Datasheet

LTC2637
5
2637fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
CC
= 2.7V to 5.5V, V
OUT
unloaded unless otherwise specifi ed.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
OUT
DAC Output Span External Reference
Internal Reference
0 to V
REF
0 to 2.5
V
V
PSR Power Supply Rejection V
CC
= 3V±10% or 5V±10% –80 dB
I
SC
Short Circuit Output Current (Note 6)
Sinking
Sourcing
V
FS
= V
CC
= 5.5V
Zero-Scale; V
OUT
shorted to V
CC
Full-Scale; V
OUT
shorted to GND
l
l
27
–28
48
–48
mA
mA
Power Supply
V
CC
Positive Supply Voltage For Specifi ed Performance
l
2.7 5.5 V
I
CC
Supply Current (Note 7) V
CC
= 3V, V
REF
=2.5V, External Reference
V
CC
= 3V, Internal Reference
V
CC
= 5V, V
REF
=2.5V, External Reference
V
CC
= 5V, Internal Reference
l
l
l
l
0.8
0.9
0.9
1
1.1
1.3
1.3
1.5
mA
mA
mA
mA
I
SD
Supply Current in Power-Down Mode
(Note 7)
V
CC
= 5V, C-Grade, I-Grade
V
CC
= 5V, H-Grade
l
l
1
1
20
30
µA
µA
LTC2637-LMI12/ LTC2637-LMI10/ LTC2637-LMI8/ LTC2637-LMX12/ LTC2637-LMX10/ LTC2637-LMX8/ LTC2637-LZ12/
LTC2637-LZ10/ LTC2637-LZ8 (V
FS
= 2.5V)
SYMBOL PARAMETER CONDITIONS
LTC2637-8 LTC2637-10 LTC2637-12
UNITSMIN TYP MAX MIN TYP MAX MIN TYP MAX
Resolution
l
8 10 12 Bits
Monotonicity V
CC
= 3V, Internal Reference (Note 4)
l
8 10 12 Bits
DNL Differential Nonlinearity V
CC
= 3V, Internal Reference (Note 4)
l
±0.5 ±0.5 ±1 LSB
INL Integral Nonlinearity V
CC
= 3V, Internal Reference (Note 4)
l
±0.05 ±0.5 ±0.2 ±1 ±1 ±2.5 LSB
ZSE Zero-Scale Error V
CC
= 3V, Internal Reference, Code = 0
l
0.5 5 0.5 5 0.5 5 mV
V
OS
Offset Error V
CC
= 3V, Internal Reference (Note 5)
l
±0.5 ±5 ±0.5 ±5 ±0.5 ±5 mV
V
OSTC
V
OS
Temperature
Coeffi cient
V
CC
=3V, Internal Reference ±10 ±10 ±10 µV/°C
GE Gain Error V
CC
= 3V, Internal Reference
l
±0.2 ±0.8 ±0.2 ±0.8 ±0.2 ±0.8 %FSR
GE
TC
Gain Temperature
Coeffi cient
V
CC
= 3V, Internal Reference (Note 10)
C-Grade
I-Grade
H-Grade
10
10
10
10
10
10
10
10
10
ppm/°C
ppm/°C
ppm/°C
Load Regulation Internal Reference, Mid-Scale,
V
CC
= 3V±10%,
–5mA ≤ I
OUT
≤ 5mA
V
CC
= 5V±10%, (Note 15)
–10mA ≤ I
OUT
≤ 10mA
l
l
0.009
0.009
0.016
0.016
0.035
0.035
0.064
0.064
0.14
0.14
0.256
0.256
LSB/mA
LSB/mA
R
OUT
DC Output Impedance Internal Reference, Mid-Scale,
V
CC
= 3V±10%,
–5mA ≤ I
OUT
≤ 5mA
V
CC
= 5V±10%, (Note 15)
–10mA ≤ I
OUT
≤ 10mA
l
l
0.09
0.09
0.156
0.156
0.09
0.09
0.156
0.156
0.09
0.09
0.156
0.156
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