TC14433AELITR datasheet, PDF - EEWORLD Datasheet

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TC14433AELITR: Description1-CH DUAL-SLOPE ADC, SERIAL ACCESS, PQCC28, PLASTIC, LCC-28; CategoryAnalog mixed-signal IC converter; File Size496KB，20 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com; Environmental Compliance

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TC14433AELITR Overview

1-CH DUAL-SLOPE ADC, SERIAL ACCESS, PQCC28, PLASTIC, LCC-28

TC14433AELITR Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Microchip
Parts packaging code	QLCC
package instruction	PLASTIC, LCC-28
Contacts	28
Reach Compliance Code	compliant
ECCN code	EAR99
Maximum analog input voltage	0.2 V
Converter type	ADC, DUAL-SLOPE
JESD-30 code	S-PQCC-J28
JESD-609 code	e3
length	11.505 mm
Maximum linear error (EL)	0.05%
Humidity sensitivity level	1
Nominal negative supply voltage	-5 V
Number of analog input channels	1
Number of digits	3
Number of functions	1
Number of terminals	28
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Output bit code	BINARY
Output format	SERIAL
Package body material	PLASTIC/EPOXY
encapsulated code	QCCJ
Encapsulate equivalent code	LDCC28,.5SQ
Package shape	SQUARE
Package form	CHIP CARRIER
Peak Reflow Temperature (Celsius)	245
power supply	+-5 V
Certification status	Not Qualified
Maximum seat height	4.57 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Temperature level	INDUSTRIAL
Terminal surface	Matte Tin (Sn)
Terminal form	J BEND
Terminal pitch	1.27 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	40
width	11.505 mm

TC14433AELITR Preview

TC14433/A

3-1/2 Digit, Analog-to-Digital Converter

Features

•

Accuracy: ±0.05% of Reading ±1 Count

Two Voltage Ranges: 1.999V and 199.9 mV

Up to 25 Conversions Per Second

> 1000M Ohms

Single Positive Voltage Reference

Auto-Polarity and Auto-Zero

Overrange and Underrange Signals Available

Operates in Auto-Ranging Circuits

Uses On-Chip System Clock or External Clock

Wide Supply Range: ±4.5V to ±8V

Package Type

24-Pin PDIP (Wide)

24-Pin CERDIP (Wide)

24-Pin SOIC (Wide)

REF

24 V

23 Q

22 Q

21 Q

TC14433/A

20 Q0

19 DS

18 DS

17 DS

16 DS

15 OR

14 EOC

13 V

Applications

•

Portable Instruments

Digital Voltmeters

Digital Panel Meters

Digital Scales

Digital Thermometers

Remote A/D Sensing Systems

MPU Systems

CLK1 10

CLK0

Device Selection Table

Part Number

TC14433AEJG

TC14433AELI

TC14433AEPG

TC14433COG

TC14433EJG

TC14433ELI

TC14433EPG

Package

24-Pin CERDIP

(Wide)

28-Pin PLCC

24-Pin PDIP

(Wide)

24-Pin SOIC

(Wide)

24-Pin CERDIP

(Wide)

28-Pin PLCC

24-Pin PDIP

(Wide)

Temperature

Range

-40°C to +85°C

28-Pin PLCC

REF

25 Q

24 Q

23 DS

22 NC

21 DS

20 DS

28 27 26

-40°C to +85°C

0°C to +70°C

-40°C to +85°C

R1/C

NC 8

CO1 9

DU 11

12 13 14 15 16 17 18

EOC

CLK1

CLK0

TC14433/A

19 DS

Note 1:

NC = No internal connection (In 28-Pin PLCC).

24-Pin SOIC (Wide) package, only for

TC14433 device.

2002 Microchip Technology Inc.

DS21394B-page 1

TC14433/A

General Description

The TC14433 is a low power, high performance,

monolithic CMOS 3-1/2 digit A/D converter. The

TC14433 combines both analog and digital circuits on

a single IC, thus minimizing the number of external

components.

