HMC661LC4B Datasheet, PDF (12/14 Pages) Hittite Microwave Corporation – ULTRA-WIDEBAND 4 GS/s TRACK-AND-HOLD AMPLIFIER

HMC661LC4B
v00.0312
ULTRA-WIDEBAND 4 GS/s TRACK-AND-HOLD AMPLIFIER
DC - 18 GHz
Pin Descriptions
Pin Number
Function
1, 2, 5, 13,
14, 17, 18
GNDa
3
INP
4
INN
6
VeeCLK
Description
Analog ground. This ground and clock ground must
be connected to the same DC potential but they can be
RF-isolated from each other if desired.
Positive T/H input. Has on-chip DC 50 Ω termination,
nominal max single-ended input level = ±0.25 V (-2 dBm)
for specified performance, +10 dBm max.
Negative T/H input. Has on-chip DC 50 Ω termination,
nominal max single-ended input level = ±0.25 V (-2 dBm)
for specified performance, +10 dBm max.
Negative clock buffer supply. VeeCLK and Vee must be
connected to the same potential. Total (Vee+VeeCLK)
nominal current is -242 mA at -4.75 V.
7
VccCLK
Clock buffer power. Requires 26 mA nominal current at 2 V.
8, 11, 12
GNDc
Clock ground. This ground and analog ground must be
connected to the same DC potential but they can be
RF-isolated from each other.
9,10
CLKN, CLKP
Negative CLK input, Positive CLK input. Has on-chip 50 Ω
termination, +10 dBm max.
Interface Schematic
15, 16
OUTP, OUTN
Positive T/H RF output, Negative T/H RF output. 50 Ω
output impedance, nominal DC common mode output
voltage = 0 V. 50 Ω load impedance can be DC or AC
coupled.
19, 21, 24,
Package
Base
20
22
23
Vee
VccOB
VccOF
VccTH
Negative analog supply. Total (Vee+VeeCLK) current is
-242 mA @ -4.75 V
50 Ω output buffer power. VccOB current is 73 mA @ 2 V.
The output common mode voltage can be adjusted by the
user by varying VccOB in the range of +1 V to +3 V such
that Vocm~1/2(VccOB-2) for DC coupled output.
Output buffer supply. Requires a nominal current of 40 mA
at 2 V.
T/H core supply.
Requires nominal current of 82 mA at 2 V.
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
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