5V
VIN
1VP-P
+
R3
49.9Ω
LT1809
+AIN
C1
470pF
–
–5V
–AIN
LTC1420
PGA GAIN = 1
REF = 2.048V
R2
1k
•
•
•
12 BITS
10Msps
AMPLITUDE (dB)
5V
–40
–60
–80
–100
1809 F02
–5V
R1
1k
–120
0
1
2
3
FREQUENCY (MHz)
5
4
1809 F03
Figure 2. Noninverting A/D Driver
Figure 3. 4096 Point FFT Response
0
1k
VS = ±5V
AV = –1
fSAMPLE = 10Msps
fIN = 1.394MHz
SFDR = 90dB
–20
5V
VIN
2VP-P
1k
–
49.9Ω
LT1809
+
+AIN
470pF
–AIN
LTC1420
PGA GAIN = 1
REF = 2.048V
–5V
•
•
•
12 BITS
10Msps
AMPLITUDE (dB)
5V
–40
–60
–80
1809 F04
–5V
–100
–120
0
1
2
3
FREQUENCY (MHz)
4
5
1809 F05
Figure 4. Inverting A/D Driver
Figure 5. 4096 Point FFT Response
180910fa
19
LT1809/LT1810
TYPICAL APPLICATIONS
0
VS = 5V
AV = +2
fSAMPLE = 10Msps
fIN = 1.394MHz
SFDR = 80dB
–20
5V
VIN
1VP-P
ON 2.5V DC
3
7
+
6
LT1809
2
49.9Ω
1
1
–
4
+AIN
2 –AIN
470pF
LTC1420
PGA GAIN = 2
REF = 4.096V
•
•
•
12 BITS
10Msps
AMPLITUDE (dB)
5V
–40
–60
–80
VCM
3
1k
1809 F06
–100
1μF
–120
1k
0
1
0.15μF
2
3
FREQUENCY (MHz)
5
4
1809 F07
Figure 7. 4096 Point FFT Response
Figure 6. Single Supply A/D Driver
5
5V
VIN
RT
75Ω
R2
5k
3
C3
1000μF
7
+
6
LT1809
2
–
R3
1k
+
VS = 5V
3
4
R5
75Ω
75Ω
COAX CABLE
R4
1k
C4
3pF
C2
150μF
VOUT
RLOAD
75Ω
1809 F08
VOLTAGE GAIN (dB)
+
R1
5k
+
C1
33μF
4
2
1
0
–1
–2
–3
–4
–5
0.2
1
10
FREQUENCY (MHz)
100
1809 F09
Figure 8. 5V Single Supply Video Line Driver
Figure 9. Video Line Driver Frequency Response
Single Supply Video Line Driver
The LT1809 is a wideband rail-to-rail op amp with a large
output current that allows it to drive video signals in low
supply applications. Figure 8 depicts a single supply
video line driver with AC coupling to minimize the quiescent power dissipation. Resistors R1 and R2 are used
to level-shift the input and output to provide the largest
signal swing. A gain of 2 is set up with R3 and R4 to restore the signal at VOUT, which is attenuated by 6dB due
to the matching of the 75Ω line with the back-terminated
resistor, R5. The back termination will eliminate any reflection of the signal that comes from the load. The input
termination resistor, RT, is optional—it is used only if
matching of the incoming line is necessary. The values of
C1, C2 and C3 are selected to minimize the droop of the
luminance signal. In some less stringent requirements, the
value of capacitors could be reduced. The – 3dB bandwidth
of the driver is about 95MHz on 5V supply and the amount
of peaking will vary upon the value of capacitor C4.
180910fa
20
LT1809/LT1810
PACKAGE DESCRIPTION
MS8 Package
8-Lead Plastic MSOP
(Reference LTC DWG # 05-08-1660 Rev F)
0.889 ± 0.127
(.035 ± .005)
5.23
(.206)
MIN
3.20 – 3.45
(.126 – .136)
0.42 ± 0.038
(.0165 ± .0015)
TYP
3.00 ± 0.102
(.118 ± .004)
(NOTE 3)
0.65
(.0256)
BSC
8
7 6 5
0.52
(.0205)
REF
RECOMMENDED SOLDER PAD LAYOUT
0.254
(.010)
3.00 ± 0.102
(.118 ± .004)
(NOTE 4)
4.90 ± 0.152
(.193 ± .006)
DETAIL “A”
0° – 6° TYP
GAUGE PLANE
1
0.53 ± 0.152
(.021 ± .006)
DETAIL “A”
2 3
4
1.10
(.043)
MAX
0.86
(.034)
REF
0.18
(.007)
SEATING
PLANE
0.22 – 0.38
(.009 – .015)
TYP
0.65
(.0256)
BSC
0.1016 ± 0.0508
(.004 ± .002)
MSOP (MS8) 0307 REV F
NOTE:
1. DIMENSIONS IN MILLIMETER/(INCH)
2. DRAWING NOT TO SCALE
3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS.
MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS.
INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE
5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX
180910fa
21
LT1809/LT1810
PACKAGE DESCRIPTION
S6 Package
6-Lead Plastic TSOT-23
(Reference LTC DWG # 05-08-1636 Rev B)
0.62
MAX
2.90 BSC
(NOTE 4)
0.95
REF
1.22 REF
3.85 MAX 2.62 REF
1.4 MIN
2.80 BSC
1.50 – 1.75
(NOTE 4)
PIN ONE ID
RECOMMENDED SOLDER PAD LAYOUT
PER IPC CALCULATOR
0.30 – 0.45
6 PLCS (NOTE 3)
0.95 BSC
0.80 – 0.90
0.20 BSC
0.01 – 0.10
1.00 MAX
DATUM ‘A’
0.30 – 0.50 REF
0.09 – 0.20
(NOTE 3)
NOTE:
1. DIMENSIONS ARE IN MILLIMETERS
2. DRAWING NOT TO SCALE
3. DIMENSIONS ARE INCLUSIVE OF PLATING
4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR
5. MOLD FLASH SHALL NOT EXCEED 0.254mm
6. JEDEC PACKAGE REFERENCE IS MO-193
1.90 BSC
S6 TSOT-23 0302 REV B
180910fa
22
LT1809/LT1810
PACKAGE DESCRIPTION
S8 Package
8-Lead Plastic Small Outline (Narrow .150 Inch)
(Reference LTC DWG # 05-08-1610)
.050 BSC
.189 – .197
(4.801 – 5.004)
NOTE 3
.045 ±.005
8
.245
MIN
.160 ±.005
5
.150 – .157
(3.810 – 3.988)
NOTE 3
1
RECOMMENDED SOLDER PAD LAYOUT
.010 – .020
× 45°
(0.254 – 0.508)
2
3
4
.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
6
.228 – .244
(5.791 – 6.197)
.030 ±.005
TYP
.008 – .010
(0.203 – 0.254)
7
.014 – .019
(0.355 – 0.483)
TYP
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)
.050
(1.270)
BSC
SO8 0303
180910fa
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.
23
LT1809/LT1810
TYPICAL APPLICATION
Single 3V Supply, 4MHz, 4th Order Butterworth Filter
Benefiting from a low voltage supply operation, low distortion and rail-to-rail output of LT1809, a low distortion
filter that is suitable for antialiasing can be built as shown
in Figure 10. On a 3V supply, the filter has a passband of
4MHz with 2.5VP-P signal and a stopband that is greater
than 70dB to frequency of 100MHz.
232Ω
274Ω
47pF
22pF
232Ω
665Ω
–
VIN
220pF
274Ω
562Ω
–
1/2 LT1810
470pF
+
1/2 LT1810
VOUT
+
VS
1809 F10
2
Figure 10. Single 3V Supply, 4MHz, 4th Order Butterworth Filter
10
0
–10
GAIN (dB)
–20
–30
–40
–50
–60
–70
–80
VS = 3V, 0V
VIN = 2.5VP-P
–90
10k
100k
1M
10M
FREQUENCY (Hz)
100M
1809 F11
Figure 11. Filter Frequency Response
RELATED PARTS
PART NUMBER
DESCRIPTION
COMMENTS
LT1395
400MHz Current Feedback Amplifier
800V/μs Slew Rate, Shutdown
LT1632/LT1633
Dual/Quad 45MHz, 45V/μs Rail-to-Rail Input and Output Op Amps
High DC Accuracy, 1.35mV VOS(MAX), 70mA Output Current,
Max Supply Current 5.2mA per Amplifier
LT1630/LT1631
Dual/Quad 30MHz, 10V/μs Rail-to-Rail Input and Output Op Amps
High DC Accuracy, 525μV VOS(MAX), 70mA Output Current,
Max Supply Current 4.4mA per Amplifier
LT1806/LT1807
Single/Dual 325MHz, 140V/μs Rail-to-Rail Input and Output Op Amps High DC Accuracy, 550μV VOS(MAX), Low Noise 3.5nV/√Hz,
Low Distortion –80dBc at 5MHz
180910fa
24 Linear Technology Corporation
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