ISL55210_14 Datasheet, PDF (1/18 Pages) Intersil Corporation – Wideband, Low-Power, Ultra-High Dynamic Range Differential Amplifier

Wideband, Low-Power, Ultra-High Dynamic Range
Differential Amplifier
ISL55210
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 2V_P-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.
Features
• Gain Bandwidth Product . . . . . . . . . . . . . . . . . . . . . . . . 4.0GHz
• Input Voltage Noise . . . . . . . . . . . . . . . . . . . . . . . 0.85nV/√(Hz)
• Differential Slew Rate . . . . . . . . . . . . . . . . . . . . . . . 5,600V/µs
• 2V_P-P, 2-tone IM3 (200Ω) 100MHz . . . . . . . . . . . . . . -109dBc
• 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
• Differential Comms-DAC Output Driver
Related Products and
Literature
• ISL55211 - Fixed Gain Version of the ISL55210
• ISLA112P50 - 12-bit, 500MSPS ADC (<500mW)
• ISLA214P50 - 14-bit, 500MSPS ADC (<850mW)
• AN1649 - Designer’s Guide to the ISL55210 and ISL55211
Evaluation Boards
• AN1725 - Ultra Low Power Broadband 8 to 14-Bit Data
Acquisition Platform
• AN1837 - Ultra High Performance Broadband 12 to 16-Bit
Data Acquisition Platform
• AN1831 - Designer's Guide to the ISL55210-ABEVAL1Z
Active Balun Evaluation Board
+3.3V
105MHz SINGLE TONE
180mVpp for -1dBFS
100
Vi
1:2
0.1µF
50
Vcm
35mA
495
(115mW)
10k
500kHz 180MHz SPAN
ISLA112P50
12 Bit
+
40.2
V+ _<500mW
0.1µF
33nH
20pF
PD
210
Vb
ISL55210
Vdiff
ADT4-1WT
-
100
495
0.1µF
210
33nH
20pF
V-
40.2
CLK
500MSPS
Vdiff
20log ( _Vi ) = 17.3dB gain
FIGURE 1. TYPICAL APPLICATION CIRCUIT
SNRFS = 64.9dBFS
HD2 = -83dBc
HD3 = -84dBc
ENOBFS = 10.5 Bits
June 6, 2013
1
FN7811.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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