LT1812
3mA, 100MHz, 750V/µs
Operational Amplifier
with Shutdown
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
100MHz Gain Bandwidth
750V/µs Slew Rate
3.6mA Maximum Supply Current
50
µ
A Supply Current in Shutdown
8nV/√Hz Input Noise Voltage
Unity-Gain Stable
1.5mV Maximum Input Offset Voltage
4µA Maximum Input Bias Current
400nA Maximum Input Offset Current
40mA Minimum Output Current, V
OUT
=
±3V
±3.5V
Minimum Input CMR, V
S
=
±5V
30ns Settling Time to 0.1%, 5V Step
Specified at
±5V,
Single 5V Supplies
Operating Temperature Range: – 40°C to 85°C
The LT
®
1812 is a low power, high speed, very high slew
rate operational amplifier with excellent DC performance.
The LT1812 features reduced supply current, lower input
offset voltage, lower input bias current and higher DC gain
than other devices with comparable bandwidth. A power
saving shutdown feature reduces supply current to 50µA.
The circuit topology is a voltage feedback amplifier with
the slewing characteristics of a current feedback amplifier.
The output drives a 100Ω load to
±3.5V
with
±5V
supplies.
On a single 5V supply, the output swings from 1.1V to 3.9V
with a 100Ω load connected to 2.5V. The amplifier is stable
with a 1000pF capacitive load which makes it useful in
buffer and cable driver applications.
The LT1812 is manufactured on Linear Technology’s
advanced low voltage complementary bipolar process.
The dual version is the LT1813. For higher supply voltage
single, dual and quad operational amplifiers with up to
70MHz gain bandwidth, see the LT1351 through LT1365
data sheets.
, LTC and LT are registered trademarks of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
s
s
Wideband Amplifiers
Buffers
Active Filters
Video and RF Amplification
Cable Drivers
Data Acquisition Systems
TYPICAL APPLICATIO
4MHz, 4th Order Butterworth Filter
232Ω
274Ω
47pF
VOLTAGE GAIN (dB)
10
0
–10
–20
–30
–40
–50
–60
–70
–80
1812 TA01
V
IN
220pF
LT1812
470pF
+
–
+
–
232Ω
665Ω
274Ω
562Ω
22pF
LT1812
V
OUT
–90
0.1
U
Filter Frequency Response
V
S
=
±5V
V
IN
= 600mV
P-P
PEAKING < 0.12dB
1
10
FREQUENCY (MHz)
100
1812 TA02
U
U
1
LT1812
ABSOLUTE
(Note 1)
AXI U
RATI GS
PACKAGE/ORDER I FOR ATIO
TOP VIEW
NC 1
–IN 2
+IN 3
V
–
4
8
7
6
5
SHDN
V
+
V
OUT
NC
Total Supply Voltage (V
+
to V
–
) ............................. 12.6V
Differential Input Voltage (Transient Only, Note 2) ...
±3V
Input Voltage ...........................................................
±V
S
Output Short-Circuit Duration (Note 3) ............ Indefinite
Operating Temperature Range (Note 8) ... – 40°C to 85°C
Specified Temperature Range
(Note 8) .............................................. – 40°C to 85°C
Maximum Junction Temperature ......................... 150°C
Storage Temperature Range .................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec)................... 300°C
ORDER PART
NUMBER
LT1812CS8
LT1812IS8
S8 PART MARKING
1812
1812I
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 80°C/ W (NOTE 9)
Consult factory for Military grade parts.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
I
OS
I
B
e
n
i
n
R
IN
C
IN
V
CM
CMRR
PSRR
A
VOL
V
OUT
I
OUT
I
SC
SR
FPBW
GBW
t
r
, t
f
OS
t
PD
t
s
THD
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Minimum Supply Voltage
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Full Power Bandwidth
Gain Bandwidth Product
Rise Time, Fall Time
Overshoot
Propagation Delay
Settling Time
Total Harmonic Distortion
Differential Gain
Differential Phase
R
OUT
Output Resistance
(Note 4)
T
A
= 25°C, V
S
=
±5V,
V
CM
= 0V unless otherwise noted.
