DS2722-F-03 MICRO-LINEAR [Micro Linear Corporation], DS2722-F-03 Datasheet - Page 12

• Manufacturer Part Number: DS2722-F-03
• Description: 900MHz Low-IF 1.5Mbps FSK Transceiver Final Datasheet
• Manufacturer: MICRO-LINEAR [Micro Linear Corporation]

DS2722-F-05
PIN
SERIAL BUS SIGNALS
15
26
28
4
5
6
VTUNE
VBG
RSSI/TPI
EN
DATA
CLK
SIGNAL
NAME
I (CMOS)
I (CMOS)
I (CMOS)
I/O
O
O
I
VCO Tuning Voltage input from the PLL
loop filter. This pin is very sensitive to
noise coupling and leakage currents.
Internal Bandgap Reference Voltage.
Decoupled to ground with a 220nF
capacitor.
Buffered Analog RSSI output with a
nominal sensitivity of 35mV/dB. An RF
input signal range of –95 to –20 dBm
gives an RSSI voltage output of zero to
2.7 V.
Enable pin for the three-wire serial
control bus that sets the operating
frequency and programmable options.
The control registers are loaded on a
low-to-high transition of the signal. Serial
control bus data is ignored when this
signal is high. This is a CMOS input, and
the thresholds are referenced to VDD
and VSS.
Serial Control Bus Data. 16-bit words,
which include programming data and the
two-bit address of a control register. This
is a CMOS input, and the thresholds are
referenced to VDD and VSS.
Serial control bus data is clocked in on
the rising edge when EN is low. This is a
CMOS input; the thresholds are
referenced to VDD and VSS.
FINAL DATASHEET
FUNCTION
DECEMBER 2003
DATA
VTUNE
VTUNE
CLK
EN
4
5
6
RSSI
OP
AMP
15
15
VDD
VSS
31
8
MUX
RSSI
MUX
TPI
5.5k
DIAGRAM
VCC2
VCC2
VSS
VSS
13
13
8
8
100
3.7k
3.7k
1.7p
ML2722
VCC5
VSS
24
8
1.25V
1.25V
28 RSSI/TPI
12