Datasheet

3
LTC1285/LTC1288
LTC1285 LTC1288
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes) ● 12 12 Bits
Integral Linearity Error (Note 6) ● ±3/4 ±2 ±3/4 ±2 LSB
Differential Linearity Error ● ±1/4 ±3/4 ±1/4 ±3/4 LSB
Offset Error ● ±3/4 ±3 ±3/4 ±3 LSB
Gain Error ● ±2 ±8 ±2 ±8 LSB
Analog Input Range (Note 7 and 8) ● V
REF Input Range (LTC1285) 2.7 ≤ V
CC
≤ 6V V
(Notes 7, 8, and 9) V
Analog Input Leakage Current (Note 10) ● ±1 ±1 µA
1.5V to V
CC
+ 0.05V
–0.05V to V
CC
+ 0.05V
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
S/(N +D) Signal-to-Noise Plus Distortion Ratio 1kHz Input Signal 67 dB
THD Total Harmonic Distortion (Up to 5th Harmonic) 1kHz Input Signal –80 dB
SFDR Spurious-Free Dynamic Range 1kHz Input Signal 88 dB
Peak Harmonic or Spurious Noise 1kHz Input Signal –88 dB
DYNAMIC ACCURACY
UW
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IH
High Level Input Voltage V
CC
= 3.6V ● 2V
V
IL
Low Level Input Voltage V
CC
= 2.7V ● 0.8 V
I
IH
High Level Input Current V
IN
= V
CC
● 2.5 µA
I
IL
Low Level Input Current V
IN
= 0V ● –2.5 µA
V
OH
High Level Output Voltage V
CC
= 2.7V, I
O
= 10µA ● 2.4 2.64 V
V
CC
= 2.7V, I
O
= 360µA ● 2.1 2.30 V
V
OL
Low Level Output Voltage V
CC
= 2.7V, I
O
= 400µA ● 0.4 V
I
OZ
Hi-Z Output Leakage CS = High ● ±3 µA
I
SOURCE
Output Source Current V
OUT
= 0V –10 mA
I
SINK
Output Sink Current V
OUT
= V
CC
15 mA
R
REF
Reference Input Resistance CS = V
IH
2700 MΩ
(LTC1285) CS = V
IL
54 kΩ
I
REF
Reference Current (LTC1285) CS = V
CC
● 0.001 2.5 µA
t
CYC
≥ 640µs, f
CLK
≤ 25kHz 50 µA
t
CYC
= 134µs, f
CLK
= 120kHz ● 50 70 µA
I
CC
Supply Current CS = V
CC
● 0.001 ±3.0 µA
LTC1285, t
CYC
≥ 640µs, f
CLK
≤ 25kHz 150 µA
LTC1285, t
CYC
= 134µs, f
CLK
= 120kHz ● 160 320 µA
LTC1288, t
CYC
≥ 720µs, f
CLK
≤ 25kHz 200 µA
LTC1288, t
CYC
= 150µs, f
CLK
= 120kHz ● 210 390 µA
DIGITAL AND DC ELECTRICAL CHARACTERISTICS
U
CONVERTER AND MULTIPLEXER CHARACTERISTICS
UW U
(Note 5)
(Note 5)
f
SMPL
= 7.5kHz (LTC1285), f
SMPL
= 6.6kHz (LTC1288) (Note 5)