Datasheet

AD8123
Rev. A | Page 3 of 16
SPECIFICATIONS
T
A
= 25°C, V
S
= ±5 V, R
L
= 150 Ω, Belden Cable (BL-7987R), V
OFFSET
= 0 V, V
PEAK
, V
GAIN
, and V
POLE
are set to recommended settings shown in
Figure 17, unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
PEAKING PERFORMANCE (NO CABLE)
Peak Frequency V
PEAK
= 2 V, V
GAIN
= 0.6 V, V
POLE
= 1 V 100 MHz
V
PEAK
= 2 V, V
GAIN
= 0.6 V, V
POLE
= 2 V 105 MHz
Peak Gain V
PEAK
= 2 V, V
GAIN
= 0.6 V, V
POLE
= 1 V 45 dB
V
PEAK
= 2 V, V
GAIN
= 0.6 V, V
POLE
= 2 V 55 dB
DYNAMIC PERFORMANCE
10% to 90% Rise/Fall Time V
OUT
= 2 V step, 150 meters Cat-5 4.9 ns
V
OUT
= 2 V step, 300 meters Cat-5 8.0 ns
Settling Time to 2% V
OUT
= 2 V step, 150 meters Cat-5 36 ns
V
OUT
= 2 V step, 300 meters Cat-5 106 ns
–3 dB Large Signal Bandwidth V
OUT
= 1 V p-p, <10 meters Cat-5 120 MHz
V
OUT
= 2 V p-p, <10 meters Cat-5 110 MHz
V
OUT
= 2 V p-p, 150 meters Cat-5 78 MHz
V
OUT
= 2 V p-p, 300 meters Cat-5 43 MHz
Integrated Output Voltage Noise 150 meter setting, integrated to 160 MHz 2.5 mV rms
300 meter setting, integrated to 160 MHz 24 mV rms
INPUT DC PERFORMANCE
Input Voltage Range −IN and +IN ±3.0 V
Maximum Differential Voltage Swing 4 V p-p
Voltage Gain ΔV
O
/ΔV
I
, V
GAIN
set for 0 meters of cable 1 V/V
Common-Mode Rejection Ratio (CMRR) At dc, V
PEAK
= V
GAIN
= V
POLE
= 0 V −86 dB
At dc, V
PEAK
= V
GAIN
= V
POLE
= 2 V −67 dB
At 1 MHz, V
PEAK
= V
GAIN
= V
POLE
= 2 V −52 dB
Input Resistance Common mode 4.4 MΩ
Differential 3.7 MΩ
Input Capacitance Common mode 1.0 pF
Differential 0.5 pF
Input Bias Current 2.4 μA
V
OFFSET
Pin Current 28.9 μA
V
GAIN
Pin Current 0.5 μA
V
PEAK
Pin Current 0.4 μA
V
POLE
Pin Current 0.4 μA
ADJUSTMENT PINS
V
PEAK
Input Voltage Range Relative to GND 0 to 2 V
V
POLE
Input Voltage Range Relative to GND 0 to 2 V
V
GAIN
Input Voltage Range Relative to GND 0 to 2 V
V
OFFSET
to OUT Gain OUT/V
OFFSET
, range limited by output swing 1 V/V
Maximum Flat Gain V
GAIN
= 2 V 2 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing 150 Ω load −3.75 to +3.69 V
1 kΩ load −3.66 to +3.69 V
Output Offset Voltage Referred to output, V
PEAK
= V
GAIN
= V
POLE
= 0 V 24 mV
Referred to output, V
PEAK
= V
GAIN
= V
POLE
= 2 V 32 mV
Output Offset Voltage Drift Referred to output 33 μV/°C