LTC2630
7
2630ff
electrical characteristics
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 4.5V to 5.5V, V
OUT
unloaded unless otherwise specified.
LTC2630-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2630A-HM12/-HZ12 (V
FS
= 4.096V)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
AC Performance
t
S
Settling Time V
CC
= 5V (Note 9)
±0.39% (±1LSB at 8 Bits)
±0.098% (±1LSB at 10 Bits)
±0.024% (±1LSB at 12 Bits)
3.7
4.4
4.8
µs
µs
µs
Voltage Output Slew Rate 1.0 V/µs
Capacitive Load Driving 500 pF
Glitch Impulse At Mid-Scale Transition 2.4 nV•s
e
n
Output Voltage Noise Density At f = 1kHz, Supply as Reference
At f = 10kHz, Supply as Reference
At f = 1kHz, Internal Reference
At f = 10kHz, Internal Reference
140
130
210
200
nV/√Hz
nV/√Hz
nV/√Hz
nV/√Hz
Output Voltage Noise 0.1Hz to 10Hz, Supply as Reference
0.1Hz to 10Hz, Internal Reference
0.1Hz to 200kHz, Supply as Reference
0.1Hz to 200kHz, Internal Reference
20
20
650
750
µV
P-P
µV
P-P
µV
P-P
µV
P-P
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All voltages are with respect to GND.
Note 3: High temperatures degrade operating lifetimes. Operating lifetime
is derated at temperatures greater than 105°C.
Note 4: Linearity and monotonicity are defined from code k
L
to code 2
N
–1,
where N is the resolution and k
L
is given by k
L
= 0.016 • (2
N
/ V
FS
), rounded
to the nearest whole code. For V
FS
= 2.5V and N = 12, k
L
= 26 and linearity
is defined from code 26 to code 4,095. For V
FS
= 4.096V and
N = 12, k
L
= 16 and linearity is defined from code 16 to code 4,095.
Note 5: Inferred from measurement at code 16 (LTC2630-12), code 4
(LTC2630-10) or code 1 (LTC2630-8).
Note 6: This IC includes current limiting that is intended to protect the
device during momentary overload conditions. Junction temperature can
exceed the rated maximum during current limiting. Continuous operation
above the specified maximum operating junction temperature may impair
device reliability.
Note 7: Digital inputs at 0V or V
CC
.
Note 8: Guaranteed by design and not production tested.
Note 9: Internal Reference mode. DAC is stepped 1/4 scale to 3/4 scale
and 3/4 scale to 1/4 scale. Load is 2kW in parallel with 100pF to GND.
Note 10: Temperature coefficient is calculated by dividing the maximum
change in output voltage by the specified temperature range.
timing characteristics
The l denotes the specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. V
CC
= 4.5V to 5.5V. (See Figure 1) (Note 8).
LTC2630-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2630A-HM12/-HZ12 (V
FS
= 4.096V)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
1
SDI Valid to SCK Setup
l
4 ns
t
2
SDI Valid to SCK Hold
l
4 ns
t
3
SCK High Time
l
9 ns
t
4
SCK Low Time
l
9 ns
t
5
CS/LD Pulse width
l
10 ns
t
6
SCK High to CS/LD High
l
7 ns
t
7
CS/LD Low to SCK High
l
7 ns
t
10
CS/LD High to SCK Positive Edge
l
7 ns
SCK Frequency 50% Duty Cycle
l
50 MHz
