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PDF AMIS-52000 Data sheet ( Hoja de datos )
| Número de pieza | AMIS-52000 | |
| Descripción | Single-Chip Radio Transceiver | |
| Fabricantes | AMI SEMICONDUCTOR | |
| Logotipo |  |
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AMIS-52000 Single-Chip Radio Transceiver
Data Sheet
1.0 Introduction
The AMIS-52000 is a low cost, ultra low power ASK/OOK
(Amplitude Shift Keying/On-Off Shift Keying) transceiver
intended for narrow band RF applications. The device is
targeted for applications at 433MHz but can operate from
260 to 700MHz. The adjustable RF output ranges from –26
to +6dBm into a matched 50ohm load. The receiver
contains two independent receive channels which can be
2.0 Key Features
• Very low power single-chip transceiver
• Minimal external components
• Low power RC oscillator
• Unique Quick Start, low-noise oscillator (patent pending)
• Extreme low power RF Sniff Mode™, wake on RSSI
• Internal trim functions
connected to separate antennas for antenna diversity
applications.
On chip trim registers eliminate manual trimming of
external components. Using the on chip trimming, transmit
and receive frequencies achieve 5ppm accuracy over the
entire voltage and temperature range.
• I2C control interface
• Serial TX/RX data port
• Clock generation for an external microprocessor
• Wake up on RSSI
• Unique antenna diversity dual receiver (patent pending)
• Internal VCO/PLL tuning varactor
3.0 Technical Features
• Operating Frequency: Range 260 to 700MHz
• TX Output Power: +6dBm
• RX Sensitivity:
• Sniff Mode: -93dBm minimum
• Receive: -103dBm minimum @ 1Kbps
• Data Rate: 1 to 19.2Kbps, user selectable
ww•wP.DowateaSr hReeeqt4uUir.ecmoments:
• Receive: 7.5mA (continuous)
• Transmit: 25mA full power; 50% duty cycle
• Sniff Mode: 750µA at a 1ms sniff rate (10% duty
cycle)
• Standby: 500nA (RC oscillator running)
• Operating Voltage: 2.4 to 3.6V
• Modulation: ASK/OOK (Amplitude Shift Key/On-Off
Shift Key)
• Xtal Start Time: 15µs (Quick Start)
• Sniff Mode Polling: 0.5ms to 16s (0.5ms or 64ms steps)
• PLL Lock Time: <50µs
• Selectable Data Filter: up to 19.2 Kbps
• Internal Trim Function:
• TX power
• Antenna for trim or tune (2 inputs are
independent)
• Xtal for frequency and quick start
• RC for frequency
• Sniff mode for data threshold
• Data slice
• I2C Interface: Control bus
• Serial Interface: Data input/output
• Low Frequency IF
• Internal IF Filtering
• Package: 20-lead, 209 m SSOP
AMI Semiconductor - Confidential
www.amis.com
1
1 page  
AMIS-52000 Single-Chip Radio Transceiver
Data Sheet
7.0 Pin Descriptions
RX1, RX2, RF Inputs
RX1 and RX2 are RF antenna inputs to the AMIS-52000. The
internal design of these circuits is identical. Each internal
circuit can be trimmed to compensate for device process
tolerances and external component tolerances. The first
stage of the RF input is an LNA (Low Noise Amplifier). The
receiver uses a low IF frequency and internal filters. The
two inputs are “summed” before the data recovery circuit.
The receiver uses an RSSI (Receive Signal Strength Indication)
to recover the ASK/OOK (Amplitude Shift Keyed/On Off Shift
Keyed) modulated data.
The receiver is controlled by writing to the internal registers
of the AMIS-52000:
Table 10: Pin Descriptions
Register
Register
0x05
Register
0x0F
Register
0x17
&
Register
0x05
RX1 or RX2 Receiver Control (Registers 0x05, 0x0F and 0x17)
Bit
Bit Name
Bit State Comments
0
Antenna
0
Receive circuits (RX1) are off
#1 Enable
1
Receive circuits (RX1) are controlled by Bit 3
1
Antenna
0
Receive circuits (RX2) are off
#2 Enable
1
Receive circuits (RX2) are controlled by Bit 3
3
RX Enable
0
Receiver is disabled (off)
1 Receiver is enabled (on)
53 Continuous 0
Normal operation
RX 1 RF receiver is turned on
Register
000 Set Data filter to 1.1kHz
0x17
Data Rate
001
Set Data filter to 2.3kHz
Bit 6 & 7 Cntl
010 Set Data filter to 5.2kHz
011 Set Data filter to 10.4kHz
Register BIT Order
100
Set Data filter to 1.18kHz
0x05
Bit 7 msb
101
Set Data filter to 2.57kHz
Bit 2
Bit 2 lsb
110
Set Data filter to 7.0kHz
111 Set Data filter to 20.45kHz
TX/RX, Data Input/Output
wwTwh.eDaTtaXS/RheXetp4Uin.c(oimn transmit operation) is the digital data
input to the AMIS-52000’s transmit circuits. The data is used
to turn the transmitter on or off. The AMIS-52000 does not
perform protocol conversion to the data. It simply transmits
when transmission is enabled. The state (low input or high
input) that causes the AMIS-52000 to transmit is
programmable.
The TX/RX pin (in receive) is the digital data output from
the AMIS-52000 receiver. The received data is formed into
high and low signals (ones and zeros) in a serial bit stream.
The data output state (pin TX/RX) produced by the AMIS-
52000 receiver due to the presence of RF energy at the RX
input can be programmed to be either a high level or a low
level. An external controller must recreate the actual
information.
The TX/RX pin (can be programmed to be the oscillator
output) is the RC oscillator frequency. An external test
system can use this signal in a feedback loop to trim the RC
oscillator frequency.
The TX/RX pin (during the Sniff or signal capture period) is
an indicator (to a host controller) output that either the
AMIS-52000 receiver has detected RF energy when the
device is powered down with Sniff Mode enabled or the
internal housekeeping timer has expired. When TX/RX is
used in this mode the I2C data line will be high when RF
energy is detected or low when the housekeeping timer
activates the device. Depending on the bit period time, this
acquisition could occur on the first bit of data and still
receive the bit or it may require a pre-amble. The following
timing chart shows the function of this pin in signal
acquisition and Sniff Modes.
AMI Semiconductor - Confidential
www.amis.com
5
5 Page 
AMIS-52000 Single-Chip Radio Transceiver
Data Sheet
VCO1, VCO2, VCO Tuning
The AMIS-52000 has an internal Voltage Controlled
Oscillator (VCO). A parallel LC circuit (tuned to twice the
desired RF frequency) is connected between the VCO1 and
VCO2 pins to set the frequency of the VCO.
There is a secondary requirement in the selection of the
components for this function. When the component values
meet the above resonant requirements, the loop
filter voltage should be about in the mid range of the
Figure 6 – Frequency Tuning Components for 433.92MHz
supply voltage (Vloopfilter = (1/2) the VCC supply).
Different combinations of the L and C should be tried until
this secondary requirement is also met.
This circuit is sensitive to the PCB board layout. The
components should be located as close as possible to the
AMIS-52000 part.
The parallel LC circuit tunes the internal VCO frequency.
The frequency is determined by the following:
Frequency = (2) * (Rxfreq) MHz
ctot = CAP + 2.25 pF
INDUCTOR = 1/((Ctot) * ((2πF)^2)))
More detailed information on this function is found in the
AMIS application note, “AMIS-52000 Extending the AMIS-
52000 Frequency Range Beyond the 433MHz Target.”
LPFFILT
The AMIS-52000 uses a Phase Locked Loop to set the
frequency stability of the oscillators. This circuit requires an
external LOOP FILTER connected to pin LPF. The following
second order loop filter is suggested. The components for
this filter should be located as close to the AMIS-52000 part
as possible in the PCB layout. More detailed information on
the design of this filter is found in the AMIS application
note, “AMIS-52000 Extending the AMIS-52000 Frequency
Range Beyond the 433MHz Target.”
www.DataSheet4U.com
Figure 7 – Typical Loop Filter Design
AMI Semiconductor - Confidential
www.amis.com
11
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