Datasheet

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ELECTRICAL CHARACTERISTICS
DAC7822
SBAS374A – JUNE 2006 – REVISED JULY 2007
V
DD
= +2.5V to +5.5V; I
OUT
1 = Virtual GND; I
OUT
2 = 0V; V
REF
= 10V; T
A
= full operating temperature. All specifications –40 ° C
to +125 ° C, unless otherwise noted.
DAC7822
PARAMETER CONDITIONS MIN TYP MAX UNITS
STATIC PERFORMANCE
Resolution 12 Bits
Relative accuracy ±1 LSB
Differential nonlinearity ±1 LSB
Output leakage current Data = 000h, T
A
= +25 ° C ±1 nA
Output leakage current Data = 000h, T
A
= T
MAX
±15 nA
Full-scale gain error All ones loaded to DAC register ±10 ±25 mV
Full-scale tempco
(1)
± 5 ppm/ °C
Bipolar zero-code error Circuit configuration as shown in Figure 41 ±25 mV
Output capacitance DAC latches leaded with all 1s 25 30 pF
REFERENCE INPUT
V
REF
range –15 15 V
V
REF
A, V
REF
B, Input resistance 8 10 12 k Ω
R
1
, R
FB
resistance 17 20 25 k Ω
R
2
, R
3
resistance 17 20 25 k Ω
V
REF
A to V
REF
B Input Mismatch 1.6 2.5 %
R
2
to R
3
Mismatch 0.06 0.18 %
LOGIC INPUTS AND OUTPUT
(1)
V
DD
= +2.5V 0.6 V
Input low voltage V
IL
V
DD
= +5V 0.8 V
V
DD
= +2.5V 2.1 V
Input high voltage V
IH
V
DD
= +5V 2.4 V
Input leakage current I
IL
1 µA
Input capacitance C
IL
10 pF
POWER REQUIREMENTS
V
DD
2.5 5.5 V
I
DD
(normal operation) Logic inputs = 0V 5 µA
V
DD
= +4.5V to +5.5V V
IH
= V
DD
and V
IL
= GND 0.8 5 µA
V
DD
= +2.5V to +3.6V V
IH
= V
DD
and V
IL
= GND 0.4 2.5 µA
AC CHARACTERISTICS
(1)
Output voltage settling time 0.2 µs
Reference multiplying BW V
REF
= 7V
PP
, Data = FFFh 10 MHz
V
REF
= 0V to 10V,
DAC glitch impulse 10 nV-s
Data = 7FFh to 800h to 7FFh
Feedthrough error V
OUT
/V
REF
Data = 000h, V
REF
= 100kHz –70 dB
Digital feedthrough 2 nV-s
Total harmonic distortion –105 dB
Output spot noise voltage 25 nV/ √ Hz
(1) Specified by design and characterization; not production tested.
3
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