LT1886
Dual 700MHz, 200mA
Operational Amplifier
FEATURES
s
s
s
s
s
s
s
s
s
s
s
s
s
s
s
DESCRIPTIO
700MHz Gain Bandwidth
±200mA
Minimum I
OUT
Low Distortion: –72dBc at 1MHz, 4V
P-P
, 25Ω, A
V
= 2
Stable in A
V
≥
10, Simple Compensation for A
V
< 10
±4.3V
Minimum Output Swing, V
S
=
±6V,
R
L
= 25Ω
7mA Supply Current per Amplifier
200V/µs Slew Rate
Stable with 1000pF Load
6nV/√Hz Input Noise Voltage
2pA/√Hz Input Noise Current
4mV Maximum Input Offset Voltage
4µA Maximum Input Bias Current
400nA Maximum Input Offset Current
±4.5V
Minimum Input CMR, V
S
=
±6V
Specified at
±6V, ±2.5V
The LT
®
1886 is a 200mA minimum output current dual op
amp with outstanding distortion performance. The ampli-
fiers are gain-of-ten stable, but can be easily compensated
for lower gains. The LT1886 features balanced, high
impedance inputs with 4µA maximum input bias current,
and 4mV maximum input offset voltage. Single supply
applications are easy to implement and have lower total
noise than current feedback amplifier implementations.
The output drives a 25Ω load to
±4.3V
with
±6V
supplies.
On
±2.5V
supplies the output swings
±1.5V
with a 100Ω
load. The amplifier is stable with a 1000pF capacitive
load which makes it useful in buffer and cable driver
applications.
The LT1886 is manufactured on Linear Technology’s
advanced low voltage complementary bipolar process and
is available in a thermally enhanced SO-8 package.
APPLICATIO S
s
s
s
s
DSL Modems
xDSL PCI Cards
USB Modems
Line Drivers
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Single 12V Supply ADSL Modem Line Driver
12V
0.1µF
IN
+
+
1/2 LT1886
12.4Ω
HARMONIC DISTORTION (dBc)
–
909Ω
10k
20k
100Ω
1:2*
100Ω
1µF
10k
20k
1µF
100Ω
909Ω
*COILCRAFT X8390-A
OR EQUIVALENT
1886 TA01
12.4Ω
0.1µF
IN
–
1/2 LT1886
U
ADSL Modem Line Driver Distortion
–60
V
S
= 12V
A
V
= 10
f = 200kHz
100Ω LINE
1:2 TRANSFORMER
HD2
–80
–70
–90
HD3
–100
0
2
4
6
8
10 12
LINE VOLTAGE (V
P-P
)
14
16
1886 TA01a
U
+
–
U
1
LT1886
ABSOLUTE
MAXIMUM
RATINGS
(Note 1)
PACKAGE/ORDER I FOR ATIO
TOP VIEW
OUT A 1
–IN A 2
+IN A 3
V
–
4
B
5
+IN B
A
8
7
6
V
+
OUT B
–IN B
Total Supply Voltage (V
+
to V
–
) ........................... 13.2V
Input Current (Note 2) .......................................
±10mA
Input Voltage (Note 2) ............................................
±V
S
Maximum Continuous Output Current (Note 3)
DC ...............................................................
±100mA
AC ...............................................................
±300mA
Operating Temperature Range (Note 10) – 40°C to 85°C
Specified Temperature Range (Note 9) .. – 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
LT1886CS8
S8 PART MARKING
1886
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C,
θ
JA
= 80°C/W (Note 4)
Consult factory for Industrial and Military grade parts.
The
q
denotes specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
S
=
±6V,
V
CM
= 0V, pulse power tested unless otherwise noted. (Note 9)
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
I
OS
I
B
e
n
i
n
R
IN
C
IN
Input Offset Current
q
ELECTRICAL CHARACTERISTICS
(Note 5)
CONDITIONS
q
MIN
TYP
1
MAX
4
5
17
400
600
4
6
UNITS
mV
mV
µV/°C
nA
nA
µA
µA
nV/√Hz
pA/√Hz
MΩ
kΩ
pF
V
V
dB
V
dB
dB
V/mV
V/mV
V/mV
V/mV
±V
±V
±V
±V
±V
±V
mA
mA
(Note 8)
q
3
150
1.5
Input Bias Current
q
Input Noise Voltage
Input Noise Current
Input Resistance
Input Capacitance
Input Voltage Range (Positive)
Input Voltage Range (Negative)
f = 10kHz
f = 10kHz
V
CM
=
±4.5V
Differential
q
q
6
2
5
10
35
2
4.5
77
80
78
5.0
4.5
4.5
4.0
4.85
4.70
4.30
4.10
4.30
4.10
5.9
–5.2
98
±2
86
12
12
5
4.6
4.5
800
500
–4.5
CMRR
PSRR
A
VOL
Common Mode Rejection Ratio
Minimum Supply Voltage
Power Supply Rejection Ratio
Large-Signal Voltage Gain
V
CM
=
±4.5V
Guaranteed by PSRR
V
S
=
±2V
to
±6.5V
q
q
q
V
OUT
=
±4V,
R
L
= 100Ω
q
V
OUT
=
±4V,
R
L
= 25Ω
q
V
OUT
Output Swing
R
L
= 100Ω, 10mV Overdrive
q
R
L
= 25Ω, 10mV Overdrive
q
I
OUT
= 200mA, 10mV Overdrive
q
I
SC
Short-Circuit Current (Sourcing)
Short-Circuit Current (Sinking)
(Note 3)
2
U
W
U
U
W W
W
LT1886
The
q
denotes specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
S
=
±6V,
V
CM
= 0V, pulse power tested unless otherwise noted. (Note 9)
SYMBOL
SR
PARAMETER
Slew Rate
Full Power Bandwidth
GBW
t
r
, t
f
Gain Bandwidth
Rise Time, Fall Time
Overshoot
Propagation Delay
t
S
Settling Time
Harmonic Distortion
IMD
R
OUT
Intermodulation Distortion
Output Resistance
Channel Separation
I
S
Supply Current
CONDITIONS
A
V
= –10 (Note 6)
q
ELECTRICAL CHARACTERISTICS
MIN
133
110
TYP
200
8
700
4
1
2.5
50
– 75/– 63
– 85/– 71
– 81/– 80
0.1
MAX
UNITS
V/µs
V/µs
MHz
MHz
ns
%
ns
ns
dBc
dBc
dBc
Ω
dB
dB
4V Peak (Note 7)
f = 1MHz
A
V
= 10, 10% to 90% of 0.1V, R
L
= 100Ω
A
V
= 10, 0.1V, R
L
= 100Ω
A
V
= 10, 50% V
IN
to 50% V
OUT
, 0.1V, R
L
= 100Ω
6V Step, 0.1%
HD2, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω
HD3, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω
A
V
= 10, f = 0.9MHz, 1MHz, 14dBm, R
L
= 100Ω/25Ω
A
V
= 10, f = 1MHz
V
OUT
=
±4V,
R
L
= 25Ω
q
82
80
92
7
8.25
8.50
Per Amplifier
q
mA
mA
The
q
denotes specifications which apply over the full operating temperature range, otherwise specifications are at T
A
= 25°C.