MIN
TYP
0.4
30
– 0.9
MAX
1.5
400
±4
UNITS
mV
nA
µA
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
– 3.5
±2
V
V
dB
V
dB
V/mV
V/mV
V
V
mA
mA
V/µs
MHz
MHz
ns
%
ns
ns
dB
%
DEG
Ω
CONDITIONS
f = 10kHz
f = 10kHz
V
CM
=
±3.5V
Differential
3
8
1
10
1.5
2
3.5
4.2
– 4.2
85
±1.25
97
3.0
2.5
±4.0
±3.5
±60
±110
750
40
75
100
2
25
2.8
30
–76
0.12
0.07
0.4
V
CM
=
±3.5V
V
S
=
±2V
to
±5.5V
V
OUT
=
±3V,
R
L
= 500Ω
V
OUT
=
±3V,
R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
=
±3V,
30mV Overdrive
V
OUT
= 0V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
3V Peak (Note 6)
f = 200kHz
A
V
= 1, 10% to 90%, 0.1V, R
L
= 100Ω
A
V
= 1, 0.1V, R
L
= 100Ω
A
V
= 1, 50% V
IN
to 50% V
OUT
, 0.1V, R
L
= 100Ω
5V Step, 0.1%, A
V
= – 1
f = 1MHz, V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 500Ω
V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 150Ω
V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 150Ω
A
V
= 1, f = 1MHz
75
78
1.5
1.0
±3.80
±3.35
±40
±75
500
2
U
W
U
U
W W
W
LT1812
ELECTRICAL CHARACTERISTICS
SYMBOL
I
SHDN
I
S
PARAMETER
SHDN Pin Current
Supply Current
T
A
= 25°C, V
S
=
±5V,
V
CM
= 0V unless otherwise noted.
MIN
–100
TYP
0
– 50
3
50
MAX
±1
3.6
100
UNITS
µA
µA
mA
µA
+ 2.0V (On)
+ 0.4V (Off)
CONDITIONS
SHDN > V
–
SHDN < V
–
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
T
A
= 25°C, V
S
= 5V, V
CM
= 2.5V, R
L
to 2.5V unless otherwise noted.
SYMBOL
V
OS
I
OS
I
B
e
n
i
n
R
IN
C
IN
V
CM
CMRR
A
VOL
V
OUT
PARAMETER
Input Offset Voltage
Input Offset Current
Input Bias Current
Input Noise Voltage Density
Input Noise Current Density
Input Resistance
Input Capacitance
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing (Positive)
Maximum Output Swing (Negative)
I
OUT
I
SC
SR
FPBW
GBW
t
r
, t
f
OS
t
PD
t
s
THD
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Full Power Bandwidth
Gain Bandwidth Product
Rise Time, Fall Time
Overshoot
Propagation Delay
Settling Time
Total Harmonic Distortion
Differential Gain
Differential Phase
Output Resistance
SHDN Pin Current
Supply Current
CONDITIONS
(Note 4)
MIN
TYP
0.5
30
– 1.0
8
1
10
1.5
2
4
1
82
2.0
1.5
4.1
3.9
0.9
1.1
±40
±80
350
55
94
2.1
25
3
30
–75
0.22
0.21
0.45
0
– 20
2.7
20
MAX
2.0
400
±4
UNITS
mV
nA
µA
nV/√Hz
pA/√Hz
MΩ
MΩ
pF
V
V
dB
V/mV
V/mV
V
V
V
V
mA
mA
V/µs
MHz
MHz
ns
%
ns
ns
dB
%
DEG
Ω
µA
µA
mA
µA
f = 10kHz
f = 10kHz
V
CM
= 1.5V to 3.5V
Differential
3
3.5
V
CM
= 1.5V to 3.5V
V
OUT
= 1.5V to 3.5V, R
L
= 500Ω
V
OUT
= 1.5V to 3.5V, R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
= 3.5V or 1.5V, 30mV Overdrive
V
OUT
= 2.5V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
1V Peak (Note 6)
f = 200kHz
A
V
= 1, 10% to 90%, 0.1V, R
L
= 100Ω
A
V
= 1, 0.1V, R
L
= 100Ω
A
V
= 1, 50% V
IN
to 50% V
OUT
, 0.1V, R
L
= 100Ω
2V Step, 0.1%, A
V
= – 1
f = 1MHz, V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 500Ω
V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 150Ω
V
OUT
= 2V
P-P
, A
V
= 2, R
L
= 150Ω
A
V
= 1, f = 1MHz
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
73
1.0
0.7
3.9
3.7
1.5
1.1
1.3
±25
±55
200
65
R
OUT
I
SHDN
I
S
±1
3.6
50
– 50
0°C
≤
T
A
≤
70°C, V
S
=
±5V,
V
CM
= 0V unless otherwise noted.
