Datasheet

ADA4939-1/ADA4939-2
Rev. 0 | Page 5 of 24
3.3 V OPERATION
T
A
= 25°C, +V
S
= 3.3 V, −V
S
= 0 V, V
OCM
= +V
S
/2, R
F
= 402 , R
G
= 200 , R
T
= 60.4  (when used), R
L, dm
= 1 kΩ, unless otherwise noted.
All specifications refer to single-ended input and differential outputs, unless otherwise noted. Refer to
Figure 42 for signal definitions.
±D
IN
to V
OUT, dm
Performance
Table 4.
Parameter Conditions Min Typ Max Unit
DYNAMIC PERFORMANCE
−3 dB Small Signal Bandwidth V
OUT, dm
= 0.1 V p-p 1400 MHz
Bandwidth for 0.1 dB Flatness V
OUT, dm
= 0.1 V p-p, ADA4939-1 300 MHz
V
OUT, dm
= 0.1 V p-p, ADA4939-2 90 MHz
Large Signal Bandwidth V
OUT, dm
= 2 V p-p 1400 MHz
Slew Rate V
OUT, dm
= 2 V p-p, 25% to 75% 5000 V/μs
Overdrive Recovery Time V
IN
= 0 V to 1.0 V step, G = 3.16 <1 ns
NOISE/HARMONIC PERFORMANCE See Figure 41 for distortion test circuit
Second Harmonic V
OUT, dm
= 2 V p-p, 10 MHz −100 dBc
V
OUT, dm
= 2 V p-p, 70 MHz −90 dBc
V
OUT, dm
= 2 V p-p, 100 MHz −83 dBc
Third Harmonic V
OUT, dm
= 2 V p-p, 10 MHz −94 dBc
V
OUT, dm
= 2 V p-p, 70 MHz −82 dBc
V
OUT, dm
= 2 V p-p, 100 MHz −75 dBc
IMD f
1
= 70 MHz, f
2
= 70.1 MHz, V
OUT, dm
= 2 V p-p −87 dBc
f
1
= 140 MHz, f
2
= 140.1 MHz, V
OUT, dm
= 2 V p-p −70 dBc
Voltage Noise (RTI) f = 100 kHz 2.3 nV/√Hz
Input Current Noise f = 100 kHz 6 pA/√Hz
Crosstalk f = 100 MHz, ADA4939-2 −80 dB
INPUT CHARACTERISTICS
Offset Voltage V
OS, dm
= V
OUT, dm
/2, V
DIN+
= V
DIN−
= +V
S
/2 −3.5 ±0.5 +3.5 mV
T
MIN
to T
MAX
variation ±2.0 μV/°C
Input Bias Current −26 −10 +2.2 μA
T
MIN
to T
MAX
variation ±0.5 μA/°C
Input Offset Current −11.2 ±0.4 +11.2
Input Resistance Differential 180 kΩ
Common mode 450 kΩ
Input Capacitance 1 pF
Input Common-Mode Voltage 0.9 2.4 V
CMRR ∆V
OUT, dm
/∆V
IN, cm
, ∆V
IN, cm
= ±1 V −85 −75 dB
OUTPUT CHARACTERISTICS
Output Voltage Swing Maximum ∆V
OUT
, single-ended output, R
F
= R
G
= 10 kΩ 0.8 2.5 V
Linear Output Current 75 mA
Output Balance Error
∆V
OUT, cm
/∆V
OUT, dm
, ∆V
OUT, dm
= 1 V, f = 10 MHz,
see
Figure 40 for test circuit
−61 dB