参数资料
| 型号： | MAX3799ETJ+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/36页 |
| 文件大小： | 0K |
| 描述： | IC AMP LIMITING VCSEL DVR 32TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 激光二极管驱动器 |
| 数据速率： | 14Gbps |
| 通道数： | 1 |
| 电源电压： | 2.85 V ~ 3.63 V |
| 电流 - 电源： | 97mA |
| 电流 - 调制： | 12mA |
| 电流 - 偏置： | 15mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-WFQFN 裸露焊盘 |
| 供应商设备封装： | 32-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
| 安装类型： | 表面贴装 |
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MAX3799
1Gbps to 14Gbps, SFP+ Multirate Limiting
Amplifier and VCSEL Driver
Dual Path Limiter
The limiting amplifier features a low data-rate mode
(1.25Gbps) and a high data-rate mode (up to
10.32Gbps), allowing for overall system optimization.
Either the RSEL pin or the RATE_SEL bit can perform
the rate selection. For operating up to 1.25Gbps, the
low data-rate mode (RATE_SEL = 0) is recommended.
For operation up to 14.025Gbps, the high data-rate
mode (RATE_SEL = 1) is recommended. The polarity of
the ROUT+/ROUT- relative to RIN+/RIN- is pro-
grammed by the RX_POL bit.
Offset Correction Circuitry
The offset correction circuit is enabled to remove pulse-
width distortion caused by intrinsic offset voltages with-
in the differential amplifier stages. An external capacitor
(C AZ ) connected between the CAZ1 and CAZ2 pins is
used to set the offset correction loop cutoff frequency.
The offset loop can be disabled using the AZ_EN bit.
CML Output Stage with Deemphasis
and Slew-Rate Control
The CML output stage is optimized for differential 100 ?
loads. The RXDE_EN bit adds analog deemphasis
compensation to the limited differential output signal for
SFP connector losses. The output stage is controlled by
a combination of the RX_EN and SQ_EN bits and the
LOS pin. See Table 1.
Amplitude of the CML output stage is controlled by an
8-bit DAC register (SET_CML). The differential output
amplitude range is from 40mV P-P up to 1200mV P-P with
4.6mV P-P resolution (assuming an ideal 100 ? differen-
tial load).
Table 1. CML Output Stage Operation Mode
Loss-of-Signal (LOS) Circuitry
The input data amplitude is compared to a preset
threshold controlled by the 6-bit DAC register
SET_LOS. The LOS assert level can be programmed
from 14mV P-P up to 77mV P-P with 1.5mV P-P resolution
(assuming an ideal 100 ? differential source). LOS is
enabled through the LOS_EN bit and the polarity of the
LOS is controlled with the LOS_POL bit.
VCSEL Driver
The VCSEL driver inside the MAX3799 is designed to
operate from 1.0625Gbps to 10.32Gbps. The transmit-
ter contains a differential data path with pulse-width
adjustment, bias current and modulation current DACs,
output driver with programmable deemphasis, power-
on reset circuitry, BIAS monitor, VCSEL current limiter,
and eye safety circuitry. A 3-wire digital interface is
used to control the transmitter functions. The registers
that control the transmitter functionality are TXCTRL,
TXSTAT1, TXSTAT2, SET_IBIAS, SET_IMOD, IMOD-
MAX, IBIASMAX, MODINC, BIASINC, MODECTRL,
SET_PWCTRL, and SET_TXDE.
Differential Data Path
The CML input buffer is optimized for AC-coupled sig-
nals and is internally terminated with a differential
100 ? . Differential input data is equalized for high-fre-
quency losses due to SFP connectors. The TX_POL bit
in the TXCTRL register controls the polarity of TOUT+
and TOUT- vs. TIN+ and TIN-. The SET_PWCTRL regis-
ter controls the output eye-crossing adjustment. A sta-
tus indicator bit (TXED) monitors the presence of an AC
input signal.
Table 2. Slew-Rate Control for CML
RX_EN
SQ_EN
LOS
OPERATION MODE
DESCRIPTION
Output Stage
RATE_SEL
OPERATION MODE DESCRIPTION
0
1
1
1
X
0
1
1
X
X
0
1
CML output disabled.
CML output enabled.
CML output enabled.
CML output disabled.
0
1
1.25Gbps operation with reduced output
edge speed.
Up to 10.32Gbps operation.
16
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX3799EVKIT+ | 功能描述:限幅放大器 Maxim Evaluation Kit RoHS:否 制造商:Micrel 输入电压范围（最大值）:3.6 V 工作电源电压:3.3 V 电源电流:40 mA 工作温度范围:- 40 C to + 85 C 封装 / 箱体:MSOP-10 封装:Tube |
| MAX379C/D | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX379CJE | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX379CPE | 功能描述:多路器开关 IC RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
| MAX379CPE+ | 功能描述:多路器开关 IC 4:1 2Ch Fault-Prtct Analog MUX RoHS:否 制造商:Texas Instruments 通道数量:1 开关数量:4 开启电阻（最大值）:7 Ohms 开启时间（最大值）: 关闭时间（最大值）: 传播延迟时间:0.25 ns 工作电源电压:2.3 V to 3.6 V 工作电源电流: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:UQFN-16 |
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