Datasheet

AD9481
Rev. 0 | Page 3 of 28
DC SPECIFICATIONS
AVDD = 3.3 V, DRVDD = 3.3 V; T
MIN
= −40°C, T
MAX
= +85°C, A
IN
= −1 dBFS, full scale = 1.0 V, internal reference, differential analog and
clock inputs, unless otherwise noted.
Table 1.
AD9481-250
Parameter Temp Test Level Min Typ Max Unit
RESOLUTION 8 Bits
ACCURACY
No Missing Codes Full VI Guaranteed
Offset Error 25°C I −40 40 mV
Gain Error
1
25°C I −6.0 6.0 % FS
Differential Nonlinearity (DNL) Full VI −0.85 ±0.35 0.85 LSB
Integral Nonlinearity (INL) Full VI −0.9 ±0.26 0.9 LSB
TEMPERATURE DRIFT
Offset Error Full V 30 µV/°C
Gain Error Full V 0.03 % FS/°C
Reference Full V ±0.025 mV/°C
REFERENCE
Internal Reference Voltage Full VI 0.97 1.0 1.03 V
Output Current
2
25°C IV 1.5 mA
I
VREF
Input Current
3
25°C I 100 µA
I
SENSE
Input Current
2
25°C I 10 µA
ANALOG INPUTS (VIN+, VIN−)
Differential Input Voltage Range
4
Full V 1 V p-p
Common-Mode Voltage Full VI 1.6 1.9 2.1 V
Input Resistance Full VI 8.4 10 11.2 kΩ
Input Capacitance 25°C V 4 pF
Analog Bandwidth, Full Power 25°C V 750 MHz
POWER SUPPLY
AVDD Full IV 3.0 3.3 3.6 V
DRVDD Full IV 3.0 3.3 3.6 V
Supply Currents
IAVDD
5
Full VI 133 145 mA
IDRVDD
5
Full VI 39 42.5 mA
Power Dissipation
5
25°C V 439 mW
Power-Down Dissipation 25°C V 15 37 mW
Power Supply Rejection Ratio (PSRR) 25°C V −4.2 mV/V
1
Gain error and gain temperature coefficients are based on the ADC only (with a fixed 1 V external reference and 1 V p-p input range).
2
Internal reference mode; SENSE = AGND.
3
External reference mode; VREF driven by external 1.0 V reference; SENSE = AVDD.
4
In FS = 1 V, both analog inputs are 500 mV p-p and out of phase with each other.
5
Supply current measured with rated encode and a 20 MHz analog input. Power dissipation measured with dc input, see the T section for power vs. clock
rate.
erminology