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Maxim Integrated
MAX19792
500MHz to 4000MHz Dual Analog Voltage Variable
Attenuator with On-Chip 10-Bit SPI-Controlled DAC
5V AC ELECTRICAL CHARACTERISTICS (continued)
(Typical Application Circuit, one attenuator, V
CC
 = 4.75V to 5.25V, RF ports are driven from 50I sources and loaded into 50I,
input P
RF
 = 0dBm, f
RF
 = 950MHz to 2150MHz, V
CTRL
 = 1V to 4V, V
DAC_LOGIC
 = 0V, RDBK_EN(D9, REG3) = logic 0, T
C
 = -40NC to
+100NC. Typical values are for T
C
 = +25NC, V
CC
 = 5V, input P
RF
 = 0dBm, f
RF
 = 1500MHz, V
CTRL
 = 1V, V
DAC_LOGIC
 = 0V, RDBK_EN
(D9, REG3) = logic 0, unless otherwise noted.) (Notes 5, 7)
Note 5:    Production tested at T
C
 = +100NC. All other temperatures are guaranteed by design and characterization.
Note 6:    Recommended functional range. Not production tested. Operation outside this range is possible, but with degraded
performance of some parameters.
Note 7:    All limits include external component losses, connectors and PCB traces. Output measurements taken at the RF port of
the Typical Application Circuit.
Note 8:    f
RF1
 = 1501MHz, f
RF2
 = 1500MHz, P
RF
 = 0dBm/tone applied to attenuator input.
Note 9:    Switching time measured from 50% of the CTRL signal to when the RF output settles to Q1dB (R3 = 0I).
Note 10: Switching time measured from when CS is asserted to when the RF output settles to Q1dB.
Note 11: Switching time measured from when MODE is asserted to when the RF output settles to Q1dB.
Note 12: Typical minimum time for proper SPI operation.
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
CTRL Switching Time (Note 9)
15dB to 0dB range
360
ns
0dB to 15dB range
780
CS Switching Time (Note 10)
15dB to 0dB range
700
ns
0dB to 15dB range
2200
MODE Switching Time (Note
11)
15dB to 0dB range (MODE 1 to 0)
700
ns
0dB to 15dB range (MODE 0 to 1)
2200
Input Return Loss
21
dB
Output Return Loss
31
dB
Group Delay
Input/output 50I lines deembedded
190
ps
Group Delay Flatness Over Any
125MHz Band
Peak to peak
25
ps
Group Delay Change
V
CTRL
 = 1V to 4V
-85
ps
Insertion Phase Change vs.
Attenuation Control
V
CTRL
 = 1V to 4V
17.8
Degrees
S21 Attenuation Deviation from
a Straight Line
V
CTRL
 = 1.4V to 3.1V
?.4
dB
SERIAL PERIPHERAL INTERFACE (SPI)
Maximum Clock Speed
20
MHz
Data-to-Clock Setup Time
t
CS
(Note 12)
2
ns
Data-to-Clock Hold Time
t
CH
(Note 12)
2.5
ns
CS-to-CLK Setup Time
t
EWS
(Note 12)
3
ns
CS Positive Pulse Width
t
EW
(Note 12)
7
ns
Clock Pulse Width
t
CW
(Note 12)
5
ns
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MAX19793ETX+ 功能描述:衰减器 -IC 2000MHz to 5000MHz Attenuator RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C
MAX19793ETX+T 功能描述:衰减器 -IC 2000MHz to 5000MHz Attenuator RoHS:否 制造商:Skyworks Solutions, Inc. 最大衰减:18 dB 容差: 阻抗: 功率额定值:30 dBm 安装风格:SMD/SMT 工作温度范围:- 40 C to + 85 C
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