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ADA4950-2 数据表(PDF) 5 Page - Analog Devices

部件名 ADA4950-2
功能描述  Low Power, Selectable Gain Differential ADC Driver, G = 1, 2, 3
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

ADA4950-2 数据表(HTML) 5 Page - Analog Devices

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ADA4950-1/ADA4950-2
Rev. 0 | Page 5 of
28
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 VOUT, dm Performance
Table 4.
Parameter
Test Conditions/Comments
Min
Typ
Max
Unit
DYNAMIC PERFORMANCE
−3 dB Small-Signal Bandwidth
VOUT, dm = 0.1 V p-p
770
MHz
−3 dB Large-Signal Bandwidth
VOUT, dm = 2.0 V p-p
320
MHz
Bandwidth for 0.1 dB Flatness
VOUT, dm = 2.0 V p-p, RL = 200 Ω
ADA4950-1
220
MHz
ADA4950-2
160
MHz
Slew Rate
VOUT, dm = 2 V p-p, 25% to 75%
2200
V/μs
Settling Time to 0.1%
VOUT, dm = 2 V step
10
ns
Overdrive Recovery Time
VIN = 0 V to 2.5 V ramp, G = 2
19
ns
NOISE/HARMONIC PERFORMANCE
See Figure 51 for distortion test circuit
Second Harmonic
VOUT, dm = 2 V p-p
1 MHz
−108
dBc
10 MHz
−107
dBc
20 MHz
−98
dBc
50 MHz
−82
dBc
Third Harmonic
VOUT, dm = 2 V p-p
1 MHz
−124
dBc
10 MHz
−114
dBc
20 MHz
−99
dBc
50 MHz
−83
dBc
IMD3
f1 = 30 MHz, f2 = 30.1 MHz, VOUT, dm = 2 V p-p
−94
dBc
Voltage Noise (Referred to Input)
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 = V−DIN = VOCM = 2.5 V
−4
±0.4
+4
mV
TMIN to TMAX variation
−3.7
μV/°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 kΩ
–VS + 1.2 to
+VS – 1.2
–VS + 1.1 to
+VS – 1.1
V
Linear Output Current
200 kHz, RL, dm = 10 Ω, SFDR = 67 dB
70
mA peak
Output Balance Error
∆VOUT, cm/∆VOUT, dm, ∆VOUT, dm = 1 V p-p, 1 MHz;
see Figure 50 for output balance test circuit
−62
dB
Gain Error
Gain = 1
0.5
1.2
%
Gain = 2
1.0
1.9
%
Gain = 3
0.8
1.7
%


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