Datasheet

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ADS7826
ADS7827
ADS7829
SLAS388–JUNE 2003
SPECIFICATIONS (continued)
At -40°C to 85°C, V
CC
= 2.7 V, V
ref
= 2.5 V, unless otherwise specified.
ADS7829IB ADS7829 ADS7826I ADS7827I
TEST
PARAMETER UNIT
CONDITIONS
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
V
OH
I
OH
= -250 µA 2.2 2.1 2.1 2.1 V
V
OL
I
OL
= 250 µA 0.4 0.4 0.4 0.4 V
Data format Straight binary Straight binary Straight binary Straight binary
POWER SUPPLY REQUIREMENTS
VCC Operating range 2.7 3.6 2.7 3.6 2.7 3.6 2.7 3.6 V
See
(3)
and
(2)
2.0 2.7 2.0 2.7 2.0 2.7 2.0 2.7 V
See
(2)
3.6 5.25 3.6 5.25 3.6 5.25 3.6 5.25 V
Quiescent cur- Full speed
(4)
220 350 220 350 250 350 260 350 µA
rent
f
SAMPLE
= 7.5 kHz 20 20 20 20 µA
(5)
,
f
SAMPLE
= 7.5 kHz 180 180 180 180 µA
(6)
Power down CS = V
CC
3 3 3 3 µA
TEMPERATURE RANGE
Specified performance -40 85 -40 85 -40 85 -40 85 °C
(4)
Full speed: 125 ksps for ADS7829, 200 ksps for ADS7826, and 250 ksps for ADS7827.
(5)
f
DCLOCK
= 1.2 MHz, CS = V
CC
for 145 clock cycles out of every 160 for the ADS7829I and ADS7829IB.
(6)
See the Power Dissipation section for more information regarding lower sample rates.
At -40°C to 85°C, V
CC
= 5 V, V
ref
= 5 V, unless otherwise specified.
ADS7829IB ADS7829 ADS7826I ADS7827I
PARAMETER TEST CONDITIONS UNIT
MIN TYP MAX MIN TYP MAX MIN TYP MAX MIN TYP MAX
SYSTEM PERFORMANCE
Resolution 12 12 10 8 Bits
No missing codes 12 11 10 8 Bits
Integral linearity error ±0.6 ±0.8 ±0.15 ±0.1 1 LSB
(7)
Differential linearity error ±0.5 ±0.8 ±0.15 ±0.1 1 LSB
ANALOG INPUT
Offset error ±2.6 ±2.6 ±1.2 ±0.7 LSB
Gain error ±1.2 ±1.2 ±0.2 ±0.1 LSB
REFERENCE INPUT
Voltage range 0.05 V
CC
0.05 V
CC
0.05 V
CC
0.05 V
CC
V
(7)
LSB means Least Significant Bit . With V
ref
equal to 5 V, one LSB is 1.22 mV for a 12 bit ADC.
4