Data Sheet
ADA4950-1/ADA4950-2
Rev. A | Page 3 of 28
SPECIFICATIONS
±5 V OPERATION
TA = 25°C, +VS = 5 V, VS = 5 V, VOCM = 0 V, G = 1, RT = 53.6 Ω (when used), RL,dm = 1 k, unless otherwise noted. All specifications
refer to single-ended input and differential outputs, unless otherwise noted. Refer t
o Figure 52 for signal definitions.
Differential Inputs to VOUT,dm Performance
Table 1.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
3 dB Small-Signal Bandwidth
VOUT, dm = 0.1 V p-p
750
MHz
3 dB Large-Signal Bandwidth
VOUT, dm = 2.0 V p-p
350
MHz
Bandwidth for 0.1 dB Flatness
VOUT, dm = 2.0 V p-p, RL = 200
ADA4950-1
210
MHz
ADA4950-2
230
MHz
Slew Rate
VOUT, dm = 2 V p-p, 25% to 75%
2900
V/s
Settling Time to 0.1%
VOUT, dm = 2 V step
9
ns
Overdrive Recovery Time
VIN = 0 V to 5 V ramp, G = 2
20
ns
NOISE/HARMONIC PERFORMANCE
Second Harmonic
VOUT, dm = 2 V p-p
1 MHz
108
dBc
10 MHz
107
dBc
20 MHz
98
dBc
50 MHz
80
dBc
Third Harmonic
VOUT, dm = 2 V p-p
1 MHz
126
dBc
10 MHz
105
dBc
20 MHz
99
dBc
50 MHz
84
dBc
IMD3
f1 = 30 MHz, f2 = 30.1 MHz, VOUT, dm = 2 V p-p
94
dBc
Voltage Noise (Referred to Output)
f = 1 MHz
Gain = 1
9.2
nV/√Hz
Gain = 2
12.5
nV/√Hz
Gain = 3
16.6
nV/√Hz
Crosstalk (ADA4950-2)
f = 10 MHz; Channel 2 active, Channel 1
output
87
dB
INPUT CHARACTERISTICS
Offset Voltage (Referred to Input)
V+DIN = VDIN = VOCM = 0 V
2.5
±0.2
+2.5
mV
TMIN to TMAX variation
–3.7
V/°C
Input Capacitance
Single-ended at package pin
0.5
pF
Input Common-Mode Voltage Range
Directly at internal amplifier inputs, not
external input terminals
VS + 0.2 to
+VS 1.8
V
CMRR
DC, VOUT, dm/VIN, cm, VIN, cm = ±1 V
64
49
dB
Open-Loop Gain
64
66
dB
OUTPUT CHARACTERISTICS
Output Voltage Swing
Maximum VOUT, single-ended output,
RL = 1 k
–VS + 1.4 to
+VS – 1.4
VS + 1.2 to
+VS 1.2
V
Linear Output Current
200 kHz, RL, dm = 10 , SFDR = 69 dB
114
mA peak
Output Balance Error
VOUT, cm/VOUT, dm, VOUT, dm = 2 V p-p, 1 MHz;
62
dB
Gain Error
Gain = 1
0.5
1.2
%
Gain = 2
1.0
1.9
%
Gain = 3
0.8
1.7
%