HMC542LP4_10 Datasheet, PDF (3/8 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL SERIAL CONTROL ATTENUATOR, DC - 3 GHz

HMC542LP4 / 542LP4E
v03.0809
5
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR, DC - 3 GHz
ED _{Worst Case Step Error}
U _{Between Successive Attenuation States}
TIN ¹
0.8
N _0.6
ISCO ^{T 0.4}
0.2
D ^{DUC esigns 0}
-0.2
O ^{ew D -0.4}
PR ^{for N -0.6}
ended -0.8
-1
m _{0 0.5 1 1.5 2 2.5 3 3.5 4}
Not ^{Recom FREQUENCY (GHz)}
Digital Control Voltages
State
Low
High
Vcc = +5V
0 to 1.3V
3.5 to 5V
Serial Input Truth Table
Latch
Enable
X
X
Shift
Clock
X
á
á
X
Reset
L
H
H
Function
Shift register cleared
Shift register clocked
Contents of shift register
transferred to Digital
Attenuator
Timing
Truth Table
Parameter
Serial Input Setup Time
Hold time from Serial
Input to Shift Clock
Setup time from Shift
Clock to Latch Enable
Latch Enable Window,
Latch Enable to C0.5
through C8
Setup time from Reset to
Shift Clock
Clock Frequency
(1/tclk)
Symbol
ts
th
tlsup
tpd
-
fclk
Vcc = +5V
Min. Max.
20
-
0
-
40
-
-
30
20
-
-
30
Units
ns
ns
ns
ns
ns
MHz
Control Voltage Input
C16 C8
C4
C2
C1 C0.5
High
High
High
High
High
High
Reference
I.L.
High High High High High Low
0.5 dB
High High High High Low High
1 dB
High High High Low High High
2 dB
High High Low High High High
4 dB
High Low High High High High
8 dB
Low High High High High High
16 dB
Low Low Low Low Low Low
31.5 dB
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Timing Diagram
5-3
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com