AD641 AD [Analog Devices], AD641 Datasheet - Page 2

• Manufacturer Part Number: AD641
• Description: 250 MHz Demodulating Logarithmic Amplifier
• Manufacturer: AD [Analog Devices]

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