LT1010
Fast
±150mA
Power Buffer
FEATURES
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DESCRIPTIO
20MHz Bandwidth
75V/µs Slew Rate
Drives
±10V
into 75Ω
5mA Quiescent Current
Drives Capacitive Loads > 1µF
Current and Thermal Limit
Operates from Single Supply
≥
4.5V
Very Low Distortion Operation
Available in 8-Pin miniDIP, Plastic TO-220
and Tiny 3mm
×
3mm
×
0.75mm 8-Pin DFN
Packages
The LT
®
1010 is a fast, unity-gain buffer that can increase
the output capability of existing IC op amps by more than
an order of magnitude. This easy-to-use part makes fast
amplifiers less sensitive to capacitive loading and reduces
thermal feedback in precision DC amplifiers.
Designed to be incorporated within the feedback loop, the
buffer can isolate almost any reactive load. Speed can be
improved with a single external resistor. Internal operat-
ing currents are essentially unaffected by the supply
voltage range. Single supply operation is also practical.
This monolithic IC is supplied in 8-pin miniDIP, plastic
TO-220 and 8-pin DFN packages. The low thermal resis-
tance power package is an aid in reducing operating
junction temperatures.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
APPLICATIO S
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Boost Op Amp Output
Isolate Capacitive Loads
Drive Long Cables
Audio Amplifiers
Video Amplifiers
Power Small Motors
Operational Power Supply
FET Driver
TYPICAL APPLICATIO
V
+
18V
Very Low Distortion Buffered Preamplifier
0.4
C2
22pF
V
+
6
R4
10k
V
+
R6
100Ω IN
LT1010CT
V
R7
50Ω
HARMONIC DISTORTION (%)
0.3
R1
1k
3
C1
22pF
+
–
7
R2
1M
LT1056CN8
2
R3
1k
4
BOOST
OUT
R8
100Ω
OUTPUT
–
NOTE 1: ALL RESISTORS 1% METAL FILM
NOTE 2: SUPPLIES WELL BYPASSED AND LOW Z
O
V
–18V
+
LM334
I
SET
= 2mA V
–
R
SET
33.2Ω
1%
1010 TA01
U
V
OUT
= 10V
P-P
R
L
= 400Ω
0.2
0.1
0
10
100
1k
10k
FREQUENCY (Hz)
100k
1010 TA02
U
U
1010fc
1
LT1010
ABSOLUTE
(Note 1)
AXI U
RATI GS
PRECO DITIO I G
100% Thermal Limit Burn In–LT1010CT
Total Supply Voltage ..............................................
±22V
Continuous Output Current ..............................
±150mA
Input Current (Note 3) .......................................
±40mA
Operating Junction Temperature Range
LT1010C ............................................... 0°C to 100°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER I FOR ATIO
TOP VIEW
V
+
1
BIAS 2
OUT 3
NC 4
9
8
7
6
5
INPUT
NC
V
–
TOP VIEW
V
+
1
BIAS 2
OUT 3
NC 4
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
8 INPUT
7 NC
6 V
–
5 NC
N8 PACKAGE
8-LEAD PDIP
V
–
NC
T
JMAX
= 100°C,
θ
JC
= 3°C/W,
θ
JA
= 40°C/W
EXPOSED PAD (PIN 9) V
–
CAN BE SOLDERED TO PCB
TO REDUCE THERMAL RESISTANCE (NOTE 7)
T
JMAX
= 100°C,
θ
JC
= 45°C/W,
θ
JA
= 100°C/W
ORDER PART
NUMBER
LT1010CDD
DD PART
MARKING
LBWZ
ORDER PART
NUMBER
LT1010CN8
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/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
SYMBOL
V
OS
PARAMETER
Output Offset Voltage
The
●
indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (See Note 4. Typical values in curves.)
