Datasheet

AD9218
Rev. C | Page 3 of 28
SPECIFICATIONS
DC SPECIFICATIONS
V
DD
= 3.0 V, V
D
= 3.0 V; external reference, unless otherwise noted.
Table 1.
AD9218BST-40/-65 AD9218BST-80/-105
Parameter Temp
Test
Level
Min Typ Max Min Typ Max Unit
RESOLUTION 10 10 Bits
ACCURACY
No Missing Codes
1
Full VI Guaranteed, not tested Guaranteed, not tested
Offset Error
2
25°C I –18 2 18 –18 2 18 LSB
Gain Error
2
25°C I –2 3 8 –2 3.5 8 % FS
Differential Nonlinearity
(DNL)
25°C I –1 ±0.3/±0.6 1/1.3 –1 ±0.5/±0.8 1.2/1.7 LSB
Full VI ±0.8 ±0.6/±0.9 LSB
Integral Nonlinearity
(INL)
25°C I –1/–1.6 ±0.3/±1 1/1.6 –1.35/–2.7 ±0.75/±2 +1.35/2.7 LSB
Full VI ±1 ±1/±2.3 LSB
TEMPERATURE DRIFT
Offset Error Full V 10 4 ppm/°C
Gain Error
2
Full V 80 100 ppm/°C
Reference Full V 40 40 ppm/°C
REFERENCE
Internal Reference Voltage 25°C I 1.18 1.24 1.28 1.18 1.24 1.28 V
(REF
OUT
)
Input Resistance (REF
IN
A,
REF
IN
B)
Full VI 9 11 13 9 11 13 kΩ
ANALOG INPUTS
Differential Input Voltage
Range (A
IN,
A
IN
)
3
Full V 1 or 2 1 V
Common-Mode Voltage
3
Full V V
D
/3 V
D
/3 V
Input Resistance Full VI 8 10 14 8 10 14 kΩ
Input Capacitance 25°C V 3 3 pF
POWER SUPPLY
V
D
Full IV 2.7 3 3.6 2.7 3 3.6 V
V
DD
Full IV 2.7 3 3.6 2.7 3 3.6 V
Supply Currents
IV
D
(V
D
= 3.0 V)
4
Full VI 108/117 113/130 172/183 175/188 mA
IV
DD
(V
DD
= 3.0 V)
4
25°C V 7/11 13/17 mA
Power Dissipation DC
5
Full VI 325/350 340/390 515/550 525/565 mW
IV
D
Power-Down Current
6
Full VI 20 22 mA
Power Supply Rejection
Ratio
25°C I
±1 ±1 mV/V
1
No missing codes across industrial temperature range guaranteed for 40 MSPS, 65 MSPS, and 80 MSPS grades. No missing codes at room temperature guaranteed for
105 MSPS grade.
2
Gain error and gain temperature coefficients are based on the ADC only (with a fixed 1.25 V external reference) 65 grade in 2 V p-p range, 40, 80, 105 grades in 1 V p-p range.
3
(A
IN
–
A
IN
) = ±0.5 V in 1 V range (full scale), (A
IN
–
A
IN
) = ±1 V in 2 V range (full scale). The analog inputs self-bias to V
D
/3. This common-mode voltage can be overdriven
externally by a low impedance source by ±300 mV (differential drive, gain = 1) or ±150 mV (differential drive, gain = 2).
4
AC power dissipation measured with rated encode and a 10.3 MHz analog input @ 0.5 dBFS, C
LOAD
= 5 pF.
5
DC power dissipation measured with rated encode and a dc analog input (outputs static, IV
DD
= 0).
6
In power-down state, IV
DD
= ±10 μA typical (all grades).