Datasheet

Data Sheet AD9645
Rev. 0 | Page 3 of 36
SPECIFICATIONS
DC SPECIFICATIONS
AVDD = 1.8 V, DRVDD = 1.8 V, 2 V p-p differential input, 1.0 V internal reference, AIN = −1.0 dBFS, unless otherwise noted.
Table 1.
Parameter
1
Temp
AD9645-80 AD9645-125
Min Typ Max Min Typ Max Unit
RESOLUTION 14 14 Bits
ACCURACY
No Missing Codes Full Guaranteed Guaranteed
Offset Error Full −0.6 −0.2 +0.1 −0.6 −0.2 +0.2 % FSR
Offset Matching Full −0.2 +0.1 +0.4 −0.2 +0.1 +0.4 % FSR
Gain Error Full −4.3 −1.0 +2.2 −5.1 −1.5 +2.3 % FSR
Gain Matching Full 0.5 2.2 0.6 2.6 % FSR
Differential Nonlinearity (DNL) Full −0.6 +1.3 −0.6 +1.3 LSB
25°C ±0.65 ±0.65 LSB
Integral Nonlinearity (INL) Full −2.6 +2.8 −3.6 +3.4 LSB
25°C ±1.1 ±1.5 LSB
TEMPERATURE DRIFT
Offset Error Full 2.7 3.3 ppm/°C
INTERNAL VOLTAGE REFERENCE
Output Voltage (1 V Mode) Full 0.98 1.0 1.02 0.98 1.0 1.02 V
Load Regulation at 1.0 mA (V
REF
= 1 V) 25°C 2 2 mV
Input Resistance 25°C 7.5 7.5 kΩ
INPUT-REFERRED NOISE
V
REF
= 1.0 V 25°C 0.95 1.0 LSB rms
ANALOG INPUTS
Differential Input Voltage (V
REF
= 1 V) Full 2 2 V p-p
Common-Mode Voltage Full 0.9 0.9 V
Common-Mode Range 25°C 0.5 1.3 0.5 1.3 V
Differential Input Resistance 25°C 5.2 5.2 kΩ
Differential Input Capacitance 25°C 3.5 3.5 pF
POWER SUPPLY
AVDD
Full
1.7
1.8
1.9
1.7
1.8
1.9
V
DRVDD Full 1.7 1.8 1.9 1.7 1.8 1.9 V
I
AVDD
2
Full 56 61 78 83 mA
I
DRVDD
(ANSI-644 Mode)
2
Full 48 50 57 60 mA
I
DRVDD
(Reduced Range Mode)
2
25°C 39 48 mA
TOTAL POWER CONSUMPTION
DC Input Full 178 191 227 244 mW
Sine Wave Input (Two Channels; Includes Output Drivers in
ANSI-644 Mode)
Full 187 200 243 257 mW
Sine Wave Input (Two Channels; Includes Output Drivers in
Reduced Range Mode)
25°C 171 227 mW
Power-Down 25°C 2 2 mW
Standby
3
Full 92 101 115 126 mW
1
See the AN-835 Application Note, Understanding High Speed ADC Testing and Evaluation, for definitions and for details on how these tests were completed.
2
Measured with a low input frequency, full-scale sine wave on both channels.
3
Can be controlled via the SPI.