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Part: MAX3822UCM
Category:
Communication
-> Fiber Optics
Description: MAX3822 +3.3V, 2.5Gbps Quad Limiting Amplifier
Company: Maxim Integrated Products
Datasheet: Download MAX3822UCM datasheet File size : 711 kB
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Datasheet text preview:
19-2144; Rev 0; 8/01
+3.3V, 2.5Gbps Quad Limiting Amplifier
General Description
The MAX3822 quad limiting amplifier is ideal for multichannel systems with data rates up to 2.5Gbps. The MAX3822 operates from a single +3.3V supply, over temperatures ranging from 0°C to +85°C. A channelselect (CS) pin is provided to program single-, dual-, or quad-channel operation. The disabled channels are shut down to reduce power consumption. The output interface for all four channels is CML. The input can be driven from 20mVp-p to 1000mVp-p differentially. The threshold voltage control is common for all four channels and is programmable by an external resistor. Four separate power detectors are incorpor a t e d to monitor the received signal level for each channel. Individual TTL-compatible loss-of-power (LOP) indicators assert low if the channel signal input is below the programmed threshold. Typically 4dB LOP hysteresis (2dB optical) is provided to prevent chattering when the input signal level is close to the threshold. A general LOP indicator is also provided which asserts low if one or more of the four inputs is in the LOP condition. o Single +3.3V Supply o Single-, Dual-, or Quad-Channel Operation at 2.5Gbps o 700mW Total Power Dissipation (Quad-Channel Operation) o 120ps Maximum Output Edge Speed o Overall and Individual Channel Loss-of-Power (LOP) Indicator o Differential CML Outputs with On-Chip Back Termination Resistors o 30ps Maximum Deterministic Jitter o 2ps Random Jitter o Power-Down Feature Shuts Down Unused Channels o Operating Temperature Range: 0°C to +85°C
Features
MAX3822
Ordering Information
PART MAX3822UCM MAX3822U/D TEMP. RANGE 0°C to +85°C 0°C to +85°C PIN-PACKAGE 48 TQFP-EP* Dice**
Applications
Optical System Interconnects Multichannel Receiver Modules Dense Digital Cross-Connects ATM Switch Networks High-Speed Parallel Links
*Exposed pad **Contact factory for availability. Dice are designed to operate from TA = 0°C to TA = +85°C, but are tested and guaranteed only at TA = +25°C.
Pin Configuration
CZ1+ CZ2+ CZ1CZ2GND GND GND GND GND
39
48
47
46
45
44
43
42
41
40
38
Typical Operating Circuit appears at end of data sheet.
IN1+ IN1VCC IN2+ IN2VCC VCC IN3+ IN3VCC IN4+ IN41 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 36 35 34 33 32 31 30 29 28 27 26 25
37
GND
VTH
TOP VIEW
CS
OUT1+ OUT1VCC OUT2+ OUT2VCC VCC OUT3+ OUT3VCC OUT4+ OUT4-
MAX3822
CZ4-
CZ4+ GND
CZ3-
CZ3+
LOP1 LOP2
LOP3
TQFP-EP
________________________________________________________________ Maxim Integrated Products
LOP4
GND
GND
LOP
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
+3.3V, 2.5Gbps Quad Limiting Amplifier MAX3822
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC) .......... -0.5V to +6.0V Differential Input Voltage Swing (IN1+ - IN1-), (IN2+ - IN2-), (IN3+ - IN3-), (IN4+ - IN4-) ....2Vp-p Voltage at LOP1, LOP2, LOP3, LOP4, LOP, CS.......-0.5V to (VCC + 0.5V) Voltage at IN1+, IN1-, IN2+, IN2-, IN3+, IN3-, IN4+, IN4- .....(VCC - 1V) to (VCC + 0.5V) Voltage at VTH .....+0.5V to +2.3V Voltage at CZ1+, CZ1-, CZ2+, CZ2-, CZ3+, CZ3-, CZ4+, CZ4- ......-0.5V to (VCC + 0.5V) Current into OUT1+, OUT1-, OUT2+, OUT2-, OUT3+, OUT3-, OUT4+, OUT4-, ..........±22mA Continuous Power Dissipation (TA = +85°C) 48-Pin TQFP-EP (derate 29.4mW/°C above +85°C) ......2.35W Operating Junction Temperature Range(die) ...-55°C to +150°C Processing Temperature (die) ........+400°C Storage Temperature Range .....-55°C to +150°C Lead Temperature (soldering, 10s) .........+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 1)
PARAMETER Power-Supply Current Single-Ended Data Input Voltage Range Single-Ended Data Input Resistance Data Input Voltage for LOP Assert RTH = 1k RTH = 649 RTH = 400 RTH = 1k LOP Hysteresis CML Differential Output Single-Ended Data Output Resistance CML Output Common-Mode Voltage TTL Output High TTL Output Low VOH VOL Sourcing 200µA Sinking 2mA 2.4 VOD RTH = 649 RTH = 400 RL = 50 to VCC 640 40 3.0 3.4 740 50 VCC 0.2 VCC 0.4 1000 60 mVp-p V V V 11.5 SYMBOL ICC CONDITIONS Single channel (Note 2) Dual channel (Note 2) Quad channel VIS VCC 0.5 40 50 14 18.5 34 4.5 6.0 dB 32.5 mVp-p MIN TYP 60 110 210 MAX 72 137 265 VCC + 0.25 60 V mA UNITS
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+3.3V, 2.5Gbps Quad Limiting Amplifier
AC ELECTRICAL CHARACTERISTICS
(VCC = +3.0V to +3.6V, TA = 0°C to +85°C, unless otherwise noted. Typical values are at VCC = +3.3V and TA = +25°C.) (Notes 1, 3)
PARAMETER Data Input Voltage Range Random Jitter Deterministic Jitter Data Output Edge Speed LOP Assert/Deassert Time Input-Referred Noise Offset Correction LowFrequency Cutoff Channel-to-Channel Skew (Note 7) CZ1 = CZ2 = CZ3 = CZ4 = 0.033µF (Note 8) SYMBOL VIN (Note 4) VIN = 20mVp-p (Notes 5, 6) VIN = 1000mVp-p to 1000mVp-p (Notes 5, 6) (20% to 80%) 100 105 150 20 70 594 CONDITIONS MIN 20 2 8 4 90 30 120 TYP MAX 1000 9.5 UNITS mVp-p psRMS psp-p ps ns µVRMS kHz ps
MAX3822
Note 1: Note 2: Note 3: Note 4: Note 5: Note 6: Note 7: Note 8:
Characteristics at 0°C are guaranteed by design and characterization. Dice are tested at TA = +25°C. When power is first applied, all four channels are briefly active. AC characteristics are guaranteed by design and characterization. Input data edge speed of 150ps (20% to 80%). Data rate = 2.5Gbps. Measured with 213 -1 PRBS plus 100 consecutive identical digits. Deterministic jitter (p-p) equals total jitter (p-p) minus random jitter (p-p). Input-referred noise is specified (differential output noise)/(small-signal gain). Measured by applying the same input signal to all channels. Skew measurements are made at 50% point of the transition.
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