TC7126CPL 查看數據表（PDF） - Microchip Technology

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TC7126CPL

3-1/2 Digit Analog-to-Digital Converters

Microchip Technology 

1.0 ELECTRICAL

CHARACTERISTICS

Absolute Maximum Ratings*

Supply Voltage (V+ to V-)....................................... 15V

Analog Input Voltage (either Input) (Note 1) ... V+ to V-

Reference Input Voltage (either Input) ............ V+ to V-

Clock Input ................................................... Test to V+

Package Power Dissipation (TA ≤ 70°C) (Note 2):

44-Pin PQFP............................................... 1.00W

40-Pin PLCC ............................................... 1.23W

44-Pin PDIP ................................................ 1.23W

Operating Temperature Range:

C (Commercial) Devices .................. 0°C to +70°C

I (Industrial) Devices .................... -25°C to +85°C

Storage Temperature Range.............. -65°C to +150°C

TC7126/A

*Stresses above those listed under “Absolute

Maximum Ratings” may cause permanent damage to

the device. These are stress ratings only and functional

operation of the device at these or any other conditions

above those indicated in the operation sections of the

specifications is not implied. Exposure to Absolute

Maximum Rating conditions for extended periods may

affect device reliability.

TABLE 1-1: TC7126/A ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VS = +9V, fCLK – 16kHz, and TA = +25°C, unless otherwise noted.

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

Input

ZIR

Zero Input Reading

ZRD

Zero Reading Drift

Ratiometric Reading

NL

Linearity Error

eN

IL

CMRR

Rollover Error

Noise

Input Leakage Current

Common Mode Rejection Ratio

Scale Factor Temperature

Coefficient

-000.0 ±000.0 +000.0

—

0.2

1

999 999/1000 1000

-1

±0.2

1

-1

±0.2

1

—

15

—

—

1

10

—

50

—

—

1

5

Digital

Reading

μV/°C

Digital

Reading

Count

Count

μVP-P

pA

μV/V

ppm/°C

VIN = 0V

Full Scale = 200mV

VIN = 0V, 0°C ≤ TA ≤ +70°C

VIN = VREF, VREF = 100mV

Full Scale = 200mV or 2V

Max Deviation From Best Fit

Straight Line

VIN- = VIN+ ≈ 200mV

VIN = 0V, Full Scale = 200mV

VIN = 0V

VCM = ±1V, VIN = 0V

Full Scale = 200mV

VIN = 199mV, 0°C ≤ TA ≤ +70°C

Ext. Ref. Temp Coeff. = 0ppm/°C

Analog Common

VCTC

Analog Common Temperature

Coefficient

—

—

—

—

—

80

—

—

250kΩ Between Common and V+

—

—

0°C ≤ TA ≤ +70°C (“C” Devices)

—

ppm/°C TC7126

—

35

75

ppm/°C TC7126A

—

35

100

ppm/°C -25°C ≤ TA ≤ +85°C (“I” Device)

(TC7126A)

Note 1: Input voltages may exceed the supply voltages, provided the input current is limited to ±100μA.

2: Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.

3: Refer to “Differential Input” discussion.

4: Backplane drive is in phase with segment drive for “OFF” segment, 180° out of phase for “ON” segment. Frequency is

20 times conversion rate. Average DC component is less than 50mV.

5: See “Typical Application”.

6: During Auto-Zero phase, current is 10-20μA higher. A 48kHz ocillator increases current by 8μA (Typical). Common

current is not included.

© 2006 Microchip Technology Inc.

DS21458C-page 5

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