EM MICROELECTRONIC EM6415 User Manual

EM6415

Absolute Maximum Ratings

Parameter Symbol Min Max Unit

Supply Voltage

Voltage at

V

DD

V

-0.3

SS

-0.3

5.5

V

+0.3

DD

remaining pins

V

Stresses above these listed maximum ratings may cause permanent damages to the device. Exposure beyond specified operating conditions may affect device reliability or cause malfunction.

Handling Procedures

This device has built-in protection against high static

Storage temperature

T

store

-55

150

°C

voltages or electric fields; however, anti-static precautions must be taken as for any other CMOS component. Unless otherwise specified, proper operation can only occur when

Operating temperature

T

op

-40

+85

°C

all terminal voltages are kept within the voltage range. Unused inputs must always be tied to a defined logic voltage level.

Soldering

TS

MAX

250

⋅10

°C⋅s

Temperature*Time

Electrical Characteristics

Operating Conditions (unless othewise specified) Positive supply V Negative supply Ambient temperature

V

T = 25°C

Sensor resistance R

DD

SS

SEN

=3.0V =0V

= 300Ω to 10KΩ

Power Supply

Parameter Symbol Conditions Min. Typ. Max. Unit

Operating Voltage Range

Current Consumption

V

I

DD

DD1

DD2

T = -20°C to 70°C

CE =VDD at standby

CE =VSS at A/D conversion

=800kHz

f

ADOSC

2.2

100

3.0

0.2

240

3.6

1.0

300

Programmable Internal Oscillator

Parameter Symbol Conditions Min. Typ. Max. Unit

Frequency

Frequency Step Size

Stability Against Supply

f

ADOSC

∆f

ADOSC

∆f/f⋅∆V

D1,D0 = 00

2.2V< VDD <3.0V

DD

350

40

500

70

15

800

120

kHz/V

Voltage Variations

Stability Against

∆f/∆T

-20°C<T<70°C

-300

Hz/°C

Temperature Variations

V

µA

kHz

Copyright  2002, EM Microelectronic-Marin SA

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EM6415

Sensor

Parameter Symbol Conditions Min. Typ. Max. Unit

Sensor Drive Current I

SDRV

R

RSEN1

=1.0kΩ , R

SEN

=4.0kΩ,

276 300 324 Program step 0 Mode S

R

RSEN1

=1.0kΩ , R

SEN

=4.0kΩ,

468 510 552 Program step 15 Mode S

Sensor Drive Current per

I

SDRV

/stp

R

RSEN1

=1.0kΩ , R

SEN

=4.0kΩ

10 15 20

Step

Sensor Drive Current vs Voltage Deviation

Sensor Bridge

I

R

SDRV

SEN1

/V

R

RSEN1

2.2V < VDD < 3.0V

R

RSEN1

=1.0kΩ , R

=1.3kΩ , I

SEN

SDRV

=4.0kΩ

=200µA

50 200 300 ppm

2.7 3.7 4.2

Resistance1

Sensor Bridge

R

SEN2

R

RSEN2

=510Ω , I

SDRV

=500µA

1.0 1.5 2.0

Resistance2

RSEN1 Resistance R

RSEN2 Resistance R

RSEN1

RSEN2

0.3 2.5

A/D Converter

Parameter Symbol Conditions Min. Typ. Max. Unit

µA

µA/stp

kΩ

Input Voltage Range FS

Resolution

Integral Nonlinearity

Differential Nonlinearity

Conversion Time

Offset Adjust Range

FS Fine Ajust Range

V

SENS

RESADC

INLADC

DNLADC

TCONVAD

V

OFFAD

V

FSFAD

CH1,2,3,4H-CH1,2,3,4L To resolve 14 bits ADC

f

=800kHz

ADOSC

=800kHz

f

ADOSC

f

=800kHz

ADOSC

=500kHz, 14bit

f

ADOSC

12 bit FS fine adjust

16

14

-60

-12.5

4

3

110

±40

200

+60

+12.5

mV

Bits

LSB

ms

mV

%FS

Copyright  2002, EM Microelectronic-Marin SA

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EM6415

