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Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz
V 1.00
AT90-1413
Features
n n n n n n n n
CSP-1
Attenuation: 1 dB Steps to 15 dB Single Positive Supply Contains Internal DC to DC Converter Small Footprint, JEDEC Package Integral TTL Driver 50 Ohm Impedance Test Boards Available Tape and Reel Packaging Available
Description
M/A-COM's AT90-1413 is a GaAs FET 4-Bit digital attenuator with integral driver. Step size is 1 dB providing a 15 dB attenuation range. This device is in an FQFP-N plastic surface mount package. The AT90-1413 is suited for single supply applications where accuracy, fast speed, low power consumption and low costs are required.
Electrical Specifications: TA = 25C
Parameter Insertion Loss Attenuation Accuracy VSWR Switching Speed 1 dB Compression Input IP3 +Vcc Logic "0" Logic "1" Icc Test Conditions -- Individual Bits or Combination of Bits Full Attenuation Range 50% Cntl to 90%/10% RF 10% to 90% or 90% to 10% -- Two-tone Inputs up to +5 dBm -- Sink Current is 20 A max. Sink Current is 20 A max. Vcc min to max, Logic "0" or "1" Frequency DC-2.5 GHz DC-4.0 GHz DC-2.5 GHz DC-4.0 GHz DC-2.5 GHz DC-4.0 GHz -- -- 50 MHz 0.5-4.0 GHz 50 MHz 0.5-4.0 GHz -- -- -- -- Units dB dB dB dB Ratio Ratio nS nS dB dB dB dB V V V mA Min. -- -- -- -- -- -- -- -- -- -- -- -- 4.75 0.0 2.0 -- Typ. 2.0 2.5 -- -- 1.5:1 1.8:1 75 20 +21 +29 +35 +48 5.0 -- -- 6 Max. 2.5 3.0 (0.3+4% of atten setting) (0.3+6% of atten setting) 1.8:1 2.0:1 150 50 -- -- -- -- 5.25 0.8 5.0 10
Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz Pin Configuration
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1. 2. 3. 4. 5. Function GND C8 C4 C2 C1 GND GND N/C N/C N/C1 GND RF1 GND N/C N/C N/C Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Function N/C N/C +Vcc 2 N/C Cp 4 N/C Cp 4 N/C -Vee 3 GND RF2 GND N/C1 -Vee 3,5 N/C +Vcc 2,6
AT90-1413
V 1.00
Recommended PCB Layout 7
7. Application Note C2083 is available on line at www.macom.com
Pins 10 & 29 must be isolated. Pin 19 must be connected to Pin 32. Pin 25 must connect to Pin 30. A .01 F cap must be connected between Pins 21 and 23. -Vee is produced internally and requires a .1 F cap to GND 6. +Vcc requires a .1 F cap to GND.
Absolute Maximum Ratings 8
Parameter Absolute Maximum +27 dBm +34 dBm +5.5V
9
Truth Table
C8 0 0 0 0 1 1 C4 0 0 0 1 0 1 C2 0 0 1 0 0 1 C1 0 1 0 0 0 1 Attenuation Loss, Reference 1.0 dB 2.0 dB 4.0 dB 8.0 dB 15.0 dB
Max. Input Power 0.05 GHz 0.5 - 4.0 GHz +Vcc Logic Voltages
-0.5 to +Vcc + 0.5V -40C to +85C -65C to +125C
Operating Temperature Storage Temperature
0 = TTL Low; 1 = TTL High
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.
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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.
Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz
AT90-1413
V 1.00
Typical Performance Curves
Insertion Loss
3.00
1.60
VSWR @ Insertion Loss
RF In RF Out
Attenuation (dB)
2.50
1.40
2.00
VSWR
1.20 1.00
1.50
1.00 0 500 1000 1500 2000 2500 3000 3500 4000
0
500
1000
1500
2000
2500
3000
3500
4000
Frequency (MHz)
Frequency (MHz)
Attenuation Error, 1 dB Bit
0.30 0.20 0.10 0.00 -0.10 -0.20 -0.30 0 500 1000 1500 2000 2500 3000 3500 4000
Attenuation Error, 2 dB Bit
0.30 0.20
Attenuation (dB)
Attenuation (dB)
0.10 0.00 -0.10 -0.20 -0.30 0 500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Frequency (MHz)
Attenuation Error, 4 dB Bit
0.60
Attenuation Error, 8 dB Bit
0.20
0.20
Attenuation (dB)
Attenuation (dB)
0.40
0.00
-0.20
0.00
-0.40
-0.20 0 500 1000 1500 2000 2500 3000 3500 4000
-0.60 0 500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Frequency (MHz)
3
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.
Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz Typical Performance Curves
Attenuation Error, Max. Attenuation
0.40
1.60
AT90-1413
V 1.00
VSWR, 1 dB Bit
RF In RF Out
Attenuation (dB)
0.20
1.40
0.00
VSWR
1.20
-0.20
-0.40 0 500 1000 1500 2000 2500 3000 3500 4000
1.00 0 500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Frequency (MHz)
VSWR, 2 dB Bit
RF In
1.60
VSWR, 4 dB Bit
RF Out
1.60 RF In RF Out
1.40
1.40
VSWR
VSWR
1.20 1.20 1.00 0 500 1000 1500 2000 2500 3000 3500 4000 1.00 0 500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
Frequency (MHz)
VSWR, 8 dB Bit
RF In 1.60 RF Out
VSWR, Max. Attenuation
RF In 1.60 RF Out
1.40
1.40
VSWR
VSWR
1.20
1.20
1.00 0 500 1000 1500 2000 2500 3000 3500 4000
1.00 0 500 1000 1500 2000 2500 3000 3500 4000
Frequency (MHz)
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.
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Digital Attenuator, 15 dB, 4-Bit, TTL Driver, DC - 4.0 GHz
AT90-1413
V 1.00
Ordering Information
Part Number AT90-1413 AT90-1413TR AT90-1413-TB Package Bulk Packaging Tape and Reel (1K Reel) Units Mounted on Test Board
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.
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