HMC759LP3E_10 Datasheet, PDF (4/8 Pages) Hittite Microwave Corporation – 0.25 dB LSB BiCMOS MMIC 7-BIT DIGITAL ATTENUATOR, 10 - 300 MHz

v00.0909
HMC759LP3E
0.25 dB LSB BiCMOS MMIC 7-BIT
DIGITAL ATTENUATOR, 10 - 300 MHz
8
Bias Voltage
Vdd (V)
4.5
5.0
5.5
Idd (Typ.) (µA)
580
650
710
Control Voltage Table
State
Low
High
Vdd = +5V
0 to 0.8V @ <1 µA
2 to 5V @ <1 µA
Parameter
Typ.
Min. serial period, t_SCK
Control set-up time, t_CS
Control hold-time, t_CH
LE setup-time, t_LN
Min. LE pulse width, t_LEW
Min LE pulse spacing, t_LES
Serial clock hold-time from LE, t_CKN
100 ns
20 ns
20 ns
10 ns
10 ns
630 ns
10 ns
Power-Up States
If LE is set to logic LOW at power-up, the logic state
of PUP1 and PUP2 determines the power-up state
of the part per PUP truth table. If the LE is kept high
at power up, power up state will be indeterminate
therefore is not recommended.
Power-On Sequence
The ideal power-up sequence is: GND, Vdd, digital
inputs, RF inputs. The relative order of the digital
inputs are not important as long as they are powered
after Vdd / GND
PUP Truth Table
LE
PUP1
PUP2
0
0
0
0
1
0
0
0
1
0
1
1
1
X
X
Relative Attenuation
-31.75
-24
-16
Insertion Loss
Indeterminate
Truth Table
Control Voltage Input
D6
D5
D4
D3
D2
D1
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
High
Low
High
High
High
High
Low
High
High
High
High
Low
High
High
High
High
Low
High
High
High
High
Low
High
High
High
High
Low
High
High
High
High
High
Low
Low
Low
Low
Low
Low
Any combination of the above states will provide an attenuation equal to the sum of the bits selected.
D0
High
Low
High
High
High
High
High
High
Low
Reference
Insertion Loss
(dB)
0
0.25
0.5
1
2
4
8
16
31.75
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: [phone] Fax: [phone] Order On-line at www.hittite.com
Application Support: Phone: [phone] or [e-mail]
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