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LT1969CMS#PBF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
1
LT1969
Dual 700MHz, 200mA,
Adjustable Current Operational Amplifier
■
700MHz Gain Bandwidth
■
±200mA Minimum I
OUT
■
Adjustable Quiescent Current
■
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
■
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
®
1969 is an adjustable current version of the
popular LT1886, a 200mA minimum output current, dual
op amp with outstanding distortion performance. The
adjustable current feature is highly desirable in applica-
tions where minimum power dissipation is required while
still being able to provide adequate line termination.
At nominal supply current, the amplifiers are gain of 10
stable and can easily be compensated for lower gains. The
LT1969 features balanced high impedance inputs with
4µA 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
making it useful in buffer and cable driver applications.
The LT1969 is manufactured on Linear Technology’s
advanced low voltage complementary bipolar process and
is available in a thermally enhanced MS10 package
■
DSL Modems
■
xDSL PCI Cards
■
USB Modems
■
Line Drivers
Single 12V Supply ADSL Modem Line Driver
ADSL Modem Line Driver Distortion
, LTC and LT are registered trademarks of Linear Technology Corporation.
–
+
1/2 LT1969
12.4Ω
1:2*
12V
909Ω
100Ω
100Ω
20k10k
IN
–
IN
+
10k 20k
1µF
1µF
0.1µF
0.1µF
–
+
1/2 LT1969
12.4Ω
1969 TA01a
909Ω
100Ω
13k
*COILCRAFT X8390-A
OR EQUIVALENT
6
49.9k
STANDBY ON
I
Q
ON = 14mA
I
Q
LOW POWER = 2mA
I
Q
STANDBY = 600µA
LOGIC
OUTPUT
CTRL1 CTRL2
7
STANDBY
LOW POWER
ON
LINE VOLTAGE (V
P-P
)
0
HARMONIC DISTORTION (dBc)
–60
–70
–80
–90
–100
1969 TA01b
2 4 6 8 10 12 14 16
V
S
= 12V
A
V
= 10
f = 200kHz
100Ω LINE
1:2 TRANSFORMER
HD2
HD3
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
2
LT1969
WU
U
PACKAGE
/
O
RDER I FOR ATIO
LT1969CMS
T
JMAX
= 150°C, θ
JA
= 110°C/W (NOTE 4)
ORDER PART
NUMBER
ELECTRICAL CHARACTERISTICS
The ● 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, nominal mode with a 13k resistor from CTRL1 to V
–
and
a 49.9k resistor from CTRL2 to V
–
, pulse power tested unless otherwise noted. (Note 9)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 5) 1 4 mV
● 5mV
Input Offset Voltage Drift (Note 8) ● 317µV/°C
I
OS
Input Offset Current 150 400 nA
● 600 nA
I
B
Input Bias Current 1.5 4 µA
● 6 µA
e
n
Input Noise Voltage f = 10kHz 6 nV/√Hz
i
n
Input Noise Current f = 10kHz 2 pA/√Hz
R
IN
Input Resistance V
CM
= ±4.5V 5 10 MΩ
Differential 35 kΩ
C
IN
Input Capacitance 2pF
Input Voltage Range (Positive) ● 4.5 5.9 V
Input Voltage Range (Negative)
● –5.2 –4.5 V
CMRR Common Mode Rejection Ratio V
CM
= ±4.5V ● 77 98 dB
Minimum Supply Voltage Guaranteed by PSRR ● ±2V
PSRR Power Supply Rejection Ratio V
S
= ±2V to ±6.5V 80 86 dB
● 78 dB
A
VOL
Large-Signal Voltage Gain V
OUT
= ±4V, R
L
= 100Ω 5.0 12 V/mV
● 4.5 V/mV
V
OUT
= ±4V, R
L
= 25Ω 4.5 12 V/mV
● 4.0 V/mV
V
OUT
Output Swing R
L
= 100Ω, 10mV Overdrive 4.85 5 ±V
● 4.70 ±V
R
L
= 25Ω, 10mV Overdrive 4.30 4.6 ±V
● 4.10 ±V
I
OUT
= 200mA, 10mV Overdrive 4.30 4.5 ±V
● 4.10 ±V
MS10 PART MARKING
LTTN
ABSOLUTE MAXIMUM RATINGS
W
WW
U
(Note 1)
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 Consult factory for parts specified with wider operating temperature ranges.
