參數(shù)資料
型號: MAX3768CUB+T
廠商: Maxim Integrated Products
文件頁數(shù): 2/17頁
文件大?。?/td> 0K
描述: IC AMP LIMITING 1.25GBPS 10-UMAX
產(chǎn)品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 2,500
類型: 限幅放大器
應用: 光纖學網(wǎng)絡
安裝類型: 表面貼裝
封裝/外殼: 10-TFSOP,10-MSOP(0.118",3.00mm 寬)
供應商設備封裝: 10-µMAX
包裝: 帶卷 (TR)
MAX3264/MAX3265/MAX3268/MAX3269/MAX3765/MAX3768
+3.0V to +5.5V, 1.25Gbps/2.5Gbps
Limiting Amplifiers
10
______________________________________________________________________________________
_______________Detailed Description
Figure 3 is a functional diagram of the MAX3264/
MAX3265/MAX3268/MAX3269/MAX3765/MAX3768 lim-
iting amplifiers. A linear input buffer drives a multistage
limiting amplifier and an RMS power-detection circuit.
Offset correction with lowpass filtering ensures low
deterministic jitter. The output buffer produces a limited
output signal. The MAX3264/MAX3265/MAX3765 pro-
duce a CML output, while the MAX3268/MAX3269/
MAX3768 produce a PECL-compatible output signal.
Schematics of these input/output circuits are shown in
Figures 4 through 7.
RMS Power Detect with
Loss-of-Signal Indicator
An RMS power detector looks at the signal from the
input buffer and compares it to a threshold set by the
TH resistor (see Typical Operating Characteristics for
appropriate resistor values). The signal-detect informa-
tion is provided to the LOS outputs, which are internally
terminated with 8k (MAX3265/MAX3269/MAX3765) or
16k (MAX3264/MAX3268/MAX3768) pullup resistors.
The LOS outputs meet TTL voltage specifications when
loaded with a resistor ≥ 4.7k.
CONTROL
GAIN
VCC
TH
VCC
RLOS = 8k (MAX3265/MAX3269/MAX3765)
RLOS = 16k (MAX3264/MAX3268/MAX3768)
LOS
RLOS
LOS
OUT+
OUT-
SQUELCH
LEVEL
INPUT
BUFFER
CAZ1
CAZ2
OFFSET
CORRECTION
100
IN+
IN-
MAX3264
MAX3265
MAX3268
MAX3269
MAX3765
MAX3768
LOW-
PASS
100pF
TOTAL GAIN = 55dB (MAX3264/MAX3268/MAX3768)
TOTAL GAIN = 49dB (MAX3265/MAX3269/MAX3765)
POWER DETECT
WITH
COMPARATOR
OUTPUT
BUFFER
TTL
Figure 3. Functional Diagram
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