Datasheet

ADS8344
3
SBAS139E
ELECTRICAL CHARACTERISTICS: +5V
At T
A
= 40°C to +85°C, +V
CC
= +5V, V
REF
= +5V, f
SAMPLE
= 100kHz, and f
CLK
= 24 f
SAMPLE
= 2.4MHz, unless otherwise noted.
ADS8344E, N ADS8344EB, NB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 16 BITS
ANALOG INPUT
Full-Scale Input Span Positive Input - Negative Input 0 V
REF
✻✻V
Absolute Input Range Positive Input 0.2
+V
CC
+ 0.2
✻✻V
Negative Input 0.2 +1.25 ✻✻V
Capacitance 25 pF
Leakage Current ±1 µA
SYSTEM PERFORMANCE
No Missing Codes 14 15 Bits
Integral Linearity Error 86LSB
Offset Error ±2 ±1mV
Offset Error Match 1.2 4 ✻✻LSB
(1)
Gain Error ±0.05 ±0.024 %
Gain Error Match 1.0 4 ✻✻ LSB
Noise 20 µVrms
Power-Supply Rejection +4.75V < V
CC
< 5.25V 3 LSB
(1)
SAMPLING DYNAMICS
Conversion Time 16 CLK Cycles
Acquisition Time 4.5 CLK Cycles
Throughput Rate 100 kHz
Multiplexer Settling Time 500 ns
Aperture Delay 30 ns
Aperture Jitter 100 ps
Internal Clock Frequency SHDN = V
DD
2.4 MHz
External Clock Frequency 0.024 2.4 ✻✻MHz
Data Transfer Only 0 2.4 ✻✻MHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion
(2)
V
IN
= 5Vp-p at 10kHz 90 dB
Signal-to-(Noise + Distortion) V
IN
= 5Vp-p at 10kHz 86 dB
SpuriousFree Dynamic Range V
IN
= 5Vp-p at 10kHz 92 dB
Channel-to-Channel Isolation V
IN
= 5Vp-p at 10kHz 100 dB
REFERENCE INPUT
Range 0.5 +V
CC
✻✻V
Resistance DCLK Static 5 G
Input Current 40 100 ✻✻ µA
f
SAMPLE
= 12.5kHz 2.5 µA
DCLK Static 0.001 3 ✻✻ µA
DIGITAL INPUT/OUTPUT
Logic Family CMOS
Logic Levels
V
IH
| I
IH
| +5µA 3.0 5.5 ✻✻V
V
IL
| I
IL
| +5µA 0.3 +0.8 ✻✻V
V
OH
I
OH
= 250µA 3.5 V
V
OL
I
OL
= 250µA 0.4 V
Data Format Straight Binary
POWER-SUPPLY REQUIREMENTS
+V
CC
Specified Performance 4.75 5.25 ✻✻V
Quiescent Current 1.5 2.0 mA
f
SAMPLE
= 100kHz 300 µA
Power-Down Mode
(3)
, CS = +V
CC
3 µA
Power Dissipation 7.5 10 mW
TEMPERATURE RANGE
Specified Performance 40 +85 ✻✻°C
Same specifications as ADS8344E, N.
NOTES: (1) LSB means Least Significant Bit. With V
REF
equal to +5.0V, one LSB is 76µV. (2) First nine harmonics of the test frequency. (3) Auto power-down mode
(PD1 = PD0 = 0) active or SHDN = GND.