ADS7846

3

SBAS125H

www.ti.com

ANALOG INPUT

Full-Scale Input Span

Positive Input-Negative Input

0

V

Absolute Input Range

Positive Input

–0.2

V

Negative Input

–0.2

+0.2

V

Capacitance

25

pF

Leakage Current

0.1

µA

SYSTEM PERFORMANCE

Resolution

12

Bits

No Missing Codes

11

Bits

Integral Linearity Error

±2

Offset Error

±6LSB

Gain Error

±4LSB

Noise

70

µVrms

Power-Supply Rejection

70

dB

SAMPLING DYNAMICS

Conversion Time

12

CLK Cycles

Acquisition Time

3

CLK Cycles

Throughput Rate

125

kHz

Multiplexer Settling Time

500

ns

Aperture Delay

30

ns

Aperture Jitter

100

ps

Channel-to-Channel Isolation

100

dB

SWITCH DRIVERS

On-Resistance

Y+, X+

5

Ω

Y–, X–

6

Ω

Duration 100ms

50

mA

REFERENCE OUTPUT

Internal Reference Voltage

2.45

2.50

2.55

V

Internal Reference Drift

15

ppm/

°C

Quiescent Current

500

µA

REFERENCE INPUT

Range

1.0

V

Input Impedance

SER/DFR = 0, PD1 = 0,

1

G

Ω

Internal Reference Off

Internal Reference On

250

Ω

BATTERY MONITOR

Input Voltage Range

0.5

6.0

V

Input Impedance

Sampling Battery

10

k

Ω

Battery Monitor Off

1G

Ω

Accuracy

–2+2

%

Internal Reference

–3+3

%

TEMPERATURE MEASUREMENT

Temperature Range

–40

+85

°C

Resolution

1.6

°C

0.3

°C

Accuracy

±2

°C

±3

°C

DIGITAL INPUT/OUTPUT

Logic Family

CMOS

–0.3

+0.8

V

V

0.4

V

PENIRQ

0.8

V

Data Format

Straight Binary

POWER-SUPPLY REQUIREMENTS

Specified Performance

2.7

3.6

V

Operating Range

2.2

5.25

V

Quiescent Current

Internal Reference Off

280

650

µA

Internal Reference On

780

µA

220

µA

Power-Down Mode with

3

µA

Power Dissipation

1.8

mW

TEMPERATURE RANGE

Specified Performance

–40

+85

°C

may result in device degradation. (3) Difference between TEMP0 and TEMP1 measurement. No calibration necessary. (4) Temperature drift is –2.1mV/

°C.

(5) ADS7846 operates down to 2.2V.

ADS7846E

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

ELECTRICAL CHARACTERISTICS

unless otherwise noted.