ADIS16250

Rev. 0 | Page 7 of 20

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

DNC = DO NOT CONNECT

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

DNC

COM

DNC

DNC

DIO1 RST

VREF

COM VCC VCC

DNC

AUX

DAC

AUX

ADC

RATE

FILT

DIO0

CS

DIN

DOUT

SCLK

POSITIVE OUTPUT

ROTATIONAL

DIRECTION

ADIS16250

TOP VIEW

(Not To Scale)

Figure 5. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Descriptions

1

SCLK

I

SPI, Serial Clock.

2

DOUT

O

SPI, Data Output.

3

DIN

I

SPI, Data Input.

4

CS

I

SPI, Chip Select, Active Low.

5, 6

DIO0, DIO1

I/O

Multifunction Digital Input/Output Pin.

7

RST

I

Reset, Active Low. This resets the sensor signal conditioning circuit and initiates a start-up sequence.

8, 9, 10, 11

DNC

–

Do Not Connect.

12

AUX DAC

O

Auxiliary DAC Analog Output Voltage.

13

AUX ADC

I

Auxiliary ADC Analog Input Voltage.

14

RATE

O

Analog Rate Signal Output (uncalibrated).

15

FILT

I

Analog Amplifier Summing Junction. This is used for setting the analog bandwidth. See Analog

Bandwidth section for more details.

16, 17

VCC

S

5.0 V Power Supply.

18, 19

COM

S

Common. Reference point for all circuitry in the ADIS16250.

20

VREF

O

Precision Reference Output.

RECOMMENDED LAYOUT

0.500 BSC 2×

9.673 BSC 20×

0.973 BSC 4×

Figure 6. Recommended Pad Layout