전자부품 데이터시트 검색엔진 |
|
AD7002AS 데이터시트(PDF) 5 Page - Analog Devices |
|
AD7002AS 데이터시트(HTML) 5 Page - Analog Devices |
5 / 16 page AD7002 –5– REV. B GMSK Phase Trajectory Error This is a measure of the phase error between the transmitted phase of an ideal GMSK modulator and the actual phase trans- mitted by the AD7002, when transmitting a random sequence of data bits. It is specified as a peak phase error and also as an rms phase error. Group Delay Linearity The group delay linearity, or differential group delay, is the group delay over the full band relative to the group delay at one particular frequency. The reference frequency for the AD7002 is 1 kHz. Group Delay Between Channels This is the difference between the group delay of the I and Q channels and is a measure of the phase matching characteristics of the two. Integral Nonlinearity This is the maximum deviation from a straight line passing through the endpoints of the DAC or ADC transfer function. Maximum Phase Effect Instance This is the time at which a transmitted data bit will have its maximum phase change at the ITx and QTx outputs (see fig- ure). This time includes the delay in the GMSK modulator and in the Analog low-pass filters. Maximum phase effect instance is measured from the Tx CLK falling edge, which latches the data bit, to the ITx and QTx analog outputs. 90 ° 0 ° ≈ 9µs DATA BIT CLOCKED IN BY TxCLK MAXIMUM PHASE EFFECT INSTANT 45 ° Transmit Channel Maximum Phase Effect Instance Output Rate This is the rate at which data words are made available at the Rx DATA pin (Mode 0) or the IDATA and QDATA pins (Mode 1). There are two rates, depending on whether the de- vice is operated in RATE0 or RATE1. Offset Error This is the amount of offset, w.r.t. VREF in the transmit DACs and the auxiliary DACs and is expressed in mVs for the Trans- mit section and in LSBs for the Auxiliary section. Output Impedance This is a measure of the drive capability of the auxiliary DAC outputs and is expressed in k Ωs. Output Signal Span This is the output signal range for the Transmit Channel section and the Auxiliary DAC section. For the transmit channel the span is ±1.25 volts centered on 2.5 volts, and for the Auxiliary DAC section it is 0 to +VREF. Output Signal Full-Scale Accuracy This is the accuracy of the full-scale output (all 1s loaded to the DACs) on each transmit channel measured w.r.t. 25 V and is expressed in dBs. Phase Matching Between Channels This is a measure of the phase matching characteristics of the I and Q transmit channels. It is obtained by transmitting all ones and then measuring the difference between the actual phase shift between the I and Q outputs and the ideal phase shift of 90 °. Sampling Rate This is the rate at which the modulators on the receive channels sample the analog input. Settling Time This is the digital filter settling time in the AD7002 receive section. On initial power-up, or after returning from the sleep mode, it is necessary to wait this amount of time to obtain use- ful data. Signal Input Span The input signal range for the I and Q channels is biased about VREF. It can go ±1.25 volts about this point. Signal to (Noise + Distortion) Ratio This is the measured ratio of signal-to-(noise + distortion) at the output of the receive channel. The signal is the rms amplitude of the fundamental. Noise is the rms sum of all amplitude of the fundamental. Noise is the rms sum of all nonfundamental sig- nals up to half the sampling frequency (fS/2), excluding dc. The ratio is dependent upon the number of quantization levels in the digitization process; the more levels, the smaller the quantiza- tion noise. The theoretical signal-to-(noise+distortion) ratio for a sine wave is given by: Signal to (Noise + Distortion) = (6.02N + 1.76) dB |
유사한 부품 번호 - AD7002AS |
|
유사한 설명 - AD7002AS |
|
|
링크 URL |
개인정보취급방침 |
ALLDATASHEET.CO.KR |
ALLDATASHEET 가 귀하에 도움이 되셨나요? [ DONATE ] |
Alldatasheet는? | 광고문의 | 운영자에게 연락하기 | 개인정보취급방침 | 링크교환 | 제조사별 검색 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 |