Revision 1.0

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nRF24AP2-USB Product Specification

Table 17. Transceiver characteristics

8.1

USB interface

The USB interface electrical performance is compliant with the USB specification 2.0.

Table 18. USB interface characteristics

P_IM(4)

Input power of IM interferers at 4 and

8 MHz distance from wanted signal

g

-36

dBm

P_IM(5)

Input power of IM interferers at 5 and

10 MHz distance from wanted signal

g

-36

dBm

a. Usable band is determined by local regulations.

b. Data rate in each burst on-air.

c. The minimum channel spacing is 1 MHz.

d. Antenna load impedance = 15

Ω + j88 Ω.

e. Wanted signal level at Pin = 64 dBm. Two interferers with equal input power are used. The interferer clos-

est in frequency is unmodulated, the other interferer is modulated equal to the wanted signal. The input

power of interferers where the sensitivity equals BER=0.1% is presented.

Characteristic

Symbol

Conditions

Min.

Typ.

Max

Unit

Electrical characteristics

Input high voltage (driven)

VIH

2.0

V

Input low voltage

VIL

0.8

V

Differential input sensitivity

VDI

|(D+) – (D-)|

0.2

V

Differential common mode range

VCM

Includes VDI

range

0.8

2.5

V

Single ended receiver threshold

VSE

0.8

2.0

V

Single ended receiver hysteresis

VSEH

200

mV

Output low voltage

VOL

0

0.3

V

Output high voltage

VOH

2.8

3.6

V

Differential output signal cross-point

voltage

VCRS

1.3

2.0

V

Internal pull-up resistor (Standby

mode)

900

1100

1575

Ω

Internal pull-up resistor (Active mode)

1425

2100

3090

Ω

VTRM

3.05

3.5

V

Output driver resistance (does not

include the series resistance)

ZDRV

Steady state

drive

15

Ω

Timing characteristics

Driver rise time

TFR

CL=50pF

4

20

ns

Driver fall time

TFF

CL=50pF

4

20

ns

Rise/fall time matching

TFRFF

TRF / TFF

90

111

%

Transceiver pad capacitance

CIN

Pad to ground

20

pF

Symbol

Parameter (condition)

Notes

Min.

Typ.

Max.

Units