Microchip Technology TC534CPL, TC534CKW, TC530CPJ, TC530COI Datasheet

TC530/TC534

5V Precision Data Acquisition Subsystems

Features

• Precision (up to 17-Bits) A/D Converter

•3-WireSerialPort

• Flexible:User Can TradeOff Conversion Speed For
Resolution

• Single Supply Operation

•-5VOutputPin

• 4 Input, Differential Analog MUX (TC534)

• Automatic Input Polarity and Overrange Detection

• Low Operating Current: 5mA Max

• Wide Analog Input Range: ±4.2V Max

• Cost Effective

Applications

• Precision Analog Signal Processor

• PrecisionSensor Interface

• High Accuracy DC Measurements

Device Selection Table

Part Number Package

TC530COI 28-PinSOIC 0°C to +70°C
TC530CPJ 28-PinPDIP(Narrow) 0°C to +70°C
TC534CKW 44-PinPQFP 0°C to +70°C
TC534CPL 40-Pin PDIP 0°C to +70°C

Temperature

Range

Package Types

ACOM

C

V

OSC

V

SS

C

INT

C

AZ

BUF

ACOM

C

REF

C

REF

V

REF

V

REF

CH4-

CH3-

CH2-

CH1-

CH4+

CH3+

CH2+

CH1+

DGND

A1

A0

V

C

C

BUF

C

REF

REF

V

REF

REF

VIN-

V

DGND

N/C

OUT

-

+

-

+

SS

INT

AZ

IN

10

11

12

13

14

15

16

17

18

19

20

28-Pin SOIC
28-Pin PDIP

1

2

3

4

5

-

6

TC530CPI

+

7

TC530COI

-

8

+

9

10

+

11

12

13

14

40-Pin PDIP

1

2

3

4

5

6

7

8

9

TC534CPL

28

27

26

25

24

23

22

21

20

19

18

17

16

15

CAP-

AGND

CAP+

V

NC

OSC

V

RESET

EOC

R/W

D

D

D

OSC

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

DD

CCD

IN

CLK

OUT

CAP-

AGND

CAP+

V

N/C

N/C

OSC

N/C

V

N/C

RESET

N/C

N/C

EOC

R/W

D

D

D

OSC

OSC

IN

DD

CCD

IN

CLK

OUT

IN

OUT

44-Pin PQFP

INT

A1

DGND

CAP-

NC

394041424344

38 37 36 35 34

A0

NC

BUF

CAZVSSC

1

NC

2

ACOM

C

-

3

REF

C

+

4

REF

V

-

5

REF

V

+

6

REF

7

CH4-

CH3-

8

CH2-

9

CH1-

10

CH4+

11

12 13 14 15 16 17 18 19 20 21 22

CH3+



2002 Microchip TechnologyInc. DS21433B-page 1

CH2+

TC534CKW

CH1+

OUT

OSC

AGND

IN

OSC

CAP+

OUT

D

DD

NC

V

NC

33

OSC

32

NC

31

V

30

CDD

NC

29

RESET

28

NC

27

26

NC

NC

25

24

EOC

23

R/W

IN

D

CLK

D

TC530/TC534

p

General Description

The TC530/TC534 are serial analog data acquisition
subsystems ideal for high precisionmeasurements(up
to 17-bits plus sign). The TC530 consists of a dual
slope integrating A/D converter, negative power sup­ply generator and 3 wire serial interface port. The
TC534 is identical to the TC530, but adds a four chan­nel differential input multiplexer. Key A/D converter
operating parameters (Auto Zero and Integration time)
are programmable, allowing the user to trade
conversion time for resolution.

Data conversion is initiated when the RESET input is
brought low. After conversion, data is loaded into the
output shift register and EOC

is asserted, indicating

Typical Application

C

(TC530 Only)

TC534

(Only)

VIN-

VIN+

CH1+

CH1-

CH2+

CH2-

CH3+

CH3-

CH4+

CH4-

+5V

DIF.

MUX

(TC534

Only)

V

DD

R

TC530
TC534

INT

BUF

IN+
IN-

DC-TO-DC

C

AZ

V

DD

Converter

INT

C

AZ

INT

new data is available. The converted data (plus Over­range and polarity bits) is held in the output shift regis­ter until read by the processor or until the next
conversion is completed, allowing the user to access
data at any time.

The TC530/TC534 timebase can be der ived from an
external crystal of 2MHz (max) or from an external fre­quencysource.TheTC530/TC534requiresasingle5V
power supply and features a -5V, 10mA output which
can be used to supply negative bias to other
components in the system.

