Datasheet SA5775N Datasheet (Philips)

INTEGRATED CIRCUITS

SA5775A

Differential air core meter driver

Product specification
Supersedes data of 1997 Feb 24

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1999 Sep 20

Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

DESCRIPTION

The SA5775A is a monolithic driver for controlling air-core (or
differential) meters typically used in automotive instrument cluster
applications. The circuit interfaces with a microprocessor through a
serial bus and directly drives the air-core meter. The SA5775A has
10-bit resolution (0.35 degree) and is guaranteed to be monotonic.
Data can be shifted through the part, allowing several SA5775As to
be cascaded with only one chip-select line. On-chip current shut
down logic protects the circuit from external faults.

FEATURES

•10-Bit resolution (0.35 degrees)

•Exceptional accuracy (0.25 degrees, typical)

•High-torque capability

•Active differential drivers eliminate back-EMF issues

•No RFI/EMI generation issues

•Simple serial interface

•Simple cascading capability for multiple meters

•Internal fault protection

•Only one external component required (bypass capacitor)

APPLICATION

•Instrumentation utilizing air-core meters

PIN CONFIGURATION

1

SIN-

SIN+

2

A

3

GND

4

V

IGN

DATA

DATA

DATA

5

OUT

6

IN

V

7

CC

89

OE

SIN-

1
2

SIN+

3

NC
NC

4
5

NC

6

A

GND

7

V

IGN

8

OUT

9

DATA

IN

10

NC
NC NC

11
12

NC NC

13

V

CC

OE

14

Figure 1. Pin configuration

N Package

D Package

16

COS+

15

COS-

A

14

GND

13

D

GND

12

nc

11

ST

10

CS

S

CLK

COS+

28
27

COS-

NC

26
25

NC

24

NC

23

A

GND

NC

22

NC

21
20

D

GND

19

ST

18
17
16

CS

15

S

CLK

SL00453

ORDERING INFORMATION

DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #

16-Pin Plastic Dual In-Line Package (DIP)
28-Pin Small Outline Package (SO)

1999 Sep 20 853-1929 022369

2

-40 to +85°C

-40 to +85°C

SA5775AN SOT38-4
SA5775AD SOT136-1

Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

BLOCK DIAGRAM

4576 3

2

8
9

10

LOGIC

3

1

16

DAC MUX

11

12 13 14

SHUT–DOWN

LOGIC

15

SL00454

Figure 2. Block diagram

Table 1. SA5775A Pin Descriptions for the N Package (Dual In-Line)

Pin # Name Function

1. SIN– Negative output connection to the SIN coil of the gauge.

2. SIN+ Positive output connection to the SIN coil of the gauge.

3. A

4. V

5. DATA

6. DATAINSerial data input. A new data word is serially shifted into the part on the rising edge of S

7. V

8. OE Output drivers are turned off when this input is low. Current draw is minimized.

9. S

10. CS Active high chip select input. When CS is high, the part is enabled to receive a new serial input word. The high-to-low tran-

11. ST Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted out-

12. nc Not connected

13. D

14. A

15. COS– Negative output connection to the COS coil of the gauge.

16. COS+ Positive output connection to the COS coil of the gauge.

Ground for V

GND

Analog supply. Nominally 14.0 V.

BB

Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the

OUT

DATA

OUT

5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal.

CC

Serial clock input. Data is loaded into the part on the rising edge of S

CLK

supply. Pins 3, 13 and 14 connected on the circuit board.

IGN

pin.

CLK

. The data is shifted in MSB first.

CLK

.

sition of CS loads the new 10-bit word into the DAC registers and updates the output.

puts, over temperature conditions, power up reset, or output enable control pin .This output is an open drain output .Multiple
status outputs may be wire OR’ed together .This output is low when the outputs are disabled due to a fault condition.

Ground for VCC supply. Connect to Pins 3 and 14.

GND

Ground for VBB supply. Connect to Pins 3 and 13.

