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AD641S 데이터시트(PDF) 2 Page - Analog Devices

부품명 AD641S
상세설명  250 MHz Demodulating Logarithmic Amplifier
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REV. C
–2–
AD641–SPECIFICATIONS
ELECTRICAL CHARACTERISTICS
AD641A
AD641S
Parameter
Conditions
Min
Typ
Max
Min
Typ
Max
Units
TRANSFER FUNCTION1
(IOUT = IY LOG |VIN/VX|for VIN = 0.75 mV to ±200 mV dc)
LOG AMPLIFIER PERFORMANCE
3 dB Bandwidth
250
250
MHz
Voltage Compliance Range
–0.3
+VS – 1
–0.3
+VS – 1
V
Slope Current, IY
0.98
1.00
1.02
0.98
1.00
1.02
mA
Accuracy vs. Temperature
0.002
0.002
%/
°C
Over Temperature
TMIN to TMAX
0.98
1.02
mA
Intercept dBm
250 MHz
–40.84 –40.43 –39.96
–40.84 –40.43
–39.96
dBm
Over Temperature
TMIN to TMAX, 250 MHz
–40.59
–39.47
dBm
Zero Signal Output Current2
–0.2
–0.2
mA
ITC Disabled
Pin 8 to COM
–0.27
–0.27
mA
Maximum Output Current
2.3
2.3
mA
DYNAMIC RANGE
Single Configuration
44
44
dB
Over Temperature
TMIN to TMAX
40
38
dB
Dual Configuration
58
58
dB
Over Temperature
TMIN to TMAX
52
52
dB
LOG CONFORMANCE
f = 250 MHz
Single Configuration
–44 dBm to 0 dBm
±0.5
±2.0
±0.5
±2.0
dB
Over Temperature
–42 dBm to –4 dBm; TMIN to TMAX
±1.0
±2.5
dB
–42 dBm to –2 dBm, TMIN to TMAX
±1.0
±2.5
Dual Configuration
S: –60 dBm to –2 dBm;
±0.5
±2.0
±0.5
±2.0
dB
Over Temperature
A: –56 dBm to –4 dBm, TMIN to TMAX
±1.0
±2.5
±1.0
±2.5
dB
LIMITER CHARACTERISTICS
Flatness
–44 dBm to 0 dBm @ 10.7 MHz
±1.6
±1.6
dB
Phase Variation
–44 dBm to 0 dBm @ 10.7 MHz
±2.0
±2.0
Degrees
INPUT CHARACTERISTICS
Input Resistance
Differential
500
500
k
Input Offset Voltage
Differential
50
200
50
200
µV
vs. Temperature
0.8
0.8
µV/°C
Over Temperature
TMIN to TMAX
300
µV
vs. Supply
22
µV/V
Input Bias Current
7
25
7
25
µA
Input Bias Offset
11
µA
Common Mode Input Range
–2
+0.3
–2
+0.3
V
SIGNAL INPUT (Pins 1, 20)
Input Capacitance
Either Pin to COM
2
2
pF
Noise Spectral Density
1 kHz to 10 MHz
2
2
nV/
√Hz
Tangential Sensitivity
BW = 100 MHz
–72
–72
dBm
INPUT ATTENUATOR
(Pins 2, 3, 4, 5 & 19)
Attenuation
3
Pins 5 to Pin 19
20
20
dB
Input Resistance
Pins 5 to 3/4
300
300
APPLICATION RESISTORS
(Pins 15, 16, 17)
0.995
1.000
1.005
0.995
1.000
1.005
k
OUTPUT CHARACTERISTICS
(Pins 10, 11)
Peak Differential Output
4
±180
±180
mV
Output Resistance
Either Pin to COM
75
75
Quiescent Output Voltage
Either Pin to COM
–90
–90
mV
POWER SUPPLY
Voltage Supply Range
±4.5
±7.5
±4.5
±7.5
V
Quiescent Current
+VS (Pin 12)
TMIN to TMAX
915
9
15
mA
–VS (Pin 7)
TMIN to TMAX
35
60
35
60
mA
NOTES
1Logarithms to base 10 are used throughout. The response is independent of the sign of V
IN.
2The zero-signal current is a function of temperature unless internal temperature compensation (ITC) pin is grounded.
3Attenuation ratio trimmed to calibrate intercept to 10 mV when in use. It has a temperature coefficient of +0.3%/
°C.
4The fully limited signal output will appear to be a square wave; its amplitude is proportional to absolute temperature.
Specifications subject to change wi
thout notice.
(VS =
5 V; TA = +25 C, unless otherwise noted)


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