SC1200 datasheet(4/60 Pages) TI

4 / 60 page

MSC1200

SBAS289E

www.ti.com

ELECTRICAL CHARACTERISTICS: AVDD = 3V

All specifications from TMIN to TMAX, AVDD = +3V, 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.

MSC1200Yx

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

ANALOG INPUT (AIN0-AIN7, AINCOM)

Analog Input Range

Buffer OFF

AGND – 0.1

AVDD + 0.1

Buffer ON

AGND + 50mV

AVDD – 1.5

Full-Scale Input Voltage Range

(In+) – (In–)

±V

REF/PGA

Differential Input Impedance

Buffer OFF

7/PGA

Ω

Input Current

Buffer ON

0.5

Bandwidth

Fast Settling Filter

–3dB

0.469 • fDATA

Sinc2 Filter

–3dB

0.318 • fDATA

Sinc3 Filter

–3dB

0.262 • fDATA

Programmable Gain Amplifier

User-Selectable Gain Ranges

128

Input Capacitance

Buffer On

Input Leakage Current

Multiplexer Channel Off, T = +25

°C

0.5

Burnout Current Sources

Buffer ON

±2

µA

ADC OFFSET DAC

Offset DAC Range

±V

REF/(2 • PGA)

Offset DAC Monotonicity

Bits

Offset DAC Gain Error

±1.5

% of Range

Offset DAC Gain Error Drift

0.6

ppm/

°C

SYSTEM PERFORMANCE

Resolution

Bits

ENOB

Bits

Output Noise

See Typical Characteristics

No Missing Codes

Sinc3 Filter

Bits

Integral Nonlinearity

End Point Fit, Differential Input

±0.0004

±0.0015

%FSR

Offset Error

After Calibration

1.3

ppm of FS

Offset Drift(1)

Before Calibration

0.02

ppm of FS/

°C

Gain Error(2)

After Calibration

0.005

Gain Error Drift(1)

Before Calibration

0.5

ppm/

°C

System Gain Calibration Range

120

% of FS

System Offset Calibration Range

–50

% of FS

Common-Mode Rejection

At DC

100

130

fCM = 60Hz, fDATA = 10Hz

130

fCM = 50Hz, fDATA = 50Hz

120

fCM = 60Hz, fDATA = 60Hz

120

Normal Mode Rejection

fSIG = 50Hz, fDATA = 50Hz

100

fSIG = 60Hz, fDATA = 60Hz

100

Power-Supply Rejection

At DC, dB = –20log(DVOUT/DVDD)(3)

VOLTAGE REFERENCE INPUTS

Reference Input Range

REF IN+, REF IN–

AGND

AVDD(2)

VREF

VREF ≡ (REF IN+) – (REF IN–)

0.3

1.25

AVDD

Common-Mode Rejection

At DC

110

Input Current

VREF = 1.25V, PGA = 1

0.5

µA

ON-CHIP VOLTAGE REFERENCE

Output Voltage

VREFH = 0 at +25

°C

1.25

Short-Circuit Current Source

4mA

Short-Circuit Current Sink

µA

Short-Circuit Duration

Sink or Source

Indefinite

Startup Time from Power ON

0.2

Temperature Sensor

Temperature Sensor Voltage

T = +25

°C

115

Temperature Sensor Coefficient

375

µV/°C

IDAC OUTPUT CHARACTERISTICS

Full-Scale Output Current

1mA

Maximum Short-Circuit Current Duration

Indefinite

Compliance Voltage

AVDD – 1.5

POWER-SUPPLY REQUIREMENTS

Power-Supply Voltage

AVDD

2.7

3.0

3.6

Analog Current

Analog OFF, ALVD OFF, PDADC = PDIDAC = 1

< 1

ADC Current

IADC

PGA = 1, Buffer OFF

150

µA

PGA = 128, Buffer OFF

380

µA

PGA = 1, Buffer ON

200

µA

PGA = 128, Buffer ON

610

µA

VREF Supply Current

IVREF

ADC ON

330

µA

IDAC Supply Current

IIDAC

IDAC = 00H

220

µA

NOTES: (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) DVOUT is change in digital result.

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