Datasheet

AD5628/AD5648/AD5668 Data Sheet
Rev. J | Page 4 of 30
SPECIFICATIONS
V
DD
= 4.5 V to 5.5 V, R
L
= 2 kΩ to GND, C
L
= 200 pF to GND, V
REFIN
= V
DD
. All specifications T
MIN
to T
MAX
, unless otherwise noted.
Table 1.
A Grade
1
B Grade
1
Parameter Min Typ Max Min Typ Max Unit Test Conditions/Comments
STATIC PERFORMANCE
2
AD5628
Resolution 12 12 Bits
Relative Accuracy ±0.5 ±4 ±0.5 ±1 LSB See Figure 9
Differential Nonlinearity ±0.25 ±0.25 LSB
Guaranteed monotonic by design
(see Figure 12)
AD5648
Resolution 14 14 Bits
Relative Accuracy ±2 ±8 ±2 ±4 LSB See Figure 8
Differential Nonlinearity ±0.5 ±0.5 LSB
Guaranteed monotonic by design
(see Figure 11)
AD5668
Resolution 16 16 Bits
Relative Accuracy ±8 ±32 ±8 ±16 LSB See Figure 7
Differential Nonlinearity ±1 ±1 LSB
Guaranteed monotonic by design
(see Figure 10)
Zero-Code Error 6 19 6 19 mV All 0s loaded to DAC register (see Figure 26)
Zero-Code Error Drift ±2 ±2 μV/°C
Full-Scale Error −0.2 −1 −0.2 −1 % FSR All 1s loaded to DAC register (see Figure 27)
Gain Error ±1 ±1 % FSR
Gain Temperature Coefficient ±2.5 ±2.5 ppm Of FSR/°C
Offset Error ±6 ±19 ±6 ±19 mV
DC Power Supply Rejection Ratio –80 –80 dB V
DD
± 10%
DC Crosstalk (External Reference) 10 10 μV
Due to full-scale output change,
R
L
= 2 kΩ to GND or V
DD
5 5 μV/mA Due to load current change
10 10 μV Due to powering down (per channel)
DC Crosstalk (Internal Reference) 25 25 μV
Due to full-scale output change,
R
L
= 2 kΩ to GND or V
DD
10 10 μV/mA Due to load current change
OUTPUT CHARACTERISTICS
3
Output Voltage Range 0 V
DD
0 V
DD
V
Capacitive Load Stability 2 2 nF R
L
= ∞
10 10 nF R
L
= 2 kΩ
DC Output Impedance 0.5 0.5 Ω
Short-Circuit Current 30 30 mA V
DD
= 5 V
Power-Up Time 4 4 μs Coming out of power-down mode, V
DD
= 5 V
REFERENCE INPUTS
Reference Current 40 55 40 55 μA V
REF
= V
DD
= 5.5 V (per DAC channel)
Reference Input Range 0 V
DD
0 V
DD
V
Reference Input Impedance 14.6 14.6
REFERENCE OUTPUT
Output Voltage
AD5628-2/AD5648-2/
AD5668-2, AD5668-3
2.495 2.505 2.495 2.505 V At ambient
Reference TC
3
5 10 5 10 ppm/°C TSSOP
15 5 10 ppm/°C LFCSP
Reference Output Impedance 7.5 7.5
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