AT90-1107.pdf 데이터시트 (총 7 페이지) - 파일 다운로드 AT90-1107 데이타시트 다운로드

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Digital Attenuator, 31.5 dB, 6-Bit,
TTL Driver, DC-4.0 GHz
V 7.00
Features
n Attenuation: 0.5 dB Steps to 31.5 dB
n Single Positive Supply
n Contains internal DC to DC converter
n Low DC Power Consumption
n Small Footprint, JEDEC Package
n Integral TTL Driver
n 50 ohm Impedance
Description
M/A-COM's AT90-1107 is a GaAs FET 6-bit digital
attenuator with integral TTL driver. Step size is 0.5 dB pro-
viding a 31.5 dB total attenuation range. This device is in an
FQFP-N plastic surface mount package. The AT90-1107 is
ideally suited for use where accuracy, fast speed, very low
power consumption and low costs are required.
CSP-1
Electrical Specifications TA = +25°C
Parameter
Test Conditions
Frequency Units Min Typica
Max
Insertion Loss
DC - 4.0 GHz dB — 4.5
5.1
Attenuation
Accuracy
Individual Bits 0.5-1-2-4-8-16 dB
Any Combination of Bits
1 to 31.5 dB
DC - 4.0 GHz
DC - 4.0 GHz
dB
dB
— ±(.3 +7% of atten setting)
— ±(.5 +8% of atten setting)
VSWR
Switching Speed
1 dB Compression
Input IP3
Full Range
50% Cntl to 90%/10% RF
10% to 90% or 90% to 10%
Two-tone inputs up to +5 dBm
+Vcc
Logic “0”
Logic “1”
Icc
Sink Current is 20 µA max.
Source Current is 20 µA max.
Vcc min to max, Logic “0” or “1”
DC - 4.0 GHz Ratio
50 MHz
0.5 - 4.0 GHz
nS
nS
dBm
dBm
50 MHz
0.5-4.0 GHz
dB
dB
—V
—V
—V
— mA
4.75
0.0
2.0
2.0:1
75
20
+21
+29
+35
+48
5.0
6
2.2:1
150
50
5.25
0.8
5.0
10

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Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 4.0 GHz
AT90-1107
V 7.00
Pin Configuration
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Function
C8
C4
C2
C1
C0.5
C16
GND
NC
NC
NC1
GND
RF1
GND
NC
NC
NC
Pin #
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Function
NC
NC
+Vcc2
NC
Cp4
NC
Cp4
NC
-Vee3
GND
RF2
GND
NC1
-Vee3,5
NC
+Vcc2,6
Recommended PCB Layout 7
1. Pins 10 & 29 must be isolated
2. Pin 19 must be connected to Pin 32
3. Pin 25 must be connected to Pin 30
4. .01µF cap must be connected between Pins 21 and 23
5. -Vee is produced internally and requires a .1µF cap to
GND
6. +Vcc requires a .1µF cap to GND
Truth Table
C16 C8 C4 C2 C1 C0.5
0 0 0000
0 0 0001
0 0 0010
0 0 0100
0 0 1000
0 1 0000
1 0 0000
1 1 1111
0 = TTL Low; 1 = TTL High
Attenuation
Loss, Reference
0.5 dB
1.0 dB
2.0 dB
4.0 dB
8.0 dB
16.0 dB
31.5 dB
7. Application Note C2083 is available on line at
www.macom.com
Absolute Maximum Ratings 8
Parameter
Max. Input Power
0.05 GHz
0.5 - 4.0 GHz
+Vcc
Logic Voltages 9
Operating Temperature
Storage Temperature
Absolute Maximum
+27 dBm
+34 dBm
+5.5V
-0.5 to +Vcc + 0.5V
-40°C to +85°C
-65°C to +125°C
8. Operation of this device above any one of these
parameters may cause permanent damange.
9. Standard CMOS TTL interface, latch-up will occur if logic
signal is applied prior to power supply.
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
2

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Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 4.0 GHz
Typical Performance Curves
AT90-1107
V 7.00
Insertion Loss
6.0
5.0
4.0
3.0
2.0
0
1000
2000
3000
Frequency (MHz)
4000
VSWR @ Insertion Loss
Input
Output
2.2
1.9
1.6
1.3
1.0
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, 0.5 dB Bit
0.4
0.2
0.0
-0.2
-0.4
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, 2 dB Bit
0.4
0.2
0.0
-0.2
-0.4
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, 1 dB Bit
0.4
0.2
0.0
-0.2
-0.4
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, 4 dB Bit
0.4
0.2
0.0
-0.2
-0.4
0
1000
2000
3000
Frequency (MHz)
4000
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
3

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Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 4.0 GHz
Typical Performance Curves
AT90-1107
V 7.00
Attenuation Error, 8 dB Bit
0.8
0.4
0.0
-0.4
-0.8
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, 16 dB Bit
0.8
0.4
0.0
-0.4
-0.8
0
1000
2000
3000
Frequency (MHz)
4000
Attenuation Error, Max. Attenuation
1.0
0.0
-1.0
-2.0
0
1000
2000
3000
Frequency (MHz)
4000
VSWR, 1 dB Bit
Input
1.8
Output
1.6
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
VSWR, 0.5 dB Bit
Input
Output
1.8
1.6
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
VSWR, 2 dB Bit
Input
1.8
Output
1.6
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
4

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Digital Attenuator, 31.5 dB, 6-Bit, TTL Driver, DC - 4.0 GHz
Typical Performance Curves
AT90-1107
V 7.00
VSWR, 4 dB Bit
Input
1.6
Output
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
VSWR, 16 dB Bit
Input
1.8
Output
1.6
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
Typical Attenuation Deviation vs.
Temperature for 0.5 dB Bit
0.25
0.20
0.15
0.10
0.05
0.00
-0.05
-0.10
-0.15
-0.20
-0.25
0
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Specifications subject to change without notice.
n North America: Tel. (800) 366-2266
n Asia/Pacific: Tel.+81-44-844-8296, Fax +81-44-844-8298
n Europe: Tel. +44 (1344) 869 595, Fax+44 (1344) 300 020
Visit www.macom.com for additional data sheets and product information.
VSWR, 8 dB Bit
Input
1.8
Output
1.6
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
VSWR, Max. Attenuation
Input
1.6
Output
1.4
1.2
1.0
0
1000
2000
3000
Frequency (MHz)
4000
Typical Attenuation Deviation vs.
Temperature for 1 dB Bit
0.40
0.30
0.20
0.10
0.00
-0.10
-0.20
-0.30
0
500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
5