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AT90-1233

Tyco Electronics
Part Number AT90-1233
Manufacturer Tyco Electronics
Description Digital Attenuator/ 30 dB/ 4-Bit/ TTL Driver/ DC - 2.5 GHz
Published Mar 23, 2005
Detailed Description Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.5 GHz V 1.00 AT90-1233 Features n n n n n n n n CSP-1 Attenuat...
Datasheet PDF File AT90-1233 PDF File

AT90-1233
AT90-1233

Overview
Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.
5 GHz V 1.
00 AT90-1233 Features n n n n n n n n CSP-1 Attenuation: 2 dB Steps to 30 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 AT90-1233 is a GaAs FET 4-Bit digital attenuator with integral driver.
Step size is 2 dB providing a 30 dB attenuation range.
This device is in an FQFP-N plastic surface mount package.
The AT90-1233 is suited for single supply applications where accuracy, fast speed, low power consumption and low costs are required.
Electrical Specifications TA = +25°C 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 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 µA max.
Source Current is 20 µA max.
Vcc min to max, Logic “0” or “1” Frequency DC - 2.
5 GHz DC - 2.
5 GHz DC - 2.
5 GHz — — 50 MHz 0.
5 - 2.
5 GHz 50 MHz 0.
5 - 2.
5 GHz — — — — Units dB dB Ratio nS nS dBm dBm dB dB V V V mA Min — — — — — — — — — 4.
75 0.
0 2.
0 — Typical 2.
7 — 1.
5:1 75 20 +21 +29 +35 +48 5.
0 — — 6 Max 3.
0 ±(.
3 +5% of atten setting) 1.
8:1 150 50 — — — — 5.
25 0.
8 5.
0 10 Digital Attenuator, 30 dB, 4-Bit, TTL Driver, DC - 2.
5 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.
6.
Function GND C16 C8 C4 C2 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 +VCC2 N/C Cp4 N/C Cp4 N/C -VEE3 GND RF2 GND N/C1 -VEE3,5 N/C +VCC 2,6 AT90-1233 V 1.
00 Recommended PCB Layout 7 7.
Application Note C2083 is available on line at www.
macom.
com Pins 10 and 29 must be isolated.
Pin 19 must be connected to Pin 32.
Pin 25 must connect to Pin 30.
A .
01 µF cap must be connected between Pins 21 and ...


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