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参数资料
| 型号： | MAX2745ECM+D |
| 厂商： | Maxim Integrated |
| 文件页数： | 3/9页 |
| 文件大小： | 0K |
| 描述： | IC GPS RF FRONT END 48TQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 250 |
| RF 型： | GPS |
| 频率： | 1575.42MHz |
| 封装/外壳： | 48-TQFP 裸露焊盘 |
| 供应商设备封装： | 48-TQFP 裸露焊盘（7x7） |
| 包装： | 托盘 |
Single-Chip Global Positioning System
Receiver Front-End
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2745 EV kit, V DD = +2.4V to +3.6V, SHDN = GND, T A = -40 ° C to +85 ° C. Typical values are at V DD = +3.0V and T A = +25 ° C,
unless otherwise noted.)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
SYNTHESIZER
Crystal Input Frequency
Charge-Pump Current
Phase Noise
Maximum PLL Spur
Fundamental frequency crystal
3rd overtone crystal
f OFFSET = 10kHz offset,
BW LOOP = 70kHz
f OFFSET = 1MHz offset,
BW LOOP = 70kHz
BW LOOP = 70kHz
16.368
32.736
0.4
-81
-104
-39
MHz
mA
dBc/Hz
dBc
VCO Tuning Frequency Range
VCO Tuning Gain
(Notes 2, 3)
(Notes 2, 3)
150
150
210
210
270
310
MHz
MHz/V
IF STAGE
IF Stage Gain
Dynamic Range IF Stage Gain
Bandpass Filter 1dB Corner
Frequency
Bandpass Filter 3dB Bandwidth
Bandpass Filter 60dB High-Side
Rejection
Bandpass Filter 60dB Low-Side
Rejection
Image Rejection
In-Band Ripple
AGC Loop Lock Time
VGA set at maximum gain
Low-frequency corner
High-frequency corner
80
56
3.1
5.1
2.0
6.6
1.6
17
1
1
dB
dB
MHz
MHz
MHz
MHz
dB
dB
ms
Note 1: At T A = +25 ° C, min/max limits are guaranteed by production test.
Note 2: At T A = -40 ° C, min/max limits are guaranteed by design and characterization.
Note 3: At T A = +25 ° C and +85 ° C, min/max limits are guaranteed by production test.
Typical Operating Characteristics
(MAX2745 EV kit, V DD = +3.0V, SHDN = GND, f RF = 1575.42MHz, and T A = +25 ° C, unless otherwise noted.)
30
SUPPLY CURRENT vs. TEMPERATURE
40
35
LNA/MIXER GAIN vs. TEMPERATURE
100
95
IF STAGE GAIN vs. TEMPERATURE
26
30
V CC = 3V
90
22
V CC = 3V
V CC = 2.7V
25
85
V CC = 2.4V
20
80
18
14
V CC = 2.4V
15
10
V CC = 2.4V
V CC = 2.7V
75
70
V CC = 3V
V CC = 2.7V
5
65
10
0
60
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
-40
-20
0
20
40
60
80
TEMPERATURE ( ° C)
TEMPERATURE ( ° C)
TEMPERATURE ( ° C)
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3
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