LTC1412 Linear Technology, LTC1412 Datasheet
LTC1412
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LTC1412 Summary of contents
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... D11 (MSB) 12 • OUTPUT • BUFFERS • D0 (LSB) BUSY TIMING AND CS LOGIC CONVST DGND OGND 1412 TA01 LTC1412 12-Bit, 3Msps, U Effective Bits and Signal-to-Noise + Distortion vs Input Frequency 10k 100k 1M 10M INPUT FREQUENCY (Hz) ...
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... SS Digital Input Voltage (Note 4) ..........(V Digital Output Voltage ........ (V – 0.3V Power Dissipation .............................................. 500mW Operating Temperature Range LTC1412C................................................ LTC1412I ............................................ – Storage Temperature Range ................. – 150 C Lead Temperature (Soldering, 10 sec).................. 300 VERTER C HARA TERISTICS C PARAMETER ...
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... I = 160 4.75V 1.6mA High OUT DD CS High (Note OUT (Note 5) CONDITIONS (Note 10) (Note 10) CS High CS High LTC1412 MIN TYP MAX UNITS 72 – – – MHz 4 MHz MIN TYP ...
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... CONDITIONS (Notes 9, 10) (Note 10 25pF L (Note 10 25pF L LTC1412C LTC1412I Note 5V specified. A Note 6: Linearity, offset and full-scale specifications apply for a single- ended A input with A IN Note 7: Integral nonlinearity is defined as the deviation of a code from a straight line passing through the actual endpoints of the transfer curve. ...
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... FREQUENCY (kHz) Differential Nonlinearity vs Output Code 1.0 0.5 0 – 0.5 –1.0 0 512 1024 1536 2048 2560 3072 3584 4096 OUTPUT CODE LTC1412 Distortion vs Input Frequency 0 – 20 – 40 – 60 – 80 THD –100 3RD 2ND –120 10M 10 100 ...
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... LTC1412 W U TYPICAL PERFOR A CE CHARACTERISTICS Power Supply Feedthrough vs Ripple Frequency 0 – 20 – 40 – – 80 –100 –120 1k 10k 100k 1M RIPPLE FREQUENCY (Hz PIN FUNCTIONS + A (Pin 1): Positive Analog Input. 2.5V input range IN – when A is grounded. 2.5V differential driven. – A (Pin 2): Negative Analog Input. Can be grounded or ...
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... U U APPLICATIONS INFORMATION Conversion Details The LTC1412 uses a successive approximation algorithm and an internal sample-and-hold circuit to convert an analog signal to a 12-bit parallel output. The ADC is complete with a precision reference and an internal clock. The control logic provides easy interface to microproces- sors and DSPs. (Please refer to the Digital Interface section for the data format ...
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... ADC and is directly related to the S/( the equation [S/( – 1.76]/6.02 where N is the effective number of bits of resolution and S/( expressed in dB. At the maximum sampling rate of 3MHz the LTC1412 maintains near ideal ENOBs up to the Nyquist input frequency of 1.5MHz. Refer to Figure ...
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... V 1 where V1 is the RMS amplitude of the fundamental fre- quency and V2 through Vn are the amplitudes of the second through Nth harmonics. THD vs input frequency is shown in Figure 4. The LTC1412 has good distortion performance up to the Nyquist frequency and beyond. 0 – 20 – 40 – 60 – ...
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... The best choice for an op amp to drive the LTC1412 will IN depend on the application. Generally applications fall into two categories: AC applications where dynamic specifica- tions are most critical and time domain applications where DC accuracy and settling time are most critical ...
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... Figure 7b shows a simple implementa- tion using an LTC1560-1 fifth-order elliptic continuous time filter. Input Range The 2.5V input range of the LTC1412 is optimized for low + noise and low distortion. Most op amps also perform best IN over this same range, allowing direct coupling to the ana- log inputs and eliminating the need for special translation circuitry ...
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... The input span of the ADC can then be adjusted to match the peak input signal, maximizing the signal-to-noise ratio. The filtering of the internal LTC1412 reference amplifier will limit the bandwidth and settling time of this circuit. A settling time of 5ms should be allowed for after a reference adjustment. ...
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... IN flickers between 0111 1111 1110 and 0111 1111 1111. Board Layout and Bypassing To obtain the best performance from the LTC1412, a printed circuit board with ground plane is required. Layout for the printed circuit board should ensure that digital and analog signal lines are separated as much as possible. In particular, care should be taken not to run any digital line alongside an analog signal line ...
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... LTC1412 U U APPLICATIONS INFORMATION ...
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... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Figure 13b. Component Side Silkscreen LTC1412 Figure 13d. Solder Side 15 ...
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... LTC1412 PACKAGE DESCRIPTION 0.205 – 0.212** (5.20 – 5.38) 0.005 – 0.009 0.022 – 0.037 (0.13 – 0.22) (0.55 – 0.95) * DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE ** DIMENSIONS DO NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE ...