DDC232 Datasheet, PDF (4/28 Pages) Burr-Brown (TI) – 32-Channel, Current-Input Analog-to-Digital Converter

DDC232
SBAS331C – AUGUST 2004 – REVISED SEPTEMBER 2006
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
At T_A = +25°C, AVDD = +5V, DVDD = +3.0V, VREF = +4.096V, t_INT = 333µs in Low-Power mode (CLK = 5MHz),
Range = 7, and continuous mode operation, unless otherwise noted.
PARAMETER
TEST CONDITIONS
PERFORMANCE OVER TEMPERATURE
Offset Drift
Offset Drift Stability
DC Bias Voltage Drift⁽⁸⁾
Input Bias Current Drift
Range Drift⁽⁹⁾
TA = +25°C to +45°C
Range Drift Match⁽¹⁰⁾
REFERENCE
Voltage
Input Current⁽¹¹⁾
DIGITAL INPUT/OUTPUT
Average Value with tINT = 333µs
Average Value with tINT = 166.5µs
Logic Levels
VIH
VIL
VOH
VOL
Input Current (IIN)
Data Format⁽¹²⁾
IOH = –500µA
IOL = 500µA
0 < VIN < DVDD
POWER-SUPPLY REQUIREMENTS
Analog Power-Supply Voltage (AVDD)
Digital Power-Supply Voltage (DVDD)
Supply Current
Analog Current
Low-Power Mode
High-Speed Mode
Digital Current
Low-Power Mode
High-Speed Mode
Total Power Dissipation
Low-Power Mode
High-Speed Mode
Per Channel Power Dissipation
Low-Power Mode
High-Speed Mode
DDC232C
MIN
TYP
MAX
±0.5
5 ⁽⁷⁾
±0.2
2 ⁽⁷⁾
±3
0.01
1 ⁽⁷⁾
25
50
±5
4.000
4.096
325
650
4.200
DDC232CK
MIN
TYP
MAX
UNIT
±0.5
±0.2
±3
0.01
25
±5
5 ⁽⁷⁾
ppm of FSR/°C
2 ⁽⁷⁾
ppm of FSR/minute
µV/°C
1 ⁽⁷⁾
pA/°C
50
ppm/°C
ppm/°C
4.000
4.096
4.200
V
325
µA
650
µA
(0.8)DVDD
DVDD + 0.1 (0.8)DVDD
DVDD + 0.1
V
–0.1
(0.2)DVDD
–0.1
(0.2)DVDD
V
DVDD – 0.4
DVDD – 0.4
V
0.4
0.4
V
±10
±10
µA
Straight Binary
Straight Binary
4.75
5.0
5.25
4.75
5.0
5.25
V
2.7
3.0
3.6
2.7
3.0
3.6
V
41
Not Supported
3.7
Not Supported
224
288
Not Supported
7
9
Not Supported
41
60
3.7
7.0
224
288
320
7
9
10
mA
mA
mA
mA
mW
mW
mW/Channel
mW/Channel
(7) Ensured by design, not production tested.
(8) Voltage produced by the DDC232 at its input that is applied to the sensor.
(9) Range drift does not include external reference drift.
(10) Matching between side A and side B of the same input.
(11) Input reference current decreases with increasing t_INT (see the Voltage Reference section, page 10).
(12) Data format is Straight Binary with a small offset. The number of bits in the output word is controlled by the Format bit.
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