Datasheet

4
LTC2601/LTC2611/LTC2621
2601fa
TI I G CHARACTERISTICS
UW
The ● denotes specifications which apply over the full operating temperature
range, otherwise specifications are at T
A
= 25°C. (See Figure 1) (Notes 4, 8)
Note 1: Absolute maximum ratings are those values beyond which the life
of a device may be impaired.
Note 2: 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
REF
),
rounded to the nearest whole code. For V
REF
= 4.096V and N = 16, k
L
=
256 and linearity is defined from code 256 to code 65,535.
Note 3: Digital inputs at 0V or V
CC
.
Note 4: Guaranteed by design and not production tested.
Note 5: Inferred from measurement at code K
L
= 0.016(2
N
/V
REF
) and at
full scale.
Note 6: V
CC
= 5V, V
REF
= 4.096V. DAC is stepped 1/4 scale to 3/4 scale
and 3/4 scale to 1/4 scale. Load is 2k in parallel with 200pF to GND.
Note 7: V
CC
= 5V, V
REF
= 4.096V. DAC is stepped ±1LSB between half
scale and half scale – 1. Load is 2k in parallel with 200pF to GND.
Note 8: These specifications apply to LTC2601/LTC2601-1,
LTC2611/LTC2611-1, LTC2621/LTC2621-1
E
LECTR
IC
AL C CHARA TERIST
ICS
The ● denotes specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. REF = 4.096V (V
CC
= 5V), REF = 2.048V (V
CC
= 2.5V), V
OUT
unloaded,
unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
AC Performance
t
S
Settling Time (Note 6) ±0.024% (±1LSB at 12 Bits) 7 7 7 µs
±0.006% (±1LSB at 14 Bits) 9 9 µs
±0.0015% (±1LSB at 16 Bits) 10 µs
Settling Time for 1LSB Step ±0.024% (±1LSB at 12 Bits) 2.7 2.7 2.7 µs
(Note 7) ±0.006% (±1LSB at 14 Bits) 4.8 4.8 µs
±0.0015% (±1LSB at 16 Bits) 5.2 µs
Voltage Output Slew Rate 0.80 0.80 0.80 V/µs
Capacitive Load Driving 1000 1000 1000 pF
Glitch Impulse At Midscale Transition 12 12 12 nV • s
Multiplying Bandwidth 180 180 180 kHz
e
n
Output Voltage Noise Density At f = 1kHz 120 120 120 nV/√Hz
At f = 10kHz 100 100 100 nV/√Hz
Output Voltage Noise 0.1Hz to 10Hz 15 15 15 µV
P-P
LTC2621/LTC2621-1 LTC2611/LTC2611-1 LTC2601/LTC2601-1
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
= 2.5V to 5.5V
t
1
SDI Valid to SCK Setup ● 4ns
t
2
SDI Valid to SCK Hold ● 4ns
t
3
SCK High Time ● 9ns
t
4
SCK Low Time ● 9ns
t
5
CS/LD Pulse Width ● 10 ns
t
6
LSB SCK High to CS/LD High ● 7ns
t
7
CS/LD Low to SCK High ● 7ns
t
8
SDO Propagation Delay from SCK Falling Edge C
LOAD
= 10pF
V
CC
= 4.5V to 5.5V ● 20 ns
V
CC
= 2.5V to 5.5V ● 45 ns
t
9
CLR Pulse Width ● 20 ns
t
10
CS/LD High to SCK Positive Edge ● 7ns
t
12
LDAC Pulse Width ● 15 ns
t
13
CS/LD High to LDAC High or Low Transition ● 200 ns
SCK Frequency 50% Duty Cycle ● 50 MHz