LT1886_15 Datasheet, PDF (1/16 Pages) Linear Technology – Dual 700MHz, 200mA Operational Amplifier

LT1886
Dual 700MHz, 200mA
Operational Amplifier
FEATURES
s _{700MHz Gain Bandwidth}
s _{±200mA Minimum IOUT}
s _{Low Distortion: –72dBc at 1MHz, 4VP-P, 25Ω, AV = 2}
s _{Stable in AV ≥ 10, Simple Compensation for AV < 10}
s _{±4.3V Minimum Output Swing, VS = ±6V, RL = 25Ω}
s _{7mA Supply Current per Amplifier}
s _{200V/µs Slew Rate}
s _{Stable with 1000pF Load}
s _{6nV/√Hz Input Noise Voltage}
s _{2pA/√Hz Input Noise Current}
s _{4mV Maximum Input Offset Voltage}
s _{4µA Maximum Input Bias Current}
s _{400nA Maximum Input Offset Current}
s _{±4.5V Minimum Input CMR, VS = ±6V}
s _{Specified at ±6V, ±2.5V}
U
APPLICATIO S
s _{DSL Modems}
s _{xDSL PCI Cards}
s _{USB Modems}
s _{Line Drivers}
DESCRIPTIO
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.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
Single 12V Supply ADSL Modem Line Driver
12V
0.1µF
IN ⁺
10k 20k
+
1/2 LT1886
–
909Ω
12.4Ω
100Ω
1:2*
1µF 10k 20k
0.1µF
IN ^–
1µF 100Ω
909Ω
–
1/2 LT1886
+
12.4Ω
1886 TA01
*COILCRAFT X8390-A
OR EQUIVALENT
100Ω
ADSL Modem Line Driver Distortion
–60
V_S = 12V
A_V = 10
f = 200kHz
–70 100Ω LINE
1:2 TRANSFORMER
HD2
–80
–90
HD3
–100
0 2 4 6 8 10 12 14 16
LINE VOLTAGE (V_P-P)
1886 TA01a
1