Datasheet

4
LTC1650
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. AV
DD
= 4.75V to 5.25V, AV
SS
= –4.75V to –5.25V, DV
DD
= 4.75V to
5.25V, REFLO = 0V, REFHI = 4.096V, V
OUT
unloaded, unless otherwise noted.
Note 5: Digital Inputs at 0V or DV
DD
.
Note 6: Measured at V
OUT
. REFHI = REFLO = 0V, unipolar mode.
Note 7: When part powers up or when it is reset, the output is connected
to V
RST
through this switch.
Note 8: Reset is active when any supply goes below this threshold.
Note 9: REFLO = 0V, REFHI = V
REF
. For REFLO ≠ 0V see Operation section.
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Nonlinearity is defined from code 0 to code 65535 (full scale)
(end point INL, see Definitions section).
Note 3: Guaranteed by design. Not subject to test.
Note 4: To ±1LSB. Unipolar mode. DAC switched between all 1s and all 0s.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
Digital I/O Characteristics
V
IH
Digital Input High Voltage ● 2.4 V
V
IL
Digital Input Low Voltage ● 0.8 V
V
OH
Digital Output High Voltage I
OUT
= –1mA, D
OUT
Only ● V
CC
– 1.0 V
V
OL
Digital Output Low Voltage I
OUT
= 1mA, D
OUT
Only ● 0.4 V
I
LK
Digital Input Leakage V
IN
= GND to V
CC
● ±10 µA
C
IN
Digital Input Capacitance (Note 3) 10 pF
Reset Characteristics
R
ON
V
OUT
and V
RST
Switch Resistance V
RST
= 0.5V (Note 7) ● 200 500 Ω
Threshold Voltage for Reset AV
DD
or DV
DD
(Note 8) ● 1.5 2.5 3.2 V
AV
SS
(Note 8) ● 1.5 2.5 3.2 V
Switching Characteristics
t
1
D
IN
Valid to CLK Setup ● 40 ns
t
2
D
IN
Valid to CLK Hold ● 0ns
t
3
CLK High Time (Note 3) ● 40 ns
t
4
CLK Low Time (Note 3) ● 40 ns
t
5
CS/LD Pulse Width (Note 3) ● 50 ns
t
6
LSB CLK to CS/LD (Note 3) ● 40 ns
t
7
CS/LD Low to CLK (Note 3) ● 20 ns
t
8
D
OUT
Output Delay C
LOAD
= 100pF ● 5 45 150 ns
t
9
CLK Low to CS/LD Low (Note 3) ● 20 ns
t
10
CLR Pulse Width ● 50 ns
ELECTRICAL CHARACTERISTICS