Datasheet

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SBAS317E − APRIL 2004 − REVISED MAY 2006
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4
ELECTRICAL CHARACTERISTICS: AV
DD
= 5V (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−) = +2.5V, unless otherwise noted.
MSC120x
PARAMETER UNITSMAXTYPMINCONDITION
Voltage Reference Input
Reference Input Range REF IN+, REF IN− AGND AV
DD
(3)
V
ADC V
REF
V
REF
≡ (REFIN+) − (REFIN−) 0.1 2.5 AV
DD
V
V
REF
Common-Mode Rejection At DC 115 dB
Input Current V
REF
= 2.5V, PGA = 1 1 µA
On-Chip Voltage Reference
Output Voltage
VREFH = 1, T = +25°C 2.49 2.5 2.51 V
Output Voltage
VREFH = 0 1.23 1.25 1.27 V
Short-Circuit Current Source 8 mA
Short-Circuit Current Sink 65 µA
Short-Circuit Duration Sink or Source Indefinite
Startup Time from Power ON C
REFOUT
= 0.1µF 0.4 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 Current IDAC = 0FFh 1 mA
Maximum Short-Circuit Current Duration Indefinite
Compliance Voltage IDAC = 00h AV
DD
− 1.5 V
IDAC Zero Code Current 0 µA
IDAC INL 1.3 LSB
Analog Power-Supply Requirements
Analog Power-Supply Voltage AV
DD
4.75 5.0 5.25 V
Analog Current
BOR OFF, External Clock Mode, Analog OFF,
ALVD OFF, PDADC = PDIDAC = 1
< 1 nA
PGA = 1, Buffer OFF 170 µA
Analog
ADC Current
PGA = 128, Buffer OFF 430 µA
Analog
Power-Supply
ADC Current
(I
ADC
)
PGA = 1, Buffer ON 230 µA
Power-Supply
Current
ADC
PGA = 128, Buffer ON 770 µA
Current
V
REF
Supply Current
(I
VREF
)
ADC ON 360 µA
I
DAC
Supply Current
(I
IDAC
)
IDAC = 00h 230 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.