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PDF ZL70250 Data sheet ( Hoja de datos )
| Número de pieza | ZL70250 | |
| Descripción | Ultra-Low-Power Sub-GHz RF Transceiver | |
| Fabricantes | Zarlink Semiconductor | |
| Logotipo |  |
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Revision 3 - Preliminary Datasheet
ZL70250 Ultra-Low-Power Sub-GHz RF Transceiver
Features
• Ultralow Power
– Typical TX Current (at 50-Ω match):
<2mA at −13dBm;<5mA at −2dBm
– Typical RX Current: <1.9mA
– Sleep Current: <500nA
– Supply: 1.2V to 1.8V
• Radio Operating Frequency Range: 795 to 965MHz
– North American ISM Band: 902 to 928MHz
– European SRD Bands: 863 to 870MHz
• Radio Performance
– Raw Data Rate: 186kbit/s
– TX Power: up to 0dBm
– RX Sensitivity: −90dBm Typical at 186kbit/s
• Very Few External Components
– Only Crystal and Bias Resistor
• Standard Interfaces
– SPIbus Master for Packet Data
– Two-Wire for Status and Control
• MAC
– Clear Channel Assessment
– Sniff with Automatic Receive or Sleep
– Automatic Clear-to-Send, Turn-Around, and Sleep
– Receiver AGC
– Packetization
– Preamble and Frame Sync
– Whitening
Ordering Information
36-Pin CSP in Tray – ZL70250UEJ2
36-Pin CSP in T&R – ZL70250UEB2
Applications
• Body-Area Network
• Energy Harvesting
• Wireless Sensor Network
• Remote Control
• Voice/Compressed Audio Communication
• RF Switch
• Active RFID
• Inventory Management
Description
The ZL70250 ultra-low-power RF transceiver provides a wireless
link in applications where power consumption is of primary
importance. The transceiver’s ultralow power requirements allow
the use of a coin-cell battery or energy-harvesting methods,
enabling devices with extremely small form factors.
The ultra-low-power device operates in unlicensed frequency
bands between 795 and 965MHz with a data rate of 186kbit/s to
support voice/compressed audio communication. Duty cycling can
be employed for applications that require lower average payload to
further reduce power consumption.
VDDA
24.572675-MHz Crystal
Note: Oscillator frequency = 24.576-MHz without load capacitors
VSSA VSSA2
CLKSEL CLK_OUT
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V
Reference
XTAL OSC
Clock Generator 303 kHz
1.117091 MHz (24.576/22)
RBIAS
I
Reference
16/17
prescaler
A&M
Counter
Phase
Detector
Charge
Pump
Loop LP
Filter
MAC
Range
Compare
VDDD
VSSD
RESET_B
SCL
SDA
RX+
TX+
TX-
RX-
VSSH
LNA
VCO 795/965 MHz
PLL Tuning
PA Modulation
Tuning
Coarse Tuning
Mixer
IF Filter
Limiter
FM
Detector
Antenna
Tune
Blocker
Detector
Test Buffers
RSSI
ZL70250
Analog Test Mux
0003v1207.0
Figure 1 •
AMX0 AMX1 AMX2 AMX3 VDDTST
ZL70250 Block Diagram
Gaussian
Filter
DAC
TX data
Digital Post-
Detection
Filter
RSSI
Blocker Detector
AMX2
Five-
bit
ADC
RX data
IRQ
TXRX_STAT
TXRX_CMD
SPI_CLK
SPI_SEL_B
SPI_DATA_OUT
SPI_DATA_IN
DOUT0
DOUT1
August 2012
© 2012 Microsemi Corporation
I
Datasheet pdf - http://www.DataSheet4U.co.kr/
1 page  
1 – Overview
The ultra-low-power ZL70250 RF transceiver enables RF telemetry in applications powered by coin-cell batteries or
energy harvesting, where wireless telemetry was previously unfeasible. End applications may include wireless
sensors, body-area networks (principally on-body sensors), or voice communication.
With a typical peak/average current consumption below 2mA in both transmit and receive, and with a data rate of
186kbit/s, the ZL70250 enables bidirectional RF links with an impressive efficiency of 13nJ/bit over a range of up to
100 meters.
The output power is programmable and can be reduced to −25dBm to save power in cases where the link budget
allows it, or can be increased up to 0dBm for more range or to allow for system losses such as a very small antenna or
body tissue absorption.
To achieve the minimum possible power consumption, the ZL70250 offers many optimization parameters, all available
to the user via the control interface. To streamline the setup and optimization process, most parameters have an on-
chip automatic trim capability. The frequency tuning is also highly automated.
In addition to its very low power consumption, the ZL70250 also includes a highly flexible Media Access Controller
(MAC) that offers all the basic functions needed to implement a link layer with the minimum amount of data transfer
between the ZL70250 and its controller. Some of the capabilities are:
• Digital RSSI and blocker indicator
• Clear channel assessment
• Transmit with automatic clear-to-send
• Sniff with automatic receive or sleep
• Receiver AGC (programmable)
• Preamble and frame sync generation and detection
• Whitening
• Packetization with programmable size for both transmit and receive
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• Automatic sleep after receive
• Automatic turnaround for bidirectional data transfer
The ZL70250 is also highly integrated. Besides the antenna and, in some cases, its matching network, only a crystal
and a bias resistor are required.
The ZL70250 is an ultra-low-power RF transceiver operating in unlicensed frequency bands between 795 and
965MHz. It offers a data rate of 186kbit/s in 300-kHz-wide channels.
The ZL70250 includes a frequency synthesizer, transmit and receive RF circuitry (shown in Figure 1 on page I), and a
MAC for performing bit and frame synchronization, transmit and receive control, and other digital functions.
The ZL70250 transceiver transmits and receives GFSK-modulated digital data over one 300-kHz-wide channel using
time-division multiplexing. The channel frequency and other features are configurable via registers that must be
programmed over the control interface.
Registers control selective shutdown of the device in order to conserve power. The device does not contain any timing
circuits necessary for periodic wake-up and channel sniffing; this is left to the system host.
The system host initiates and controls Clear Channel Assessment (CCA) at a high level. CCA consists of the RSSI
level and mixer peak detector output (blockers) for the currently programmed receiver channel. CCA of other channels
requires the host to set the receiver for those channels one at a time and to request and read the RSSI and blocker
registers.
Although many different channel frequencies can be selected by programming the synthesizer dividers, the IF has
been chosen such that six adjacent channels can operate within the same range without interference in both the US
and Europe, assuming there are vacant bands that are four channels wide both above and below the six used
channels. The vacant bands are necessary because— due to limitations on power, size, and external components—
the architecture does not include image cancellation or image filtering. The polarity of the receiver data output is
programmable to allow for a high-side LO or a low-side LO.
Revision 3 - Preliminary Datasheet
1-1
Datasheet pdf - http://www.DataSheet4U.co.kr/
5 Page 
PCM Data Packet
ZL70250 Ultra-Low-Power Sub-GHz RF Transceiver
Figure 2-5 • PCM Data Packet with 32-Bit Frame
www.DataSheet.net/
Figure 2-6 • PCM Start of Packet
Revision 3 - Preliminary Datasheet
2-5
Datasheet pdf - http://www.DataSheet4U.co.kr/
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