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4305-01

Description
7-Channel Precision Temperature Monitor
File Size876KB,11 Pages
ManufacturerpSemi (peregrine semiconductor)
Websitehttp://www.psemi.com/
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4305-01 Overview

7-Channel Precision Temperature Monitor

Product Specification
PE4305
Product Description
The PE4305 is a high linearity, 5-bit RF Digital Step Attenuator
(DSA) covering a 15.5 dB attenuation range in 0.5 dB steps,
and is pin compatible with the PE430x series. This 50-ohm RF
DSA provides both parallel (latched or direct mode) and serial
CMOS control interface, operates on a single 3-volt supply and
maintains high attenuation accuracy over frequency and
temperature. It also has a unique control interface that allows
the user to select an initial attenuation state at power-up. The
PE4305 exhibits very low insertion loss and low power
consumption. This functionality is delivered in a 4x4 mm QFN
footprint.
The PE4305 is manufactured on Peregrine’s UltraCMOS™
process, a patented variation of silicon-on-insulator (SOI)
technology on a sapphire substrate, offering the performance
of GaAs with the economy and integration of conventional
CMOS.
Figure 1. Functional Schematic Diagram
RF Input
50
RF Digital Attenuator
5-bit, 15.5 dB, DC – 4.0 GHz
Features
Attenuation: 0.5 dB steps to 15.5 dB
Flexible parallel and serial programming
interfaces
Latched or direct mode
Unique power-up state selection
Positive CMOS control logic
High attenuation accuracy and linearity
over temperature and frequency
Very low power consumption
Single-supply operation
50
impedance
Pin compatible with PE430x series
Packaged in a 20 Lead 4x4 mm QFN
Switched Attenuator Array
Parallel Control
Serial Control
5
Power-Up Control
Table 1. Electrical Specifications @ +25°C, V
DD
= 3.0 V
Parameter
Insertion Loss
2
BS
C
3
1
Control Logic Interface
Test Conditions
W
Frequency
O
IT
RF Output
LE
H
PE
T
4x4 mm 20-Lead QFN
Figure 2. Package Type
Minimum
DC
-
-
30
-
15
-
Typical
1.5
-
34
52
20
-
43
12
Maximum
4000
2.25
±(0.25 + 3% of atten setting)
not to exceed ± 0.4 dB
-
-
-
1
E
Units
MHz
dB
dB
dBm
dBm
dB
µs
O
Attenuation Accuracy
1 dB Compression
3
Input IP3
1, 2
Return Loss
Switching Speed
Operation Frequency
EP
LA
Any Bit or Bit
Combination
Two-tone inputs
+18 dBm
50% control to 0.5 dB
of final value
R
Notes: 1. Device Linearity will begin to degrade below 1Mhz
2. See Max input rating in Table 3 & Figures on Pages 2 to 4 for data across frequency.
3. Note Absolute Maximum in Table 3.
Document No. 70-0159-06
www.psemi.com
©2003-2008 Peregrine Semiconductor Corp. All rights reserved.
Page 1 of 11
E
DC - 2.2 GHz
DC - 2.2 GHz
1 MHz - 2.2 GHz
1 MHz - 2.2 GHz
DC - 2.2 GHz

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