LTC1066-1CS Linear Technology, LTC1066-1CS Datasheet
LTC1066-1CS
Specifications of LTC1066-1CS
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LTC1066-1CS Summary of contents
Page 1
... For frequencies up to 0.75f ±0.15dB. The gain at f stopband attenuation is 80dB at 2.3f operation is also available with a clock-to-cutoff frequency ratio of 100:1 when pin 8 is connected to ground. The LTC1066-1 is available in an 18-pin SO Wide package. 20k 18 + OUT ...
Page 2
... CLK TEST f = 2MHz 80kHz CLK TEST f = 4MHz 160kHz CLK TEST U W TOP VIEW ORDER PART + 18 V NUMBER 17 OUT B 16 +IN B LTC1066-1CSW 15 GND 14 FILTER IN 13 COMP 2 12 CONNECT 2 11 COMP 1 – PACKAGE = 110°C, θ = 75°C/W JA http://www.linear.com/leadfree/ = ±7.5V, S MIN TYP MAX ● ...
Page 3
... S = ± ±7. Note 2: The maximum current over temperature is at 0°C. At 70°C the maximum current is less than its maximum value at 25°C. Note 3: Guaranteed by design and test correlation. LTC1066-1 = ±7.5V, S MIN TYP MAX UNITS ● – 1.75 – 1.25 – 0.50 ● ...
Page 4
... LTC1066 TYPICAL PERFOR A Gain vs Frequency = ±7.5V 50:1 S CLK 5MHz CLK –10 – 500kHz CLK –30 –40 –50 –60 = ±7.5V – 25°C – 50:1 CLK C –90 COMPENSATION –100 = 30k, 15pF f = 2.5MHz CLK –110 1k 10k 100k 1M FREQUENCY (Hz) 1066-1 G01 Passband Gain and Phase ...
Page 5
... CLK – 50:1 CLK C (5 REPRESENTATIVE –60 UNITS) –65 –70 –75 –80 –85 – FREQUENCY (kHz) LTC1066-1 Phase Matching vs Frequency 1.25 PHASE DIFFERENCE BETWEEN ANY TWO UNITS (SAMPLE OF 50 REPRESENTATIVE UNITS) A 1.00 ≥ ±5V 25° ≤ 2.5MHz f CLK B 0.75 0. ELLIPTIC RESPONSE ...
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... LTC1066 TYPICAL PERFOR A Power Supply Current vs Power Supply Voltage 30 27 0°C 24 25°C 70° TOTAL POWER SUPPLY VOLTAGE (V) 1066-1 G18 Table 1. Elliptic Response 10kHz ±7.5V 20k 1µ Compensation 25°C A FREQUENCY GAIN PHASE (kHz) (dB) (DEG) 2.000 0.117 – 50.09 3.000 0.118 – 75.75 4 ...
Page 7
... Low noise linear sup- plies are recommended. Switching power supplies are not recommended as they will lower the filter dynamic range. When the LTC1066-1 is powered up with dual supplies + and applied prior to a floating V diode (1N4148) between pin 10 and ground to prevent power supply reversal and latch-up ...
Page 8
... LTC1066 PIN FUNCTIONS (see Block Diagram). Input bias current flows out of pins 2 and 3. Pin 16 (+ the positive input of a high performance op amp B which is internally connected as a unity-gain follower. Op amp B buffers the switched- capacitor network output. The input capacitance of both op amps is 10pF. Pin 14 (FILTER ...
Page 9
... CONNECT 1 COMP FILTER CONNECT 2 OUT 30k 8 11 50/100 COMP – CLK V LTC1066-1 – HIGH SPEED 17 OP AMP + OUT B 16 +IN B PATENT PENDING 11066-1 BD 20Ω 0.1µF NOTE: RC COMPENSATION BETWEEN PINS 11 AND 13 IS REQUIRED ONLY FOR CLOCK-TUNABLE OPERATION FOR: ≤ 100kHz. ...
Page 10
... U U APPLICATIONS INFORMATION DC PERFORMANCE The DC performance of the LTC1066-1 is dictated by the DC characteristics of the input precision op amp input voltages in the vicinity of the filter’s half of the total power supply are processed with exactly 0dB (or 1V gain. 2. The typical DC input voltage ranges are equal to: = ± ...
