HMMC-3022 Datasheet, PDF (4/9 Pages) Agilent(Hewlett-Packard) – DC-12 GHz High Efficiency GaAs HBT MMIC Divide-by-2 Prescaler

Input Preamplifier Stage
Post Amplifier Stage
2
Figure 1. Simplified Schematic
Applications
The HMMC-3022is designed for use in
high frequency communications, micro-
wave instrumentation, and EW radar
systems where low phase-noise
PLL control circuitry or broad-band
frequency translation is required.
Operation
The device is designed to operate
when driven with either a single-
ended or differential sinusoidal input
signal over a 200 MHz to 12 GHz
bandwidth. Below 200 MHz the
prescaler input is “slew-rate” limited,
requiring fast rising and falling edge
speeds to properly divide. The device
will operate at frequencies down to dc
when driven with a square-wave.
The device may be biased from either
a single positive or single negative
supply bias. The backside of the
device is not dc connected to any
dc bias point on the device.
For positive supply operation V_CC is
nominally biased at any voltage in the
+4.5 to +6.5 volt range with V_EE (or
V_EE & V_PwrSel) grounded. For negative
bias operation V_CC is typically ground-
ed and a negative voltage between
-4.5 to -6.5 volts is applied to V_EE
(or V_EE & V_PwrSel).
Several features are designed into this
prescaler:
1. Dual-Output Power Feature
Bonding both V_EE and V_PwrSel pads to
either ground (positive bias mode) or
the negative supply (negative bias
mode), will deliver ~0 dBm [0.5 V_p–p]
at the RF output port while drawing
~40 mA supply current. Eliminating
the V_PwrSel connection results in re-
duced output power and voltage swing,
-6.0 dBm
[0.25 V_p–p] but at a reduced current
draw of ~30 mA resulting in less over-
all power dissipation.
(NOTE: V_EE must ALWAYS be bonded
and V_PwrSel must NEVER be biased
to any potential other than V_EE or
open–circuited.)
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