Parameter
Min Typ
Max Units
Conditions
Operating Frequency
800
1200
MHz
DC Current
14
20
mA
At +12 VDC Supply
Control Type
TTL
1 Line
Logic "0" = Attenuation
Logic "1" = Thru
Control Current
High
0
A
VIH = +2.7 V
Low
0
A
VIL = +0.5 V
Insertion Loss
0.9
1.2
dB
Attenuation
LSB
50
dB
Range
0
50
dB
Accuracy
dB
(0.25 dB +2% of Atten.
Setting in dB)
Phase Change Vs. Attenuation
2
5
DEG
VSWR
1.15/1 1.25/1
Impedance
50
OHMS
Switching Speed
0.3
1
Sec
50% TTL to 90% / 10% RF
Transition (Rise/Fall) Time
80
nSec
90% / 10% or 10% / 90% RF
Switching
(Video)
Transients
2.1
V
Peak Value
Intercept Points
2nd
+90
dBm
155 MHz / 750 MHz
3rd
+45
dBm
755 MHz / 750 MHz
RF Power
Operate
+30
+20
dBm
0.1 dB Compression
No Damage
+30
dBm
Operating Temperature
-55
+25
+125
C
TA
FREQUENCY (MHz)
T Y P I C A L P E R F O R M A N C E
a t 2 5
C
VSWR
I.L. (dB)
2.0
1.8
1.6
1.4
1.2
1.0
2.5
2.0
1.5
1.0
0.5
0
100
400
1000
3000
VSWR
I. LOSS
.500
PART IDENTIFICATION
PIN 1 IS BRAZED TO CASE
.300
.100 TYP
.14
.065
.500
.010
.002
TYP
.15 TYP
.xx = .02
.xxx = .010
MODEL NO.
D A 0 8 7 9
PIN Diode 1 Section Attenuator
F E AT U R E S
800 - 1200 MHz
50 dB Attenuator
0.9 dB Insertion Loss
Constant Phase
TTL Control
Small 8 Pin 0.5 Sq. Package
1 BIT
G U A R A N T E E D P E R F O R M A N C E
D A I C O
I n d u s t r i e s
Rev. A / Iss. 1
4
GND
RF
OUT/IN
5
8
+12V
RF
IN/OUT
CONT "1"
7
1
2
3
6
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