Datasheet

AD8128
Rev. 0 | Page 3 of 12
SPECIFICATIONS
T
A
= 25°C, V
S
= ±5 V, R
L
= 150 Ω, Belden Cable, V
OFFSET
= 0 V, V
GAIN
and V
PEAK
set to optimized settings (see Figure 4), unless otherwise noted.
Table 1.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
–3 dB Large Signal Bandwidth V
OUT
= 2 V p-p, 100 meter CAT-5 120 MHz
±1 dB Equalized Bandwidth Flatness V
OUT
= 2 V p-p 70 MHz
Rise/Fall Time V
OUT
= 2 V step, 50 meter CAT-5 2 ns
Rise/Fall Time V
OUT
= 2 V step, 100 meter CAT-5 3.6 ns
Settling Time to 2% V
OUT
= 2 V step, 50 meter CAT-5 26 ns
Settling Time to 2% V
OUT
= 2 V step, 100 meter CAT-5 36.4 ns
Integrated Output Voltage Noise V
PEAK
= 0.9 V, V
GAIN
= 225 mV, BW = 1 GHz 1.5 mV rms
DC PERFORMANCE
Input Bias Current 15.5 24 μA
V
OFFSET
Pin Current 1.7 8.2 μA
V
GAIN
Pin Current 2 3.4 μA
V
PEAK
Pin Current 4.2 6.8 μA
INPUT CHARACTERISTICS
Input Differential Voltage ±2.8 V
Input Common-Mode Voltage ±3.0 V
Input Resistance Common mode 380 kΩ
Differential 675 kΩ
Input Capacitance 1.7 pF
Common-Mode Rejection Ratio (CMRR) 200 kHz, ΔV
OUT
/ΔV
IN, cm
−63 −74 dB
ADJUSTMENT PINS
V
PEAK
Input Voltage Relative to ground 0 1 V
Maximum Peak Gain @ 120 MHz, V
PEAK
= 1 V 20 dB
V
GAIN
Input Relative to ground 0 1 V
Maximum Broadband Gain V
GAIN
= 1 V 3 dB
V
OFFSET
Input Range Relative to ground ±2.5 V
V
OFFSET
to V
OUT
Gain 1 V/V
OUTPUT CHARACTERISTICS
Output Voltage Swing −2.55 +2.7 V
Output Offset Voltage V
OFFSET
= 0 V, RTO −10.9 +7 +18.7 mV
Output Offset Voltage Drift −5.5 μV/°C
Short-Circuit Output Current 100 mA
POWER SUPPLY
Operating Voltage Range ±4.5 ±5.5 V
Quiescent Supply Current, I
CC
/I
EE
@ ±5 V +24/−21 +31/−27 mA
Supply Current Drift, I
CC
/I
EE
+86/−77 μA/°C
+Power Supply Rejection Ratio (PSRR) RTO −48 −59 dB
−Power Supply Rejection Ratio (PSRR) RTO −48 −61 dB
TEMPERATURE RANGE −40 +85 °C