ISL55210

Wideband, Low-Power, Ultra-High Dynamic Range Differential Amplifier

Product Status: Mass Production

OVERVIEW

The ISL55210 is a very wide band, Fully Differential Amplifier (FDA) intended for high dynamic range ADC input interface applications. This voltage feedback FDA design includes an independent output common mode voltage control.

Intended for very high dynamic range ADC interface applications, at the lowest quiescent power (115mW), the ISL55210 offers a 4.0GHz Gain Bandwidth Product with a very low input noise of 0.85nV/√(Hz). In a balanced differential I/O configuration, with 2VP-P output into a 200Ω load configured for a gain of 15dB, the IM3 terms are <-100dBc through 110MHz. With a minimum operating gain of 2V/V (6dB), the ISL55210 supports a wide range of higher gains with minimal BW or SFDR degradation. Its ultra high differential slew rate of 5,600V/µs ensures clean large signal SFDR performance or a fast settling step response.

The ISL55210 requires only a single 3.3V (max 4.2V) power supply with 35mA typical quiescent current. This industry leading low current solution can be further reduced when needed using the optional power shutdown to <0.4mA supply current. External feedback and gain setting resistors give maximum flexibility and accuracy. A companion device, the ISL55211, includes on-chip feedback and 3 possible gain setting connections where an internally fixed gain solution is preferred. The ISL55210 is available in a leadless, 16 Ld TQFN package and is specified for operation over the -40ºC to +85ºC ambient temperature range.

KEY FEATURES

  • Gain Bandwidth Product: 4.0GHz
  • Input Voltage Noise: 0.85nV/√(Hz)
  • Differential Slew Rate: 5,600V/µs
  • 2VP-P, 2-tone IM3 (200Ω) 100MHz: -109dBc
  • Supply Voltage Range: 3.0V to 4.2V
  • Quiescent Power (3.3V Supply): 115mW

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL55210
Basic Information
Production Status
Mass Production
# of Devices/ Channels
1
Bandwidth (MHz)
2200
Slew Rate (V/μs)
5600
VS (min)
3 V
VS (max)
4.2 V
IS (per amp)
35 mA
Noise VN (nV/√Hz)
0.85
IBIAS
50 µA
IBIAS (max)
90 µA
Max Offset Voltage
1.4 mV
IOUT
45 mA
VOUT (V)
3.8
Rail-to-Rail Input
No
Rail-to-Rail Output
No
PSRR (dB)
90
CMRR (dB)
75
Thermal Shutdown
No
Gain Min
2
AVOL (dB)
100
Enable
Yes
Topology
FDA
Distortion Conditions
2Vpp, 20MHz
Output Headroom (V)
1
Qualification Level
Standard
Can Sample
YES
Temperature Range
-40 to +85

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