Datasheet
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PIN ASSIGNMENTS
REF
R
COM
R1
R
OFS
R
FB
I
OUT
AGND
LDAC
WR
D13
D12
D11
D10
D9
RST
NC
NC
D0
D1
V
DD
DGND
D2
D3
D4
D5
D6
D7
D8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
DAC8806
DAC8806
SBAS385B – APRIL 2006 – REVISED FEBRUARY 2008
ELECTRICAL CHARACTERISTICS (continued)
All specifications at – 40 ° C to +85 ° C, V
DD
= +2.7 V to +5.5 V, I
OUT
= virtual GND, GND = 0 V, V
REF
= 10 V, and T
A
= full
operating temperature, unless otherwise noted.
DAC8806
PARAMETER CONDITIONS MIN TYP MAX UNITS
POWER REQUIREMENTS
V
DD
2.7 5.5 V
I
DD
(normal operation) Logic inputs = 0V 5 µ A
V
DD
= +4.5 V to +5.5 V V
IH
= V
DD
and V
IL
= GND 3 5 µ A
V
DD
= +2.7 V to +3.6 V V
IH
= V
DD
and V
IL
= GND 1 2.5 µ A
AC CHARACTERISTICS
(2)
Output current settling time 0.5 µ s
Reference multiplying BW V
REF
= 5 V
PP
, Data = 3FFFh 8 MHz
V
REF
= 0 V to 10 V,
DAC glitch impulse 2 nV – s
Data = 1FFFh to 2000h to 1FFFh
Feedthrough error V
OUT
/V
REF
Data = 0000h, V
REF
= 10 kHz; ± 10 V
PP
– 70 dB
L
DAC
= logic low, V
REF
= – 10 V to +10 V
Digital feedthrough 2 nV – s
Any code change
Total harmonic distortion V
REF
= 6 V
RMS
, Data = 3FFF, f = 1 kHz – 105 dB
Output spot noise voltage 10 nV/ √ Hz
(2) Specified by design and characterization; not production tested.
TERMINAL FUNCTIONS
PIN # NAME DESCRIPTION
1 REF Reference input and 4-quadrant Resistor (R2).
Center tap of two 4-quadrant resistors
2 R
COM
(R1 and R2).
3 R1 4-quadrant resistor (R1).
4 R
OFS
Bipolar offset resistor
5 R
FB
Internal matching feedback resistor
6 I
OUT
DAC current output
7 AGND Analog ground
Digital input load DAC control. When LDAC is high,
8 LDAC data is loaded from input register into a DAC
register, updating the DAC output.
Write control digital input. Active low. When WR is
9 WR taken to logic low, data is loaded from the digital
input pins (D0 – D13) into a14-bit input register.
10 – 21 D13 – D2 Digital input data bits. D13 is MSB.
22 DGND Digital ground
23 V
DD
Positive power supply
24, 25 D1, D0 Digital Input data bits. D0 is LSB.
26, 27 NC No connection
Reset. Active low. When RST is taken to logic low,
28 RST the DAC register is set to zero code, resulting in the
DAC output being set to 0 V.
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