LT6604 Linear Technology Corporation, LT6604 Datasheet
LT6604
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LT6604 Summary of contents
Page 1
... The LT6604-5 enables level shifting by providing an adjustable output common mode voltage, making it ideal for directly interfacing to ADCs. The LT6604-5 is fully specifi ed for 3V operation. The dif- ferential design enables outstanding performance signal level for a single 3V supply. ...
Page 2
... LT6604CUFF-5#PBF LT6604CUFF-5#TRPBF LT6604IUFF-5#PBF LT6604IUFF-5#TRPBF Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. Consult LTC Marketing for information on non-standard lead based fi nish parts. ...
Page 3
... R = 800Ω 2nd Harmonic 3rd Harmonic 1MHz IN P-P IN Measured Between OUT+ and OUT–, V Shorted to V OCM Average of IN+ and IN– LT6604-5 + – 5V 0V 806Ω, and S IN MIN TYP MAX 0.05 0.7 l 0.005 0.1 l 0.01 0.2 l 0.03 0.5 l 0.05 ...
Page 4
... Note 7: The LT6604C-5 is guaranteed to meet 0°C to 70°C specifi cations and is designed, characterized and expected to meet the extended temperature limits, but is not tested at –40°C to 85°C. The LT6604I-5 is guaranteed to meet specifi ed performance from –40°C to 85°C. Note 8: Input pins (+IN, –IN ...
Page 5
... HARMONIC SINGLE-ENDED INPUT, 3RD HARMONIC –80 –90 –100 800Ω 25°C, GAIN = –110 10 0.1 1 FREQUENCY (MHz) LT6604-5 Passband Gain and Group Delay 13 120 GAIN 110 12 11 100 DELAY GAIN = 4 ...
Page 6
... LT6604-5 TYPICAL PERFORMANCE CHARACTERISTICS Distortion vs Signal Level –40 3RD HARMONIC –50 5MHz INPUT –60 2ND HARMONIC 5MHz INPUT –70 3RD HARMONIC –80 1MHz INPUT 2ND HARMONIC –90 1MHz INPUT –100 800Ω 25°C, GAIN = –110 ...
Page 7
... Output Pins. Pins 19 and 21 are the fi lter differential outputs for channel B. With a typical short-circuit current limit greater than ±40mA, each pin can drive a 100Ω and/or 50pF load to AC ground. LT6604-5 Channel Separation vs Frequency (Note ...
Page 8
... LT6604-5 PIN FUNCTIONS +OUTA, – OUTA (Pins 27, 29): Output Pins. Pins 27 and 29 are the fi lter differential outputs for channel A. With a typical short-circuit current limit greater than ±40mA, each pin can drive a 100Ω and/or 50pF load to AC ground. V (Pin 34): The V ...
Page 9
... The average of V and V is the common mode input IN IN voltage. Similarly, the voltages V OUT at Pins 27 and 29 of the LT6604-5 are the fi lter outputs. + The difference between V and V OUT + output voltage. The average of V OUT mon mode output voltage. Figure 1 illustrates the LT6604-5 operating with a single 3 ...
Page 10
... The 4:1 turns (16:1 impedance) transformer and the two 402Ω resistors of Figure 5, present the output of the LT6604-5 with a 1600Ω differential load, or the equivalent of 800Ω to ground at each output. The impedance seen by the network analyzer input is still 50Ω ...
Page 11
... Characteristics”). Common Mode DC Currents = 25° applications like Figure 1 and Figure 3 where the LT6604-5 = 85°C A not only provides lowpass fi ltering but also level shifts the common mode voltage of the input signal, DC currents will be generated through the DC path between input and output terminals ...
Page 12
... The LT6604-5 amplifi ers combine high speed with large signal currents in a small package. There is a need to en- sure that the die’s junction temperature does not exceed 150°C. The LT6604-5 has an exposed pad (pin 35) which is connected to the lower supply ( ground plane helps to dissipate the heat generated by the chip ...
Page 13
... Q OUT 20 806Ω 15 GAIN = OUT 0 LT6604-5 • θ • 2 • 0.0322 5MHz Phase Distribution (50 Units) –135 –134.5 –134 –133.5 –133 –132.5 –132 –131.5 ...
Page 14
... LT6604 OUT – 806Ω 7 0.1μF – OUT + 0.1μ 806Ω – 1/2 LT6604 OUT – 806Ω 24 0.1μF 66045 TA03 – V Transient Response ) OUT INPUT ) IN 66045 TA04b 100ns/DIV 66045f ...
Page 15
... BSC 6.00 REF 6.10 ± 0.05 7.50 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED R = 0.10 0.75 ± 0.05 TYP 6.00 REF R = 0.125 0.200 REF TYP 0.00 – 0.05 LT6604-5 0.70 ± 0.05 PACKAGE OUTLINE 1.29 ± 0.05 PIN 1 NOTCH R = 0.30 OR 0.25 × 45° CHAMFER 1.50 REF 33 34 0.40 ± 0. 1.90 ± 0.10 1.47 ± ...
Page 16
... LT6604-2.5 Dual Very Low Noise, Differential Amplifi er and 2.5MHz Lowpass Filter LT6604-10 Dual Very Low Noise, Differential Amplifi er and 10MHz Lowpass Filter LT6604-15 Dual Very Low Noise, Differential Amplifi er and 15MHz Lowpass Filter Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 ...