View MAX9690_49219.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-2401; Rev 3; 3/97
Ultra-Fast ECL-Output Comparator
_______________General Description
The MAX9690 is an ultra-fast ECL comparator manufactured with a high-frequency bipolar process (fT = 6GHz) capable of very short propagation delays. This design maintains the excellent DC matching characteristics normally found only in slower comparators. The MAX9690 is similar in function to the MAX9685, except the latchenable input is eliminated. The MAX9690 is pin-compatible with the CMP-08 but exceeds the AC characteristics of that device. The MAX9690 has differential inputs and complementary outputs that are fully compatible with ECL-logic levels. Output current levels are capable of driving 50 terminated transmission lines. The ultra-fast operation makes signal processing possible at frequencies in excess of 600MHz.
____________________________Features
o 1.3ns Propagation Delay o +5V, -5.2V Power Supplies o Pin-Compatible with CMP-08 o Available in Commercial, Extended-Industrial, and Military Temperature Ranges o Available in Small-Outline Package
MAX9690
______________Ordering Information
PART MAX9690CPA-4 MAX9690CSA MAX9690CJA MAX9690EPA MAX9690ESA MAX9690MJA-4 TEMP. RANGE 0C to +70C 0C to +70C 0C to +70C -40C to +85C -40C to +85C -55C to +125C PIN-PACKAGE 8 Plastic DIP 8 SO 8 CERDIP 8 Plastic DIP 8 SO 8 CERDIP
________________________Applications
High-Speed A/D Converters High-Speed Line Receivers Peak Detectors Threshold Detectors
________________Functional Diagram
__________________Pin Configuration
TOP VIEW
IN+ Q OUT
INRL RL
Q OUT
V+ 1 IN+ 2 IN- 3
MAX9690
8 7 6 5
GND1 GND2 Q OUT Q OUT
VT
V- 4
DIP/SO
THE OUTPUTS ARE OPEN EMITTERS, REQUIRING EXTERNAL PULL-DOWN RESISTORS. THESE RESISTORS MAY BE WITHIN 50-200 CONNECTED TO -2.0V, OR 240-2k CONNECTED TO -5.2V.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 408-737-7600 ext. 3468.
Ultra-Fast ECL-Output Comparator MAX9690
ABSOLUTE MAXIMUM RATINGS
Supply Voltages.....................................................................6V Input Voltages........................................................................5V Differential Input Voltages...................................................3.5V Output Current ....................................................................30mA Continuous Power Dissipation (TA = +70C) Plastic DIP (derate 9.09mW/C above +70C)...........727mW SO (derate 5.88mW/C above +70C) .......................471mW CERDIP (derate 8.00mW/C above +70C) ...............640mW Operating Temperature Ranges MAX9690C_ A ...................................................0C to +70C MAX9690E_ A ................................................-40C to +85C MAX9690MJA ..............................................-55C to +125C Storage Temperature Range .............................-55C to +150C Lead Temperature (soldering, 10sec) .............................+300C
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.
ELECTRICAL CHARACTERISTICS
(V+ = +5V, V- = -5.2V, RL = 50, VT = -2V, TA = +25C, unless otherwise noted.) PARAMETER Input Offset Voltage Temperature Coefficient Input Offset Current Input Bias Current Input Voltage Range Common-Mode Rejection Ratio Power-Supply Rejection Ratio Input Resistance Input Capacitance SYMBOL VOS VOS/T IOS IB VCM CMRR PSRR RIN CIN (Note 1) TA = TMIN TA = TMAX TA = +25C TA = TMIN MAX9690E TA = TMAX TA = +25C MAX9690C, MAX9690M Logic Output Low Voltage VOL MAX9690E Positive Supply Current Negative Supply Current TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 20 TA = TMIN TA = TMAX TA = +25C TA = TMIN TA = TMAX TA = +25C 60 3 -1.05 -0.89 -0.96 -1.14 -0.88 -0.96 -1.83 -1.89 -1.85 -1.90 -1.83 -1.85 16 -0.87 -0.70 -0.81 -0.88 -0.70 -0.81 -1.57 -1.65 -1.65 -1.65 -1.57 -1.65 22 24 32 36 20 16 22 25 32 37 mA mA -1.82 -1.90 -1.85 -1.55 -1.65 -1.65 V -1.16 -0.88 -0.96 MAX9690C, MAX9690M Logic Output High Voltage VOH CONDITIONS TA = +25C TA = TMIN to TMAX (Note 1) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX (Note 1) (Note 1) MAX9690C/E MIN TYP MAX -5 5 -7 7 10 5 8 10 20 30 -2.5 +2.5 80 60 60 3 -0.89 -0.69 -0.81 V MAX9690M MIN TYP MAX -5 5 -8 8 15 5 12 10 20 40 -2.5 +2.5 80 60 UNITS mV V/C A A V dB dB k pF
2
_______________________________________________________________________________________
Ultra-Fast ECL-Output Comparator
SWITCHING CHARACTERISTICS
(V+ = +5V, V- = -5.2V, RL = 50, VT = -2V, TA = +25C, unless otherwise noted.) PARAMETER Input to Output High (Notes 1, 2) Input to Output Low (Notes 1, 2) SYMBOL CONDITIONS TA = +25C tpd+ TA = 0C to +70C TA = -55C to +125C TA = +25C tpdTA = 0C to +70C TA = -55C to +125C Note 1: Not tested, guaranteed by design. Note 2: VIN = 100mV, VOD = 10mV. 1.3 1.5 1.8 2.0 1.7 2.4 MAX9690C/E MIN TYP MAX 1.3 1.5 1.8 2.0 1.7 1.3 2.4 1.8 ns MAX9690M TYP MAX 1.3 1.8 ns UNITS
MAX9690
MIN
__________Applications Information
Layout
Because of the MAX9690's large gain-bandwidth characteristic, special precautions need to be taken if its highspeed capabilities are to be used. A PC board with a ground plane is mandatory. Mount all decoupling capacitors as close to the power-supply pins as possible, and process the ECL outputs in microstrip fashion, consistent with the load termination of 50 to 120. For low-impedance applications, microstrip layout at the input may also be helpful. Pay close attention to the bandwidth of the decoupling and terminating components. Chip components can be used to minimize lead inductance.
____________________Timing Diagram
The timing diagram illustrates the series of events that completes the compare function, under worst-case conditions. The leading edge of the input signal (illustrated as a large-amplitude, small-overdrive pulse) - - switches the comparator. Outputs Q and Q are similar in timing.
Definition of Terms
VOS Input Offset Voltage--The voltage required between the input terminals to obtain 0V differential at the output. Input Voltage Pulse Amplitude Input Voltage Overdrive Input to Output High Delay--The propagation delay measured from the time the input signal crosses the input offset voltage to the 50% point of an output low-to-high transition. Input to Output Low Delay--The propagation delay measured from the time the input signal crosses the input offset voltage to the 50% point of an output high-to-low transition.
Input Slew-Rate Requirements
As with all high-speed comparators, the high gain-bandwidth product of these devices creates oscillation problems when the input traverses through the linear region. For clean switching without oscillation or steps in the output waveform, the input must meet certain minimum slewrate requirements. The tendency of the part to oscillate is a function of the layout and source impedance of the circuit employed. Both poor layout and larger source impedance increase the minimum slew-rate requirement.
VIN VOD tpd+
tpd-
_______________________________________________________________________________________
3
Ultra-Fast ECL-Output Comparator MAX9690
DIFFERENTIAL INPUT VOLTAGE
VIN
VOS VOD
t pd Q 50%
Q
50%
Figure 1. Timing Diagram
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1997 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX9690

	To Download MAX9690 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .