SP8542/8544DS/01

SP8542/8544 Two and Four Channel 12-Bit Multiplexed Sampling ADC's

© Copyright 2000 Sipex Corporation

2

SPECIFICATIONS

Unless otherwise noted the following specifications apply for V

PARAMETER

MIN.

TYP.

MAX.

UNIT

CONDITIONS

DC Accuracy

Resolution

12

Bits

Integral Linearity

J, A

+0.6

+1.0

LSB

K ,B

+0.4

+0.75

LSB

Differential Linearity Error

J, A

+0.5

+1.0

LSB

No Missing Codes

K ,B

+0.5

+1.0

LSB

No Missing Codes

Gain Error

J, A

+0.2

+1.0

%FSR

Externally Trimmable to Zero

K,B

+0.1

+0.5

%FSR

Externally Trimmable to Zero

Offset Error

J, A

+4

+7

LSB

Externally Trimmable to Zero

K,B

+3

+5

LSB

Externally Trimmable to Zero

Analog Input

0 to 2.5

Volts

Input Impedance

On Channel

8

pF

In series with 1.4K

Ω

Off Channel (2)

1.0

G

Ω

note 2

Input Bias Current

1.0

nA

Channel to Channel

Crosstalk

Off to On Channel

-90

-80

dB

@ 10KHz Full Scale sine wave

Conversion Speed

Sample Time (1)

400

ns

Conversion Time (1)

3.75

µs

Complete Cycle (1)

4.25

µs

Convert Rate (1)

117.6

KHz

2 Channels

Clock Speed

4

MHz

Date Rate (1)

235

KHz

Total Conversion Rate

Convert Rate (1)

58.8

KHz

4 Channels

ABSOLUTE MAXIMUM RATINGS

(TA=+25˚C unless otherwise noted) ..............................................

VDD to DGND ............................................................. -0.3V to +7V

VDA to AGND .............................................................. -0.3V to +7V

Vin to AGND .................................................... -0.3V to VDA +0.3V

Digital Input to VSS ........................................... -0.3V to VDD+0.3V

Digital Output to VSS ........................................ -0.3V to VDD+0.3V

Operating Temp. Range

Commercial (J,K Version) ............................... 0˚C to 70˚C

Industrial (A,B Version) ............................. -40˚C to +85˚C

Storage Temperature ............................................... -65˚C to 150˚C

Lead Temperature(Solder 10sec) ...................................... +300˚C

Power Dissipation to +70˚C ............................................... 500mW

Derate Power Dissipation Above 70˚C ......................... 10mW/ ˚C