34921 datasheet(12/36 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

34921

STATIC ELECTRICAL CHARACTERISTICS

Analog Encoder Interface Current-to-Voltage Conversion Stage

Minimum Offset Current

IOFFSET_MIN

-6.0

-8.0

-10

µA

Midpoint Offset Current

IOFFSET_MID

-0.5

0.0

0.5

µA

Maximum Offset Current

IOFFSET_MAX

6.0

8.0

µA

Offset Step Size (1 LSB)

IOFFSTEP

0.25

0.5

0.75

µA

Analog-to-Digital Converter

Resolution, No Missing Codes

ADC

–

8.0

Bits

Measurement Range for Correct Conversion

IMR

0.0

–

5.0

Linearity Error (16)

Over Input Voltage Range of 4% to 96% Ideal Measurement Range

(IMR) max. Over Time and Temperature (14), (15)

VIN = -0.5 to 5.5 V (17)

INL

–

0.4

±1.0 LSB

–

Input Leakage Current (ANx)

V5.0 = 5.0 V, TJ = 25°C, VANx = 5.0 V, ANALOG_TEST MODE = 0,

Channel Not Selected

ILEAKAGE

–

0.1

µA

Notes

14.

Errors include effects of multiplexer and sample and hold circuitry, including droop.

15.

The Linearity Error is the worst case error caused by the differential and integral nonlinearity.

16.

An LSB (least significant bit) is defined as follows:

17.

The ADC will read full scale at VIN = 5.0 V. If VIN on one input exceeds this value, the value of other inputs may become unreadable.

Table 3. Static Electrical Characteristics (continued)

Characteristics noted under conditions 16 V ≤ B+ ≤ 34 V, 0

°C ≤ TA ≤ 70°C, and 0°C ≤ TJ ≤ 100°C unless otherwise noted.

Typical values noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

LSB =

IMR

2#BITS-1

Volts

Where:

IMR is the Ideal Measurement Range.

#BITS is the resolution of the ADC.

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