5

AT86RF210

5033AS–WIRE–10/03

Note:

*Rise and fall time is measured 10%–90%. Delay, setup, and hold times are measured 50%–50%

TCLKH

CLK hold time

25

nsec

TCLKW

CLK pulse width

50

nsec

TSDIS

SDI setup time

25

nsec

TSDIH

SDI hold time

25

nsec

TSDOD

SDO delay time

25

nsec

Table 8. Low Battery Detector Characteristics

Symbol

Parameter

Min

Typ

Max

Unit

Lvbat 0

Low voltage battery detector threshold voltage mode

0 (5 bit resolution)

1.5

3.5

Volt

Table 7. Serial Configuration Register* (Continued)

Symbol

Parameter

Min

Typ

Max

Unit

Table 9. Preliminary PIN Description QFN48

PIN

Num

Type

Startup

Cond

Description

SUB

1

V_I/O

GND

Substrate connection

LNARFIN

2

RF_I

NA

Low-noise amplifier RF input

LNAVSS

3

RF_I/O

NA

Analog ground for the LNA

RSWOUT

4

RF_I/O

NA

Transmit-receive switch out. Signal from ANT is routed through the

TR switch to the LNA input.

VSS

5

RF_I/O

NA

Transmit-receive switch isolation ground 1.

ANT

6

RF_I/O

NA

Antenna RF input/output. Nominal impedance 50

Ω, part of T/R

switch. Routes signal to the LNA or from the PA.

VSS

7

RF_I/O

NA

Transmit-receive switch isolation ground 2.

TSWIN

8

RF_I/O

NA

Transmit-receive switch input. Signal from PA comes into TR switch

and is routed to ANT.

PAOUT

9

RF_I/O

NA

PA signal routed into the T/R switch from the PA.

VSS

10

Pin not used

VDDA

11

V_I

NA

Secondary analog power supply input. Set in proximity to power

amplifier circuits.

PAREG

12

A_O

NA

PA regulator output. Settable current source output for charging a

large external capacitor during battery operation.

VCOVDD

13

V_I

NA

VCO power supply input

VCOREG

14

V_I

NA

External filter cap for the VCO regulator

No Connect

15

NA

Pin not used

No Connect

16

NA

Pin not used

VCOVSS

17

A_I/O

NA

VCO power supply ground

VCOTUNE

18

A_I

NA

LO VCO control input. An internal differential varactor diode tunes the

LO frequency. The control voltage should be referenced to LOGND.