Features
Low power consumption
2.5GHz input
144 frequencies, 1MHz steps (20MHz crystal)
Forms complete phase locked loop using external
VCO and loop components
Serially programmed via 3 wire bus
Contains anti-modulation circuit
Part of DE6038 Chip-set (WL600C, WL102)
The WL800 is a low power single chip frequency synthesiser.
The circuit is fabricated on Zarlink Semiconductor HG process
and operates from a supply voltage of 2.7 - 3.6V. It is designed
to work with the Zarlink Semiconductor WL600C RF and IF
circuit and the WL102 WLAN controller chip which together
make up the DE6038 frequency hopping Wireless Local Area
Network (WLAN) transceiver.
Related Documents
WL600C, WL102 datasheets
TQFP 32
Figure 1 - Pin connections - top view
PIN 1 IDENT
Absolute Maximum Ratings
Supply Voltage Vcc
4VDC
Transmit/Receive and
-0.5VDC to Vcc +0.5VDC
Standby Input
Prescaler Inputs Pins 30 &31 No DC. Externally Capacitively
Coupled.
Output Current (any output)
TBD mA
Junction temperature Tj
150
C
ESD protection:
2kV
Operating temperature
-20 to +85
C
WL800
2.5GHz Frequency Synthesiser
Preliminary Information
DS4583
ISSUE 1.6
October 1997
Ordering Information
WL800/KG/TP1R
2
WL800
Preliminary Information
PIN
REFERENCE
TYPE
DESCRIPTION
1
VCC1
VCC
Power for serial data bus
2
CS-DATA
IN
Channel Data in (Synth Programming)
3
CS-CLK
IN
Data Clock (Synth Programming)
4
CS-LOADB
IN
Data Enable (Synth Programming)
5
STDBYB
IN
Power down control Active = Logic 1 Standby = logic 0
6
VEE1
GND
Ground connection
7
ISET
Set modulation current
8
ICP
Set charge pump current
9
VEE3
GND
Ground connection
10
TXD
IN
Modulation data in
11
COM CAP
Compensation capacitor for modulation data
12
RCOMP
OUT
Resistor for V/I converter
13
IDOUT
OUT
Modulation data out
14
TXRXB
IN
Transmit/Receive control Transmit = Logic 1 Receive = Logic 0
15
VARICAP
OUT
Control V to varicap in VCO
16
VCC3
VCC
Power for charge pump and loop amplifier and modulator
17
LOOPFILTER
OUT
Loop filter out (Loop Filter Components)
18
CPUMPREF
Charge pump reference voltage
19
CPUMPOUT
OUT
Charge pump out (Loop Filter Components)
20
VEE2
GND
Ground connection
21
SYSCLK
OUT
Reference (system) clock out
22
XTAL
Crystal connection (Differential)
23
XTALB
Crystal connection (Differential)
24
VCC2
VCC
Power for reference oscillator
25
FREF
OUT
Reference frequency monitor
26
LKCAP
Lock detect capacitor
27
LCKDETB
OUT
Lock detect output
28
FV
OUT
VCO frequency / (NM+A) monitor
29
VEE5
GND
Ground connection
30
VCC
VCC
Power for prescaler, AM counter Ref divider, phase detector and
lock detector
31
VCOIPB
IN
Prescaler IN-
32
VCOIP
IN
Prescaler IN+
Device PIN OUT
3
WL800
Preliminary Information
PRE-SCALER
A COUNTER
PHASE DET
& CHARGE
PUMP
INPUT REGISTER
M COUNTER
REFERENCE
OSC
DIVIDE
BY 20
REF OUT
BUFFER
LOCK
DETECT
PRE
AMP
DATA
BUFFER
1,16,24,30
Vcc
6,9,20,29
Vee
STANDBY
5
14
TXRXB
DATA
2
CLK
3
ENABLEB
4
VCOIP
32
VCOIPB
31
DIN
10
IDOUT
13
ISET
7
21
REF
OUT
23
XTAL1
22
