Data Sheet AD8307
Rev. E | Page 3 of 24
SPECIFICATIONS
V
S
= 5 V, T
A
= 25°C, R
L
≥ 1 M, unless otherwise noted.
Table 2.
Parameter Conditions Min Typ Max Unit
GENERAL CHARACTERISTICS
Input Range (±3 dB Error) From noise floor to maximum input 92 dB
Input Range (±1 dB Error) From noise floor to maximum input 88 dB
Logarithmic Conformance f ≤ 100 MHz, central 80 dB ±0.3 ±1 dB
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 Ω −87 −84 −77 dBm
vs. Temperature −88 −76 dBm
Input Noise Spectral Density Inputs shorted 1.5 nV/√Hz
Operating Noise Floor R
SOURCE
= 50 Ω/2 −78 dBm
Output Resistance Pin 4 to ground 10 12.5 15 kΩ
Internal Load Capacitance 3.5 pF
Response Time Small signal, 10% to 90%, 0 mV to 100 mV, C
L
= 2 pF 400 ns
Large signal, 10% to 90%, 0 V to 2.4 V, C
L
= 2 pF 500 ns
Upper Usable Frequency 500 MHz
Lower Usable Frequency AC-coupled input 10 Hz
AMPLIFIER CELL CHARACTERISTICS
Cell Bandwidth −3 dB 900 MHz
Cell Gain 14.3 dB
INPUT CHARACTERISTICS
DC Common-Mode Voltage AC-coupled input 3.2 V
Common-Mode Range Either input (small signal) −0.3 +1.6 V
S
− 1 V
DC Input Offset Voltage
3
R
SOURCE
≤ 50 Ω 50 500 μV
Drift 0.8 μV/°C
Incremental Input Resistance Differential 1.1 kΩ
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 V
ENB
≥ 2 V 8 10 mA
Disabled V
ENB
≤ 1 V 150 750 μA
1
This can be adjusted downward by adding a shunt resistor from the output to ground. A 50 kΩ resistor reduces the nominal slope to 20 mV/dB.
2
This can be adjusted in either direction by a voltage applied to Pin 5, with a scale factor of 8 dB/V.
3
Normally nulled automatically by internal offset correction loop and can be manually nulled by a voltage applied between Pin 3 and ground; see the Applications
Information section.