This dual slope A/D converter provides automatic

polarity and zero correction with the addition of two

external resistors and two capacitors. The full scale

voltage range of this ratiometric IC extends from 199.9

millivolts to 1.999 volts. The TC14433 can operate over

a wide range of power supply voltages, including

batteries and standard 5-volt supplies.

The TC14433A features improved performance over

the industry standard TC14433. Rollover, which is the

measurement of identical positive and negative

signals, is specified to have the same reading within

one count for the TC14433A. Power consumption of

the TC14433A is typically 4mW, approximately one-

half that of the industry standard TC14433.

The TC14433/A is available in 24-Pin PDIP, 24-Pin

CERDIP, 24-Pin SOIC (TC14433 device only), and

28-Pin PLCC packages.

Typical Application

MCP1525

+5V

OUT

1µF

300k

11 10 2 12 24

TC14433

15 19 18 17 16

+5V

0.1

20k

-5V

+5V

0.1µF

-5V

1413

Minus Sign

f g e d c b a

+5V

Segment

Resistors

150Ω (7)

0.1µF**

4543B 14

8 6 7

-5V

5 S 1

3 D

C RQ

9 D S Q 13

11 C Q 12

710 14

+5V

= 470kΩ for 2V Range

= 27kΩ for 200mV Range

**Mylar Capacitor

14013B

200Ω

MPS-A12 Plus Sign

-5V

110Ω

51k

Common

Anode Led

+5V

Display

50µF

0.1µF

MPS-A12

(4)

-5V

DS4

DS3

DS2

DS1

-5V

DS21394B-page 2

2002 Microchip Technology Inc.

TC14433/A

1.0

ELECTRICAL

CHARACTERISTICS

*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.

Absolute Maximum Ratings*

Supply Voltage (V

– V

) ................... -0.5V to +18V

Voltage on Any Pin:

Reference to V

.....................-0.5V to (V

+ 0.5)

DC Current, Any Pin: ........................................ ±10mA

Power Dissipation (T

≤

70°C):

Plastic PLCC ................................................. 1.0W

Plastic PDIP.................................................. 940W

SOIC ............................................................. 940W

CERDIP ....................................................... 1.45W

Operating Temperature Range ............... 0°C to +70°C

Storage Temperature Range .............. -65°C to +160°C

TC14433/A ELECTRICAL SPECIFICATIONS

Electrical Characteristics:

= +5V, V

= -5V, C

= 0.1µF, (Mylar), C

= 0.1µF, R

= 300kΩ, R

= 470kΩ @ V

REF

= 2V,

= 27kΩ @ V

REF

= 200mV, unless otherwise specified.

Symbol

Analog Input

SYE

Rollover Error (Positive) and

Negative Full Scale

Symmetry

Linearity Output Reading

(Note 1)

Stability Output Reading

(Note 2)

-1

Parameter

Min

Typ

= +25°C

—

Max

Min

Typ

= +25°C

—

Counts 200mV Full Scale

-V

= +V

%rdg

LSD

= 1.4V, V

REF

= 2V,

= 32kHz

REF

= 2V

REF

= 200mV

= 1.99V,

REF

= 2V

= 199mV,

REF

= 200mV

= 0V, V

REF

= 2V

Max

Units

Test Conditions

SOR

-0.05

-1 count

—

+0.05

—

±20

+0.05

+1 count

±100

—

ZOR

Zero Output Reading

Bias Current: Analog Input

Reference Input

Analog Ground

—

CMRR

Common mode Rejection

Note 1:

Accuracy - The accuracy of the meter at full scale is the accuracy of the setting of the reference voltage. Zero is

recalculated during each conversion cycle. The meaningful specification is linearity. In other words, the deviation from

correct reading for all inputs other than positive full scale and zero is defined as the linearity specification.

The LSD stability for 200mV scale is defined as the range that the LSD will occupy 95% of the time.

Pin numbers refer to 24-pin PDIP.

