Datasheet

ADS1202
3
SBAS275B
www.ti.com
ELECTRICAL CHARACTERISTICS
Over recommended operating free-air temperature range at –40°C to +85°C, V
DD
= 5V, +In = –250mV to 250mV, –In = 0V, and MCLK = 10MHz, unless otherwise noted.
ADS1202IPW
PARAMETER CONDITIONS MIN TYP
(1)
MAX UNITS
RESOLUTION 16 Bits
DC ACCURACY
Integral Nonlinearity
(2)
INL ±3 ±12 LSB
0.005 0.018 %
Differential Linearity
(3)
DNL ±1 LSB
Input Offset
(4)
V
OS
±300 ±1000 µV
Input Offset Drift TCV
OS
28µV/°C
Gain Error
(4)
G
ERR
±0.25 ±2%
Gain Error Drift TCG
ERR
20 ppm/°C
Power-Supply Rejection Ratio PSRR 4.75V < V
DD
< 5.25V 80 dB
ANALOG INPUT
Full-Scale Range FSR +In – (–In) ±320 mV
Operating Common-Mode Signal
(3)
–0.1 5 V
Input Capacitance Common-Mode 3 pF
Input Leakage Current ±1nA
Differential Input Resistance Equivalent 28 kΩ
Differential Input Capacitance 5pF
Common-Mode Rejection Ratio CMRR At DC 90 dB
V
IN
= ±1.25Vp-p at 50kHz 85 dB
INTERNAL VOLTAGE REFERENCE
Reference Voltage V
OUT
Scale to 320mV 2.450 2.5 2.550 V
Accuracy
(4)
Scale to 320mV ±2%
Reference Temperature Drift dV
OUT
/dT ±20 ppm/°C
PSRR 80 dB
Startup Time 0.1 ms
INTERNAL CLOCK FOR MODES, 0, 1, AND 2
Clock Frequency 8 10 12 MHz
EXTERNAL CLOCK FOR MODE 3
Clock Frequency 16 20 24 MHz
AC ACCURACY
Signal-to-Noise Ratio + Distortion SINAD V
IN
= ±250mVp-p at 5kHz 70 dB
Signal-to-Noise Ratio SNR V
IN
= ±250mVp-p at 5kHz 67 70.5 dB
Total Harmonic Distortion THD V
IN
= ±250mVp-p at 5kHz –84 dB
Spurious Free Dynamic Range SFDR V
IN
= ±250mVp-p at 5kHz 84 dB
DIGITAL INPUT
Logic Family TTL with Schmitt Trigger
High-Level Input Voltage V
IH
2.6 V
DD
+ 0.3 V
Low-Level Input Voltage V
IL
–0.3 0.8 V
High-Level Input Current I
IH
V
I
= V
DD
0.005 2.5 µA
Low-Level Input Current I
IL
V
I
= GND –2.5 0.005 µA
Input Capacitance C
J
5pF
DIGITAL OUTPUT
High-Level Digital Output V
OH
V
DD
= 4.5V, I
O
= –5mA 4.6 V
V
DD
= 4.5V, I
O
= –15mA 3.9 V
Low-Level Digital Output V
OL
V
DD
= 4.5V, I
O
= 5mA 0.4 V
V
DD
= 4.5V, I
O
= 15mA 1.1 V
Output Capacitance C
O
5pF
Load Capacitance C
L
30 pF
POWER SUPPLY
Supply Voltage V
DD
4.5 5 5.5 V
Operating Supply Current I
CC
Mode 0 8 9.5 mA
Mode 3 6 7.5 mA
Power Dissipation V
DD
= 5V, Mode 0 40 47.5 mW
V
DD
= 5V, Mode 3 30 37.5 mW
OPERATING TEMPERATURE –40 +85 °C
NOTES: (1) All typical values are at T
A
= +25°C. (2) Integral nonlinearity is defined as the maximum deviation of the line through the end points of the transfer
curve for V
IN
+ = –250mV to +250mV, expressed either as the number of LSBs or as a percent of measured input range (500mV). (3) Ensured by design. (4)
Maximum values, including temperature drift, are ensured over the full specified temperature range.