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
CONDITIONS
(Note 4)
(Note 7)
MIN
TYP
10
MAX
2
15
500
±5
UNITS
mV
µV/°C
nA
µA
3
LT1812
ELECTRICAL CHARACTERISTICS
SYMBOL
V
CM
CMRR
PSRR
A
VOL
V
OUT
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
PARAMETER
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Minimum Supply Voltage
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Gain Bandwidth Product
SHDN Pin Current
Supply Current
0°C
≤
T
A
≤
70°C. V
S
=
±5V,
V
CM
= 0V unless otherwise noted.
MIN
3.5
73
±2
76
1.0
0.7
±3.70
±3.25
±35
±60
400
65
±1.5
–150
4.6
150
TYP
MAX
– 3.5
UNITS
V
V
dB
V
dB
V/mV
V/mV
V
V
mA
mA
V/µs
MHz
µA
µA
mA
µA
CONDITIONS
V
CM
=
±3.5V
V
S
=
±2V
to
±5.5V
V
OUT
=
±3V,
R
L
= 500Ω
V
OUT
=
±3V,
R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
=
±3V,
30mV Overdrive
V
OUT
= 0V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
f = 200kHz
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
0°C
≤
T
A
≤
70°C, V
S
= 5V, V
CM
= 2.5V, R
L
to 2.5V unless otherwise noted.
V
OS
∆V
OS
/∆T
I
OS
I
B
V
CM
CMRR
A
VOL
V
OUT
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing (Positive)
Maximum Output Swing (Negative)
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Gain Bandwidth Product
SHDN Pin Current
Supply Current
(Note 4)
(Note 7)
10
2.5
15
500
±5
1.5
V
CM
= 1.5V to 3.5V
V
OUT
= 1.5V to 3.5V, R
L
= 500Ω
V
OUT
= 1.5V to 3.5V, R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
= 3.5V or 1.5V, 30mV Overdrive
V
OUT
= 2.5V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
f = 200kHz
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
71
0.7
0.5
3.8
3.6
1.2
1.4
±20
±45
150
55
±1.5
– 75
4.5
75
mV
µV/°C
nA
µA
V
V
dB
V/mV
V/mV
V
V
V
V
mA
mA
V/µs
MHz
µA
µA
mA
µA
3.5
– 40°C
≤
T
A
≤
85°C. V
S
=
±5V,
V
CM
= 0V unless otherwise noted (Note 8).
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
V
CM
CMRR
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
CONDITIONS
(Note 4)
(Note 7)
MIN
TYP
10
MAX
3
30
600
±6
– 3.5
V
CM
=
±3.5V
72
UNITS
mV
µV/°C
nA
µA
V
V
dB
3.5
4
LT1812
ELECTRICAL CHARACTERISTICS
– 40°C
≤
T
A
≤
85°C. V
S
=
±5V,
V
CM
= 0V unless otherwise noted (Note 8).
