Datasheet
ADS8320
2
SBAS108D
www.ti.com
SPECIFICATIONS: +V
CC
= +5V
At –40°C to +85°C, V
REF
= +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 +1.0 ✻✻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 %
Gain Temperature Drift ±0.3 ✻ ppm/°C
Noise 20 ✻ µVrms
Power-Supply Rejection Ratio +4.7V < V
CC
< 5.25V 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
= 5V
PP
at 10kHz –84 –86 dB
SINAD V
IN
= 5V
PP
at 10kHz 82 84 dB
Spurious-Free Dynamic Range V
IN
= 5V
PP
at 10kHz 84 86 dB
SNR 90 92 dB
REFERENCE INPUT
Voltage Range 0.5 V
CC
✻✻V
Resistance
CS = GND, f
SAMPLE
= 0Hz
5 ✻ GΩ
CS = V
CC
5 ✻ GΩ
Current Drain 40 80 ✻✻µA
f
SAMPLE
= 10kHz 0.8 ✻ µA
CS = V
CC
0.1
3
✻ µA
DIGITAL INPUT/OUTPUT
Logic Family CMOS ✻
Logic Levels:
V
IH
I
IH
= +5µA 3.0
V
CC
+ 0.3
✻✻V
V
IL
I
IL
= +5µA –0.3 0.8 ✻✻V
V
OH
I
OH
= –250µA 4.0 ✻ 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
V
CC
Range
(2)
2.0 5.25 ✻✻V
Quiescent Current 900 1700 ✻✻µA
f
SAMPLE
= 10kHz
(3, 4)
200 ✻ µA
Power Dissipation 4.5 8.5 ✻✻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 +5.0V, one LSB is 0.076mV.
(2) See
Typical Performance Curves
for more information.
(3) f
CLK
= 2.4MHz, CS = V
CC
for 216 clock cycles out of every 240.
(4) See the Power Dissipation section for more information regarding lower sample rates.