參數(shù)資料
型號(hào): PT9120-QF24
廠商: Princeton Technology Corporation
英文描述: GPS Receiver RF Front End IC
中文描述: GPS接收機(jī)射頻前端IC
文件頁(yè)數(shù): 5/18頁(yè)
文件大?。?/td> 575K
代理商: PT9120-QF24
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
PIN DESCRIPTION
PT9120 PRE1.0
- 5 -
August, 2007
GPS Receiver RF Front End IC
Preliminary
PT9120
Pin No.
Pin Name I/O
Description
28-pin
1
2
24-pin
1
2
SGN
MAG
O
O
Quantized 2nd IF “sign” bit
Quantized 2nd IF “magnitude” bit
Active antenna status output (AOK = HIGH = active antenna OK;
AOK=LOW=active antenna either open or shorted)
I/O Reference clock input/output
G
Ground (digital circuitry)
P
Supply voltage (digital circuitry)
Crystal oscillator enable pin
(XEN=HIGH=enabled; XEN=LOW=disabled)
I
Crystal oscillator input
O
Crystal oscillator output
O
Regulator (1.9V) output
O
Charge pump output
O
Antenna switch-controlled supply voltage to active antenna
I
LNA input
I
Antenna detector current sense input
O
Supply voltage (active antenna)
O
LNA output
P
Supply voltage (analog circuitry)
G
Ground (analog circuitry)
I
Mixer input
O
Band gap reference (1.23V) output
O
O
input
I
I
input
I
Reference frequency mode select input
AGCCAP I/O AGC capacitor connection. Sets the AGC time constant.
P1
I
P0
I
AOK
O
3
-
CP
TVSS
TVDD
4
5
6
3
4
5
XEN
I
7
6
XI
XO
VB
PLL
AON
LNI
ISNS
PVDD
LNO
AVDD
AVSS
RFIN
VBG
IF1P
IF1N
IF2P
IF2N
MODE
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
7
-
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
-
23
24
-
Differential mixer IF output/differential first-stage IF amplifier
Differential first-stage IF amplifier output/differential IF AGC
Power-down control pins (see PT9120 operating modes)
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