Digital Attenuator
15 dB, 4-Bit, TTL Driver, DC-4.0 GHz
Rev. V5
MAAD-007077-000100
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M/A-COM Technology Solutions Inc. and its affiliates reserve the right to make
changes to the product(s) or information contained herein without notice.
2
ADVANCED: Data Sheets contain information regarding a product M/A-COM Technology Solutions
is considering for development. Performance is based on target specifications, simulated results,
and/or prototype measurements. Commitment to develop is not guaranteed.
PRELIMINARY: Data Sheets contain information regarding a product M/A-COM Technology
Solutions has under development. Performance is based on engineering tests. Specifications are
typical. Mechanical outline has been fixed. Engineering samples and/or test data may be available.
Commitment to produce in volume is not guaranteed.
Electrical Specifications: TA = 25°C, Z0 = 50 Ω
Parameter Frequency Units Min Typ Max
Insertion Loss DC-2.5 GHz
DC-4.0 GHz
dB
dB
—
—
2.0
2.5
2.5
3.0
Attenuation
Accuracy
DC-2.5 GHz
DC-4.0 GHz
dB
dB
—
—
—
—
±(0.3+4% of atten setting)
±(0.3+6% of atten setting)
VSWR DC-2.5 GHz
DC-4.0 GHz
Ratio
Ratio
—
—
1.5:1
1.8:1
1.8:1
2.0:1
Switching Speed —
—
ns
ns
—
—
25
4
—
—
1 dB Compression 50 MHz
0.5-4.0 GHz
dBm
dBm
—
—
+21
+27
—
—
Input IP3 50 MHz
0.5-4.0 GHz
dBm
dBm
—
—
+35
+48
—
—
Vcc — V 4.75 5.0 5.25
VIL
VIH
—
—
V
V
0.0
2.0
—
—
0.8
5.0
lin (Input Leakage Current) — uA -1.0 — 1.0
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
—
LOW-level input voltage
HIGH-level input voltage
Vin = VCC or GND
Icc4 Vcc min to max, Logic “0” or “1” — mA — 6 10
Turn-on Current5 For guaranteed start-up — mA — — 125
Switching Noise Generated from
DC-DC Converter with
recommended capacitors
3.5 MHz dBm — -93 —
Thermal Resistance θjc — — °C/W — 15 —
ΔIcc
(Additional Supply Current
Per TTL Input Pin)
VCC = Max, Vcntrl = VCC - 2.1 V — mA — — 1.5
4. During turn-on, the device requires an initial start up current (Icc)
specified as “Turn-on Current”. Once operational, Icc will drop to the
specified levels.
5. The DC-DC converter is guaranteed to start in 100 µs as long as the
power supplies have the maximum turn-on current available for start-
up.
Absolute Maximum Ratings 6,7
Parameter Absolute Maximu m
Max. Input Power
0.05 GHz
0.5 - 4.0 GHz
+27 dBm
+34 dBm
VCC -0.5V ≤ VCC ≤ +6.0V
Vin8 -0.5V ≤ Vin ≤ VCC + 0.5V
Operating Temperature -40ºC to +85ºC
Storage Temperature -65ºC to +125ºC
6. Exceeding any one or combination of these limits may cause
permanent damage to this device.
7. M/A-COM does not recommend sustained operation near
these survivability limits.
8. Standard CMOS TTL interface, latch-up will occur if logic sig-
nal is applied prior to power supply.
Recommended PCB Configuration9
9. Application Note S2083 is available on line at www.macom.com