V

MCP1525

DD

C

REF

C

+

REF

CMPTR

-

AB

State

Machine

Oscillator

(÷ 4)

C

REF

Dual Slope A/D Converter

100k

REF

.01µF

+

V

-V

REF

Serial Port

ACOM

0.01µF

RESET

EOC

R/W

D

IN

D

OUT

D

CLK

V

DD

Optional
Power-On
Reset Ca

A0 A1

OSC

CAP+

CAP–

V

SS

OSC

Negative
Supply Output

OSC

IN

OUT

DS21433B-page 2



2002 Microchip TechnologyInc.

TC530/TC534

1.0 ELECTRICAL

CHARACTERISTICS

*Stresses above those listed under "Absolute Maximum Rat­ings"maycause permanentdamage to thedevice.These are
stress ratings only and functional operation of the device at
these or any other conditions above those indicated in the

Absolute Maximum Ratings*

Supply Voltage ......................................................+6V

Analog Input Voltage(V

+orVIN-).............VDDtoV

IN

SS

operation sections of the specifications is not implied. Expo­sure to Absolute Maximum Rating conditions for extended
periodsmay affectdevice reliability.

Logic Input Voltage.........(VDD+ 0.3V) to (GND - 0.3V)

Ambient Operating Temperature Range:

PDIP Package (C)................. 0°C to +70°C

SOIC Package (C) ................ 0°C to +70°C

PQFP Package (C) ............... 0°C to +70°C

StorageTemperature Range..............-65°C to +150°C

TC530/TC530A/T C534 ELECTRICAL SPECIFICATIONS

Electrical Characteristics: VDD=V

CCD,CAZ=CREF

Symbol Parameter

Min Typ Max Min Typ Max

Analog Power Supply Voltage 4.5 5.0 5.5 4.5 — 5.5 V

V

DD

V

Digital Power Supply Voltage 4.5 5.0 5.5 4.5 — 5.5 V

CCD

TC530/TC534 Total Power

P

D

Dissipation
Supply Current (VS+PIN)—1.82.5——3.0mA

I

S

I

CCD

Supply Current (V

)——1.5 ——1.7mAF

CCDPIN

——25 — ——mΩ VDD=V

Analog

R Resolution — — ±17 — — ±17 Bits Note 1

ZSE Zero Scale Error with Auto

— — 0.5 — 0.005 0.012 % F.S.

ZeroPhase

ENL End Point Linearity — 0.015 0.030 — 0.015 0.045 % F.S. Note 1 and

NL Max. Deviation from Best

— 0.008 0.015 — — — % F.S. Note 1 and

Straight Line Fit

ZS

Zero Scale Temperature

TC

Coefficient

——— — 1 2µV/°C

SYE Rollover Error — .012 — — .03 — %F.S. Note 3

FS

V

V

Full Scale Temperature

TC

Coefficient
Input Current — 6 — — — — pA VIN=0V

I

IN

Common-Mode Voltage

CMR

Range
Integrator Output Swing VSS+0.9 — VDD-0.9 VSS+0.9 — VDD-0.9 V

V

INT

Analog Input Signal Range VSS+1.5 — VDD-1.5 VSS+1.5 — VDD-1.5 V

V

IN

VoltageReference Range VSS+1 — VDD-1 VDD+1 — VDD-1 V

REF

Zero Crossing

T

D

Comparator Delay

— — — — 10 — ppm/°CExt. V

VSS+1.5 — VDD-1.5 VSS+1.5 — VDD-1.5 V

—2.0— — 3.0—µsec

Note 1: Integrate time ≥ 66msec, Auto Zero time ≥ 66msec, V

2: End point linearity at ±1/4, ±1/2 ±3/4, F.S. after full scale adjustment.
3: Rollover error is relatedto capacitor used for C
4: TC534 Only.

=0.47µF, unless otherwise specified.

=+25°C TA=0°Cto+70°C

T

A

(pk) = 4V.

INT

. See Table 5-2, Recommended Capacitor for C

INT

Unit Test Conditions

OSC

Note 2

Note 2

T.C. = 0ppm/°C

.

INT

CCD

=1MHz

REF

=5V



2002 Microchip TechnologyInc. DS21433B-page 3

TC530/TC534

TC530/TC530A/T C534 ELECTRICAL SPECIFICATIONS (CONTINUED)

Electrical Characteristics: VDD=V

Symbol Parameter

CCD,CAZ=CREF

=0.47µF , unless otherwise specified.

