Datasheet

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ELECTRICAL CHARACTERISTICS
DAC8805
SBAS391A – DECEMBER 2006 – REVISED MAY 2007
All specifications at T
A
= –40 ° C to +125°C, V
DD
= +2.7V to +5.5V, I
OUT
= virtual GND, GND = 0V, and V
REF
= 10V, unless otherwise noted.
DAC8805
PARAMETER CONDITIONS MIN TYP MAX UNITS
STATIC PERFORMANCE
Resolution 14 Bits
Relative accuracy INL ± 0.5 ± 1 LSB
Differential nonlinearity DNL ± 0.5 ± 1 LSB
Output leakage current Data = 0000h, T
A
= +25 ° C 10 nA
Output leakage current Data = 0000h, Full temperature range 20 nA
Unipolar, data = 3FFFh ± 1 ± 4 mV
Full-scale gain error
Bipolar, data = 3FFFh ± 1 ± 4 mV
Full-scale temperature coefficient ± 1 ± 2 ppm/ ° C
T
A
= +25 ° C ± 1 ± 3 mV
Bipolar zero error
Full temperature range ± 1 ± 3 mV
Power-supply rejection ratio PSRR V
DD
= 5V ± 10% ± 0.1 ± 0.5 LSB/V
OUTPUT CHARACTERISTICS
(1)
Output current 2 mA
Output capacitance Code dependent 50 pF
REFERENCE INPUT
Reference voltage range V
REF
–18 18 V
Input resistance (unipolar) R
REF
4 5 6 k Ω
Input capacitance 5 pF
R
1
, R
2
4 5 6 k Ω
Feedback and offset resistance R
OFS
, R
FB
8 10 12 k Ω
LOGIC INPUTS AND OUTPUT
(1)
V
IL
V
DD
= +2.7V 0.6 V
Input low voltage
V
IL
V
DD
= +5V 0.8 V
V
IH
V
DD
= +2.7V 2.1 V
Input high voltage
V
IH
V
DD
= +5V 2.4 V
Input leakage current I
IL
0.001 1 µ A
Input capacitance C
IL
8 pF
POWER REQUIREMENTS
Supply voltage V
DD
2.7 5.5 V
Supply current I
DD
Normal operation, logic inputs = 0V 3 6 µ A
V
DD
= +4.5V to +5.5V V
IH
= V
DD
and V
IL
= GND 3 6 µ A
V
DD
= +2.7V to +3.6V V
IH
= V
DD
and V
IL
= GND 1 3 µ A
AC CHARACTERISTICS
(1) (2)
To 0.1% of full-scale,
Output current settling time t
S
0.3 µ s
Data = 0000h to 3FFFh to 0000h
To 0.006% of full-scale,
t
S
0.5 µ s
Data = 0000h to 3FFFh to 0000h
Reference multiplying BW BW – 3dB V
REF
= 5V
PP
, Data = 3FFFh, 2-quadrant mode 10 MHz
V
REF
= 0V to 10V,
DAC glitch impulse 5 nV–s
Data = 1FFFh to 2000h to 1FFFh
Data = 0000h, V
REF
= 100kHz, ± 10V
PP
,
Feedthrough error V
OUT
/V
REF
–70 dB
2-quadrant mode
Crosstalk error V
OUT
A/V
REF
B Data = 0000h, V
REF
B = 100mV
RMS
, f = 100kHz –100 dB
LDAC = Logic low, V
REF
= –10V to + 10V
Digital feedthrough 1 nV–s
Any code change
Total harmonic distortion THD V
REF
= 6V
RMS
, Data = 3FFFh, f = 1kHz –105 dB
Output noise density e
N
f = 1kHz, BW = 1Hz, 2-quadrant mode 12 nV/ √ Hz
(1) Specified by design and characterization; not production tested.
(2) All ac characteristic tests are performed in a closed-loop system using a THS4011 I-to-V converter amplifier.
3
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