ADL5571

Rev. 0 | Page 6 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

5

VCC1

6

RFIN

7

GND

8

VREG

15 RFOUT

16 NC

NC = NO CONNECT

14 RFOUT

13 NC

ADL5571

TOP VIEW

(Not to Scale)

Figure 2. Pin Configuration

Table 4. Pin Function Descriptions

Pin No.

Mnemonic

Description

1, 11, 12, 13, 16

NC

No Connect. Do not connect these pins.

2

VCC2

This power supply pin should be connected to the supply via a choke circuit (see Figure 19).

3, 7

GND

Connected to Ground.

4

STBY

When STBY is low (0 V), the device operates in transmit mode. When the radio is receiving data, STBY

can be taken high (2.5 V), reducing the supply current to 9 mA.

5

VCC1

Connect to Power Supply.

6

RFIN

RF Input.

8

VREG

When VREG is low, the device goes into sleep mode, reducing the supply current to less than 1 μA.

When VREG is high (2.85 V), the device operates in its normal transmit mode. When high, VREG draws

a bias current of approximately 9 mA.

9, 10

CFLT1, CFLT2

Ground-Referenced Capacitors. These should be connected to reduce bias line noise.

14, 15

RFOUT

Unmatched RF Outputs. These parallel outputs are matched to 50 Ω using a microstrip line and shunt

capacitor. The power supply voltage should be connected to these pins through a choke inductor.

Exposed

Paddle

The exposed paddle should be soldered down to a low impedance ground plane (use multiple vias,

at least 9, to stitch together the ground planes) for optimum electrical and thermal performance.

Table 5. Operating Modes1

Mnemonic

Normal Operation

Standby Mode

Sleep Mode

VREG

High

High

Low

STBY

Low

High

X