LTC6603 Linear Technology, LTC6603 Datasheet
LTC6603
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LTC6603 Summary of contents
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... The selectivity of the LTC6603, combined with its linear phase, phase matching and dynamic range, make it suitable for fi ltering in many communications systems. With 1.5° phase matching between channels, the LTC6603 can be used in applications requiring pairs of matched fi ...
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... Output Short Circuit Duration........................... Indefi nite Operating Temperature Range (Note 2) LTC6603CUF .......................................–40°C TO 85°C LTC6603IUF ........................................–40°C TO 85°C Specifi ed Temperature Range (Note 3) LTC6603CUF ...........................................0°C TO 70°C LTC6603IUF ........................................–40°C TO 85°C Storage Temperature Range ................... –65°C to 150°C ORDER INFORMATION LEAD FREE FINISH ...
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... Pin 3 Open C IN P-P, )= 2.5MHz 3.6V Pin 3 Open C IN P-P, )= 2.5MHz 3.6V Pin 3 Open C IN P-P, )= 2.5MHz 3.6V Pin 3 Open 2.5MHz C LTC6603 www.DataSheet4U.com = V = 1.5V, Gain = 0dB, lowpass cutoff = ICM OCM MIN TYP MAX Pin 3 Open l 158 161 163 l –44 –39 –36 l –152 –146 –142 Pin 3 Open l ±0.2 ± ...
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... LTC6603 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T 2.5MHz, internal clocking with R = 30.9k unless otherwise noted. BIAS PARAMETER CONDITIONS V Differential Input Referred Differential Offset Voltage at Either Output OS Lowest Cutoff Frequency, Gain Setting = 24dB Highest Cutoff Frequency, Gain Setting = 24dB ...
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... Pins 6, 9, 21, 22 Pins 6, 9, 21, 22 Pins 6, 9, 21, 22 (Note 6) CONDITIONS Pins Pins Pins (Note 6) Pins 11, 21 Sourcing 500μA Pins 11, 21 Sinking 500μ 15pF L LTC6603 1.5V, Gain = 0dB, lowpass cutoff = OCM MIN TYP MAX UNITS ...
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... The LTC6603C is designed, characterized and expected to meet specifi ed performance from –40°C to 85°C but is not tested or QA sampled at these temperatures. The LTC6603I is guaranteed to meet the specifi ed performance limits from –40°C to 85°C. TYPICAL PERFORMANCE CHARACTERISTICS ...
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... LPF1 = 0, LPF0 = 625kHz –0.2 –0.3 –0.4 LPF1 = 2.5MHz –0.5 –0.6 –0 30.9k BIAS –0 25°C A –0.9 2.7 2.8 2.9 3.0 3.1 3.2 3.3 3.4 3.5 3.6 SUPPLY VOLTAGE (V) LTC6603 www.DataSheet4U.com Distortion vs Input Frequency 12.0 – 30.9k BIAS S 11.5 LPF1 = 2.5MHz 25°C 11.0 OUT P-P A –60 HD3, GAIN = 24dB 10.5 10.0 9.5 –70 9 ...
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... LTC6603 TYPICAL PERFORMANCE CHARACTERISTICS Common Mode Rejection Ratio 100 GAIN = 0dB 90 GAIN = 6dB 80 GAIN = 12dB 70 GAIN = 24dB 3V 30.9k S BIAS 30 LPF1 = 2.5MHz T = 25° 10k 100k 1M FREQUENCY (Hz) 6603 G15 Common Mode Rejection 100 CMR = ΔV /ΔV IN-CM OUT-DIFF 90 GAIN = 0dB ...
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... GAIN = 6dB 100 GAIN = 12dB GAIN = 24dB 3V 30.9k BIAS S LPF1 = 0, LPF0 = 625kHz T = 25° 10M 10k 100k 1M FREQUENCY (Hz) LTC6603 www.DataSheet4U.com Supply Current vs Supply Voltage 200 T = 25° 30.9k BIAS 180 BW = 2.5MHz 160 140 BW = 625kHz 120 100 BW = 156.25kHz 80 60 10M 2 ...
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... BIAS The value of the resistor connected between this pin and ground determines the frequency of the master oscillator, and sets the bias currents for the fi lter networks. The voltage on this pin is held by the LTC6603 to approximately 1.17V. 10 Integral Input Referred Noise 1000 ...
