TSC2046

SBAS265G − OCTOBER 2002 − REVISED JANUARY 2008

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3

ELECTRICAL CHARACTERISTICS: VS = +2.7V to +5.5V

At TA = −40°C to +85°C, +VCC = +2.7V, VREF = 2.5V internal voltage, fSAMPLE = 125kHz, fCLK = 16 • fSAMPLE = 2MHz, 12-bit mode, digital

inputs = GND or IOVDD, and +VCC must be ≥ IOVDD, unless otherwise noted.

TSC2046

PARAMETER

CONDITION

MIN

TYP

MAX

UNITS

ANALOG INPUT

Full-Scale Input Span

Positive Input−Negative Input

0

VREF

V

Absolute Input Range

Positive Input

−0.2

+VCC + 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

LSB(1)

Offset Error

±6

LSB

Gain Error

External VREF

±4

LSB

Noise

Including Internal VREF

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

VIN = 2.5VPP at 50kHz

100

dB

SWITCH DRIVERS

On-Resistance

Y+, X+

5

Ω

Y−, X−

6

Ω

Drive Current(2)

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

+VCC

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

1

G

Ω

Accuracy

VBAT = 0.5V to 5.5V, External VREF = 2.5V

−2

+2

%

VBAT = 0.5V to 5.5V, Internal Reference

−3

+3

%

TEMPERATURE MEASUREMENT

Temperature Range

−40

+85

°C

Resolution

Differential Method(3)

1.6

°C

TEMP0(4)

0.3

°C

Accuracy

Differential Method(3)

±2

°C

TEMP0(4)

±3

°C

(1) LSB means Least Significant Bit. With VREF = +2.5V, one LSB is 610µV.

(2) Assured by design, but not tested. Exceeding 50mA source current may result in device degradation.

(3) Difference between TEMP0 and TEMP1 measurement, no calibration necessary.

(4) Temperature drift is −2.1mV/°C.

(5) TSC2046 operates down to 2.2V.

(6) IOVDD must be ≤ (+VCC).

(7) Combined supply current from +VCC and IOVDD. Typical values obtained from conversions on AUX input with PD0 = 0.