HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
31.0 dB, DC-2.5GHz, 5 Bit
Serial Digital Attenuator
Features
x Very Low DC Power Consumption
x Attenuation In Steps From 1 dB To 31 dB
x Single Or Dual Power Supply Voltages
x Serial Data Interface
x 50 Ohm Compatible Impedance
x Space Saving VQFN Surface Mount Packaging
Product Description
The Honeywell HRF-AT4521 is a 5-bit digital
attenuator that is ideal for use in broadband
communication system applications that require
accuracy, speed and low power consumption. The
HRF-AT4521 is manufactured with Honeywell's
patented Silicon On Insulator (SOI) CMOS
manufacturing technology, which provides the
performance of GaAs with the economy and
integration capabilities of conventional CMOS.
HRF-AT4521 in VQFN Package
RF Electrical Specifications @ + 25oC
Results @ Vdd = 5.0 +/- 10%, Vss = 0 unless otherwise stated, Z0 = 50 Ohms
Contact Honeywell for relative performance at other supply configurations
Parameter Test Condition Frequency Minimum Typical Maximum Units
Insertion Loss* DC – 1.0 GHz
2.0 GHz
2.5 GHz
2.0
2.2
2.8
2.6
2.8
3.4
dB
dB
dB
1dB Compression* VSS = 0V, Input Power DC – 2.5 GHz 24 dBm
1dB Compression* VSS = - VDD, Input Power DC – 2.5 GHz 29 dBm
Input IP3* VSS = 0V Two-tone inputs
Up To +5 dBm @ 0 dBm
Attenuation
DC – 2.5 GHz 38 dBm
Input IP3* Vss = - VDD
Two-tone inputs Up To + 5
dBm @ 0 dBm Attenuation
DC – 2.5 GHz >38 dBm
Return Loss* Any Combination of Bits DC – 2.5 GHz 11 13 dB
Attenuation Accuracy
(States < 8 dB are
GBD*)
All attenuation states
All attenuation states
All attenuation states
DC – 1.0 GHz
2.0 GHz
2.5 GHz
+/-(0.45 + 3.0% of programmed IL)
+/-(0.55 + 4.5% of programmed IL)
+/-(0.6 + 8% of programmed IL)**
dB
dB
dB
Trise, Tfall*
Ton, Toff (Tpd)
Transients
10% To 90%
50% Cntl To 90%/10%RF
In-Band
10
15
30
nS
nS
mV
T clock Period (Tprd)* T high / T low = ½ minimum clock period 50 nS
T data set up (Tsup)* Set up to rising edge of clock 5 nS
T data hold (Thld)* Data hold after rising edge of clock 2 nS
T latch set up (Tlsup)* Data set up to rising edge of OE 5 nS
0.01uF Decoupling Capacitors Required On Power Supply Rails.
*Guaranteed by design
**For higher accuracy designs, please consider HRFAT4610/HRF-AT4611
12001 State Highway 55
2004 4521W Published August 2004 Page 1 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Functional Schematic
RF In RF Out
CLK DATA OE
16dB 8dB 4dB 2dB 1dB
ESD, Registers, Buffer, Level Shift
DC Electrical Specifications @ + 25oC
Parameter Minimum Typical Maximum Units
VDD 3.3 15.0 5.5 V
VSS -5.0 V
IDD Power Supply Current 35 uA
CMOS Logic level (0) 0 0.8 V
CMOS Logic level (1) VDD – 0.8 VDD V
Input Leakage Current 10 uA
Note 1, the performance curves are for Vdd = +5.0 +/- 10%
Absolute Maximum Ratings2
Parameter Absolute Maximum Units
Input Power + 35 dBm
VDD +6.0 V
VSS -5.5 V
ESD Voltage 400 V
Operating Temperature -40 To +85 Degrees C
Storage Temperature -65 To +125 Degrees C
Digital Inputs VDD+0.6 max to -0.6 min V
(Note 2) Operation of this Device beyond any of these parameters may cause permanent damage.
Latch-Up: Unlike conventional CMOS digital attenuators, Honeywells' HRF-AT4521 is immune to latch-up.
ESD Protection: Although the HRF-AT4521 contains ESD protection circuitry on all digital inputs, conventional precautions should be
taken to ensure that the Absolute Maximum Ratin
g
s are not exceeded.
12001 State Highway 55
2004 4521W Published August 2004 Page 2 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Package Outline Drawing
This package conforms to the JEDEC Standard MO-220, 4 x 4 mm 16 lead body
dimensions.
