Datasheet > NRF401

NRF401

更新时间： 2022-11-26 05:42:03

品牌	Logo	应用领域
其他 - ETC		射频
页数	文件大小	规格书
18页	275K
描述
433MHz Single Chip RF Transceiver

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数据手册

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NRF401 数据手册

PRODUCT SPECIFICATION

nRF401 Single Chip RF Transceiver

Std.by to RX

VDD

Std.by to TX

VDD

PWR_UP

TXEN

PWR_UP

TXEN

DOUT

DIN

3ms

1ms1ms

(b)

(a)

Figure 5 Timing diagram for nRF401 when going from standby to RX-mode (a) or

TX-mode (b).

Power up to transmit-mode (start-up).

To avoid spurious emission outside the ISM-band when the power supply is switched

on, the TXEN-input must be kept low until the synthesised frequency is stable, see

Figure 6 (a).

When enabling transmit-mode, TXEN-input should be high for at least 1 ms before

data (DIN) is transmitted, see Figure 6 (a).

VDD=0 to TX

VDD=0 to RX

VDD

PWR_UP

TXEN

VDD

PWR_UP

TXEN

DIN

DOUT

3ms

1ms

5ms

(b)

(a)

Figure 6. Timing diagram for nRF401 when powering up to TX-mode (a)

or RX-mode (b).

Power up to receive mode (start up).

In transition from power up to receive mode, the receiver may not receive data

(DOUT) until VDD has been stable (VDD > 2.7 V) for at least 5ms, see Figure 6(b).

If an external reference oscillator is used, the receiver may receive data (DOUT) after

3ms.

Nordic VLSI ASA

Revision: 1.5

Vestre Rosten 81, N-7075 Tiller, Norway

Phone +4772898900

Fax +4772898989

May 2000

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