Data Sheet

AD3531/AD3531R

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

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Figure 5. WLCSP Pin Configuration

Table 8. Pin Function Descriptions

WLCSP

Mnemonic

Type

Description

A1

MUX_OUT

AO

Analog Multiplexer. The MUX_OUT pin is used to monitor the internal die temperature, output voltages and output current of a

selected channel.

B1, B2, D2

VDD

S

Power Supply Input. The AD3531/AD3531R operates from 2.7V to 5.5V. Decouple the VDD supply with a 10µF capacitor in parallel

with a 0.1µF capacitor to GND.

C3

IOVDD

DI

Digital Power Supply. The voltage on the IOVDD pin is specified in Table 2.

B3, C1, C2,

D3, E1

GND

S

Ground Reference Point for All Circuitry on the Device.

D1

VREF

AI/O

Reference Output Voltage. When using the internal reference, this is the reference output pin. The VREF is the reference input by

default.

E5

SDI

DI

Serial Data Input. Logic Input. Provides data to be written to the device and is clocked into the register on the rising edge of SCLK.

D5

CSB

DI

Active Low Control Input. This is the frame synchronization signal for the input data.

C4

RESETB

DI

Asynchronous Reset pin. Active-low logic input and falling edge sensitive. See the Hardware Reset section for additional

information.

C5

SDO

DO

Serial Data Output. Logic output. A readback operation provides data on this output pin as a serial data stream. Data is clocked out

on the falling edge of SCLK and is valid on the rising edge of SCLK.

B5

SCLK

DI

Serial Clock Input. Data transfers at rates of up to 50MHz for write operation and 25MHz for read operation.

A5

LDACB

DI

Asynchronous Load DAC pin. Active low logic input, falling edge sensitive. See the Hardware LDAC section for additional

information.

A4, B4

VOUT0

AO

Analog Output Voltage from DAC 0. The output amplifier has rail-to-rail operation. Short pins A4 and B4.

A2, A3

VOUT1

AO

Analog Output Voltage from DAC 1. The output amplifier has rail-to-rail operation. Short pins A2 and B3.

D4, E4

VOUT2

AO

Analog Output Voltage from DAC 2. The output amplifier has rail-to-rail operation. Short pins D4 and E4.

E2, E3

VOUT3

AO

Analog Output Voltage from DAC 3. The output amplifier has rail-to-rail operation. Short pins E2 and E3.