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... Channel A differential inputs. The input range and input resistance are described in the Applications Information section. Input voltages which exceed V+ (Pin 1) should be avoided. IN Exposed Pad (Pin 25): Ground. The Exposed Pad must be soldered to PCB. LTC6603 D 6603f 11 ...
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... LTC6603 BLOCK DIAGRAM +INA PIN OCM GND R 4 BIAS CLKCNTL 5 LPF1(CS +INB TIMING DIAGRAM SCLK D3 SDI SDO PREVIOUS BYTE 12 –INA GAIN1 GAIN0(D0 CHANNEL A GAIN LPF CONTROL BIAS CONTROL BIAS/OSC LOGIC ...
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... The se- D rial data is clocked to all the chips then the CS signal through the D is pulled high to update all of them simultaneously. Figure 4 shows an example of two LTC6603s in a daisy chained SPI confi guration. 3.3V LTC6603 0.1μF IN ...
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... D4 D3 LPF0 LPF1 NO FUNCTION NO FUNCTION www.DataSheet4U.com SHUTDOWN NO 4-BIT GAIN, BW FUNCTION CONTROL CODE OUT CS 8-BIT LATCH SDI 8-BIT SHIFT-REGISTER SDO SCLK 6603 F03 LTC6603 +INA +OUTA V OUT2 – –OUTA –INA SER LPF1(CS) GAIN0(D0) OUT2 LPF0(SCLK) ...
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... Self-Clocking Operation The LTC6603 features a unique internal oscillator which sets the fi lter cutoff frequency using a single external resistor connected to the R pin. The clock frequency is deter- BIAS mined by the following simple formula (see Figure 5 247.2MHz • 10k/R ...
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... The clock frequency, however, will increase monotonically 6603 G18 with decreasing V Operation Using an External Clock The LTC6603 may be clocked by an external oscillator for tighter bandwidth control by pulling CLKCNTL (Pin 5) to ground and driving a clock into CLKIO (Pin 15 external clock is used, the R The value of R would be required for using the internal oscillator ...
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... DATA FORMAT DATA IS SHIFTED FROM MOSI (MASTER OUT, SLAVE IN) THRU LTC6603 INTO THE LTC2621. THE TOTAL PACKET IS 32 BITS. IT STARTS WITH A CONTROL BYTE (0011 XXXX) THEN MSB OF THE DAC, WITH DUMMY BITS AT THE END, 16 BITS (24 BITS TOTAL). THEN 8 BITS TO THE FILTER. ...
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... Refer to the Typical Performance Characteristics section to estimate the distortion for a given input level. Dynamic Input Impedance The unique input sampling structure of the LTC6603 has a dynamic input impedance which depends on the confi guration and the clock frequency. This dynamic input impedance has both a differential component and a common mode component ...
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... The fi lter outputs can also be AC LTC6603 coupled. The LTC6603 can be interfaced to an A/D converter by pull- ing CLKCNTL (Pin clock output, which can be used to drive the clock +OUTA ...
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... OUT –OUTA V – –INA OUT V OCM GND /2 SUPPLY 0.1μF LTC6603 +OUTA +INA V + OUT –OUTA V – –INA OUT V OCM GND 6603 F12 LTC6603 SLAVE +INA +OUTA V OUT2 – –INA –OUTA CLKCNTL CLKIO GND 6603 F13 6603f ...
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... Aliasing is an inherent phenomenon of sampled data fi lters. Signifi cant aliasing only occurs when the frequency of the input signal approaches the sampling frequency or mul- tiples of the sampling frequency. The ratio of the LTC6603 input sampling frequency to the clock frequency, f determined by the state of control bits LPF1 and LPF0. ...
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... The power supply current during shutdown is less than 235μA. Supply Current vs. Noise Tradeoff The passband of the LTC6603 is determined by the master clock frequency (which is set by R oscillator is used), LPF1 and LPF0. The LTC6603 is op- timized for use with R ...
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... DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE, IF PRESENT 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE LTC6603 www.DataSheet4U.com LTC6603 SPI Clock Control ...
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... 56nH* 49.9Ω 19 +INA +OUTA 18 –INA –OUTA 7 13 +INB +OUTB 56nH* 49.9Ω LTC6603 –INB –OUTB CLKIO BIAS 100pF 3 17 SER V OCM 56nH* 49.9Ω CAP CLKCNTL 11 GAIN1 SDO 10 GAIN0(D0) SDI 9 GND LPFO(SCLK) ...