U2761B Datasheet, PDF (2/11 Pages) TEMIC Semiconductors – DECT RF / IF IC

U2761B
Pin Description
RSSI 1
28 ^OP_OUT
PU 2
27 ^OP_P
IF_TANK1 3
26 OP_N
IF_TANK2 4
25 DEMOD_OUT
GND1 5
24 QUAD_TANK2
MIXER_IN1 6
23 QUAD_TANK1
MIXER_IN2 7
22 GND3
GND2 8
21 _{LO_IN2}
TX_RF_OUT 9
20 ^LO_IN1
VS1 10
IF_IN1 11
19 _VS2
18 MIXER_OUT2
IF_IN2 12
17 _{MIXER_OUT1}
RAMP_OUT 13
16 _{TX_ON}
RAMP_SET 14
15 _{RX_ON}
14808
Figure 2. Pinning
Á ÁÁ ^Pin
Symbol
ÁÁ^Function
1
RSSI
Received signal strength
indicator output
2
PU
Hardware power-up input
3
4
5
ÁÁÁÁÁ ÁÁÁÁÁÁÁÁ IF_TANK1
IF_TANK2
GND1
IF tank circuit Pin 1
F tank circuit Pin 2
Ground
6
MIXER_IN1 Mixer RF differential
7
Á^{input 1}
MIXER_IN2 Mixer RF differential
8
ÁÁ ÁÁ ^GND2
input 2
Ground
9
10
11
TX_RF_OUT
VS1
IF_IN1
Output of TX driver
amplifier
ÁÁ _{Supply voltage input 1}
ÁÁÁÁÁ _{IF amplifier differential}
input 1
12
13
14
ÁÁ ÁÁÁÁÁÁÁÁ ^IF_IN2
RAMP_OUT
RAMP_SET
IF amplifier differential
nput 2
Ramp signal output for PA
Slew-rate setting of ramp
signal
Á¹⁵
16
ÁÁ ^RX_ON
TX ON
ÁÁÁÁ ^{RX control input}
TX control input
17
18
Á MIXER_OUT1 Mixer IF differential
output 1
MIXER_OUT2 Mixer IF differential
output 2
ÁÁ¹⁹
20
21
22
23
24
25
VS2
LO_IN1
ÁÁ ÁÁÁÁÁ _{LO_IN2}
ÁÁ ÁÁÁÁÁ _GND3
ÁÁ Á _{QUAD_TANK1}
Á ÁÁ ÁÁ ÁÁÁ _{QUAD TANK2}
Á _{DEMOD_OUT}
Supply voltage input 2
Local oscillator input 1
Local oscillator input 2
Ground
Quadrature tank circuit 1
Quadrature tank circuit 2
Output of demodulator
26
OP_N
OP – Input inverting
27
OP_P
OP – Input non-inverting
28
OP_OUT OP – Output
2 (11)
TEMIC Semiconductor
Preliminary Information
Rev. A4, 10-Mar-98