V
S
=
±2.5V,
V
CM
= 0V, pulse power tested unless otherwise noted. (Note 9)
SYMBOL
V
OS
PARAMETER
Input Offset Voltage
Input Offset Voltage Drift
I
OS
I
B
e
n
i
n
R
IN
C
IN
Input Offset Current
q
CONDITIONS
(Note 5)
q
MIN
TYP
1.5
MAX
5
6
17
350
550
3.5
5.5
UNITS
mV
mV
µV/°C
nA
nA
µA
µA
nV/√Hz
pA/√Hz
MΩ
kΩ
pF
V
V
dB
V/mV
V/mV
V/mV
V/mV
±V
±V
±V
±V
±V
±V
(Note 8)
q
5
100
1.2
Input Bias Current
q
Input Noise Voltage
Input Noise Current
Input Resistance
Input Capacitance
Input Voltage Range (Positive)
Input Voltage Range (Negative)
f = 10kHz
f = 10kHz
V
CM
=
±1V
Differential
q
q
6
2
10
20
50
2
1
75
5.0
4.5
4.5
4.0
1.50
1.40
1.35
1.25
0.87
0.80
2.4
–1.7
91
10
10
1.65
1.50
1
–1
CMRR
A
VOL
Common Mode Rejection Ratio
Large-Signal Voltage Gain
V
CM
=
±1V
V
OUT
=
±1V,
R
L
= 100Ω
q
q
V
OUT
=
±1V,
R
L
= 25Ω
q
V
OUT
Output Swing
R
L
= 100Ω, 10mV Overdrive
q
R
L
= 25Ω, 10mV Overdrive
q
I
OUT
= 200mA, 10mV Overdrive
q
3
LT1886
The
q
denotes specifications which apply over the full operating temp-
erature range, otherwise specifications are at T
A
= 25°C. V
S
=
±2.5V,
V
CM
= 0V, pulse power tested unless otherwise noted. (Note 9)
SYMBOL
I
SC
SR
PARAMETER
Short-Circuit Current (Sourcing)
Short-Circuit Current (Sinking)
Slew Rate
Full Power Bandwidth
GBW
t
r
, t
f
Gain Bandwidth
Rise Time, Fall Time
Overshoot
Propagation Delay
Harmonic Distortion
IMD
R
OUT
Intermodulation Distortion
Output Resistance
Channel Separation
I
S
Supply Current
CONDITIONS
(Note 3)
A
V
= –10 (Note 6)
q
ELECTRICAL CHARACTERISTICS
MIN
TYP
600
400
MAX
UNITS
mA
mA
V/µs
V/µs
MHz
MHz
ns
%
ns
dBc
dBc
dBc
Ω
dB
dB
66
60
100
16
530
7
5
5
– 75/– 64
– 80/– 66
– 77/– 85
0.2
1V Peak (Note 7)
f = 1MHz
A
V
= 10, 10% to 90% of 0.1V, R
L
= 100Ω
A
V
= 10, 0.1V, R
L
= 100Ω
A
V
= 10, 50% V
IN
to 50% V
OUT
, 0.1V, R
L
= 100Ω
HD2, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω
HD3, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω
A
V
= 10, f = 0.9MHz, 1MHz, 5dBm, R
L
= 100Ω/25Ω
A
V
= 10, f = 1MHz
V
OUT
=
±1V,
R
L
= 25Ω
q
82
80
92
5
5.75
6.25
Per Amplifier
q
mA
mA
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The inputs are protected by back-to-back diodes. If the differential
input voltage exceeds 0.7V, the input current should be limited to less than
10mA.
Note 3:
A heat sink may be required to keep the junction temperature
below absolute maximum.
Note 4:
Thermal resistance varies depending upon the amount of PC board
metal attached to the device.
θ
JA
is specified for a 2500mm
2
test board
covered with 2 oz copper on both sides.
Note 5:
Input offset voltage is exclusive of warm-up drift.
Note 6:
Slew rate is measured between
±2V
on a
±4V
output with
±6V
supplies, and between
±1V
on a
±1.5V
output with
±2.5V
supplies.
Note 7:
Full power bandwidth is calculated from the slew rate:
FPBW = SR/2πV
P
.
Note 8:
This parameter is not 100% tested.
Note 9:
The LT1886C is guaranteed to meet specified performance from 0°C
to 70°C. The LT1886C 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. For guaranteed I-grade parts, consult the factory.
Note 10:
The LT1886C is guaranteed functional over the operating temperature
range of –40°C to 85°C.
