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參數(shù)資料
| 型號(hào)： | 5962-9208401MXX |
| 廠商： | ZARLINK SEMICONDUCTOR INC |
| 元件分類： | 模擬運(yùn)算功能 |
| 英文描述： | LOG OR ANTILOG AMPLIFIER, 190 MHz BAND WIDTH, MBCY8 |
| 封裝： | CM-8 |
| 文件頁(yè)數(shù)： | 2/6頁(yè) |
| 文件大小： | 544K |
| 代理商： | 5962-9208401MXX |
SL531
250MHz TRUE LOG IF AMPLIFIER
The SL531 C is a wide band amplifier designed for use in
logarithmic IF amplifiers of the true log type. The input and log
output of a true log amplifier are at the same frequency i e
detection does not occur. In successive detection log
amplifiers (using SL521 SL1521 types) the log output is
detected.
The small signal gain is 10dB and bandwidth is over
500MHz. At high signal levels the gain of a single stage
dropstounity. A cascade of such stages give a close
approximation to a log characteristic at centre frequencies
between 10and 200MHz.
An important feature of the device is that the phase shift is
nearly constant with signal level. Thus any phase information
on the input signal is preserved through the strip.
The device is also available as the 5962-92084 which has
guaranteed operation over the full Military Temperature
Range and is screened to MIL-STD-883 Class B. Data is
available separately
FEATURES
s
Low Phase Shift vs Amplitude
s
On-Chip Supply Decoupling
s
Low External Components Count
APPLICATIONS
True Log Strips with:-
s
Log Range
70dB
s
Centre frequencies
10 - 200MHz
s
Phase Shift
± 0.5 degrees / 10dB
ABSOLUTE MAXIMUM RATINGS
(Non-simultaneous)
Supply voltage
+12 volts
Storage temperature range
-65
°C to +150°C
Operating temperature range
-55
°C to +125°C
See operating notes
Max junction temperature
175
°C
Junction - ambient thermal resistance
220
°C/Watt
Junction - case thermal resistance
80
°C/Watt
CIRCUIT DESCRIPTION
The SL531 transfer characteristic has two regions For small
input signals it has a nominal gain of 10 dB. at large signals the
gain falls to unity (see Fig 7) This is achieved by operating a
limiting amplifier and a unity gain amplifier in parallel (see Fig
3) Tr1 and Tr4 comprise the long tailed pair limiting amplifier,
the tail current being supplied byTrS, see Fig 2 Tr2 and Tr3
form the unity gain amplifier the gain of which is defined by the
emitter resistors The outputs of both stages are summed in the
300 ohm resistor and Tr7 acts as an emitter follower output
buffer. Important features are the amplitude and phase
linearity of the unity gain stage which is achieved by the use
of 5GHz transistors with carefully optimised geometries.
Fig.1 Pin connections
CM8
Fig.2 Circuit diagram
Fig.3 Block diagram
ORDERING INFORMATION
5962-92084 (SMD)
SL531 C CM
DS3608 - 2.0
ADVANCE INFORMATION
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