Datasheet

Data Sheet AD8122
Rev. 0 | Page 3 of 20
SPECIFICATIONS
T
A
= 25°C, V
S
= ±5 V, Category 5e UTP cable, input V
CM
= 0 V, V
OFFSET
= 0 V, V
PEAK
, V
GAIN
, and V
FILTER
are set to the recommended settings
shown in Figure 24, unless otherwise noted. For G = 2, R
L
= 150 Ω and V
OUT
= 2 V p-p; for G = 1, R
L
= 1 kΩ and V
OUT
= 1 V p-p.
Table 1.
Parameter Test Conditions/Comments Min Typ Max Unit
DYNAMIC AND NOISE PERFORMANCE
−3 dB Large Signal Bandwidth AD8122 only, G = 1/G = 2 270/165 MHz
150 meters of cable, G = 1/G = 2 120/110 MHz
300 meters of cable, G = 1, G = 2 60 MHz
Slew Rate V
OUT
= 2 V p-p, AD8122 only, G = 1, G = 2 1000 V/µs
10% to 90% Rise/Fall Times V
OUT
= 2 V step, 150 meters of cable, G = 2 6 ns
V
OUT
= 2 V step, 300 meters of cable, G = 2 7 ns
V
OUT
= 1 V step, 150 meters of cable, G = 1 6 ns
V
OUT
= 1 V step, 300 meters of cable, G = 1 7 ns
Settling Time to 1% V
OUT
= 2 V step, 150 meters of cable, G = 2 70 ns
V
OUT
= 2 V step, 300 meters of cable, G = 2 70 ns
V
OUT
= 1 V step, 150 meters of cable, G = 1
85
ns
V
OUT
= 1 V step, 300 meters of cable, G = 1 70 ns
Integrated Output Voltage Noise 150 meters of cable, integrated to 160 MHz,
G = 1/G = 2
3.7/6.2 mV rms
300 meters of cable, integrated to 160 MHz,
G = 1/G = 2
17/27 mV rms
INPUT PERFORMANCE
Input Voltage Range Common mode, −IN
x
= +IN
x
±4.0 V
Maximum Differential Voltage Swing
|(+IN
x
) − (−IN
x
)|
3
V
Voltage Gain Error ΔV
OUT
/ΔV
IN
, V
GAIN
set for 0 meters of cable, G = 1 1.5 %
ΔV
OUT
/ΔV
IN
, V
GAIN
set for 0 meters of cable, G = 2 0.50 %
Channel-to-Channel Gain Matching G = 1, G = 2 0.15 %
Common-Mode Rejection (CMR) ΔV
OUT
/ΔV
IN, CM
DC, V
PEAK
= V
GAIN
= 0 V, G = 1/G = 2 −92/−87 dB
DC, 300 meters of cable, G = 1/G = 2 −89/−85 dB
1 MHz, 300 meters of cable, G = 1/G = 2 −63/−57 dB
50 MHz, 300 meters of cable, G = 1/G = 2 5/10 dB
100 MHz, 300 meters of cable, G = 1/G = 2 10/14 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 1.1 µA
ADJUSTMENT PINS
V
PEAK
Input Voltage Range Relative to ground 0 to 2 V
V
GAIN
Input Voltage Range Relative to ground 0 to 2 V
V
OFFSET
Input Current 1.1 µA
V
GAIN
Input Current −0.5 µA
V
PEAK
Input Current ±0.6 µA
V
FILTER
Input Current 0.5 µA
V
OFFSET
to OUT
x
Gain OUT
x
= OUT
R
, OUT
G
, OUT
B
, range limited by
output swing, V
GAIN
= 0 V, G = 1
1 V/V
OUTPUT CHARACTERISTICS
Output Voltage Swing G = 1, G = 2 −3.9 to +3.9 V
Output Offset Voltage RTO, V
PEAK
= V
GAIN
= V
FILTER
= V
OFFSET
= 0 V, G = 1/G = 2 ±4/±8 mV
RTO, 300 meters of cable, G = 1/G = 2 ±10/±30 mV
Output Offset Voltage Drift RTO, G = 1/G = 2 2.6/3.2 µV/°C