TYPICAL PERFOR A CE CHARACTERISTICS
Supply Current vs Temperature
15
V
S
=
±6V
COMMON MODE RANGE (V)
10
V
S
=
±2.5V
–0.2
–0.3
1.5
1.0
0.5
T
A
= 25°C
∆V
OS
> 1mV
INPUT BIAS CURRENT (µA)
SUPPLY CURRENT (mA)
5
0
–50
–25
0
25
50
75
TEMPERATURE (°C)
4
U W
100
1886 G01
Input Common Mode Range vs
Supply Voltage
V
+
–0.1
3.0
2.5
2.0
1.5
1.0
0.5
0
Input Bias Current vs Input
Common Mode Voltage
T
A
= 25°C
I
B
= (I
B +
+ I
B –
)/2
V
S
=
±6V
V
S
=
±2.5V
V
–
125
0
2
4
6
8
10
12
TOTAL SUPPLY VOLTAGE (V)
14
–6
–4
–2
0
2
4
INPUT COMMON MODE VOLTAGE (V)
6
1886 G02
1886 G03
LT1886
TYPICAL PERFOR A CE CHARACTERISTICS
Input Bias Current vs
Temperature
3.5
I
B
= (I
B +
+ I
B –
)/2
INPUT VOLTAGE NOISE (nV/√Hz)
3.0
INPUT BIAS CURRENT (µA)
2.5
2.0
1.5
1.0
0.5
0
–50
V
S
=
±6V
100
T
A
= 25°C
A
V
= 101
OUTPUT SHORT-CIRCUIT CURRENT (mA)
V
S
=
±2.5V
–25
0
25
50
75
TEMPERATURE (°C)
Output Saturation Voltage vs
Temperature, V
S
=
±6V
V
+
V
+
OUTPUT SATURATION VOLTAGE (V)
OUTPUT SATURATION VOLTAGE (V)
–0.5
–1.0
–1.5
1.5
1.0
I
L
= 150mA
I
L
= 150mA
R
L
= 100Ω
I
L
= 200mA
I
L
= 200mA
OUTPUT STEP (V)
R
L
= 100Ω
0.5
V
–
–50
–25
0
25
50
75
TEMPERATURE (°C)
Gain and Phase vs Frequency
80
70
60
50
GAIN (dB)
40
30
20
10
0
–10
–20
1M
10M
100M
FREQUENCY (Hz)
T
A
= 25°C
A
V
= –10
R
L
= 100Ω
V
S
=
±2.5V
GAIN
PHASE
V
S
=
±2.5V
V
S
=
±6V
V
S
=
±6V
100
80
GAIN BANDWIDTH (MHz)
60
40
PHASE (DEG)
20
0
–20
–40
–60
–80
–100
1G
1886 G10
OUTPUT IMPEDANCE (Ω)
U W
100
125
1886 G04
Input Noise Spectral Density
100
INPUT CURRENT NOISE (pA/√Hz)
1000
900
800
700
600
500
400
300
200
100
Output Short-Circuit Current vs
Temperature
SOURCE, V
S
=
±6V
SOURCE, V
S
=
±2.5V
SINK, V
S
=
±6V
SINK, V
S
=
±2.5V
10
e
n
i
n
10
∆V
IN
= 0.2V
–25
0
25
50
75
TEMPERATURE (°C)
100
125
1
10
100
1k
10k
FREQUENCY (Hz)
1
100k
1886 G05
0
–50
1886 G06
Output Saturation Voltage vs
Temperature, V
S
=
±2.5V
6
–0.5
–1.0
–1.5
1.5
1.0
0.5
V
–
–50
R
L
= 100Ω
I
L
= 150mA
I
L
= 150mA
I
L
= 200mA
I
L
= 200mA
Settling Time vs Output Step
V
S
=
±6V
R
L
= 100Ω
4
10mV
2
0
–2
–4
10mV
–6
100
125
1mV
1mV
50
60
1886 G09
100
125
–25
0
25
50
75
TEMPERATURE (°C)
0
10
20
30
40
SETTLING TIME (ns)
1886 G07
1886 G08
Gain Bandwidth vs Supply
Voltage
800
T
A
= 25°C
A
V
= –10
700
R
L
= 1k
Output Impedance vs Frequency
100
10
A
V
= 100
1
600
R
L
= 100Ω
R
L
= 25Ω
500
400
0.1
A
V
= 10
300
0
2
4
6
8
10
12
TOTAL SUPPLY VOLTAGE (V)
14
0.01
100k
1M
10M
FREQUENCY (Hz)
100M
1886 G12
1886 G11
5
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