HMC625LP5 Datasheet, PDF (4/10 Pages) Hittite Microwave Corporation – 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN AMPLIFIER, DC - 6 GHz

v01.0907
HMC625LP5 / 625LP5E
0.5 dB LSB GaAs MMIC 6-BIT DIGITAL
VARIABLE GAIN AMPLIFIER, DC - 6 GHz
Serial Mode
The serial mode is enabled then P/S is set to high. Data is entered LSB first and after the 6th shift clock cycle the LE
(Latch Enable) is pulsed High and then Low. See timing diagram below for reference.
Timing Diagram
14
Timing
Parameter
Symbol
Serial Input Setup Time
Hold Time from Serial
Input to Shift Clock
Setup Time from Shift
Clock to Latch Enable
Propagation Delay
Setup Time for New Data
ts
th
tlsup
tpd
tsnd
Vdd = +5V
(Typ.)
20
20
40
10
10
Units
ns
ns
ns
ns
ns
Timing Diagram (Latched Parallel Mode)
Parallel Mode (Direct Parallel Mode & Latched Parallel Mode)
Direct Parallel Mode - The attenuation state is changed by the Control Voltage Inputs directly. The LE (Latch Enable)
must be at a logic high to control the attenuator in this manner.
Latched Parallel Mode - The attenuation state is selected using the Control Voltage Inputs and set while the LE is in
the Low state. The attenuator will not change state while LE is Low. Once all Control Voltage Inputs are at the desired
states the LE is pulsed. See timing diagram below for reference.
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
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