Datasheet

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SBAS317E − APRIL 2004 − REVISED MAY 2006
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6
ELECTRICAL CHARACTERISTICS: AV
DD
= 3V (continued)
All specifications from T
MIN
to T
MAX
, DV
DD
= +2.7V to +5.25V, f
MOD
= 15.625kHz, PGA = 1, Buffer ON, f
DATA
= 10Hz, ADC Bipolar Mode, and
V
REF
≡ (REF IN+) − (REF IN−) = +1.25V, unless otherwise noted.
MSC120x
PARAMETER UNITSMAXTYPMINCONDITIONS
Voltage Reference Input
Reference Input Range REF IN+, REF IN− AGND AV
DD
(3)
V
ADC V
REF
V
REF
≡ (REFIN+) − (REFIN−) 0.1 1.25 AV
DD
V
V
REF
Common-Mode Rejection At DC 110 dB
Input Current V
REF
= 1.25V, PGA = 1 0.5 µA
On-Chip Voltage Reference
Output Voltage VREFH = 0, T = +25°C 1.23 1.25 1.27 V
Short-Circuit Current Source 2.9 mA
Short-Circuit Current Sink 60 µA
Short-Circuit Duration Sink or Source Indefinite
Startup Time from Power ON C
REFOUT
= 0.1µF 0.2 ms
Temperature Sensor
Temperature Sensor Voltage T = +25°C 115 mV
Temperature Sensor Coefficient
MSC1200 375 µV/°C
Temperature Sensor Coefficient
MSC1201, MSC1202 345 µV/°C
IDAC Output Characteristics
IDAC Resolution 8 Bits
Full-Scale Output Source Current 1 mA
Maximum Short-Circuit Current Duration Indefinite
Compliance Voltage AV
DD
− 1.5 V
IDAC Zero Code Current 0 µA
IDAC INL 1.5 LSB
Analog Power-Supply Requirements
Analog Power-Supply Voltage AV
DD
2.7 3.3 3.6 V
Analog Current
BOR OFF, External Clock Mode, Analog OFF,
ALVD OFF, PDADC = PDIDAC = 1
< 1 nA
PGA = 1, Buffer OFF 150 µA
Analog
ADC Current
PGA = 128, Buffer OFF 380 µA
Analog
Power-Supply
ADC Current
(I
ADC
)
PGA = 1, Buffer ON 200 µA
Power-Supply
Current
ADC
PGA = 128, Buffer ON 610 µA
Current
V
REF
Supply Current
(I
VREF
)
ADC ON 330 µA
I
DAC
Supply Current
(I
IDAC
)
IDAC = 00h 220 µA
(1)
The input impedance for PGA = 128 is the same as that for PGA = 64 (that is, 7MΩ/64).
(2)
Calibration can minimize these errors.
(3)
The gain self-calibration cannot have a REF IN+ of more than AV
DD
−1.5V with Buffer ON. To calibrate gain, turn Buffer OFF.
(4)
∆V
OUT
is change in digital result.