Datasheet


      
   
SLAS233D − JULY 1999 − REVISED JULY 2002
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating conditions (unless otherwise noted)
power supply
PARAMETER TEST CONDITIONS MIN TYP MAX
UNIT
I
DD
Power supply current
No load, All inputs = AGND or
Fast 1.8 2.3
mA
I
DD
Power supply current
No load, All inputs = AGND or
V
DD
, DAC latch = 0x800
Slow
0.8
1
mA
I
DD
Power supply current
V
DD
, DAC latch = 0x800
Slow
0.8
1
mA
DD
V
DD
, DAC latch = 0x800
Slow
0.8
1
Power-down supply current 1 3 µA
PSRR
Power supply rejection ratio
Zero scale, See Note 2 −65
dB
PSRR Power supply rejection ratio
Full scale, See Note 3 −65
dB
NOTES: 2. Power supply rejection ratio at zero scale is measured by varying V
DD
and is given by:
PSRR = 20 log [(E
ZS
(V
DD
max) − E
ZS
(V
DD
min)/V
DD
max]
3. Power supply rejection ratio at full scale is measured by varying V
DD
and is given by:
PSRR = 20 log [(E
G
(V
DD
max) − E
G
(V
DD
min)/V
DD
max]
static DAC specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Resolution 8 bits
INL Integral nonlinearity See Note 4 ± 0.3 ± 0.5 LSB
DNL Differential nonlinearity See Note 5 ± 0.07 ± 0.2 LSB
E
ZS
Zero-scale error (offset error at zero scale) See Note 6 ± 12 mV
E
ZS
TC Zero-scale-error temperature coefficient See Note 7 10 ppm/°C
E
G
Gain error See Note 8 ± 0.5
% full
scale V
E
G
T
C
Gain-error temperature coefficient See Note 9 10 ppm/°C
NOTES: 4. The relative accuracy of integral nonlinearity (INL), sometimes referred to as linearity error, is the maximum deviation of the output
from the line between zero and full scale, excluding the effects of zero-code and full-scale errors.
5. The differential nonlinearity (DNL), sometimes referred to as differential error, is the difference between the measured and ideal
1-LSB amplitude change of any two adjacent codes.
6. Zero-scale error is the deviation from zero voltage output when the digital input code is zero.
7. Zero-scale error temperature coefficient is given by: E
ZS
TC = [E
ZS
(T
max
) − E
ZS
(T
min
)]/2V
ref
× 10
6
/(T
max
− T
min
).
8. Gain error is the deviation from the ideal output (2V
ref
− 1 LSB) with an output load of 10 kΩ.
9. Gain temperature coefficient is given by: E
G
T
C
= [E
G
(T
max
) − E
g
(T
min
)]/2V
ref
× 10
6
/(T
max
− T
min
).
output specifications
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
O
Output voltage range R
L
= 10 kΩ 0 V
DD
−0.4 V
Output load regulation accuracy V
O =
4.096 V, 2.048 V R
L
= 2 kΩ ± 0.29 % FS
reference input
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
I
Input voltage range 0 V
DD−1.5
V
R
I
Input resistance 10 MΩ
C
I
Input capacitance 5 pF
Reference input bandwidth
REF = 0.2 V
pp
+ 1.024 V dc
Fast 1.3 MHz
Reference input bandwidth
REF = 0.2 V
pp
+ 1.024 V dc
Slow 525 kHz
Reference feedthrough REF = 1 V
pp
at 1 kHz + 1.024 V dc (see Note 10) −80 dB
NOTE 10: Reference feedthrough is measured at the DAC output with an input code = 0x000.