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參數(shù)資料
| 型號： | SA5778D |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 其它接口 |
| 英文描述： | Serial triple gauge driver STGD |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PDSO28 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 122K |
| 代理商： | SA5778D |
Philips Semiconductors
Product specification
SA5778
Serial triple gauge driver (STGD)
1998 Apr 03
5
ADDITIONAL GAUGE
DRIVERS; SA5775A
OR SA5777A
PROTECTED BY
SA5778
MICRO–
CONTROLLER
SERIAL
GOE
RUN
IGNITION
SA5778
SERIAL
TRIPLE
GAUGE
DRIVER
4
2
2
V
BATT
SR01118
AU5780
J1850 VPW
TRANSCEIVER
80C51
J1850
PROTOCOL
CONTROLLER
J1850 BUS
360
°
MAJOR
GAUGE
112
°
MINOR
GAUGE
Figure 3.
System Connections for the STGD
FUNCTIONAL DESCRIPTION
Figure 1 shows the pin-out of the STGD, which is packaged in an
SO-28 pin package, enhanced for improved thermal management.
Four pins on each side of the package serve as a heat spreader to
remove heat from the die, and also function as the ground
connection. The recommended mounting includes an area of copper
on the PC board to aid in thermal management.
Figure 2 is a block diagram of the STGD. A serial interface connects
the STGD to the microcontroller. A data output pin is provided to
permit the STGD to be wired in series with other Philips air core
gauge drivers such as the Serial Gauge Driver, SA5775, and the
Dual Gauge Driver, SA5777 or additional STGDs. Status information
may be passed back to the microcontroller via a status output, or via
the serial interface.
Figure 3 shows the connection of the STGD in a typical application.
APPLICATION INFORMATION
Figure 4 demonstrates the connections between the STGD, the
microcontroller, and optionally additional gauge drivers such as the
SGD and DGD. With an active high on the chip select input (CS),
data is shifted into the STGD through DATA
IN
on the rising edge of
S
CLK
. Several gauge drivers may be wired in series using a
common chip select and clock line, when more than three gauges
are needed. The DATA
OUT
pins are cascaded to the DATA
IN
pins of
the following gauge drivers. Status information can be returned to
the microcontroller via the ST pins of each gauge driver. These are
open-drain, active low outputs, which may be wire OR’ed together to
signal that a fault, such as a thermal shut down, has occurred within
one of the gauge drivers. This pin may be connected to a
microcontroller port pin for polling in software, or may be connected
to an external interrupt input to cause entry into an interrupt service
routine. The STGD, may also pass status information back to the
microcontroller serially. The rising edge of chip select loads status
information into the shift register for the first four bits that will be
shifted out of the STGD by the shift clock. Figure 11 shows the data
bits within the shift register. A low on the ST pin signals that one or
more status bits have been set in the status register. A high
indicates all status bits are reset. The status output bits include
minor gauge over current, major gauge over current, thermal
shutdown and RUN. Gauge data is captured in latches by the falling
edge of the chip select.
SA5778 SERIAL
TRIPLE
GAUGE DRIVER
ADDITIONAL
GAUGE DRIVER(S),
SA5775A,
SA5777A OR
SA5778
DATA
IN
S
CLK
CS
DATA
OUT
ST
DATA
IN
S
CLK
CS
DATA
OUT
ST
DATA
OUT
S
CLK
PORT N
DATA
IN
INT
5V
MICRO-
CONTROLLER
SR01119
Figure 4.
Serial Communications Between STGD,
Microcontroller and Other Gauge Drivers
Figure 5 shows the gauge connections to the STGD. The major
gauge, G1, supports full 360
°
operation with two coils driven. The
seven least significant bits of the gauge information are converted to
an analog level by digital-to-analog converter. The display range is
divided into eight sections, two sections per quadrant. The coils are
driven with a Sine/Cosine approximation. The three most significant
bits of gauge display information control the multiplexer to select
which coil is fed by the DAC and which coil receives a fixed bias.
The multiplexer also determines the polarity of the voltages supplied
to the coils.
The minor gauges, G2 and G3, each have one coil driven by a DAC.
The other coils of each gauge are wired in series with the switched
battery supply to supply the bias. The switched battery supply is
turned off during over voltage conditions. Only 9-bits of information
are required for the minor gauges, however, 10-bits are shifted
through the part to maintain compatibility with the SGD and DGD.
Hence, all gauges, both major and minor, are supplied with 10-bit
data for consistency.
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參數(shù)描述 |
|---|---|
| SA5778D,512 | 功能描述:緩沖器和線路驅(qū)動器 SERIAL TRIPLE GAUGE DRIVER RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| SA5778D,518 | 功能描述:緩沖器和線路驅(qū)動器 SERIAL TRIPLE GAUGE DRIVER RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| SA5778D/CE1804 | 制造商:NXP Semiconductors 功能描述:SERIAL TRIPLE GAUGE DRIVER 28-PIN SO |
| SA5778D/CE1804,512 | 功能描述:IC SERIAL TRPL GAUGE DRVR 28SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件 |
| SA5778D/CE1804,518 | 功能描述:IC SERIAL TRPL GAUGE DRVR 28SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 應(yīng)用說明:Ultrasound Imaging Systems Application Note 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:37 系列:- 應(yīng)用:醫(yī)療用超聲波成像，聲納 電流 - 電源:- 電源電壓:2.37 V ~ 6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:56-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-TQFN-EP（8x8） 包裝:管件 |
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