=+25°C TA=0°Cto+70°C

T

A

Min Typ Max Min Typ Max

Serial Port Interface

V

Input LogicHIGHLevel 2.5 — — 2.5 — — V

IH

Input LogicLOW Level — — 0.8 — — 0.8 V

V

IL

I

IN

V

OL

T

R,TF

F

XTL

F

EXT

T

RS

T

RD

T

DRSDCLK

T

PWLDCLK

T

PWHDCLK

T

DR

R

OUT

F

CLK

I

OUTVSS

Input Current
(DI, DO, D

CLK

)

LogicLOW Output Voltage
(EOC

)

Rise and Fall Times
(EOC

,DI,DO)
Crystal Frequency — — 2.0 — —2.0MHz
External Frequency on OSC
Read Setup Time 1 — — — 1 — µsec
Read Delay Time 250 — — — 250 nsec

to D

Delay 450 — — — 450 nsec

OUT

LOW Pulse Width 150 — — — 150 nsec

HIGH Pulse Width 150 — — — 150 nsec
Data Ready Delay 200 — — — 200 nsec
OutputResistance — 65 85 — — 100 Ω I
Oscillator Frequency — 100 — — — — kHz C

Output Current — — 10 — — 10 mA

——10 — — — µA

— 0.2 0.3 — — 0.35 V I

——250 — 250 nsecC

——4.0 — —4.0MHz

IN

Multiplexer

V

R

MaximumInputVoltage -2.5 — 2.5 -2.5 — 2.5 V

IMMAX

Drain/Source ON Resistance — 6 10 — — — kΩ

DSON

Note 1: Integrate time ≥ 66msec, Auto Zero time ≥ 66msec, V

2: End point linearity at ±1/4, ±1/2 ±3/4, F.S. after full scale adjustment.
3: Rollover error is relatedto capacitor used for C
4: TC534 Only.

. See Table 5-2, Recommended Capacitor for C

INT

(pk) = 4V.

INT

Unit Test Conditions

=250µA

OUT

=10pF

L

=10mA

OUT

=0

OSC

.

INT

DS21433B-page 4



2002 Microchip TechnologyInc.

TC530/TC534

2.0 PIN DESCRIPTIONS

ThedescriptionsofthepinsarelistedinTable2-1

TABLE 2-1: PIN FUNCTION TABLE

Pin Number

(TC530)

28-Pin PDIP

Pin Number

(TC530)

28-Pin SOIC

Pin Number

(TC534)

40-PinPDIP

11 140V

22 241C

33 342C
4 4 4 43 BUF Analog output. Integrator capacitor connection and voltage

5 5 5 2 ACOM Analog input. This pin is ground for all of the analog

66 6 3C
77 7 4C
88 8 5V

99 9 6V

Not Used Not Used 10 7 CH4- A nalog Input. Multiplexer channel4 negative differential
Not Used Not Used 11 8 CH3- Analog Input. Multiplexer channel3 negative differential
Not Used Not Used 12 9 CH2- A nalog Input. Multiplexer channel2 negative differential
Not Used Not Used 13 10 CH1- AnalogInput. Multiplexer channel 1 negativedifferential
Not Used Not Used 14 11 CH4+ AnalogInput. Multiplexer channel 4 positivedifferential
Not Used Not Used 15 12 CH3+ AnalogInput. Multiplexer channel 3 positivedifferential
Not Used Not Used 16 13 CH2+ AnalogInput. Multiplexer channel 2 positivedifferential
Not Used Not Used 17 14 CH1+ AnalogInput. Multiplexer channel 1 positivedifferential

10 10 Not Used Not Used V
11 11 Not Used Not Used V

12 12 18 15 DGND Analog Input. Groundconnection for serial portcircuit.
Not Used Not Used 19 16 A1 Logic LevelInput. Multiplexeraddress MSB.
Not Used Not Used 20 17 A0 LogicLevelInput. Multiplexeraddress LSB.

14 14 21 18 OSC

15 15 22 19 OSC

Pin Number

(TC534)

44-Pin

PQFP

Symbol Description

Analog output. Negative power supply converter output and

SS

reservoir capacitorconnection.Thisoutput can be used to
providenegative bias to other devices in the system.

Analog output. Integrator capacitor connection and

INT

integrator output.
Analog input. Auto Zero capacitor connection.

AZ

buffer output.

switchesin the A/D converter. It is grounded for most
applications.ACOM and theinputcommonpin (V
CHX-) should be within the common mode range, CMR.

- A nalog Input. Reference cap negative connection.

REF

+ Analog Input. Reference cap positive connection.

REF

- Analog Input. External voltage reference negative connec-

REF

tion.

+ Analog Input. External voltage reference positive connec-

REF

tion.

- Analog Input. Negative differential analog voltage input.

N

+ Analog Input. Positive differential analog voltage input.

IN

AnalogInput.Timebaseforstatemachine. This pin con-

OUT

nects to one side of an AT-cut crystal havingan effective
seriesresistanceof100Ω (typ)andaparallelcapacitanceof
20pF.If an external frequency source is used to clockthe
TC530/TC534 this pin must be left floating.