SYMBOL
PSRR
A
VOL
V
OUT
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
PARAMETER
Minimum Supply Voltage
Power Supply Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Gain Bandwidth Product
SHDN Pin Current
Supply Current
CONDITIONS
V
S
=
±2V
to
±5.5V
V
OUT
=
±3V,
R
L
= 500Ω
V
OUT
=
±3V,
R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
=
±3V,
30mV Overdrive
V
OUT
= 0V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
f = 200kHz
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
MIN
75
0.8
0.6
±3.60
±3.15
±30
±55
350
60
±2
– 200
5
200
TYP
MAX
±2
UNITS
V
dB
V/mV
V/mV
V
V
mA
mA
V/µs
MHz
µA
µA
mA
µA
– 40°C
≤
T
A
≤
85°C, V
S
= 5V, V
CM
= 2.5V, R
L
to 2.5V unless otherwise noted (Note 8).
SYMBOL
V
OS
∆V
OS
/∆T
I
OS
I
B
V
CM
CMRR
A
VOL
V
OUT
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
Input Offset Current
Input Bias Current
Input Voltage Range (Positive)
Input Voltage Range (Negative)
Common Mode Rejection Ratio
Large-Signal Voltage Gain
Maximum Output Swing (Positive)
Maximum Output Swing (Negative)
I
OUT
I
SC
SR
GBW
I
SHDN
I
S
Maximum Output Current
Output Short-Circuit Current
Slew Rate
Gain Bandwidth Product
SHDN Pin Current
Supply Current
CONDITIONS
(Note 4)
(Note 7)
MIN
TYP
10
MAX
3.5
30
600
±6
1.5
V
CM
= 1.5V to 3.5V
V
OUT
= 1.5V to 3.5V, R
L
= 500Ω
V
OUT
= 2.0V to 3.0V, R
L
= 100Ω
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
R
L
= 500Ω, 30mV Overdrive
R
L
= 100Ω, 30mV Overdrive
V
OUT
= 3.5V or 1.5V, 30mV Overdrive
V
OUT
= 2.5V, 1V Overdrive (Note 3)
A
V
= – 1 (Note 5)
f = 200kHz
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
SHDN > V
–
+ 2.0V (On)
SHDN < V
–
+ 0.4V (Off)
70
0.6
0.4
3.7
3.5
1.3
1.5
±17
±40
125
50
±2
– 100
5
100
UNITS
mV
µV/°C
nA
µA
V
V
dB
V/mV
V/mV
V
V
V
V
mA
mA
V/µs
MHz
µA
µA
mA
µA
3.5
Note 1:
Absolute Maximum Ratings are those values beyond which the life of
the device may be impaired.
Note 2:
Differential inputs of
±3V
are appropriate for transient operation only,
such as during slewing. Large sustained differential inputs can cause
excessive power dissipation and may damage the part.
Note 3:
A heat sink may be required to keep the junction temperature below
absolute maximum when the output is shorted indefinitely.
Note 4:
Input offset voltage is pulse tested and is exclusive of warm-up drift.
Note 5:
Slew rate is measured between
±2V
on the output with
±3V
input for
±5V
supplies and 2V
P-P
on the output with a 3V
P-P
input for single 5V
supplies.
Note 6:
Full power bandwidth is calculated from the slew rate:
FPBW = SR/2πV
P
.
Note 7:
This parameter is not 100% tested.
Note 8:
The LT1812C is guaranteed to meet specified performance from
0°C to 70°C. The LT1812C is designed, characterized and expected to meet
specified performance from –40°C to 85°C but is not tested or QA sampled
at these temperatures. The LT1812I is guaranteed to meet specified
performance from –40°C to 85°C.
Note 9:
θ
JA
is specified for a 2500mm
2
board covered with 2 oz copper on
both sides. Thermal resistance varies, depending upon the amount of PC
board metal attached to the device. For this package in particular, power is
dissipated primarily through Pin 4, which should therefore, have a good
thermal connection to a copper plane.
5
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