2002 Microchip Technology Inc.

DS21394B-page 3

TC14433/A

TC14433/A ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics:

= +5V, V

= -5V, C

= 0.1µF, (Mylar), C

= 0.1µF, R

= 300kΩ, R

= 470kΩ @ V

REF

= 2V,

= 27kΩ @ V

REF

= 200mV, unless otherwise specified.

Symbol

Digital

Output Voltage

(Pins 14 to 23)

(Note 3)

Output Voltage

(Pins 14 to 23)

(Note 3)

Output Current

(Pins 14 to 23)

—

4.95

-0.2

- 0.5

Output Current

(Pins 14 to 23)

0.51

1.3

CLK

Power

Quiescent Current: 14433A:

—

Quiescent Current: 14433:

—

PSRR

Supply Rejection

—

0.4

1.4

—

0.9

1.8

0.5

—

3.7

7.4

—

3.7

7.4

—

mV/V

to V

, I

= 0

= 5, V

= -5

= 8, V

= -8

to V

, I

= 0

= 5, V

= -5

= 8, V

= -8

to V

, I

= 0,

REF

= 2V,

= 5, V

= -5

Clock Frequency

Input Current -DU

—

-5

-0.36

-0.9

0.88

2.25

±0.00001

0.05

-4.95

—

±0.3

—

4.95

-0.14

-0.35

0.36

0.9

—

0.05

-4.95

—

±1

kHz

µA

= 0 V, "0" Level

= -5V, "0" Level

= 0V, "1" Level

= -5V, "1" Level

= 0V, V

= 4.6V

Source

= -5V, V

= 5V

Source

= 0V, V

= 0.4V

Sink

= -5V,

= -4.5V Sink

= 300kΩ

Parameter

Min

Typ

Max

Min

Typ

Max

Units

Test Conditions

Note 1:

Accuracy - The accuracy of the meter at full scale is the accuracy of the setting of the reference voltage. Zero is

recalculated during each conversion cycle. The meaningful specification is linearity. In other words, the deviation from

correct reading for all inputs other than positive full scale and zero is defined as the linearity specification.

The LSD stability for 200mV scale is defined as the range that the LSD will occupy 95% of the time.

Pin numbers refer to 24-pin PDIP.

DS21394B-page 4

2002 Microchip Technology Inc.

TC14433/A

2.0

PIN DESCRIPTIONS

The descriptions of the pins are listed in Table 2.0.

TABLE 2-1:

Pin No.

(24-Pin PDIP)

(24-Pin CERDIP)

(24-Pin SOIC)

PIN FUNCTION TABLE

Pin No.

Symbol

(28-Pin PLCC)

REF

Description

This is the analog ground. It has a high input impedance. The pin determines the

reference level for the unknown input voltage (V

) and the reference voltage (V

REF

Reference voltage - Full scale output is equal to the voltage applied to V

REF

Therefore, full scale voltage of 1.999V requires 2V reference and 199.9mV full scale

requires a 200mV reference. V

REF

functions as system reset also. When switched

to V

, the system is reset to the beginning of the conversion cycle.

The unknown input voltage (V

) is measured as a ratio of the reference voltage

REF

) in a rationetric A/D conversion.

This pin is for external components used for the integration function in the dual

slope conversion. Typical values are 0.1µF (mylar) capacitor for C

= 470kΩ (resistor) for 2V full scale.

= 27kΩ (resistor) for 200mV full scale. Clock frequency of 66kHz gives 250msec

conversion time.

These pins are used for connecting the offset correction capacitor.

The recommended value is 0.1µF.

These pins are used for connecting the offset correction capacitor.

The recommended value is 0.1µF.

Display update input pin. When DU is connected to the EOC output, every

conversion is displayed. New data will be strobed into the output latches during the

conversion cycle if a positive edge is received on DU, prior to the ramp down cycle.