GND

1999 Sep 20

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Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

Table 2. SA5775A Pin Descriptions for the D Package (Small Outline)

Pin # Name Function

1. SIN– Negative output connection to the SIN coil of the gauge.

2. SIN+ Positive output connection to the SIN coil of the gauge.

3. NC No connect

4. NC No connect

5. NC No connect

6. A

GND

7. V

8. DATA

9. DAT AINSerial data input. A new data word is serially shifted into the part on the rising edge of S

10. NC No connect

11. NC No connect

12. NC No connect

13. V

14. OE Output drivers are turned off when this input is low. Current draw is minimized.

15. S

16. CS

17. NC No connect

18. NC No connect

19. ST

20. D

21. NC No connect

22. NC No connect

23. A

GND

24. NC No connect

25. NC No connect

26. NC No connect

27. COS– Negative output connection to the COS coil of the gauge.

28. COS+ Positive output connection to the COS coil of the gauge.

Ground for V
Analog supply. Nominally 14.0V.

IGN

Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the

OUT

DATA

OUT

5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal.

CC

Serial clock input. Data is loaded into the part on the rising edge of S

CLK

supply. Pins 6, 20 and 23 connected on the circuit board.

IGN

pin.

CLK

. The data is shifted in MSB first.

CLK

.

Active high chip select input. When CS is high, the part is enabled to receive a new serial input word. The high-to-low
transition of CS loads the new 10-bit word into the DAC registers and updates the output.

Status output from this IC to indicate that the outputs have been disabled. The outputs may be disabled due to shorted out­puts, over temperature conditions, power up reset, or output enable control pin. This output is an open drain output. Multiple
status outputs may be wire OR’ed together. This output is low when the outputs are disabled due to a fault condition.

Ground for VCC supply. Connect to Pins 6 and 23.

GND

Ground for VBB supply. Connect to Pins 6 and 20.

ABSOLUTE MAXIMUM RATINGS

SYMBOL PARAMETER RATING UNIT

V

IGN

V

CC

D

to A

V
P

T
T

θ

GND
IN

D

A

J

JA

GND

NOTE:

1. For power dissipation ratings in still air, derate above 25°C at the following rates:

1999 Sep 20

Analog supply -1 to +23 V
Digital supply -1 to +6 V
Ground difference -0.3 to +0.3 V
Digital input voltage, Data In, OE, CS, S
Power dissipation (TA = 25°C)

1

CLK

-1 to +7 V

D and N packages 1500
Ambient operating temperature –40 to +85
Junction temperature 150
DIP and SO packages 90

D and N packages at 12mW/°C

4

mW

°C
°C

°C/W

Philips Semiconductors Product specification

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

SA5775ADifferential air-core meter driver

DC ELECTRICAL CHARACTERISTICS

V

= 7.5 to 18 V; VCC = 4.5 to 5.5 V; TA = –40 to +85°C.

IGN

LIMITS

MIN TYP MAX

V

IGN

I

IGN

I

CC

V

OH

V

OL

VOL Status IOL = 2.8 mA 0.8 V
IOH Status ST, VCC = 5 V 25 µA
V

IH

V

IL

I

IH

I

IL

A

CC

I

SD

V

DRIVE

R

LMIN

NOTE:

1. See Test Circuit.

2. Maximum current is when output is 45 degrees; T

3. See Table “Output function accuracy”

Ignition supply voltage 7.5 18 V

Ignition supply current

= 18 V no load

IGN

VBB = 18 V with load
RLC, RLS = R

LMIN

1,2

25

mA

160

V

Logic supply current VCC = 5.5 V 1 mA
Output high voltage Data out IOH = 300 µA VCC – 0.8
Output low voltage Data out IOL = 1.5 mA 0.4 V

Input high voltage CS, S
Input low voltage CS, S
Input high current CS, S
Input low current CS, S
Output function accuracy

3

CLK
CLK

RLC, RLS = R

, DATA

CLK
CLK

, DATA

IN
IN

, DATAIN, VIN = 0.7 x V
, DATAIN, VIN = 0.3 x V

LMIN

CC
CC

0.7 x V

CC

0.3 x V

CC

10 µA
10 µA

–0.5 0.5 Degree

V
V

Output shut-down current COS+, COS–, SIN+, SIN–

Coil drive voltage

Minimum load resistance

I

SINK

I

SOURCEVIGN

= –40°C, and RL = 138 Ω.