Page 11
... U U APPLICATIONS INFORMATION AC PERFORMANCE AC (Passband) Gain The passband gain of the LTC1066-1 is equal to the passband gain of the internal switched-capacitor lowpass filter, and it is measured 0.25f CUTOFF tional monolithic filters, the LTC1066-1 starts with an absolutely perfect 0dB DC gain and phases into an “imper- fect” AC passband gain, typically ±0.1dB. ...
Page 12
... Most of its fre- quency contents lie within the filter passband and cannot be reduced with post filtering. For instance, the LTC1066- 1 wideband noise at ±5V supply is 100µV which have frequency contents from the filter’s OUTPUT cutoff frequency. The total wideband noise (µ ...
Page 13
... Figure 6 shows the LTC1066-1 aliasing response when operated with a clock-to-cutoff frequency ratio of 50:1. With a 50:1 ratio LTC1066-1 samples its input twice during one clock period and the sampling frequency is equal to two times the clock frequency. The figure also shows the maximum aliased output gener- ± ...
Page 14
... UUPIC 330MCRIGS OR NIC NACEN 33M16V 6.3 × 5.5 OR EQUIVALENT). * PROTECTION DIODES, 1N4148 ARE OPTIONAL. SEE PIN DESCRIPTIONS. 14 Dual Supply Operation 50:1 CLK C 100k 33µ OUT –IN A OUT + – V GND LTC1066 FILTER IN 1N4148 CONNECT 1 COMP FILTER CONNECT 2 OUT 8 11 50/100 COMP 1 200Ω – CLK V CUTOFF 20Ω ...
Page 15
... OUT B 3 + – V GND LTC1066 FILTER IN 6 0.1µF CONNECT 1 COMP 2 7 FILTER CONNECT 2 OUT 8 5V 50/100 COMP 1 200Ω 9 – CLK V CLK LTC1066 0.1µF V OUT 10k 1µF 10k 30k 13 12 15pF 11 10 ≥ 24kHz. CUTOFF 1066-1 TA04 10661fa 15 ...
Page 16
... ORDER ANTI-ALIASING FILTER 0.707• 17.946•R1 10•C1 –3dB 2π(R1 + R2)C1 FOR CUTOFF FREQUENCIES 2kHz TO 5kHz, SET 1µF AND ≤ FOR CUTOFF FREQUENCIES <2kHz, SET FOR EXAMPLE: IF THE CUTOFF FREQUENCY OF LTC1066-1 IS 500Hz, THEN f = 1000Hz –3dB 1 = 2Hz, SET R = 80.6k 1µF AND C1 = 0.0027µ 2π ...
Page 17
... OUT – +IN A 20Ω 4 – 0.1µF 7. CONNECT 1 0.1µF 7 FILTER 8 50/100 9 CLK f CLK LTC1066-1 20k 7.5V 20Ω OUT B V OUT 16 0.1µF + GND LTC1066-1 14 FILTER IN 13 COMP 2 12 CONNECT 2 OUT 11 COMP 1 10 – V –7.5V 0.1µF 1066-1 TA06 10661fa 17 ...
Page 18
... 0.1µ 0.1µF 200Ω CLOCK INPUT (TTL OR CMOS) COMPONENT CALCULATIONS FOR A CLOCK-TUNABLE RANGE OF FIVE OCTAVES: DEFINITIONS: 1. THE CUTOFF FREQUENCY OF LTC1066-1 IS ABBREVIATED THE LOWEST CUTOFF FREQUENCY OF INTEREST C(LOW RANGE OF FIVE OCTAVES IS FROM f COMPONENT CALCULATIONS C(LOW 2πR C 125 C(LOW) 1 µ Hz C(LOW) ...
Page 19
... NOTE 3 N .093 – .104 × 45° (2.362 – 2.642) 0° – 8° TYP .050 (1.270) BSC .014 – .019 (0.356 – 0.482) TYP LTC1066-1 .447 – .463 (11.354 – 11.760) NOTE .394 – .419 (10.007 – 10.643) N/2 3 ...
Page 20
... McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● (Not DC Accurate OUT 100Ω 17 –IN A OUT B 16 0.1µF + – V GND LTC1066 FILTER IN 13 CONNECT 1 COMP 2 12 FILTER CONNECT 2 20pF 30k OUT 11 50/100 COMP 1 10 – CLK V –8V 0.1µ ...