Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver
DC - 2 GHz
AT-107
V3.00
Features
q
q
CR-13
2
ORIENTATION MARK
11
0.350
(8.89)
q
q
q
q
Attenuation: 0.5-dB Steps to 31.5 dB
Temperature Stability: 鹵 0.18 dB from -55擄C to
+85擄C Typical
Low DC Power Consumption
Hermetic Surface Mount Package
Integral TTL Driver
50鈩?Nominal Impedance
0.050
(1.27)
24 Places
12
0.050 TYP
(1.27)
11 EQUAL SPACES
@ .050 (1.27) Tol.
Non-Cumulative
0.015
鹵.003
(0.38
鹵
0.08)
24 Places
0.650
(16.51)
Description
M/A-COM鈥檚 AT-107 is a GaAs FET 6-bit digital attenuator
with a 0.5-dB minimum step size and 31.5 dB total
attenuation. This attenuator and integral TTL driver is in a
hermetically sealed ceramic 24-lead surface mount package.
The AT-107 is ideally suited for use where accuracy, fast
switching, very low power consumption and low
intermodulation products are required. Typical applications
include dynamic range setting in precision receiver circuits
and other gain/leveling control circuits. Environmental
screening is available. Contact the factory for information.
0.008
鹵
.002
(0.20
鹵
0.05)
24
Pin 1
0.090 MAX
(2.29)
Bottom View
Pin 24
0.120
(3.05)
0.115
(2.92)
Pin 1
0.620
(15.75)
Bottom of case is AC ground.
Dimensions in ( ) are in mm.
Unless otherwise noted:
.xxx
0.010 (.xx 0.25)
Pin 12
Electrical Speci鏗乧ations,
T
A
= -55擄C to +85擄C
Parameter
Reference Insertion Loss
3,4
0.015
(0.38)
0.050 (1.27)
22 Places
Test Conditions
DC - 0.5 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
DC - 1.0 GHz
DC - 2.0 GHz
Units
dB
dB
dB
Min.
Typ.
Max.
3.2
3.6
4.0
Attenuation Accuracy
Any Single Bit
Any Combination of Bits
鹵 (0.15 + 3% of attenuation setting in dB) dB
鹵 (0.2 + 3% of attenuation setting in dB) dB
鹵 (0.2 + 3% of attenuation setting in dB) dB
or 鹵 0.4 dB, whichever is greater
鹵 (0.2 + 3% of attenuation setting in dB) dB
or 鹵 0.4 dB, whichever is greater
1.8:1
nS
nS
mV
dBm
dBm
dBm
dBm
dBm
dBm
V
V
mA
mA
V
V
碌A(chǔ)
碌A(chǔ)
0.0
2.0
9
45
40
+21
+29
+35
+48
+75
+79
5.0
VSWR
Trise, Tfall
Ton, Toff
Transients
5
1 dB Compression
Input IP
3
Input IP
2
V
CC
V
EE
I
CC
I
EE
Vctl
Vctll
Input Leakage Current (Low)
Input Leakage Current (High)
1.
2.
3.
4.
5.
5
5
DC - 2.0 GHz
10% to 90%
50% Control to 90/10% RF
In-band (peak-peak)
Input Power
0.05 GHz
Input Power
0.5 - 2.0 GHz
For two-tone input power
0.05 GHz
up to +5 dBm
0.5 - 2.0 GHz
For two-tone input power
0.05 GHz
up to +5 dBm
0.5 - 2.0 GHz
4.5
-8.0
V
CC
= 4.5 to 5.5 V
Vctl = 0 to 0.8 V, or V
CC
- 2.1 V to V
CC
V
EE
= -5.0 to -8.0 V
Logic 0 (TTL)
Logic 1 (TTL)
0 to 0.8 V
2.0 to 5.0 V
5.5
-5.0
6.0
1.0
0.8
5.0
1.0
1.0
All speci鏗乧ations apply when operated with bias voltages of +5 V for V and -5.0 V to -8.0 V for V
EE
, and 50鈩?impedance at all ports unless otherwise speci鏗乪d.
CC
Above reference insertion loss.
This attenuator is guaranteed monotonic.
For the attenuator to meet the guaranteed speci鏗乧ations, it is necessary to have a DC return on either RF1 or RF2. The DC return can be either a 10 K resistor, or an RF choke.
鈩?/div>
V
EE
= -5 V for the typical numbers given.
Speci鏗乧ations Subject to Change Without Notice.
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
Fax (800) 618-8883
s
1
Asia/Paci鏗乧: Tel. +81 (03) 3226-1671
Fax +81 (03) 3226-1451
s
Europe: Tel. +44 (1344) 869 595
Fax +44 (1344) 300 020
1
2
