AD8309 Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Fabricante
AD8309 Datasheet PDF : 20 Pages
| |||
AD8309–SPECIFICATIONS (VS = +5 V, TA = +25؇C, unless otherwise noted)
Parameter
Conditions
Min1
Typ
Max1 Units
INPUT STAGE
Maximum Input2
Equivalent Power in 50 Ω
Noise Floor
Equivalent Power in 50 Ω
Input Resistance
Input Capacitance
DC Bias Voltage
(Inputs INHI, INLO)
Differential Drive, p-p
Terminated in 52.3 Ω
Terminated 50 Ω Source
500 MHz Bandwidth
From INHI to INLO
From INHI to INLO
Either Input
± 3.5
±4
V
+9
dBV
+22
dBm
1.28
nV/√Hz
–78
dBm
800
1000
1200 Ω
2.5
pF
1.725
V
LIMITING AMPLIFIER
Usable Frequency Range
At Limiter Output
Phase Variation at 100 MHz
Limiter Output Current
Input Range3
Maximum Output Voltage
Rise/Fall Time (10%–90%)
(Outputs LMHI, LMLO)
RLOAD = RLIM = 50 Ω to –10 dB Point
Over Input Range –60 dBm to +10 dBm
Nominally 400 mV/RLIM
Versus Temperature –40°C ≤ TA ≤ +85°C
Equivalent dBm
At Either LMHI or LMLO, wrt VPS2
RLOAD ≤ 50 Ω, 40 Ω ≤ RLIM ≤ 400 Ω
5
500 MHz
875
MHz
±3
Degrees
0
1
10
mA
–0.008
%/°C
–78
+9
dBV
–65
+22 dBm
1
1.25
V
0.4
ns
LOGARITHMIC AMPLIFIER
± 3 dB Error Dynamic Range
Transfer Slope
Intercept (Log Offset)
Linearity Error (Ripple)
Output Voltage
Minimum Load Resistance, RL
Maximum Sink Current
Output Resistance
Small-Signal Bandwidth
Output Settling Time to 1%
Rise/Fall Time (10%–90%)
(Output VLOG)
From Noise Floor to Maximum Input
5 MHz ≤ f ≤ 200 MHz
Over Temperature –40°C < TA < +85°C
5 MHz ≤ f ≤ 200 MHz
Equivalent dBm (re 50 Ω)
Over Temperature –40°C ≤ TA ≤ +85°C
Equivalent dBm (re 50 Ω)
Temperature Sensitivity
Input from –83 dBV (–70 dBm) to +7 dBV (+20 dBm)
Input = –91 dBV (–78 dBm) VS = +5 V, +2.7 V
Input = +9 dBV (+22 dBm) VS = +5 V
Input = +9 dBV (+22 dBm) VS = +2.75 V
To Ground
18
17
–116
–103
–117
–104
40
0.75
Large Scale Input, +3 dBV (+16 dBm),
RL ≥␣ 50 Ω, CL ≤␣ 100 pF
Large Scale Input, +3 dBV (+16 dBm),
RL ≥␣ 50 Ω, CL ≤␣ 100 pF
100
20
20
–108
–95
–108
–95
–0.009
± 0.4
0.34
2.34
2.10
50
1.0
0.3
3.5
120
67
22
23
–100
–87
–99
–86
2.75
1.25
220
100
dB
mV/dB
mV/dB
dBV
dBm
dBV
dBm
dB/°C
dB
V
V
V
Ω
mA
Ω
MHz
ns
ns
POWER INTERFACES
Supply Voltage, VPOS
Quiescent Current
Over Temperature
Disable Current
Additional Bias for Limiter
Logic Level to Enable Power
Input Current when HI
Logic Level to Disable Power
Zero-Signal, LMDR Open
–40°C < TA < +85°C
–40°C < TA < +85°C
RLIM = 400 Ω (See Text)
HI Condition, –40°C < TA < +85°C
3 V at ENBL, –40°C < TA < +85°C
LO Condition, –40°C < TA < +85°C
2.7
5
6.5 V
13
16
20
mA
11
16
23
mA
0.01
4
µA
1.4
1.6 mA
1.8
40
VPOS V
60
µA
–0.5
1
V
NOTES
1Minimum and maximum specified limits on parameters that are guaranteed but not tested are six sigma values.
2The input level is specified in “dBV” since logarithmic amplifiers respond strictly to voltage, not power. 0 dBV corresponds to a sinusoidal single-frequency input of
1 V rms. A power level of 0 dBm (1 mW) in a 50 Ω termination corresponds to an input of 0.2236 V rms. Hence, the relationship between dBV and dBm is a fixed
offset of +13 dBm in the special case of a 50 Ω termination.
3Due to the extremely high Gain Bandwidth Product of the AD8309, the output of either LMHI or LMLO will be unstable for levels below –78 dBV (–65 dBm, re 50 Ω).
Specifications subject to change without notice.
–2–
REV. B
Share Link: 