Datasheet
LTC2640
7
2640fc
For more information www.linear.com/LTC2640
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
= 2.7V to 5.5V. (See Figure 1) (Note 8).
LTC2640-LM12/-LM10/-LM8/-LZ12/-LZ10/-LZ8, LTC2640A-LM12/-LZ12 (V
FS
= 2.5V)
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
LSB SCK High to CS/LD High
l
7 ns
t
7
CS/LD Low to SCK High
l
7 ns
t
9
CLR Pulse Width
l
20 ns
t
10
CS/LD High to SCK Pos. Edge
l
7 ns
SCK Frequency 50% Duty Cycle
l
50 MHz
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.
LTC2640-HM12/-HM10/-HM8/-HZ12/-HZ10/-HZ8, LTC2640A-HM12/-HZ12 (V
FS
= 4.096V)
LTC2640-8 LTC2640-10 LTC2640-12 LTC2640A-12
SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
DC Performance
Resolution
l
8 10 12 12 Bits
Monotonicity V
CC
= 5V, Internal Ref. (Note 4)
l
8 10 12 12 Bits
DNL Differential
Nonlinearity
V
CC
= 5V, Internal Ref. (Note 4)
l
±0.5 ±0.5 ±1 ±1 LSB
INL Integral
Nonlinearity
V
CC
= 5V, Internal Ref. (Note 4)
l
±0.05 ±0.5 ±0.2 ±1 ±1 ±2.5 ±0.5 ±1 LSB
ZSE Zero-Scale Error V
CC
= 5V, Internal Ref.,
Code = 0
l
0.5 5 0.5 5 0.5 5 0.5 5 mV
V
OS
Offset Error V
CC
= 5V, Internal Ref. (Note 5)
l
±0.5 ±5 ±0.5 ±5 ±0.5 ±5 ±0.5 ±5 mV
V
OSTC
V
OS
Temperature
Coefficient
V
CC
= 5V, Internal Ref. (Note 5) ±10 ±10 ±10 ±10 µV/°C
FSE Full-Scale Error V
CC
= 5V, Internal Ref. (Note 11)
l
±0.08 ±0.4 ±0.08 ±0.4 ±0.08 ±0.4 ±0.08 ±0.4 %FSR
V
FSTC
Full-Scale Voltage
Temperature
Coefficient
V
CC
= 5V, Internal Ref. (Note 10)
C-Grade
I-Grade
H-Grade
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
ppm/°C
ppm/°C
ppm/°C
Load Regulation V
CC
= 5V ±10%,
Internal Ref. Mid-Scale,
–10mA ≤ I
OUT
≤ 10mA
l
0.006 0.01 0.022 0.04 0.09 0.16 0.09 0.16 LSB/mA
R
OUT
DC Output
Impedance
V
CC
= 5V ±10%,
Internal Ref. Mid-Scale,
–10mA ≤ I
OUT
≤ 10mA
l
0.09 0.156 0.09 0.156 0.09 0.156 0.09 0.156 Ω