DC Characteristics

Parameter Symbol Conditions Min. Typ. Max Unit

Input Low Voltage

V

IL

ALE , RD , WR , CE , CLKP,

CLKSEL, D0-D3

Input High Voltage

V

IH

ALE , RD , WR , CE , CLKP,

CLKSEL, D0-D3

Input Low Current

I

IL

ALE , RD , WR , CE , CLKP,

CLKSEL, D0-D3

Input High Current

I

IH

ALE , RD , WR , CE , CLKP,

CLKSEL, D0 - D3

= 2mA, D0 –D3

I

Output Low Voltage

Output High Voltage

V

OL

OH

OL

= -1mA, D0 –D3

I

OH

Timing Characteristics

Data Write cycle

VDD = 3.0V, VSS = 0V, T = 25 °C, VOH = 0.8⋅VDD, VOL = 0.2⋅V

Item Symbol Min. Typ. Max. Unit

Address Set-up Time T Address Hold Time T Data Set-up Time T Data Hold Time T

ALE Pulse Width

WR Pulse Width

was

wah

wds

wdh

T

wap

T

wwp

0.8⋅V

DD

-20

1

0.1

2.4

DD

2.95

20 25 - ns 30 35 - ns 20 25 - ns 30 35 - ns

60 65 - ns

0.2⋅ V

20

0.4

DD

V

nA

V

ALE

OH

V

OL

t

wap

WR

t

was

V

OH

D0-D3

V

OL

Copyright  2002, EM Microelectronic-Marin SA

Address

V

OH

V

t

wah

OL

t

wds

t

wdp

t

wdh

V

OH

Data

V

OL

Fig. 3

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Data Read cycle

= 3.0V, VSS = 0V, T = 25 °C, VOH = 0.8⋅VDD, VOL = 0.2⋅V

V

DD

Item Symbol Min. Typ. Max. Unit

Address Set-up Time T

Address Hold Time T

Data Set-up Time T

Data Hold Time T

ALE Pulse Width

RD Pulse Width

ras

rah

rds

rdh

T

rap

T

rrp

Timing Waveforms

EM6415

DD

100 - ns

40 45 - ns

20 25 - ns

60 65 - ns

ALE

RD

D0-D3

V

OH

V

OL

t

ras

V

OH

V

OL

V

OH

t

rdp

t

rds

Address

V

OL

t

Data

rah

rdh

V

OH

V

OL

V

OH

V

OL

Fig. 4

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EM6415

Functional Description

EM6415 comprises a four channel analog multiplexer followed by a fixed gain amplifier followed by the integrator of the dual slope converter, a bandgap voltage reference, RC oscillator, power on/off detector. The sensor is supplied directly by a programmable current source.

In order to minimize noise, the analog and digital circuits internal to EM6415 use separate power supplies. These power buses are brought out to separate pins and should be tied together as close as possible to the device. In addition, the output of the internal bandgap voltage reference is brought to the pin VREF, which could allow the connection of an external capacitor to VSS, if the output stability is not enough to resolve 1µV/bit ADC.

Programming Procedure

Nibble organization and Bit order:

Bit Order

Latch Address (LAD) and Functions

LAD Function Bits D0-D3 WR/RD Note

0 FS fine adjust 0-3 WR 1 FS fine adjust 4-7 WR 2 FS fine adjust 8-11 WR 3 OS rough adjust 0-3 WR 4 OS rough adjust 4-7 WR 5 FS rough adjust 0-3 WR 6 FS rough adjust 4-7 WR 7 Bridge current 0-3 WR 8 ADC status & ADC output AD0, AD1 0-3 RD (note 1) 9 ADC output AD2-AD5 2-5 RD (note 2) 10 ADC output AD6-AD9 & T0-T3 6-9 RD (note 2) 11 ADC output AD10-AD13 & T4-T7 10-13 RD (note 2) 12 ADC resolution (10, 13, 14) 0-3 WR (note 3) 13 Perform ADC conversion (T, R, S, P) 0-3 WR (note 4) 14 Select Sensor-Port (1,2,3,4) & RSEN (1,2) 0-3 WR (note 5) 15 don’t use -

