DAC8806_15 Datasheet, PDF (4/22 Pages) Texas Instruments – 14-Bit, Parallel Input Multiplying Digital-to-Analog Converternull

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