Datasheet
Data Sheet AD5628/AD5648/AD5668
Rev. G | Page 5 of 32
V
DD
= 2.7 V to 3.6 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 2.
A Grade
1
B Grade
1
Parameter Min Typ Max Min Typ Max Unit 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
3
–80 –80 dB V
DD
± 10%
DC Crosstalk
3
(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
3
(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
= 3 V
Power-Up Time
4
4
µs
Coming out of power-down mode, V
DD
= 3 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
Reference Input Impedance 14.6 14.6 kΩ
REFERENCE OUTPUT
Output Voltage
AD5628/AD5648/AD5668-1 1.247 1.253 1.247 1.253 V At ambient
Reference TC
3
5 15 5 15 ppm/°C TSSOP
15 5 15 ppm/°C LFCSP
15 ppm/°C WLCSP
Reference Output
Impedance
7.5
7.5
kΩ