Data Sheet

ADAF1080

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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Rev. 0 | 11 of 36

Figure 4. Pin Configuration

Table 13. Pin Function Descriptions

Pin No.

Mnemonic

Description

1

VDD

Supply Voltage. The VDD pin must be connected to the other VDD supply voltage pin (Pin 6).

2

VOUT

Output Voltage Proportional to the Magnetic Field Sensed. Output ratiometric to VDD.

3

VSET

VSET Input. The VSET pin sets the common-mode voltage of the OUT pin to VSET/2.

4

A0

Gain Setting LSB. When A0 is not in use, it is internally pulled high to VDD.

5

A1

Gain Setting MSB. When A1 is not in use, it is internally pulled high to VDD.

6

VDD

Supply Voltage. Connect a 1 µF capacitor to GND as close to the VDD pin as possible.

7

VTEMP

Temperature Sensor Output. The maximum VTEMP capacitance load (CLOAD_VTEMP) is 20 pF; therefore, do not drive current out of

this pin. VTEMP is proportional to the die junction temperature.

8

DIAG+

Positive Input of the Diagnostic Coil. If DIAG+ is not in use, connect it to GND.

9

GND

Ground.

10

VREG

Internally Regulated 1.8 V. Connect a 0.1 µF capacitor only to GND. Do not connect any other load to this regulated supply.

11

SYNC_EN

Sync Enable. Set SYNC_EN high to enable clock synchronization. Set SYNC_EN low to use the internal clock for chopping. If

SYNC_EN is not in use, it is internally pulled to GND.

12

NC

No Connect. The NC pin can be left open or connected to GND.

13

SYNC

Digital Input Where an External Clock Can Synchronize the Internal Chopping Amplifier Timing. If SYNC is open, it is internally pulled

to GND.

14

GND_FLIP

Ground of the Flip Coil Driver, Attach to System Ground.

15

VDD_FLIP

Supply of the Flip Coil Driver. Place a 10 µF capacitor between VDD_FLIP and GND_FLIP and a 10 Ω resistor in series between

VDD_FLIP and VDD as close as possible to the VDD_FLIP pin.

16

GND_FLIP

Ground of the Flip Coil Driver, Attach to System Ground.

17

FLIP_DRV

Drive Signal for the Flip Coil Driver. A rising edge sets a positive sensitivity, and a falling edge sets a negative sensitivity. If FLIP_DRV

is not in use, internally pulled it high.

18

DIAG−

Negative Input of the Diagnostic Coil and Measurement Point for the Diagnostic Current. If DIAG− is not in use, this pin can be left

open or connected to the EPAD.

19

NC

No Connect. The NC pin can be left open or connected to GND.

20

NC

No Connect. The NC pin can be left open or connected to GND.

EPAD

Exposed Pad. Leave the exposed pad of the package at a floating voltage but soldered to the PCB in the application. The EPAD is

used as the diagnostic coil and is internally connected between the DIAG+ and DIAG− pins.