Datasheet

ADS8320
3
SBAS108D
www.ti.com
SPECIFICATIONS: +V
CC
= +2.7V
At 40°C to +85°C, V
REF
= 2.5V, IN = GND, f
SAMPLE
= 100kHz, and f
CLK
= 24 f
SAMPLE
, unless otherwise specified.
ADS8320E ADS8320EB
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
RESOLUTION 16 Bits
ANALOG INPUT
Full-Scale Input Span +In (In) 0 V
REF
✻✻V
Absolute Input Range +In 0.1
V
CC
+ 0.1
✻✻V
In 0.1 +0.5 ✻✻V
Capacitance 45 pF
Leakage Current 1 nA
SYSTEM PERFORMANCE
No Missing Codes 14 15 Bits
Integral Linearity Error ±0.008 ±0.018 ±0.006 ±0.012
% of FSR
Offset Error ±1 ±2 ±0.5 ±1mV
Offset Temperature Drift ±3 µV/°C
Gain Error ±0.05 ±0.024 % of FSR
Gain Temperature Drift ±0.3 ppm/°C
Noise 20 µVrms
Power-Supply Rejection Ratio +2.7V < V
CC
< +3.3V 3 LSB
(1)
SAMPLING DYNAMICS
Conversion Time 16
Clk Cycles
Acquisition Time 4.5
Clk Cycles
Throughput Rate 100 kHz
Clock Frequency Range 0.024 2.4 ✻✻MHz
DYNAMIC CHARACTERISTICS
Total Harmonic Distortion V
IN
= 2.7Vp-p at 1kHz 86 88 dB
SINAD V
IN
= 2.7Vp-p at 1kHz 84 86 dB
Spurious-Free Dynamic Range V
IN
= 2.7Vp-p at 1kHz 86 88 dB
SNR 88 90 dB
REFERENCE INPUT
Voltage Range 0.5 V
CC
✻✻V
Resistance
CS = GND, f
SAMPLE
= 0Hz
5 G
CS = V
CC
5 G
Current Drain 20 50 ✻✻µA
CS = V
CC
0.1
3
✻✻µA
DIGITAL INPUT/OUTPUT
Logic Family CMOS
Logic Levels:
V
IH
I
IH
= +5µA 2.0
V
CC
+ 0.3
✻✻V
V
IL
I
IL
= +5µA 0.3 0.8 ✻✻V
V
OH
I
OH
= 250µA 2.1 V
V
OL
I
OL
= 250µA 0.4 V
Data Format Straight Binary
POWER-SUPPLY REQUIREMENTS
V
CC
Specified Performance 2.7 3.3 ✻✻V
V
CC
Range
(3)
2.0 5.25 ✻✻V
See Note 2 2.0 2.7 ✻✻V
Quiescent Current 650 1300 ✻✻µA
f
SAMPLE
= 10kHz
(4,5)
100 µA
Power Dissipation 1.8 3.8 ✻✻mW
Power-Down CS = V
CC
0.3 3 ✻✻µA
TEMPERATURE RANGE
Specified Performance 40 +85 ✻✻°C
Specifications same as ADS8320E.
NOTES: (1) LSB means Least Significant Bit. With V
REF
equal to +2.5V, one LSB is 0.038mV.
(2) The maximum clock rate of the ADS8320 is less than 2.4MHz in this power supply range.
(3) See the
Typical Performance Curves
for more information.
(4) f
CLK
= 2.4MHz, CS = V
CC
for 216 clock cycles out of every 240.
(5) See the Power Dissipation section for more information regarding lower sample rates.