Low Cost, Dual, High Current Output

Line Driver with Shutdown

ADA4311-1

Rev. 0

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FEATURES

High speed

−3 dB bandwidth: 310 MHz, G = +5, RLOAD = 50 Ω

Slew rate: 1050 V/μs, RLOAD = 50 Ω

Wide output swing

20.6 V p-p differential, RLOAD of 100 Ω from 12 V supply

High output current

Low distortion

−98 dBc typical at 1 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω

−72 dBc typical at 10 MHz, VOUT = 2 V p-p, G = +5, RLOAD = 100 Ω

Power management and shutdown

Control inputs CMOS level compatible

Shutdown quiescent current: 1 mA/amplifier

Selectable quiescent current: 1 mA to 11.8 mA/amplifier

APPLICATIONS

Home networking line drivers

Twisted pair line drivers

Power line communications (PLC)

Video line drivers

ARB line drivers

I/Q channel amplifiers

PIN CONFIGURATION

NC = NO CONNECT

+VS 1

NC 2

OUT A 3

–IN A 4

+IN A 5

OUT B

10

–IN B

9

+IN B

8

PD1

7

PD0

6

ADA4311-1

Figure 1. Thermally Enhanced, 10-Lead MINI_SO_EP

TYPICAL APPLICATION

VMID*

ADA4311-1

ADA4311-1

1/2

1/2

*VMID =

VCC – GND

2

Figure 2. Typical PLC Driver Application

GENERAL DESCRIPTION

The ADA4311-1 is comprised of two high speed, current

feedback operational amplifiers. The high output current, high

bandwidth, and fast slew rate make it an excellent choice for

broadband applications requiring high linearity performance

while driving low impedance loads.

The ADA4311-1 incorporates a power management function

that provides shutdown capabilities and the ability to optimize

the quiescent current of the amplifiers. The CMOS-compatible,

power-down control pins (PD1 and PD0) enable the ADA4311-1

to operate in four different modes: full power, medium power,

low power, and complete power-down. In power-down mode, the

quiescent current drops to only 1.0 mA/amplifier, while the outputs

go to a high impedance state.

The ADA4311-1 is available in a thermally enhanced, 10-lead

MSOP with an exposed paddle for improved thermal conduction.

The ADA4311-1 is rated to work in the extended industrial

temperature range of −40°C to +85°C.