The ISL55211 is a wideband, differential input to differential

output amplifier offering 3 possible internal gain settings.

Using fixed 500Ω internal feedback resistors, the amplifier

may be configured for a differential gain of 2, 4 or 5V/V

depending on which combination of input pins are connected

to the signal source. Internal feedback capacitors controls the

signal bandwidth to be a constant 1.4GHz in all gain settings.

Ideally suited for AC-coupled data acquisition applications, the

output DC common mode voltage is controlled through an

external VCM pin or left to default to 1.2V above the negative

supply pin. Where the differential signal source is AC-coupled,

the input common mode voltage will equal the output

common mode voltage.

Intended for very high dynamic range ADC interface

applications, the ISL55211 offers 5600V/µs differential slew

rate, 100dBc SFDR to

>100MHz for 2VP-P 2-tone 3rd order intermodulation. Its

balanced architecture effectively suppresses even order

distortion terms - an important issue for very wide band 1st

Nyquist zone ADC interface applications. Minimum gain

operation of 2V/V (6dB) with <1dB peaking ensures stable

performance over-temperature. It's ultra high differential slew

rate of 5600V/µs provides adequate performance margin for

large signal application through 500MHz.

The ISL55211 requires only a single 3.3V (max. 4.2V) power

supply and 35mA quiescent current, providing a very low

power solution (115mW). Further power savings are possible

using the optional power shutdown control - where the

quiescent current can be reduced to <0.4mA. A companion

device, the ISL55210, offers similar performance where the

feedback and gain resistors are external. Both are available in

a 16 Ld TQFN (Pb-free) package and are specified for

operation over the -40°C to +85°C ambient temperature

range.

Features

• 3 Fixed Gain Options . . . . . . . . . . . . . . . . . . . . . . . 2, 4, or 5V/V

• Constant Bandwidth Over Gain . . . . . . . . . . . . . . . . . . 1.4GHz

• Differential Slew Rate . . . . . . . . . . . . . . . . . . . . . . . 5,600V/µs

• 2VP-P, 2-tone IM3 (200Ω) 100MHz . . . . . . . . . . . . . . -103dBc

• Low Differential Output Noise (Gain 5V/V) . . . . . . <12nV/√Hz

• Supply Voltage Range . . . . . . . . . . . . . . . . . . . . . . 3.0V to 4.2V

• Quiescent Power (3.3V Supply) . . . . . . . . . . . . . . . . . .115mW

Applications

• Low Power, High Dynamic Range ADC Interface

• Differential Mixer Output Amplifier

• SAW Filter Pre/Post Driver

• Fixed Gain Coax Receiver