AS5043 Datasheet, PDF (2/26 Pages) ams AG – PROGRAMMABLE 360° MAGNETIC ANGLE ENCODER WITH ABSOLUTE SSI AND ANALOG OUTPUTS

AS5043 Programmable 360° Magnetic Angle Encoder
5 Pin Configuration
Figure 2: AS5043 pin configuration SSOP16
Package = SSOP16 (16 lead Shrink Small Outline Package)
Pin Symbol Type Description
Magnet Field Magnitude RaNGe warning;
active low, indicates that the magnetic
1 MagRngn DO_OD
field strength is outside of the
recommended limits.
2 Mode
DI_PD,
ST
Mode input. Select between low noise
(open, low) and high speed (high) mode.
Internal pull-down resistor
3 CSn
DI_PU, Chip Select, active low; Schmitt-Trigger
ST
input, internal pull-up resistor (~50kΩ)
4 CLK
5 NC
DI,ST
-
Clock Input of Synchronous Serial
Interface; Schmitt-Trigger input
must be left unconnected
6 DO
7 VSS
DO_T
S
Data Output of Synchronous Serial
Interface
Negative Supply Voltage (GND)
OTP Programming Input and Data Input
for Daisy Chain mode. Internal pull-down
8 Prog_DI DI_PD resistor (~74kΩ).
Should be connected to VSS if
programming is not used
9 DACref AI
DAC Reference voltage input for external
reference
10 DACout AO
11 FB
AI
12 Vout
AO
DAC output (unbuffered, Ri ~8kΩ)
Feedback, OPAMP inverting input
OPAMP output
13 NC
-
Must be left unconnected
14 NC
-
15 VDD3V3 S
16 VDD5V S
Must be left unconnected
3V-Regulator Output for internal core,
regulated from VDD5V.Connect to
VDD5V for 3V supply voltage. Do not
load externally.
Positive Supply Voltage, 3.0 to 5.5 V
Table 1: Pin description SSOP16
DO_OD
DI_PD
state
DI_PU
input
AI
DI
digital output open drain S supply pin
digital input pull-down DO_T digital output /tri-
digital input pull-up
ST schmitt-trigger
analog input
digital input
AO analog output
5.1 Pin Description
Pins 7, 15 and 16 are supply pins, pins 5, 13 and 14
are for internal use and must be left open.
Pin 1 is the magnetic field strength indicator,
MagRNGn. It is an open-drain output that is pulled to
VSS when the magnetic field is out of the
recommended range (45mT to 75mT). The chip will
still continue to operate, but with reduced
performance, when the magnetic field is out of range.
When this pin is low, the analog output at pins #10
and #12 will be 0V to indicate the out-of-range
condition.
Pin 2 MODE allows switching between filtered (slow)
and unfiltered (fast mode). See section 9.
Pin 3 Chip Select (CSn; active low) selects a device
for serial data transmission over the SSI interface. A
“logic high” at CSn forces output DO to digital tri-
state.
Pin 4 CLK is the clock input for serial data
transmission over the SSI interface (see section 8)
Pin 6 DO (Data Out) is the serial data output during
data transmission over the SSI interface (see section
8)
Pin 8 PROG_DI is used to program the different
operation modes, as well as the zero-position in the
OTP register.
This pin is also used as a digital input to shift serial
data through the device in Daisy Chain Configuration,
(see page 6).
Pin 9 DACref is the external voltage reference input
for the Digital-to-Analog Converter (DAC). If selected,
the analog output voltage on pin 12 (Vout) will be
ratiometric to the voltage on this pin.
Pin10 DACout is the unbuffered output of the DAC.
This pin may be used to connect an external OPAMP,
etc. to the DAC.
Pin 11 FB (Feedback) is the inverting input of the
OPAMP buffer stage.
Revision 1.4, 04-Apr-06
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