1
2
3
4
5
V
+
OUTA
–INA
+INA
V
–
10
9
8
7
6
OUTB
–INB
+INB
CTRL2
CTRL1
TOP VIEW
MS10 PACKAGE
10-LEAD PLASTIC MSOP
3
LT1969
ELECTRICAL CHARACTERISTICS
The ● 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, nominal mode with a 13k resistor from CTRL1 to V
–
and
a 49.9k resistor from CTRL2 to V
–
, pulse power tested unless otherwise noted. (Note 9)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
SC
Short-Circuit Current (Sourcing) (Note 3) 700 mA
Short-Circuit Current (Sinking) 500 mA
SR Slew Rate A
V
= –10 (Note 6) 100 200 V/µs
Full Power Bandwidth 4V Peak (Note 7) 8 MHz
GBW Gain Bandwidth f = 1MHz 700 MHz
t
r
, t
f
Rise Time, Fall Time A
V
= 10, 10% to 90% of 0.1V, R
L
= 100Ω 4ns
Overshoot A
V
= 10, 0.1V, R
L
= 100Ω 1%
Propagation Delay A
V
= 10, 50% V
IN
to 50% V
OUT
, 0.1V, R
L
= 100Ω 2.5 ns
t
S
Settling Time 6V Step, 0.1% 50 ns
Harmonic Distortion HD2, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω –75/–63 dBc
HD3, A
V
= 10, 2V
P-P
, f = 1MHz, R
L
= 100Ω/25Ω –85/–71 dBc
IMD Intermodulation Distortion A
V
= 10, f = 0.9MHz, 1MHz, 14dBm, R
L
= 100Ω/25Ω –81/–80 dBc
R
OUT
Output Resistance A
V
= 10, f = 1MHz 0.1 Ω
I
S
Supply Current Per Amplifier 7 8.25 mA
● 8.50 mA
CTRL1 Voltage 13k to V
–
, Measured with Respect to V
–
0.77 0.97 1.25 V
● 0.74 1.30 V
CTRL2 Voltage 49.9k to V
–
, Measured with Respect to V
–
0.87 1.05 1.18 V
● 0.80 1.25 V
Minimum Supply Current per Amplifier; CTRL1, CTRL2 Open 300 800 µA
● 1100 µA
Maximum Supply Current per Amplifier; CTRL1 or CTRL2 Shorted to V
–
13 mA
The ● 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, nominal mode with a 13k resistor from CTRL1 to V
–
and a 49.9k resistor from CTRL2 to V
–
, pulse power tested
unless otherwise noted. (Note 9)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OS
Input Offset Voltage (Note 5) 1.5 5 mV
● 6mV
Input Offset Voltage Drift (Note 8) ● 517µV/°C
I
OS
Input Offset Current 100 350 nA
● 550 nA
I
B
Input Bias Current 1.2 3.5 µA
● 5.5 µA
e
n
Input Noise Voltage f = 10kHz 6 nV/√Hz
i
n
Input Noise Current f = 10kHz 2 pA/√Hz
R
IN
Input Resistance V
CM
= ±1V 10 20 MΩ
Differential 50 kΩ
C
IN
Input Capacitance 2pF
Input Voltage Range (Positive) ● 1 2.4 V
Input Voltage Range (Negative)
● –1.7 –1 V
CMRR Common Mode Rejection Ratio V
CM
= ±1V ● 75 91 dB
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

LT1969CMS#PBF

Mfr. #:
Buy LT1969CMS#PBF
Manufacturer:
Analog Devices Inc.
Description:
High Speed Operational Amplifiers 700MHz Dual 200mA OA with programmable I supply in MS10
Lifecycle:
New from this manufacturer.
Delivery:
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