Rainbow Electronics ADC081000 - Manual (Page 7)

Converter Electrical Characteristics
(Continued)
The following specifications apply after calibration for V
A
= V
DR
= +1.9V
DC
, OutV = 1.9V, V
IN
FSR (a.c. coupled) = differential
800mV
P-P
, C
L
= 10 pF, Differential, a.c. coupled Sinewave Clock, f
CLK
= 1 GHz at 0.5V
P-P
with 50% duty cycle, R
EXT
= 3300 Ω
± 0.1%, Analog Signal Source Impedance = 100 Ω. Boldface limits apply for T
A
= T
MIN
to T
MAX
. All other limits T
A
= 25˚C,
unless otherwise stated. (Notes 6, 7)
Symbol Parameter Conditions
Typical
(Note 8)
Limits
(Note 8)
Units
(Limits)
STATIC CONVERTER CHARACTERISTICS
THD Total Harmonic Distortion
f
IN
= 100 MHz, V
IN
= FSR − 0.5 dB -57 dB
f
IN
= 248 MHz, V
IN
= FSR − 0.5 dB -57 −50 dB (max)
f
IN
= 498 MHz, V
IN
= FSR − 0.5 dB -57 −50 dB (max)
2nd Harm Second Harmonic Distortion
f
IN
= 100 MHz, V
IN
= FSR − 0.5 dB −64 dB
f
IN
= 248 MHz, V
IN
= FSR − 0.5 dB −64 dB
f
IN
= 498 MHz, V
IN
= FSR − 0.5 dB −64 dB
3rd Harm Third Harmonic Distortion
f
IN
= 100 MHz, V
IN
= FSR − 0.5 dB −64 dB
f
IN
= 248 MHz, V
IN
= FSR − 0.5 dB −64 dB
f
IN
= 498 MHz, V
IN
= FSR − 0.5 dB −64 dB
SFDR Spurious-Free dynamic Range
f
IN
= 100 MHz, V
IN
= FSR − 0.5 dB 58.5 dB
f
IN
= 248 MHz, V
IN
= FSR − 0.5 dB 58.5 50 dB (min)
f
IN
= 498 MHz, V
IN
= FSR − 0.5 dB 58.5 50 dB (min)
IMD Intermodulation Distortion
f
IN1
= 121 MHz, V
IN
= FSR − 7 dB
f
IN2
= 126 MHz, V
IN
= FSR − 7 dB
-51 dB
Out of Range Output Code
(In addition to OR Output high)
(V
IN
+) − (V
IN
−) > + Full Scale 255
(V
IN
+) − (V
IN
−) < − Full Scale 0
ANALOG INPUT AND REFERENCE CHARACTERISTICS
V
IN
Full Scale Analog Differential Input
Range
FSR pin Low 600
550 mV
P-P
(min)
650 mV
P-P
(max)
FSR pin High 800
750 mV
P-P
(min)
850 mV
P-P
(max)
V
CMI
Common Mode Analog Input
Voltage
V
CMO
V
CMO
− 50
V
CMO
+ 50
mV (min)
mV (max)
C
IN
Analog Input Capacitance
(Note 10)
Differential 0.02 pF
Each input to ground 1.6 pF
R
IN
Differential Input Resistance 100
94 Ω (min)
106 Ω (max)
ANALOG OUTPUT CHARACTERISTICS
V
CMO
Common Mode Output Voltage I
CMO
= ± 1 µA 1.21
0.95
1.45
V (min)
V (max)
TC V
CMO
Common Mode Output Voltage
Temperature Coefficient
T
A
= −40˚C to +85˚C 118 ppm/˚C
V
BG
Bandgap Reference Output
Voltage
I
BG
= ± 100 µA 1.26
1.22
1.33
V (min)
V (max)
TC V
BG
Bandgap Reference Voltage
Temperature Coefficient
T
A
= −40˚C to +85˚C,
I
BG
= ± 100 µA
-28 ppm/˚C
CLOCK INPUT CHARACTERISTICS
V
ID
Differential Clock Input Level
Square Wave Clock 0.6
0.4
2.0
V
P-P
(min)
V
P-P
(max)
Sine Wave Clock 0.6
0.4
2.0
V
P-P
(min)
V
P-P
(max)
I
I
Input Current V
IN
= 0V or V
IN
= V
A
± 1 µA
C
IN
Input Capacitance (Note 10)
Differential 0.02 pF
Each Input to Ground 1.5 pF
ADC081000
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