A

V

= V

IGN

V

= V

IGN

= V

V

= V

IGN

V

= V

IGN

V

= V

IGN

TA = 85°C
TA = 25°C

TA = –40°C

IGN (MAX)
IGN (MIN)
IGN (MAX)
IGN (MIN)

IGN (MAX)

IGN (MIN)

97
43
85
43

500
300
500
300

68 78 %V

215
171
138

mA
mA
mA
mA

Ω
Ω
Ω

IGN

Table 3. Output function accuracy

Ideal Nominal Input Code

0 0.176 0
45 45.176 128
90 90.176 256

135 135.176 384
180 180.176 512
225 225.176 640
270 270.176 768
360 359.820 1023

Equation for Output Angle (θ) vs Output Voltage

Quadrant Equation

I θ = tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] |

II θ = 180° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] |

III θ = 180° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] |

IV θ = 360° +tan–1 | [(SIN+) – (SIN–)] / [(COS+) – (COS–)] |

N = Binary Input Code

1999 Sep 20

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Philips Semiconductors Product specification

SYMBOL

PARAMETER

TEST CONDITIONS

UNIT

SA5775ADifferential air-core meter driver

AC ELECTRICAL CHARACTERISTICS

VDD = 7.5 to 18 V; VCC = 4.5 to 5.5 V; TA = –40 to +85°C

LIMITS

MIN TYP MAX

FS

CLK

TS

CLKH

TS

CLKL

TRO Output rise time DO 0.75 to VCC –1.2 V, CL = 90 pF 75 ns
TFO Output fall time DO VCC –1.2 V to 0.75, CL = 90 pF 75 ns
TSU DI set-up time 75 ns
THI DI hold time 75 ns

TYPICAL APPLICATION

Input frequency 1.6 MHz
S

high time 175 ns

CLK

S

low time VCC = 5.5 V 175 ns

CLK

METER

14V

MICROPROCESSOR

SCLK

SCLK

FROM

5

DATA

OUT

9

DATA

IN

6

S

CLK

SA5775A

SGD

OE

Figure 3. Typical application

FSCLKL

TSCLKL

Tr Tf

V

5V

CC

78

COS+COS–SIN+SIN–

V

D
A

TSCLKH

161521

DO

IGN

NC

ST

GND
GND

Data Out

5
4

12

µ

F

10

11
13
14

SL00455

1999 Sep 20

CS

DO

DI

BIT9 BIT8..1 BIT0

T

SUTHI

BIT0

PREVIOUS WORD

SL00456

Figure 4. Serial interface timing

6

Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

1
2
3
4
5
6
7
8

16
15
14
13
12

11

10

9

SL00457

Figure 5. SA5775A Test circuit, N package

15

COS

10

5

0

0 127 255 383 511 639 767 895 1023

DIFFERENTIAL VOLTAGE

–5

SIN

–10

–15

Figure 6. SA5775A output voltages (V

0.8

0.6

0.4

0.2

0.0

ERROR (DEGREES)

–0.2

–0.4

–0.6

–0.8

0 127 255 383 511 639 767 895 1023

INPUT CODE

INPUT CODE

IGN

= 14 V)

VBB = 14V
RL = 200Ω

T = 25

Figure 7. Error graph

SL00458

SL00459

1999 Sep 20

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Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4

1999 Sep 20

8

Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

SO28: plastic small outline package; 28 leads; body width 7.5mm SOT136-1

1999 Sep 20

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Philips Semiconductors Product specification

SA5775ADifferential air-core meter driver

Data sheet status

Data sheet
status

Objective
specification

Preliminary
specification

Product
specification

Product
status

Development

Qualification

Production

Definition

This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make changes at any time without notice in order to
improve design and supply the best possible product.

This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.

[1]

[1] Please consult the most recently issued datasheet before initiating or completing a design.

Definitions

Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For

detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one

or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may affect device reliability.

Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.

Disclaimers

Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can

reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.

Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.

Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone [phone]

 Copyright Philips Electronics North America Corporation 1999

All rights reserved. Printed in U.S.A.

Date of release: 09-99

Document order number: 9397 750 06445

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1999 Sep 20

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