See Application Note 310, VQFN Surface Mount Application, on our web site at
www.mysoiservices.com for assembly recommendations.
Pin Configuration
Pin Function Pin Function
1 VDD 9 GROUND
2 GROUND 10 RF OUTPUT
3 RF INPUT 11 GROUND
4GROUND12 VSS
5 GROUND 13 GROUND
6 GROUND 14 OE
7 GROUND 15 CLK
8GROUND16 DATA
Note: Bottom ground plate must be grounded for proper RF performance.
Serial Data Load
Serial data is shifted into the register on the rising edge of clock, MSB first. The state of “OE” will not affect the shifting
of data. The rising edge of the “OE” signal will be the clock for the transfer of shifted data. Latched new data occurs
one prop delay after the rising edge of “OE”. See the Electrical Spec Table for AC parameters.
12001 State Highway 55
2004 4521W Published August 2004 Page 3 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Truth Table
S4 S3 S2 S1 S0 Output
0
0
0
0
0
1
1
0
0
0
0
1
0
1
0
0
0
1
0
0
1
0
0
1
0
0
0
1
0
1
0
0
0
0
1
Reference Input
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Operation: Data on serial input D is clocked into internal registers on the low to high transition of the Clock signal (CK). The register
output is enabled when Output Enable (OE) is in the low state. "0" = CMOS Low, "1" = CMOS High.
Evaluation Circuit Board
HRF-AT4521 Evaluation Board
Honeywell's evaluation board provides an
easy to use method of evaluating the RF
performance of our attenuator. Simply
connect power, DC and RF signals to be
measuring switch performance in less than 10
minutes.
Evaluation Circuit Board Layout Design Details
Item Description
PCB Impedance Matched Multi-Layer FR4
Attenuator HRF-AT4521 Digital Attenuator
Chip Capacitor Panasonic Model ECU-E1C103KBQ Capacitor, .01uf 0402 10% 16V
RF Connector Johnson Connectors Model 142-0701-801 SMA RF Coaxial Connector
DC Pin Mil-Max Model 800-10-064-10-001 Header Pins
12001 State Highway 55
2004 4521W Published August 2004 Page 4 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Evaluation Circuit Board Connections
Performance Curves
Insertion Loss
This Insertion Loss curve represents
the Min/Max conditions for the “0”
pass state versus all processing and
temperature conditions. The Min
case is at –40C with the “Fast”
processing conditions. The Max case
is at +85C with the “Slow” processing
conditions. All other combinations fall
within that band. The typical 25C
case is labeled +25C TT.
HRF-AT4521
Evaluation Board
Top View
HRF-AT4521
Honeywell
RF In RF Out
VDD
VSS
Gnd
Gnd Data
CLK
OE
12001 State Highway 55
2004 4521W Published August 2004 Page 5 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Return Loss
This Return Loss set of curves
represents the combination of all Return
Loss cases for all attenuation settings.
All cases are better than –14dB Return
Loss at 4GHz.
Attenuation State Accuracy
The Attenuation Accuracy curve
with vertical axis of +/- 1dB
shows all states better than +/-
0.5dB to 2GHz and better than
+/- 0.8dB to 4GHz.
12001 State Highway 55
2004 4521W Published August 2004 Page 6 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Compression
The P1dB curve shows all states with a
P1dB compression at approximately 23dB
input power. The conditions for this curve
are Vdd = +5.0v and Vss = 0v. For highe
r
P1dB compression values, supply Vss with
a negative voltage as shown in the next
curve.
The P1dB curve shows all states with a P1dB
compression at approximately 31dB inpu
t
power. The conditions for this curve are Vdd =
+5.0v and Vss = -5.0v.
12001 State Highway 55
2004 4521W Published August 2004 Page 7 Plymouth, Minnesota 55441-4799
1-800-323-8295
HRF-AT4521
Preliminary
________________________________________________________________________________________________________
Web Site: www.mysoiservices.com Honeywell
Email: mysoiservices@honeywell.com Solid State Electronics Center
Ordering Information
Ordering Number Delivery Method Units Per Shipment
HRF-AT4521-TR
HRF-AT4521-E
On Tape And Reel3
On Individual Engineering Evaluation Board
2500 Units per Reel
One Board Per Box
(Note 3) Call Honeywell for details
Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume
any liability arising out of the application or use of any product or circuit described herein; neither does it convey any
license under its patent rights nor the rights of others.
12001 State Highway 55
2004 4521W Published August 2004 Page 8 Plymouth, Minnesota 55441-4799
1-800-323-8295
