Electronic Components Datasheet Search |
|
LTC1164-6CN Datasheet(PDF) 7 Page - Linear Technology |
|
LTC1164-6CN Datasheet(HTML) 7 Page - Linear Technology |
7 / 12 page 7 LTC1164-6 PI FU CTIO S level threshold value for a dual or single supply operation. A pulse generator can be used as a clock source provided the high level ON time is greater than 0.5 µs.Sinewavesare not recommended for clock input frequencies less than 100kHz, since excessively slow clock rise or fall times generate internal clock jitter (maximum clock rise or fall time ≤ 1µs). The clock signal should be routed from the right side of the IC package to avoid coupling into any input or output analog signal path. A 1k resistor between clock source and pin 11 will slow down the rise and fall times of the clock to further reduce charge coupling, Figures 1 and 2. Analog Ground Pins (3, 5) The filter performance depends on the quality of the analog signal ground. For either dual or single supply operation, an analog ground plane surrounding the pack- age is recommended. The analog ground plane should be connected to any digital ground at a single point. For dual supply operation, pins 3 and 5 should be connected to the analog ground plane. For single supply operation pins 3 and 5 should be biased at 1/2 supply and they should be bypassed to the analog ground plane with at least a 1 µF capacitor (Figure 2). For single 5V operation at the highest fCLK of 1MHz, pins 3 and 5 should be biased at 2V. This minimizes passband gain and phase variations (see Typi- cal Performance Characteristics curves: Maximum Pass- band for Single 5V, 50:1; and THD + Noise vs RMS Input for Single 5V, 50:1). Elliptic/Linear Phase Select Pin (10) The DC level at this pin selects the desired filter response, elliptic or linear phase and determines the ratio of the clock frequency to the cutoff frequency of the filter. Pin 10 connected to V – provides an elliptic lowpass filter with clock-to-fCUTOFF ratio of 100:1. Pin 10 connected to analog ground provides a linear phase lowpass filter with a clock- to-f–3dB ratio of 160:1 and a transient response overshoot of 1%. When pin 10 is connected to V + the clock-to-fCUTOFF ratio is 50:1 and the filter response is elliptic. Bypassing pin 10 to analog ground reduces the output DC offsets. If the DC level at pin 10 is switched mechanically or electrically at slew rates greater than 1V/ µs while the device is operating, a 10k resistor should be connected between pin 10 and the DC source. Filter Input Pin (2) The input pin is connected internally through a 50k resis- tor tied to the inverting input of an op amp. Filter Output Pins (9, 6) Pin 9 is the specified output of the filter; it can typically source or sink 1mA. Driving coaxial cables or resistive loads less than 20k will degrade the total harmonic distor- tion of the filter. When evaluating the device’s distortion an output buffer is required. A noninverting buffer, Figure 3, 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VIN V+ 1k V– VOUT LTC1164-6 DIGITAL SUPPLY + GND CLOCK SOURCE * 1164-6 F01 * OPTIONAL 0.1 µF 0.1 µF Figure 1. Dual Supply Operation for fCLK/fCUTOFF = 100:1 Figure 2. Single Supply Operation for fCLK/fCUTOFF = 100:1 1 2 3 4 5 6 7 14 13 12 11 10 9 8 VIN V+ 1k VOUT DIGITAL SUPPLY + GND CLOCK SOURCE 1164-6 F02 + LTC1164-6 0.1 µF 1 µF 10k 10k Table 1. Clock Source High and Low Threshold Levels POWER SUPPLY HIGH LEVEL LOW LEVEL Dual Supply = ±7.5V ≥ 2.18V ≤ 0.5V Dual Supply = ±5V ≥ 1.45V ≤ 0.5V Dual Supply = ±2.5V ≥ 0.73V ≤ – 2.0V Single Supply = 12V ≥ 7.80V ≤ 6.5V Single Supply = 5V ≥ 1.45V ≤ 0.5V (14-Lead Dual-In-Line Package) |
Similar Part No. - LTC1164-6CN |
|
Similar Description - LTC1164-6CN |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |