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PT9120 Datasheet(PDF) 5 Page - Princeton Technology Corp

Part No. PT9120
Description  GPS Receiver RF Front End IC
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Maker  PTC [Princeton Technology Corp]
Homepage  http://www.princeton.com.tw
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PT9120 Datasheet(HTML) 5 Page - Princeton Technology Corp

 
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Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PT9120 PRE1.0
- 5 -
August, 2007
GPS Receiver RF Front End IC
Preliminary
PT9120
PIN DESCRIPTION
Pin No.
Pin Name I/O
Description
28-pin
24-pin
SGN
O
Quantized 2nd IF “sign” bit
1
1
MAG
O
Quantized 2nd IF “magnitude” bit
2
2
AOK
O
Active antenna status output (AOK = HIGH = active antenna OK;
AOK=LOW=active antenna either open or shorted)
3
-
CP
I/O Reference clock input/output
4
3
TVSS
G
Ground (digital circuitry)
5
4
TVDD
P
Supply voltage (digital circuitry)
6
5
XEN
I
Crystal oscillator enable pin
(XEN=HIGH=enabled; XEN=LOW=disabled)
7
6
XI
I
Crystal oscillator input
8
7
XO
O
Crystal oscillator output
9
-
VB
O
Regulator (1.9V) output
10
8
PLL
O
Charge pump output
11
9
AON
O
Antenna switch-controlled supply voltage to active antenna
12
10
LNI
I
LNA input
13
11
ISNS
I
Antenna detector current sense input
14
12
PVDD
O
Supply voltage (active antenna)
15
13
LNO
O
LNA output
16
14
AVDD
P
Supply voltage (analog circuitry)
17
15
AVSS
G
Ground (analog circuitry)
18
16
RFIN
I
Mixer input
19
17
VBG
O
Band gap reference (1.23V) output
20
18
IF1P
O
21
19
IF1N
O
Differential mixer IF output/differential first-stage IF amplifier
input
22
20
IF2P
I
23
21
IF2N
I
Differential first-stage IF amplifier output/differential IF AGC
input
24
22
MODE
I
Reference frequency mode select input
25
-
AGCCAP
I/O AGC capacitor connection. Sets the AGC time constant.
26
23
P1
I
27
24
P0
I
Power-down control pins (see PT9120 operating modes)
28
-


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