3210 high

→→

low

Note 1: ADC Status & AD0, AD1 (LAD=8)

Bit Function Note

D0 CC Conversion complete = 1 D1 COVFL Conversion overflow = 1 D2 AD0 ADC Bit 0 D3 AD1 ADC Bit 1

Note 2: ADC read out

Latch Address Buffer Bit ADC Bits Sensor AD-14 Sensor AD-13 Sens/Pow AD10 Top of B AD10

3210 3 2 1 0321032

13 12 11 10 9 8 7 6 5 4 3 2 1 0 12 11 10 9 8 7 6 5 4 3 2 1 0 -

9876 5 4 3 210---9876 5 4 3 210----

11 10 9 8

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Note 3: ADC resolution & frequency select (LAD 12)

Bit Select Function

D1, D0 00 clock 500kHz

01 clock 600kHz 10 clock 700kHz 11 clock 800kHz

D3, D2 00 10 Bit ADC

01 13 Bit ADC 10 13 Bit ADC 11 14 Bit ADC

Note 4: ADC conversion select (LAD=13)

Bit Select Function Note

D1, D0 - don’t use D3, D2 00 (T) top of sensor bridge with I

01 (R) A/D ramp height (note 7) 10 (S) sensor bridge signal I 11 (P) power supply voltage (note 9)

Note 5: ADC conversion select (LAD=14)

Bit Select Function

D0 0 RSENS1

1 RSENS2

D2, D1 00 Sensor 1 on TS1

01 Sensor 2 on TS2 10 Sensor 3 on TS3 11 Sensor 4 on TS4

D3 - Don’t use

SDRV

/2 (note 6)

SDRV

(note 8)

EM6415

Note 6: Top of sensor bridge, e.g. temperature (ToB – VSSA)

Note 7: Select ramp height if CC=0, ramp height > 1.5V

For lowest ADC jitter, chose ramp height > 1.5V. To do so, run A/D ramp height conversion and read CC (conversion complete, LAD8, Bit0). Lower the clock frequency until CC=0.

Note 8: Sensor bridge signal, e.g. pressure (CH1L – CH1H)

Note 9: Power supply voltage of EM6415 circuit

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Integrator

This signal can be seen on pin CINT

EM6415

D

8Bit

A D

OFFSET ROUGH ADJUST

A

8Bit

FS ROUGH ADJUST

min. 1.5V for 14Bit at

3V power supply

0.720V

dV2

dV1

t1 t2 t3

12Bit

D

A

14Bit ADC OUTPUT

FS FINE ADJUST

Fig. 5 Integrator ramp

Time Phase Execution

t1 Autozero phase Set up of integrator starting point t 2 FS fine adjust Signal integration with preprogrammed counter time length t2 t 3 FS rough adjust De-integration with preprogrammed reference voltage, time length of

t3 = ADC output counts

dV1 is the Offset Rough Adjust dV2 is the Integrator Ramp Length

Offsets and other system mismatch such as the zero drift of operational amplifiers, long term instabilities or supply voltage fluctuations are cancelled during the Autozero phase. Sensitivity and full-scale range adjustments are done during rampup and rampdown of the dual slope integrator.

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EM6415

Pad Description & Pin Assignment in SSOP36

PIN Nr Name I/O Description 10 TS1 Top of sensor1 bridge connection pin 11 CH1H Sensor1 channel high signal in 12 CH1L Sensor1 channel low signal in 13 TS2 Top of sensor2 bridge connection pin 14 CH2H Sensor2 channel high signal in 15 CH2L Sensor2 channel low signal in 16 TS3 Top of sensor3 bridge connection pin 17 CH3H Sensor3 channel high signal in 18 CH3L Sensor3 channel low signal in 19 TS4 Top of sensor4 bridge connection pin 20 CH4H Sensor4 channel high signal in 21 CH4L Sensor4 channel low signal in 2 D0P I/O Microprocessor Port Data 0 1 D1P I/O Microprocessor Port Data 1 36 D2P I/O Microprocessor Port Data 2 35 D3P I/O Microprocessor Port Data 3 31

