Datasheet

DAC8550
www.ti.com SLAS476E –MARCH 2006–REVISED MARCH 2012
ELECTRICAL CHARACTERISTICS (continued)
V
DD
= 2.7V to 5.5V, –40°C to +105°C range (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
OUTPUT CHARACTERISTICS
(2)
V
O
Output voltage range 0 V
REF
V
To ±0.003% FSR, 1200h to 8D00h, R
L
= 2kΩ, 0pF < C
L
< 200pF 8 10 μs
t
SD
Output voltage settling time
R
L
= 2kΩ, C
L
= 500pF 12 μs
SR Slew rate 1.8 V/μs
R
L
= ∞ 470 pF
Capacitive load stability
R
L
= 2kΩ 1000 pF
Code change glitch impulse 1LSB change around major carry 0.1
nV-s
Digital feedthrough SCLK toggling, FSYNC high 0.1
z
O
DC output impedance At mid-code input 1 Ω
V
DD
= 5V 50
I
OS
Short-circuit current mA
V
DD
= 3V 20
Coming out of power-down mode, V
DD
= 5V 2.5
t
ON
Power-up time μs
Coming out of power-down mode, V
DD
= 3V 5
AC PERFORMANCE
SNR Signal-to-noise ratio 95
THD Total harmonic distortion –85
BW = 20kHz, V
DD
= 5V, f
OUT
= 1kHz,
dB
1st 19 harmonics removed for SNR calculation
SFDR Spurious-free dynamic range 87
SINAD Signal-to-noise and distortion 84
REFERENCE INPUT
V
REF
Reference voltage 0 V
DD
V
V
REF
= V
DD
= 5V 40 75 μA
I
I(REF)
Reference current input range
V
REF
= V
DD
= 3.6V 30 45 μA
z
I(REF)
Reference input impedance 125 kΩ
LOGIC INPUTS
(3)
Input current ±1 μA
V
DD
= 5V 0.3V
DD
V
IL
Low-level input voltage V
V
DD
= 3V 0.1V
DD
V
DD
= 5V 0.7V
DD
V
IH
High-level input voltage V
V
DD
= 3V 0.9V
DD
Pin capacitance 3 pF
POWER REQUIREMENTS
V
DD
2.7 5.5 V
I
DD
(normal mode) Input code equals mid-scale, no load, does not include reference
current
V
DD
= 3.6V to 5.5V 160 250
V
IH
= V
DD
and V
IL
= GND μA
V
DD
= 2.7V to 3.6V 140 240
I
DD
(all power-down modes)
V
DD
= 3.6V to 5.5V V
IH
= V
DD
and V
IL
= GND 0.2 2
μA
V
DD
= 2.7V to 3.6V 0.05 2
POWER EFFICIENCY
I
OUT
/I
DD
I
LOAD
= 2mA, V
DD
= 5V 89 %
TEMPERATURE RANGE
Specified performance –40 +105 °C
(2) Specified by design and characterization, not production tested.
(3) Specified by design and characterization, not production tested.
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