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参数资料
| 型号： | MAX3946ETG+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 4/29页 |
| 文件大小： | 0K |
| 描述： | IC LASER DVR SFP 11.3GBPS 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 类型： | 激光二极管驱动器 |
| 数据速率： | 11.3Gbps |
| 通道数： | 1 |
| 电源电压： | 2.85 V ~ 3.63 V |
| 电流 - 电源： | 68mA |
| 电流 - 调制： | 80mA |
| 电流 - 偏置： | 80mA |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 托盘 |
| 安装类型： | 表面贴装 |
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1Gbps to 11.3Gbps, SFP+ Laser Driver
with Laser Impedance Mismatch Tolerance
ELECTRICAL CHARACTERISTICS (continued)
(V CC = +2.85V to +3.63V, T A = -40°C to +85°C, and Figure 1. Guaranteed by design and characterization from T A = -40°C to +95°C.
Typical values are at V CC = +3.3V, I BIAS = 60mA, I MOD = 40mA, 25 I differential output load, and T A = +25°C, unless otherwise
noted.) (Note 2)
PARAMETER
Random Jitter
Differential Output Return Loss
SYMBOL
RJ
SDD22
CONDITIONS
10mA P I MOD P 80mA, output differential
load = 25 I (Note 2)
Part powered on, f P 5GHz
Part powered on, f P 10GHz
MIN
T Y P
0.19
8
6
MAX
0.55
UNITS
ps RMS
dB
SAFETY FEATURES
FAULT always occurs for V BMAX R 1.3V,
Threshold Voltage at BMAX
V BMAX
FAULT never occurs for V BMAX < 1.1V
1.1
1.2
1.3
V
(Note 2, Figure 1)
Threshold Voltage at BIAS
Threshold Voltage at BMON
V BIAS
V BMON
FAULT never occurs for V BIAS R 0.57V,
FAULT always occurs for V BIAS < 0.44V
Warning always occurs for V BMON R
V CC - 0.5V, warning never occurs for
V BMON < V CC - 0.7V
0.44
V CC -
0.7
0.48
V CC -
0.6
0.57
V CC -
0.5
V
V
SFP TIMING REQUIREMENTS
Time from rising edge of DISABLE input
DISABLE Assert Time
t _OFF
signal to I BIAS < I BIAS-OFF and I MOD <
0.05
1
F s
I MOD-OFF
DISABLE Negate Time
FAULT Reset Time of Power-On
Time
FAULT Reset Time
DISABLE to Reset
t _ON
t _INIT
t _FAULT
Time from falling edge of DISABLE to I BIAS
and I MOD at 90% of steady state
Time from power-on or negation of FAULT
using DISABLE
Time from fault to FAULT on, C FAULT P
20pF, R FAULT = 4.7k I
Time DISABLE must be held high to reset
FAULT
0.5
0.5
50
0.5
5
200
2
F s
F s
F s
F s
BIAS CURRENT DAC
Full-Scale Current
I BIAS-FS
SET_IBIAS[8:1] = HxFF
80
100
mA
LSB Size
190
F A
Integral Nonlinearity
Differential Nonlinearity
INL
DNL
5mA P I BIAS P 80mA
5mA P I BIAS P 80mA, guaranteed mono-
tonic at 8-bit resolution SET_IBIAS[8:1]
± 0. 5
± 0.5
%FS
LSB
MODULATION CURRENT DAC (25 I DIFFERENTIAL LOAD)
Full-Scale Current
I MOD-FS
SET_IMOD[8:1] = HxFF
80
105
mA
LSB Size
200
F A
Integral Nonlinearity
Differential Nonlinearity
INL
DNL
10mA P I MOD P 80mA
10mA P I MOD P 80mA, guaranteed mono-
tonic at 9-bit resolution SET_IMOD[8:0]
Q 1
Q 0.5
%FS
LSB
4
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