XTAL2
LKCAP
26
LKDETB
27
CPUMP
REF
18
VARICAP
15
LOOP
FILTER
17
CPUMP
OUT
19
MOD
COMP
COMP
11
ICP
8
FREF
25
28
FV
12
RCOMP
VCAP
CHARGE
CAP
BUFFER
1/3
SYSCLK
STDBYB
LCKDETB
COMPCAP
TXD
CS-DATA
CS-CLK
CS-LOADB
B
Figure 1 - WL800 block diagram
XTALB
4
WL800
Preliminary Information
Electrical Characteristics
These characteristics are guaranteed over the following conditions (unless otherwise stated):
T
AMB
= -20
C, to +85C, Vcc = 2.7V to 3.6V
Characteristic
Value
Unit
Condition
MIN
TYP
MAX
Supply current (total)
Transmit
37
50
mA
Receive
35
50
mA
Supply current in standby
3
5
mA
PROGRAMMING INPUTS
Logic low voltage
0
0.4
V
Logic high voltage
0.8Vcc
Vcc
V
Input current
1
A
Input level high
Data clock frequency (1/tclock)
20
MHz
See Fig. 2
Data/Enable set up time (t set up)
10
ns
See Fig. 2
Enable hold time (t enable)
10
ns
See Fig. 2
Positive clock pulse width (tp)
20
ns
See Fig. 2
Negative clock pulse width (t neg)
20
ns
See Fig. 2
STANDBY INPUT
Logic low input voltage
0
0.8
V
Circuit powered down
Logic high input voltage
Vcc -0.7
Vcc
V
Circuit powered up
Input current
100
150
A
Circuit powered up
-150
A
Circuit powered down
Standby to operate time
3
s
*References operational (see note 1)
TX/RX INPUT
Logic low input voltage
0
0.8
V
Receive mode
Logic high input voltage
Vcc -0.7
Vcc
V
Transmit mode
Input current
10
A
REFERENCE OUTPUT
Reference output frequency
20
MHz
With 20MHz crystal
Reference clock output voltage
200
250
300
mVp-p
With 15pF load
Reference output impedance
600
Ohms
Mark Space ratio
-2%
50/50
+2%
With 15pF load
Rise time
15
ns
Fall time
15
ns
Crystal Drive Levels required
200
mV
Pins 22,23 differential
5
WL800
Preliminary Information
Electrical Characteristics (continued)
These characteristics are guaranteed over the following conditions (unless otherwise stated):
T
AMB
= -20
C, to +85C, Vcc = 2.7V to 3.6V
Characteristic
Value
Unit
Condition
MIN
TYP
MAX
LOCK DETECT CIRCUIT
Smoothing capacitor charge/
80
110
150
A
Determined by application.
discharge current
Threshold voltage
Vcc-0.3
V
On smoothing capacitor
Output high voltage
1.8
Vcc
V
I out = 10
A
Output low voltage
Vee
0.5
V
I out = 0
A
PHASE DETECTOR AND
CHARGE PUMP
Comparison frequency
1
MHz
Divided crystal reference
Charge pump output current
1
mA
Rpin 8 = 10k
Up down current matching
5
%
Reference voltage
V
cc
-1.05
V
cc
-0.7
V
CHARGE PUMP OP-AMP
First Stage:
High output voltage
2.4
V
Low output voltage
0.3
V
Second Stage:
Filter drive amplifier output current
1
mA
Filter drive amp output swing
0.77
Vp-p
PRESCALER
Input drive voltage
40
200
mV rms
Maximum operating frequency
3
GHz
Input Impedance
330
0.5pF
TRANSMIT DATA INPUT
Logic low
-60
-100
A
Rsource=20k
Logic high
+60
+100
A
TX DATA OUT
Logic 0 output current
25
50
100
A
Set by external resistor on pin 7
Logic 1 output current
200
nA
Leakage Current
Output current in receive mode
25
A
Equal to 0.5 mod current
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