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AD8307-EB 数据表(PDF) 2 Page - Analog Devices

部件名 AD8307-EB
功能描述  Low Cost DC-500 MHz, 92 dB Logarithmic Amplifier
Download  20 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD8307-EB 数据表(HTML) 2 Page - Analog Devices

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–2–
REV. A
AD8307–SPECIFICATIONS (V
S = +5 V, TA = 25 C, RL
≥ 1M , unless otherwise noted)
Parameter
Conditions
Min
Typ
Max
Units
GENERAL CHARACTERISTICS
Input Range (
±1 dB Error)
Expressed in dBm re 50
–72
16
dBm
Logarithmic Conformance
f
≤ 100 MHz, Central 80 dB
±0.3
±1dB
f = 500 MHz, Central 75 dB
±0.5
dB
Logarithmic Slope
Unadjusted
1
23
25
27
mV/dB
vs. Temperature
23
27
mV/dB
Logarithmic Intercept
Sine Amplitude; Unadjusted
2
20
µV
Equivalent Sine Power in 50
–87
–84
–77
dBm
vs. Temperature
–88
–76
dBm
Input Noise Spectral Density
Inputs Shorted
1.5
nV/
√Hz
Operating Noise Floor
RSOURCE = 50 Ω/2
–78
dBm
Output Resistance
Pin 4 to Ground
10
12.5
15
k
Internal Load Capacitance
3.5
pF
Response Time
Small Signal, 10%-90%,
400
ns
0 mV–100 mV, CL = 2 pF
Large Signal, 10%-90%,
500
ns
0 V–2.4 V, CL = 2 pF
Upper Usable Frequency
3
500
MHz
Lower Usable Frequency
Input AC-Coupled
10
Hz
AMPLIFIER CELL CHARACTERISTICS
Cell Bandwidth
–3 dB
900
MHz
Cell Gain
14.3
dB
INPUT CHARACTERISTICS
DC Common-Mode Voltage
Inputs AC-Coupled
3.2
V
Common-Mode Range
Either Input (Small Signal)
–0.3
1.6
VS – 1
V
DC Input Offset Voltage
4
RSOURCE ≤ 50 Ω
50
500
µV
Drift
0.8
µV/°C
Incremental Input Resistance
Differential
1.1
k
Input Capacitance
Either Pin to Ground
1.4
pF
Bias Current
Either Input
10
25
µA
POWER INTERFACES
Supply Voltage
2.7
5.5
V
Supply Current
VENB ≥ 2 V
8
10
mA
Disabled
VENB ≤ 1 V
150
750
µA
NOTES
1This may be adjusted downward by adding a shunt resistor from the Output to Ground. A 50 k
Ω resistor will reduce the nominal slope to 20 mV/dB.
2This may be adjusted in either direction by a voltage applied to Pin 5, with a scale factor of 8 dB/V.
3See Application on 900 MHz operation.
4Normally nulled automatically by internal offset correction loop. May be manually nulled by a voltage applied between Pin 3 and Ground; see APPLICATIONS.
Specifications subject to change without notice.


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