32

33

34 22 CINT Connection to integrator capacitor

23 AZN Connection to auto-zero capacitor 24 P3WAY 3 way connection for integrator 25 RINT13_14 Connection of resistor for integrator 26 RINT10 Connection of resistor for integrator when 10 bit conversion used 8 RSEN1 Resistor to select sensor bridge1 maximum drive current 9 RSEN2 Resistor to select sensor bridge2 maximum drive current 3 CLKP I External clock input 5 CLKSEL I Internal/external clock select 6 VDDD Positive supply voltage of digital part 7 VDDA Positive supply voltage of analog part 29 VSSA Negative supply voltage of analog part 30 VSSD Negative supply voltage of digital part 27 VREF O Reference voltage 4, 28 NC Not connected

RD

ALE

CE

WR

I Read strobe for BUS read (active low) I Address latch enable (active low)

I Chip enable (active low)

I Write strobe for BUS write (active low)

I: Input O: Output

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Package Information

SSOP36 – 300 mils

EM6415

Symbol Common dimensions (inches) Note Symbol Common dimensions (mm) Note

Min Nom Max Min. Nom Max

A 0.097 0.101 0.104 A 2.46 2.56 2.64 A1 0.0050 0.009 0.0115 A1 0.127 0.22 0.29 A2 0.090 0.092 0.094 A2 2.29 2.34 2.39

B 0.012 0.014 0.017 B 0.31 0.36 0.43

C 0.0091 0.010 0.0125 C 0.23 0.25 0.32

D 0.602 0.607 0.612 D 15.29 15.42 15.54

E 0.292 0.296 0.299 E 7.42 7.52 7.59

e 0.0315

BSC H 0.400 0.406 0.410 H 10.16 10.31 10.41 h 0.010 0.013 0.016 h 0.25 0.33 0.41 L 0.024 0.032 0.040 L 0.61 0.81 1.02 X 0.085 0.093 0.100 X 2.16 2.36 2.54

α

0° 5° 8°

e0.80

BSC

α

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0° 5° 8°

EM6415

Ordering Information

The EM6415 has metal mask options for the Gain of the Input Amplifier (between 1 and 150 max) and for the Offset Adjust Range. Contact EM Microelectronic for availability of different options not shown in table below. Please make sure to order the exact Part Number when ordering.

Part Number Version

EM6415V1WS11 EM6415V1SS36A EM6415V1SS36B EM6415V2WS11 EM6415V2SS36A EM6415V2SS36B EM6415V3WS11 EM6415V3SS36A EM6415V3SS36B EM6415V%WS11 EM6415V%SS36A EM6415V%SS36B

V1 5 Separate Registers -40mV to +40mV 36-pin SSOP, Stick

V2 5 Common Registers -40mV to +40mV 36-pin SSOP, Stick

V3 150 Separate Registers -40mV to +40mV 36-pin SSOP, Stick

V% custom custom custom 36-pin SSOP, Stick

Input

Amplifier

Gain

OS/FS Rough Adjust

(note 1)

for each sensor 36 pin SSOP, Tape & Reel

for the 4 sensors 36 pin SSOP, Tape & Reel

for each sensor 36 pin SSOP, Tape & Reel

Offset Adjust

Range

Delivery Form

Sawn wafer, 11 mils thickness

36 pin SSOP, Tape & Reel

Note 1: LAD 3, 4, 5, 6

For die size information and pad location diagram, please contact EM Microelectronic-Marin SA.

EM Microelectronic-Marin SA cannot assume responsibility for use of any circuitry described other than circuitry entirely embodied in an EM Microelectronic-Marin SA product. EM Microelectronic-Marin SA reserves the right to change the circuitry and specifications without notice at any time. You are strongly urged to ensure that the information given has not been superseded by a more up-to-date version.

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EM MICROELECTRONIC EM6415 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual