SKY12343-364LF-EVB Skyworks Solutions Inc, SKY12343-364LF-EVB Datasheet - Page 3

• Manufacturer Part Number: SKY12343-364LF-EVB
• Description: BOARD EVAL FOR SKY12343-364
• Manufacturer: Skyworks Solutions Inc
• Type: Attenuatorr

Specifications of SKY12343-364LF-EVB

• Frequency: 100MHz ~ 4GHz
• For Use With/related Products: SKY12343-364
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 863-1326

Functional Description
The SKY12343-364LF is a seven-bit digital attenuator comprised
of a GaAs attenuator and a silicon CMOS driver. The attenuation
setting is controlled by a serial or parallel interface. Attenuation is
set by a stream of data that is clocked into the shift registers of
the silicon chip by the CLOCK signal.
Pin 3 (P/S) selects the input mode of the attenuator. A logic low
signal applied to pin 3 enables parallel mode; a logic high enables
serial mode.
Serial Data Programming
Serial input data (DATA_IN pin) is shifted into the register on the
rising edge of the clock signal (CLOCK pin), Least Significant Bit
(LSB) first. The attenuator changes states on the rising edge of the
latch enable signal (LATCH_ENABLE pin) according to the most
Table 2. Power-Up/Power-Down Timing Parameters
LATCH ENABLE setup time
DATA_IN setup time
DATA_IN hold time
LATCH ENABLE hold time
CLOCK frequency
CLOCK period
LATCH_ENABLE
Parameter
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [e-mail] • www.skyworksinc.com
DATA_IN
201355A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • October 11, 2010
CLOCK
T1
D6 (MSB)
T1
T2
T3
T4
f
T5
CLK
T2
Symbol
Figure 3. Power-Up/Power-Down Timing
T3
T5
Minimum
Data Feedthrough
7.5
7.5
5
5
most recent seven bits of shifted data accepted since the previous
falling edge of the latch enable signal.
Refer to the timing diagram in Figure 3 and timing parameters in
Table 2.
Electrical and Mechanical Specifications
The absolute maximum ratings of the SKY12343-364LF are
provided in Table 3. Electrical specifications are provided in
Table 4.
Typical performance characteristics of the SKY12343-364LF are
illustrated in Figures 4 through 17.
The state of the SKY12343-364LF is determined by the logic
provided in Table 5.
DATA SHEET • SKY12343-364LF SEVEN-BIT DIGITAL ATTENUATOR
Typical
1/f
15
15
10
10
16
CLK
Maximum
D0 (LSB)
100
T4
S2186
Units
MHz
ns
ns
ns
ns
3