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參數(shù)資料
| 型號： | SA624 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | High performance low power FM IF system with high-speed RSSI |
| 中文描述： | IF系統(tǒng)的高性能與低功耗調(diào)頻高速的RSSI |
| 文件頁數(shù)： | 4/15頁 |
| 文件大?。?/td> | 161K |
| 代理商： | SA624 |
Philips Semiconductors
Product specification
SA624
High performance low power FM IF system with
high-speed RSSI
1997 Nov 07
4
AC ELECTRICAL CHARACTERISTICS
Typical reading at T
A
= 25
°
C; V
CC
= +6V, unless otherwise stated. IF frequency = 455kHz; IF level = -47dBm; FM modulation = 1kHz with
+8kHz peak deviation. Audio output with C-message weighted filter and de-emphasis capacitor. Test circuit Figure 3. The parameters listed
below are tested using automatic test equipment to assure consistent electrical characterristics. The limits do not represent the ultimate
performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters.
LIMITS
SYMBOL
PARAMETER
TEST CONDITIONS
SA624
UNITS
MIN
TYP
MAX
Input limiting -3dB
Test at Pin 16
-92
dBm/50
AM rejection
80% AM 1kHz
30
34
dB
Recovered audio level
15nF de-emphasis
80
175
260
mV
RMS
mV
RMS
dB
Recovered audio level
150pF de-emphasis
530
THD
Total harmonic distortion
-34
-42
S/N
Signal-to-noise ratio
No modulation for noise
73
dB
RF level = -118dBm
0
160
650
mV
RSSI output
1
RF level = -68dBm
1.9
2.65
3.1
V
RF level = -18dBm
4.0
4.85
5.6
V
IF freq. = 455kHz
IF level = -44dBm
1.1
μ
s
μ
s
RSSI output rise time
IF level = -16dBm
1.2
(10kHz pulse, no IF filter)
IF freq. = 10.7MHz
IF level = -44dBm
1.2
μ
s
μ
s
IF level = -16dBm
1.1
IF freq. = 455kHz
IF level = -44dBm
1.3
μ
s
μ
s
RSSI output fall time
IF level = -16dBm
4.7
(10kHz pulse, no IF filter)
IF freq. = 10.7MHz
IF level = -44dBm
1.6
μ
s
IF level = -16dBm
4.2
μ
s
RSSI range
R
4
= 100k (Pin 5)
R
4
= 100k (Pin 5)
90
dB
RSSI accuracy
+1.5
dB
IF input impedance
1.4
1.6
k
k
k
IF output impedance
0.85
1.0
Limiter input impedance
1.4
1.6
Limiter output impedance
300
Limiter output level no load
280
mV
RMS
k
k
Unmuted audio output resistance
58
Muted audio output resistance
58
NOTE:
1. SA604 data sheets refer to power at 50
input termination; about 21dB less power actually enters the internal 1.5k input.
SA604 (50)
-97dBm
-47dBm
+3dBm
SA624 (1.5k)/SA605 (1.5k
-118dBm
-68dBm
-18dBm
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