MSC1210 datasheet(6/83 Pages) TI

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MSC1210

SBAS203F − MARCH 2002 − REVISED NOVEMBER 2004

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ELECTRICAL CHARACTERISTICS: AVDD = 3V (continued)

All specifications from TMIN to TMAX, DVDD = +2.7V to 5.25V, fMOD = 15.625kHz, PGA = 1, Buffer ON, fDATA = 10Hz, Bipolar, and VREF = (REF IN+) − (REF IN−) =

+1.25V, unless otherwise noted.

MSC1210Yx

PARAMETER

UNITS

MAX

TYP

MIN

CONDITIONS

VOLTAGE REFERENCE INPUT

Reference Input Range

REF IN+, REF IN−

AGND

AVDD(2)

VREF

VREF = (REF IN+) − (REF IN−)

0.1

1.25

AVDD

VREF Common-Mode Rejection

At DC

130

VREF Common-Mode Rejection

fCM = 60Hz, fDATA = 60Hz

120

Input Current(4)

VREF = 1.25V

1.5

µA

ON-CHIP VOLTAGE REFERENCE

Output Voltage

VREFH = 0 at +25

°C, ACLK = 1MHz

1.245

1.25

1.255

Power-Supply Rejection Ratio

Short-Circuit Current Source

Short-Circuit Current Sink

µA

Short-Circuit Duration

Sink or Source

Indefinite

Drift

ppm/

°C

Output Impedance

Sourcing 100

µA

Ω

Startup Time from Power OFF

CREF = 0.1µF

Temperature Sensor Voltage

T = +25

°C

115

Temperature Sensor Coefficient

375

µV/°C

ANALOG POWER-SUPPLY REQUIREMENTS

Analog Power-Supply Voltage

AVDD

2.7

3.6

Analog Current

(IADC + IVREF)

PDADC = 1, ALVDIS = 1, DAB = 1

< 1

PGA = 1, Buffer OFF

200

µA

Analog

Power-Supply

ADC Current

PGA = 128, Buffer OFF

500

µA

Power-Supply

Current

ADC Current

(IADC)

PGA = 1, Buffer ON

240

µA

Current

ADC

PGA = 128, Buffer ON

850

µA

VREF Supply Current

(IVREF)

240

µA

(1)

Calibration can minimize these errors.

(2)

The gain calibration cannot have a REF IN+ of more than

AVDD −1.5V with Buffer ON. To calibrate gain, turn Buffer OFF.

(3)

∆VOUT is change in digital result.

(4)

9pF switched capacitor at

fSAMP clock frequency (see Figure 13).

(5)

The input impedance for PGA = 128 is the same as that for PGA = 64 (that is, 7M

Ω/64).

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