Datasheet
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DAC7811
SBAS337C – APRIL 2005 – REVISED JULY 2007
ELECTRICAL CHARACTERISTICS (continued)
V
DD
= +2.7 V to +5.5 V; I
OUT
1 = Virtual GND; I
OUT
2 = 0V; V
REF
= +10 V; T
A
= full operating temperature. All specifications
–40 ° C to +125 ° C, unless otherwise noted.
DAC7811
PARAMETER CONDITIONS MIN TYP MAX UNITS
REFERENCE INPUT
V
REF
range –15 15 V
Input resistance 8 10 12 k Ω
R
FB
resistance 8 10 12 k Ω
LOGIC INPUTS AND OUTPUT
(2)
Input low voltage V
IL
V
DD
= +2.7V 0.6 V
V
IL
V
DD
= +5V 0.8 V
Input high voltage V
IH
V
DD
= +2.7V 2.1 V
V
IH
V
DD
= +5V 2.4 V
Input leakage current I
IL
10 µA
Input capacitance C
IL
10 pF
INTERFACE TIMING (see Figure 28 )
Clock input frequency f
CLK
50 MHz
Clock period t
C
20 ns
Clock pulse width high t
CH
8 ns
Clock pulse width low t
CC
8 ns
SYNC falling edge to SCLK
t
CSS
13 ns
active edge setup time
SCLK active edge to SYNC
t
CST
5 ns
rising edge hold time
Data setup time t
DS
5 ns
Data hold time t
DH
3 ns
SYNC high time t
SH
30 ns
V
DD
= +2.7V 25 35 ns
SYNC inactive edge to SDO
t
DDS
valid
V
DD
= +5V 20 30 ns
POWER REQUIREMENTS
V
DD
2.7 5.5 V
I
DD
(normal operation) Logic inputs = 0V 5 µA
V
DD
= +4.5 V to +5.5 V V
IH
= V
DD
and V
IL
= GND 0.8 5 µA
V
DD
= +2.7 V to +3.6 V V
IH
= V
DD
and V
IL
= GND 0.4 2.5 µA
AC CHARACTERISTICS
(2)
Output voltage settling time 0.2 µs
Reference multiplying BW V
REF
= 7 V
PP
, Data = FFFh 10 MHz
V
REF
= 0 V to 10 V,
DAC glitch impulse 5 nV-s
Data = 7FFh to 800h to 7FFh
Feedthrough error V
OUT
/V
REF
Data = 000h, V
REF
= 100kHz –60 dB
Digital feedthrough 2 nV-s
Total harmonic distortion –105 dB
Output spot noise voltage 18 nV/ √ Hz
(2) Specified by design and characterization; not production tested.
3
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