SA5777A PDF даташит
Спецификация SA5777A изготовлена «Philips» и имеет функцию, называемую «Dual air-core gauge driver». |
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Детали детали
Номер произв | SA5777A |
Описание | Dual air-core gauge driver |
Производители | Philips |
логотип |
12 Pages
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INTEGRATED CIRCUITS
SA5777A
Dual air–core gauge driver
Product specification
Supersedes data of 1997 Feb 24
1999 Sep 20
Philips
Semiconductors
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Philips Semiconductors
Dual air-core gauge driver
Product specification
SA5777A
DESCRIPTION
The SA5777A 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 SA5777A has
10-bit resolution (0.35 degree) and is guaranteed to be monotonic.
Data can be shifted through the part, allowing several SA5777As 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 (0.5 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
ORDERING INFORMATION
DESCRIPTION
16-Pin Plastic Dual In-Line Package (DIP)
28-Pin Plastic Small Outline Package (SO)
PIN CONFIGURATION
N Package
C1– 1
C1+ 2
AGND 3
VBB 4
DATAOUT 5
DATAIN 6
VCC 7
OE 8
16 C2+
15 C2-
14 COM
13 AGND
12 DGND
11 ST
10 CS
9 SCLK
D Package
C1– 1
C1+ 2
NC 3
NC 4
NC 5
AGND 6
VBB 7
DATAOUT 8
DATAIN 9
NC 10
NC 11
NC 12
VCC 13
OE 14
28 C2+
27 C2-
26 NC
25 NC
24 COM
23 AGND
22 NC
21 NC
20 DGND
19 ST
18 NC
17 NC
16 CS
15 SCLK
SL00460
Figure 1. Pin configuration
TEMPERATURE RANGE
-40 to +85°C
-40 to +85°C
ORDER CODE
SA5777AN
SA5777AD
DWG #
SOT38-4
SOT136-1
1999 Sep 20
2 853-1930 022368
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Philips Semiconductors
Dual air-core gauge driver
Product specification
SA5777A
BLOCK DIAGRAM
VBB
7 + – BIT
DAC
8
7 + – BIT
DAC
8
MUX
MUX
OE VBB
C2+
VBB/2
C2–
COM
C1+
C1–
CS
VCC
DIN
SCLK
9-BIT LATCH
10-BIT
SHIFT REGISTER
9-BIT LATCH
10-BIT
SHIFT REGISTER
Figure 2. Block diagram
FAULT
DETECTION
ST
DOUT
SL00461
Table 1. SA5777A Pin Descriptions for the N Package (Dual In-Line)
Pin # Name
Function
1. C1– Negative output connection to the TAN coil of meter #1.
2. C1+ Positive output connection to the TAN coil of meter #1.
3. AGND Ground for VBB supply. Pins 3, 12 and 13 should be connected on the circuit board.
4. VBB Analog supply. Nominally 13.5 V.
5.
DATAOUT Serial data output. Output of the internal shift register. When a new data word is shifted in, the old word is shifted out the
DATAOUT pin. DATAOUT output is always active.
6.
DATAIN Serial data input. A new data word is serially shifted into the part on the rising edge of SCLK. The data is shifted in MSB
first, gauge 1 first.
7. VCC 5 V logic supply. The internal latches and registers are set to zero on the rising edge of this signal.
8. OE Output drivers are turned off when this input is low.
9.
SCLK
Serial clock input. Data is loaded into the part on the rising edge of SCLK. Data is shifted out of DATAOUT on the falling
edge of SCLK.
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
transition of CS loads the new 20-bit word into the DAC registers and updates the output.
ST Status output. This is an open drain output and goes low when the coil output buffers (C1+, C1–, C2+, C2–, COM) have
11. been disabled. The coil outputs may be disabled due to shorted outputs, over-temperature conditions, power-on reset,
or by the output enable (OE) pin. Multiple status outputs , ST, may be wire OR’ed together.
12. DGND Ground for VCC supply. Connect to Pins 3 and 13.
13. AGND Ground for VBB supply. Connect to Pins 3 and 12.
14. COM Output drive for biased coils. This output will be 1/2 of VBB.
15. C2– Negative output connection to the TAN coil of meter #2.
16. C2+ Positive output connection to the TAN coil of meter #2.
1999 Sep 20
3
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Номер в каталоге | Описание | Производители |
SA5777A | Dual air-core gauge driver | Philips |
SA5777AD | Dual air-core gauge driver | Philips |
SA5777AN | Dual air-core gauge driver | Philips |
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