CONDITIONS (Note 4)
(Note 4)
●
V
S
=
±15V,
V
IN
= 0V
I
B
Input Bias Current
I
OUT
= 0mA
I
OUT
≤
150mA
●
●
A
V
R
OUT
Large-Signal Voltage Gain
Output Resistance
I
OUT
=
±1mA
I
OUT
=
±150mA
●
Slew Rate
V
S
=
±15V,
V
IN
=
±10V,
V
OUT
=
±8V,
R
L
= 100Ω
2
UU
U
U
U
W
W W
U
W
FRONT VIEW
5
4
3
2
1
T PACKAGE
5-LEAD PLASTIC TO-220
OUTPUT
BIAS
V
–
(TAB)
V
+
INPUT
T
JMAX
= 125°C,
θ
JC
= 3°C/W,
θ
JA
= 50°C/W
ORDER PART
NUMBER
LT1010CT
MIN
0
–20
20
0
0
0
0.995
5
5
75
TYP
MAX
150
220
100
250
500
800
1.00
10
10
12
UNITS
mV
mV
mV
µA
µA
µA
V/V
Ω
Ω
Ω
V/µs
1010fc
LT1010
ELECTRICAL CHARACTERISTICS
SYMBOL
V
SOS+
V
SOS–
R
SAT
V
BIAS
I
S
PARAMETER
Positive Saturation Offset
Negative Saturation Offset
Saturation Resistance
Bias Terminal Voltage
Supply Current
The
●
indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (See Note 4. Typical values in curves.)
CONDITIONS (Note 4)
I
OUT
= 0 (Note 5)
●
MIN
TYP
MAX
1.0
1.1
0.2
0.3
22
28
UNITS
V
V
V
V
Ω
Ω
mV
mV
mA
mA
I
OUT
= 0 (Note 5)
●
I
OUT
=
±150mA
(Note 5)
●
R
BIAS
= 20Ω (Note 6)
●
700
560
840
880
9
10
I
OUT
= 0, I
BIAS
= 0
●
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:
For case temperatures above 25°C, dissipation must be derated
based on a thermal resistance of 25°C/W for the T package, 130°C/W for
the N8 package and 40°C/W for the DD package for
ambient
temperatures
above 25°C. See Applications Information.
Note 3:
In current limit or thermal limit, input current increases sharply
with input-output differentials greater than 8V; so input current must be
limited. Input current also rises rapidly for input voltages 8V above V
+
or
0.5V below V
–
.
Note 4:
Specifications apply for 4.5V
≤
V
S
≤
40V,
V
–
+ 0.5V
≤
V
IN
≤
V
+
– 1.5V and I
OUT
= 0, unless otherwise stated.
Temperature range is 0°C
≤
T
J
≤
100°C, T
C
≤
100°C.
Note 5:
The output saturation characteristics are measured with 100mV
output clipping. See Applications Information for determining available
output swing and input drive requirements for a given load.
Note 6:
The output stage quiescent current can be increased by
connecting a resistor between the BIAS pin and V
+
. The increase is
equal to the bias terminal voltage divided by this resistance.
Note 7:
Thermal resistance varies depending upon the amount of PC board
metal attached to the pin (Pin 9) of the device.
θ
JA
is specified for a certain
amount of 1oz copper metal trace connecting to Pin 9 as described in the
thermal resistance tables in the Applications Information section.