When this pin is driven from an external source, the voltage should be referenced

to V

Clock input pins. The TC14433 has its own oscillator system clock. Connecting a

single resistor between CLK

and CLK

sets the clock frequency.

A crystal or OC circuit may be inserted in lieu of a resistor for improved CLK

, the

clock input, can be driven from an external clock source, which need only have

standard CMOS output drive. This pin is referenced to V

for external clock inputs.

A 300kΩ resistor yields a clock frequency of about 66kHz. See Section 5.0 Typical

Characteristics. (Also see Figure 4-3 for alternate circuits.)

Negative power current. Connection pin for the most negative supply. Please note

the current for the output drive circuit is returned through V

. Typical supply

current is 0.8mA.

Negative power supply for output circuitry. This pin sets the low voltage level for the

output pins (BCD, Digit Selects, EOC, OR). When connected to analog ground, the

output voltage is from analog ground to V

. If connected to V

, the output swing

is from V

to V

. The recommended operating range for V

is between the

-3 volts and V

End of conversion output generates a pulse at the end of each conversion cycle.

This generated pulse width is equal to one half the period of the system clock.

Overrange pin. Normally this pin is set high. When V

exceeds V

REF

the OR is low.

Digit select pin. The digit select output goes high when the respective digit is

selected. The MSD (1/2 digit turns on immediately after an EOC pulse).

The remaining digits turn on in sequence from MSD to LSD.

To ensure that the BCD data has settled, an inter digit blanking time of two clock

periods is included.

Clock frequency divided by 80 equals multiplex rate. For example, a system clock of

60kHz gives a multiplex rate of 0.8kHz.

See Figure 4-4 for digit select timing diagram.

CLK

EOC

2002 Microchip Technology Inc.

DS21394B-page 5

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TC14433AELITR Related Products

	TC14433AELITR	TC14433COGTR
Description	1-CH DUAL-SLOPE ADC, SERIAL ACCESS, PQCC28, PLASTIC, LCC-28	1-CH DUAL-SLOPE ADC, SERIAL ACCESS, PDSO24, SOIC-24
Is it lead-free?	Lead free	Lead free
Is it Rohs certified?	conform to	conform to
Maker	Microchip	Microchip
Parts packaging code	QLCC	SOIC
package instruction	PLASTIC, LCC-28	SOP, SOP24,.4
Contacts	28	24
Reach Compliance Code	compliant	compliant
ECCN code	EAR99	EAR99
Maximum analog input voltage	0.2 V	0.2 V
Converter type	ADC, DUAL-SLOPE	ADC, DUAL-SLOPE
JESD-30 code	S-PQCC-J28	R-PDSO-G24
JESD-609 code	e3	e3
length	11.505 mm	15.39 mm
Maximum linear error (EL)	0.05%	0.05%
Humidity sensitivity level	1	1
Nominal negative supply voltage	-5 V	-5 V
Number of analog input channels	1	1
Number of digits	3	3
Number of functions	1	1
Number of terminals	28	24
Maximum operating temperature	85 °C	70 °C
Output bit code	BINARY	BINARY
Output format	SERIAL	SERIAL
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	QCCJ	SOP
Encapsulate equivalent code	LDCC28,.5SQ	SOP24,.4
Package shape	SQUARE	RECTANGULAR
Package form	CHIP CARRIER	SMALL OUTLINE
Peak Reflow Temperature (Celsius)	245	260
power supply	+-5 V	+-5 V
Certification status	Not Qualified	Not Qualified
Maximum seat height	4.57 mm	2.64 mm
Nominal supply voltage	5 V	5 V
surface mount	YES	YES
technology	CMOS	CMOS
Temperature level	INDUSTRIAL	COMMERCIAL
Terminal surface	Matte Tin (Sn)	Matte Tin (Sn)
Terminal form	J BEND	GULL WING
Terminal pitch	1.27 mm	1.27 mm
Terminal location	QUAD	DUAL
Maximum time at peak reflow temperature	40	40
width	11.505 mm	7.495 mm

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