ADA4950-1 Datasheet, PDF (5/28 Pages) Analog Devices – Low Power, Selectable Gain Differential ADC Driver, G = 1, 2, 3

ADA4950-1/ADA4950-2
5 V OPERATION
TA = 25°C, +VS = 5 V, −VS = 0 V, VOCM = 2.5 V, G = 1, RT = 53.6 Ω (when used), RL, dm = 1 kΩ, unless otherwise noted. All specifications
refer to single-ended input and differential outputs, unless otherwise noted. Refer to Figure 52 for signal definitions.
Differential Inputs to V_{OUT, dm} Performance
Table 4.
Parameter
DYNAMIC PERFORMANCE
−3 dB Small-Signal Bandwidth
−3 dB Large-Signal Bandwidth
Bandwidth for 0.1 dB Flatness
ADA4950-1
ADA4950-2
Slew Rate
Settling Time to 0.1%
Overdrive Recovery Time
NOISE/HARMONIC PERFORMANCE
Second Harmonic
Third Harmonic
IMD3
Voltage Noise (Referred to Input)
Crosstalk (ADA4950-2)
INPUT CHARACTERISTICS
Offset Voltage (Referred to Input)
Input Capacitance
Input Common-Mode Voltage Range
CMRR
Open-Loop Gain
OUTPUT CHARACTERISTICS
Output Voltage Swing
Linear Output Current
Output Balance Error
Gain Error
Test Conditions/Comments
VOUT, dm = 0.1 V p-p
VOUT, dm = 2.0 V p-p
VOUT, dm = 2.0 V p-p, RL = 200 Ω
VOUT, dm = 2 V p-p, 25% to 75%
VOUT, dm = 2 V step
VIN = 0 V to 2.5 V ramp, G = 2
See Figure 51 for distortion test circuit
VOUT, dm = 2 V p-p
1 MHz
10 MHz
20 MHz
50 MHz
VOUT, dm = 2 V p-p
1 MHz
10 MHz
20 MHz
50 MHz
f1 = 30 MHz, f2 = 30.1 MHz, VOUT, dm = 2 V p-p
f = 1 MHz
Gain = 1
Gain = 2
Gain = 3
f = 10 MHz; Channel 2 active, Channel 1
output
V+DIN = V−DIN = VOCM = 2.5 V
TMIN to TMAX variation
Single-ended at package pin
Directly at internal amplifier inputs, not
external input terminals
DC, ∆VOUT, dm/∆VIN, cm, ∆VIN, cm = ±1 V
Maximum ∆VOUT, single-ended output,
RL = 1 kΩ
200 kHz, RL, dm = 10 Ω, SFDR = 67 dB
∆VOUT, cm/∆VOUT, dm, ∆VOUT, dm = 1 V p-p, 1 MHz;
see Figure 50 for output balance test circuit
Gain = 1
Gain = 2
Gain = 3
Min
Typ
Max
770
320
220
160
2200
10
19
−108
−107
−98
−82
−124
−114
−99
−83
−94
9.2
12.5
16.6
−87
−4
±0.4
+4
−3.7
0.5
–VS + 0.2 to
+VS – 1.8
−64
−49
64
66
–VS + 1.2 to
+VS – 1.2
–VS + 1.1 to
+VS – 1.1
70
−62
0.5
1.2
1.0
1.9
0.8
1.7
Unit
MHz
MHz
MHz
MHz
V/μs
ns
ns
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
dBc
nV/√Hz
nV/√Hz
nV/√Hz
dB
mV
μV/°C
pF
V
dB
dB
V
mA peak
dB
%
%
%
Rev. 0 | Page 5 of 28