1010fc
3
LT1010
TYPICAL PERFOR A CE CHARACTERISTICS
Bandwidth
50
R
L
= 200Ω
40
PHASE LAG (DEGREES)
PHASE LAG (DEGREES)
FREQUENCY (MHz)
30
R
L
= 50Ω
20
V
IN
= 100mV
P-P
C
L
100pF
A
V
= –3dB
T
J
= 25°C
0
30
20
10
QUIESCENT CURRENT (mA)
40
1010 G01
10
0
Small-Step Response
150
100
OUTPUT IMPEDANCE (Ω)
R
L
= 100Ω
T
J
= 25°C
VOLTAGE CHANGE (mV)
VOLTAGE GAIN (dB)
50
INPUT
0
–50
OUTPUT
–100
–150
1
0
10
TIME (ns)
20
Slew Response
20
15
400
5
0
–5
–10
R
BIAS
= 20Ω
–15
–20
–50
0
50
150
100
TIME (ns)
I
BIAS
= 0
V
S
=
±15V
R
L
= 100Ω
T
J
= 25°C
f
≤
1MHz
NEGATIVE
R
L
= 100Ω
200
R
L
= 50Ω
SUPPLY CURRENT (mA)
OUTPUT VOLTAGE (V)
10
POSITIVE
SLEW RATE (V/µs)
4
U W
1010 G04
Phase Lag
50
50
Phase Lag
20
R
L
= 50Ω
R
L
= 200Ω
10
C
L
= 100pF
R
S
= 50Ω
I
BIAS
= 0
T
J
= 25°C
2
5
10
FREQUENCY (MHz)
20
1010 G02
20
R
L
= 50Ω
R
L
= 200Ω
10
C
L
= 100pF
R
S
= 50Ω
R
BIAS
= 20Ω
T
J
= 25°C
2
5
10
FREQUENCY (MHz)
20
1010 G03
5
5
Output Impedance
100
I
BIAS
= 0
T
J
= 25°C
Capacitive Loading
10
R
S
= 50Ω
I
BIAS
= 0
T
J
= 25°C
0
3nF
100pF
10
–10
0.1µF
30
0.1
1
10
FREQUENCY (MHz)
100
1010 G05
–20
0.1
1
10
FREQUENCY (MHz)
100
1010 G06
Negative Slew Rate
V
S
=
±15V
0
≥
V
IN
≥
–10V
R
L
= 200Ω
80
Supply Current
V
S
=
±15V
V
IN
=
±10V
I
L
= 0
T
C
= 25°C
300
60
40
100
20
200
250
1010 G07
0
0
0
20
10
30
QUIESCENT CURRENT (mA)
40
1010 G08
0
1
2
3
FREQUENCY (MHz)
4
5
1010 G09
1010fc
LT1010
TYPICAL PERFOR A CE CHARACTERISTICS
Output Offset Voltage
200
V
IN
= 0
OFFSET VOLTAGE (mV)
BIAS CURRENT (µA)
BIAS CURRENT (µA)
150
V
+
= 38V
V
–
= –2V
V
+
= 2V
V
–
= –38V
100
50
0
–50
0
100
TEMPERATURE (°C)
50
Voltage Gain
1.000
I
OUT
= 0
12
10
OUTPUT RESISTANCE (Ω)
NOISE VOLTAGE (nV/√Hz)
V
S
= 40V
0.999
GAIN (V/V)
V
S
= 4.5V
0.998
0.997
–50
0
100
50
TEMPERATURE (°C)
Positive Saturation Voltage
4
4
SATURATION VOLTAGE (V)
SATURATION VOLTAGE (V)
3
3
SUPPLY CURRENT (mA)
I
L
= 150mA
2
I
L
= 50mA
1
I
L
= 5mA
0
–50
0
100
TEMPERATURE (°C)
50
U W
1010 G10
1010 G16
Input Bias Current
200
V
IN
= 0
200
Input Bias Current
V
S
=
±15V
R
L
= 75Ω
150
V
+
= 38V
V
–
= –2V
100
150
T
J
= 125°C
T
J
= 25°C
100
T
J
= –55°C
50
50
V
+
= 2V
V
–
= –38V
150
0
–50
0
100
TEMPERATURE (°C)
50
150
1010 G10
0
–150
–100
50
100
0
OUTPUT CURRENT (mA)
–50
150
1010 G12
Output Resistance
I
OUT
≤
150mA
200
Output Noise Voltage
T
J
= 25°C
150
8
6
4
2
0
–50
100
R
S
= 1k
50
R
S
= 50Ω
0
10
100
1k
FREQUENCY (Hz)
10k
1010 G15
150
1010 G13
0
100
50
TEMPERATURE (°C)
150
1010 G14
Negative Saturation Voltage
7
Supply Current
V
IN
= 0
I
OUT
= 0
I
BIAS
= 0
I
L
= –150mA
T
J
= –55°C
6
T
J
= 25°C
5
2
I
L
= –50mA
1
I
L
= –5mA
4
T
J
= 125°C
150
0
–50
0
100
TEMPERATURE (°C)
50
150
1010 G16
3
0
20
10
30
TOTAL SUPPLY VOLTAGE (V)
40
1010 G18
1010fc
5
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