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參數(shù)資料
| 型號： | ADL5519-EVALZ |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 1 MHz to 10 GHz, 50 dB Dual Log Detector/Controller |
| 中文描述： | 1兆赫至10 GHz，50分貝雙數(shù)檢波器/控制器 |
| 文件頁數(shù)： | 14/27頁 |
| 文件大小： | 479K |
| 代理商： | ADL5519-EVALZ |
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ADL5519
Preliminary Technical Data
USING THE ADL5519
BASIC CONNECTIONS
The ADL5519 is specified for operation up to 10 GHz; as a
result, low impedance supply pins with adequate isolation
between functions are essential. A power supply voltage of
between 3.0 V and 5.5 V should be applied to VPSA, VPSB,
and VPSR. Power supply decoupling capacitors of 100 pF
and 0.1 μF should be connected close to these power
supply pins.
Rev. PrB | Page 14 of 27
ADL5519ACPZ
EXPOSED PADDLE
CLPA
TEMP
VPSR
ADJA
CLPB
7
VLVL
6
VREF
5
ADJB
4
VPSB
3
VSTA
VSTB
8
OUTB
FBKB
OUTN
OUTP
FBKA
OUTA
VPSA
27
28
29
30
31
32
INHB
INLB
COMR
PWDN
INLA
INHA
25
26
1
2
COMR COMR
COMR
COMR
14
13
12
11
10
9
16
15
NC
NC
22
21
20
19
18
17
24
23
COMR
COMR
INHA
C4
47nF
C3
47nF
VPSB
C11
100pF
C16
0.1
μ
F
R11
0
Ω
R10
0
Ω
R9
DIFF OUT +
DIFF OUT –
R4
0
Ω
C8
100pF
C15
0.1
μ
F
VPSA
C7
100pF
C12
0.1
μ
F
R3
0
Ω
VPSR
SEE
TEXT
R5
52.3
Ω
INHB
C2
C1
47nF
R6
52.3
Ω
47nF
R7
R12
0
Ω
SETPOINT
VOLTAGE B
OUTPUT
VOLTAGE B
R20
0
Ω
R2
1k
Ω
R1
1k
Ω
R8
0
Ω
SETPOINT
VOLTAGE B
OUTPUT
VOLTAGE B
R21
0
Ω
0
Ω
SEE
TEXT
SEE
TEXT
SEE
TEXT
0
Ω
SEE
TEXT
Figure 11. Basic Connections
The paddle of the LFCSP_VD package is internally
connected to COMR.
For optimum thermal and electrical
performance, the paddle should be soldered to a low
impedance ground plane.
INPUT SIGNAL COUPLING
The RF inputs (INHA and INHB) are single-ended and
must be ac-coupled. INLA and INLB (input common)
should be ac-coupled to ground. Suggested coupling
capacitors are 47 nF ceramic 0402-style capacitors for input
frequencies of 1 MHz to 10 GHz. The coupling capacitors
should be mounted close to the INHA[INHB] and
INLA[INLB} pins. The coupling capacitor values can be
increased to lower the input stage’s high-pass cutoff
frequency. The high-pass corner is set by the input coupling
capacitors and the internal 10 pF high-pass capacitor. The
dc voltage on INHA[INHB] and INLA[INLB] is about one
diode voltage drop below the supply voltage.
VPSA
2k
Ω
A = 9dB
18.7k
Ω
18.7k
Ω
CURRENT
Gm
STAGE
INLA
INHA
OFFSET
5pF
5pF
GAIN
STAGE
Figure 12. Single Channel Input Interface
While the input can be reactively matched, in general this is not
necessary. An external 52.3
Ω
shunt resistor (connected on the
signal side of the input coupling capacitors, as shown in
Figure 11) combines with the relatively high input impedance
to give an adequate broadband 50
Ω
match.
The coupling time constant, 50 × C
C
/2, forms a high-pass
corner with a 3 dB attenuation at f
HP
= 1/(2π × 50 × C
C
), where
C1 = C2 = C
C
. Using the typical value of 47 nF, this high pass
corner will be ~68 kHz. In high frequency applications, f
HP
should be as large as possible to minimize the coupling of
unwanted low frequency signals. In low frequency applications,
a simple RC network forming a low-pass filter should be added
at the input for similar reasons. This should generally be placed
at the generator side of the coupling capacitors, thereby
lowering the required capacitance value for a given high-pass
corner frequency.
TEMPERATURE SENSOR INTERFACE
The ADL5519 provides a temperature sensor output capable of
driving about 1.6 mA. The temperature scaling factor of the
output voltage is approximately 2 mV/°C. The typical absolute
voltage at 25°C is ~620 mV.
TEMP
VPSR
INTERNAL
VPTAT
12k
Ω
4k
Ω
COMR
Figure 13. TEMP Interface Simplified Schematic
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