Analog Input. This pin connects to the other side of the crys-

IN

tal described in OSC
also be clocked from an external frequencysource con-

above.The TC530/TC534may

OUT

nectedto this pin. The externalf requency sourcemustbe a
pulse waveformwitha minimum30% duty cycleand rise
and fall times 15nsec (Max). If an external frequency source
is used, OSC
ing frequencyof 2MHz (crystal) or 4MHz (external clock

must be left floating. A maximum operat-

OUT

source) is permitted.

-or

IN



2002 Microchip TechnologyInc. DS21433B-page 5

TC530/TC534

TABLE 2-1: PIN FUNCTION TABLE (CONTINUED)

Pin Number

(TC530)

28-Pin PDIP

Pin Number

(TC530)

28-Pin SOIC

Pin Number

(TC534)

40-PinPDIP

16 16 23 20 D

17 17 24 21 D

18 18 25 22 D

19 19 26 23 R/W

20 20 27 24 EOC

21 21 30 28 RESET Logic Level Input. It is necessary to force the TC530/TC534

22 22 32 30 V

23 23 34 32 OSC Input. The negative power supply converter normally runs at

25 25 37 35 V

Pin Number

(TC534)

44-Pin

PQFP

Symbol Description

LogicLevelOutput. Serial port dataoutputpin. This pinis

OUT

enabled only when R/W
LogicInput, Positive and NegativeEdgeTriggered.S erial

CLK

portclock.WhenR/W
the TC530/TC534A (on D
of D

. A/D initialization data (LOAD VALUE) is clocked

CLK

intothe TC530/TC534(onD
tion of D
3MHz is permitted.

LogicLevelInput. Serial port inputpin.The A/D converter

IN

integration time (T

.AmaximumserialportD

CLK

is high.

is high, serialdata is clocked out of

) at each high-to-low transition

OUT

) at each low-to-hightransi-

IN

) and Auto Zero time (TAZ) values are

INT

determined by the LOAD VALUE byte clockedintothispin.
This initializationmust takeplace at powerup, and can be
rewritten (or modified and rewritten) at any time. The LOAD
VALUE is clocked into D

MSB first.

IN

LogicLevel Input.This pin mustbebrought lowtoperform a
write to the serial port (e.g. initialize the A/D converter). The
D

pin of the serial port is enabled only when this pin is

OUT

high.
Open Drain Output. End-of-Conversion (EOC)isasserted

any time the TC530/TC534 is in the AZ phase of conver­sion. Thisoccurs when either the TC530/TC534 initiatesa
normal AZ phase or when RESET is pulled high. EOC
returned high when the TC530/TC534 exits AZ. Since EOC
is driven low immediately followingcompletionof a conver­sion cycle, it can be u sed as a DATA READY processor
interrupt.

into the Auto Zero phase when power is initially applied.
This is accomplished by momentarilytaking RESET high.
Using an I/O port line from themicroprocessoror by apply­ing an external system resetsignalorby connectinga

0.01µF capacitor from the RESET input to V
sions are performed continuously as long as RESET is low
and conversion is halted when RESET is high. RESET may
therefore be used in a complex system to momentarily sus­pend conversion (for example, while the address lines of an
input multiplexer are changing state). In this case, RESET
should be pulledhigh onlywhen the EOC
excessively long integrator discharge times which could
resultin erroneous conversion. (See ApplicationsSection).

AnalogInput.Power supply connection for digital logicand

CCD

serialport.Proper power-up sequencing is critical,seethe
Applicationssection.

a frequencyof 100kHz. This frequency can be sloweddown
to reduce quiescent current by connecting an external
capacitor between this pin and V

+

See Section6.0,Typical Characteristics.
AnalogInput.Power supply connection for the A/D analog

DD

section and DC-DC converter.Properpower-up sequencing
is critical, (See the Applications section).

CLK

DD.

frequency of

DD

is LOW to avoid

is

.Conver-

DS21433B-page 6



2002 Microchip TechnologyInc.

TC530/TC534

TABLE 2-1: PIN FUNCTION TABLE (CONTINUED)

Pin Number

(TC530)

28-Pin PDIP

26 26 38 36 CAP+ AnalogInput. Storagecapacitorpositive connectionforthe

27 27 39 37 AGND AnalogInput.Ground connection for DC/DC converter.

28 28 40 38 CAP- AnalogInput. Storage capacitor negative connection for the

13, 24 13, 24 28, 29, 31,

Pin Number

(TC530)

28-Pin SOIC

Pin Number

(TC534)

40-PinPDIP

33, 35, 36

Pin Number

(TC534)

44-Pin

PQFP

1, 25, 26, 27,

29, 31, 33,

34, 39, 44

Symbol Description

DC/DC converter.

DC/DC converter.

NC No connect.Do not connect any signal to these pins.



2002 Microchip TechnologyInc. DS21433B-page 7