Datasheet

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ELECTRICAL CHARACTERISTICS
DAC8881
SBAS422A – JULY 2007 – REVISED SEPTEMBER 2007
All specifications at T
A
= T
MIN
to T
MAX
, AV
DD
= DV
DD
= +2.7V to +5.5V, IOV
DD
= +1.8V to +5.5V, gain = 1X mode, unless
otherwise noted.
DAC8881
PARAMETER CONDITIONS MIN TYP MAX UNIT
ACCURACY
Linearity error Measured by line passing through codes 0200h and FE00h ± 0.5 ± 1 LSB
Differential linearity error Measured by line passing through codes 0200h and FE00h ± 0.25 ± 1 LSB
Monotonicity 16 Bits
T
A
= +25 ° C, code = 0200h ± 4 LSB
Zero-scale error
T
MIN
to T
MAX
, code = 0200h ± 8 LSB
Zero-scale drift Code = 0200h ± 0.5 ± 1 ppm/ ° C of FSR
T
A
= +25 ° C, Measured by line passing through codes
Gain error ± 4 ± 8 LSB
0200h and FE00h
Gain temperature drift Measured by line passing through codes 0200h and FE00h ± 0.5 ± 1 ppm/ ° C
PSRR V
OUT
= full-scale, AV
DD
= +5V ± 10% 2 LSB/V
ANALOG OUTPUT
(1)
Voltage output
(2)
0 AV
DD
V
Device operating for 500 hours 5 ppm of FSR
Output voltage drift vs time
Device operating for 1000 hours 8 ppm of FSR
Output current 2.5 mA
Maximum load capacitance 200 pF
Short-circuit current +31, – 50 mA
REFERENCE INPUT
(1)
AV
DD
= +5.5V 1.25 5.0 AV
DD
V
V
REFH
input voltage range
AV
DD
= +3V 1.25 2.5 AV
DD
V
V
REFH
input capacitance 5 pF
V
REFH
input impedance 4.5 k Ω
V
REFL
input voltage range – 0.2 0 +0.2 V
V
REFL
input capacitance 4.5 pF
V
REFL
input impedance 5 k Ω
DYNAMIC PERFORMANCE
(1)
To ± 0.003% FS, R
L
= 10k Ω , C
L
= 50pF, code 1000h to
Settling time 5 μ s
F000h
Slew rate From 10% to 90% of 0V to +5V 2.5 V/ μ s
V
REFH
= 5V, gain = 1X mode 37 nV-s
V
REFH
= 2.5V, gain = 1X mode 18 nV-s
Code = 7FFFh to
Code change glitch V
REFH
= 1.25V, gain = 1X mode 9 nV-s
8000h to 7FFFh
V
REFH
= 2.5V, gain = 2X mode 21 nV-s
V
REFH
= 1.25V, gain = 2X mode 10 nV-s
Digital feedthrough 1 nV-s
Gain = 1 24 30 nV/ √ Hz
f = 1kHz to 100kHz,
Output noise voltage density
full-scale output
Gain = 2 40 48 nV/ √ Hz
Output noise voltage f = 0.1Hz to 10Hz, full-scale output 2 μ V
PP
(1) Ensured by design. Not production tested.
(2) The output from the V
OUT
pin = [(V
REFH
– V
REFL
)/65536] × CODE × Buffer GAIN + V
REFL
. The maximum range of V
OUT
is 0V to AV
DD
.
The full-scale of the output must be less than AV
DD
; otherwise, output saturation occurs.
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