LTC1450_15 Datasheet, PDF (4/16 Pages) Linear Technology – Parallel Input, 12-Bit Rail-to-Rail Micropower DACs in SSOP

LTC1450/LTC1450L
ELECTRICAL CHARACTERISTICS
V_CC = 4.5V to 5.5V (LTC1450), V_CC = 2.7V to 3.6V (LTC1450L), T_A = T_MIN to T_MAX, unless otherwise noted.
SYMBOL PARAMETER
Switching Characteristics (Note 5)
t_CS
CS (MSB or LSB) Pulse Width
t_WR
WR Pulse Width
t_CWS CS to WR Setup
t_CWH CS to WR Hold
t_DWS Data Valid to WR Setup
t_DWH Data Valid to WR Hold
t_LDAC
t_CLR
LDAC Pulse Width
CLR Pulse Width
CONDITIONS
V_CC = 4.5V to 5.5V (LTC1450)
V_CC = 2.7V to 3.6V (LTC1450L)
V_CC = 5V (LTC1450L)
V_CC = 4.5V to 5.5V (LTC1450)
V_CC = 2.7V to 3.6V (LTC1450L)
V_CC = 5V (LTC1450L)
MIN TYP MAX UNITS
q 40
ns
q 40
ns
q0
ns
q0
ns
q 40
15
ns
q 40
15
ns
10
ns
q0
– 10
ns
q0
– 10
ns
–5
ns
q 40
ns
q 40
ns
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Nonlinearity is defined from the first code that is greater than or
equal to the maximum offset specification to code 4095 (full-scale).
Note 2: Load is 5kΩ in parallel with 100pF.
Note 3: DAC switched all 1’s and the code corresponding to V_OS(MAX) for
the part.
Note 4: Digital inputs at 0V or V_CC.
Note 5: Digital inputs swing 10% to 90% of V_CC, t_r = t_f = 5ns and timing
measurements are from V_CC/2.
TYPICAL PERFORMANCE CHARACTERISTICS
Minimum Supply Voltage
vs Load Current
5.8
4.2
∆V_OUT < 1LSB
5.6
LTC1450
4.0
LTC1450L
5.4
3.8
5.2
3.6
5.0
3.4
4.8
3.2
4.6
3.0
4.4
2.8
4.2
2.6
4.0
0.01
0.1
1
10
LOAD CURRENT (mA)
2.4
100
1450/50L G01
LTC1450 Supply Current
vs Temperature
450
440
430
420
V_CC = 5.5V
410
V_CC = 5V
400
V_CC = 4.5V
390
380
370
360
350
– 55 – 35 –15 5 25 45 65 85 105 125
TEMPERATURE (°C)
1450/50L G02
Supply Current
vs Logic Input Voltage
8
V_CC = 5V
7
ALL LOGIC INPUTS
TIED TOGETHER
6
LTC1450
5
4
LTC1450L
3
2
1
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
LOGIC INPUT VOLTAGE (V)
1450/50L G03
4