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參數(shù)資料
| 型號： | AD7495ARM-REEL |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 4/25頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC ADC 12BIT SRL LP W/REF 8MSOP |
| 標準包裝： | 3,000 |
| 位數(shù)： | 12 |
| 采樣率（每秒）： | 1M |
| 數(shù)據(jù)接口： | DSP，MICROWIRE?，QSPI?，串行，SPI? |
| 轉換器數(shù)目： | 1 |
| 功率耗散（最大）： | 10.5mW |
| 電壓電源： | 單電源 |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP，8-MSOP（0.118"，3.00mm 寬） |
| 供應商設備封裝： | 8-MSOP |
| 包裝： | 帶卷 (TR) |
| 輸入數(shù)目和類型： | 1 個單端，單極 |
AD7475/AD7495
Rev. B | Page 11 of 24
)
TERMINOLOGY
Integral Nonlinearity
The maximum deviation from a straight line passing through
the endpoints of the ADC transfer function. The endpoints of
the transfer function are zero scale, a point LSB below the
first code transition, and full scale, a point LSB above the last
code transition.
Differential Nonlinearity
The difference between the measured and the ideal 1 LSB
change between any two adjacent codes in the ADC.
Offset Error
The deviation of the first code transition (00 . . . 000) to
(00 . . . 001) from the ideal, that is, AGND + 0.5 LSB.
Gain Error
This is the deviation of the last code transition (111. . . 110) to
(111. . . 111) from the ideal (that is, VREF 1.5 LSB) after the
offset error has been adjusted out.
Track-and-Hold Acquisition Time
The track-and-hold amplifier returns into track mode on the
13
th SCLK rising edge (see the Serial Interface section). The
track-and-hold acquisition time is the minimum time required
for the track-and-hold amplifier to remain in track mode for its
output to reach and settle to within 0.5 LSB of the applied input
signal, given a step change to the input signal.
Signal-to-Noise and Distortion Ratio (SINAD)
The measured ratio of signal-to-noise and distortion at the
output of the analog-to-digital converter (ADC). The signal is
the rms amplitude of the fundamental. Noise is the sum of all
nonfundamental signals up to half the sampling frequency
(fS/2), excluding dc. The ratio is dependent on the number of
quantization levels in the digitization process; the more levels,
the smaller the quantization noise. The theoretical SINAD ratio
for an ideal N-bit converter with a sine wave input is given by
() (
dB
76
.
1
02
.
6
+
=
+
N
Distortion
Noise
to
Signal
For a 12-bit converter, the SINAD is 74 dB.
Total Harmonic Distortion (THD)
The ratio of the rms sum of harmonics to the fundamental. For
the AD7475/AD7495, THD is defined as
()
1
6
5
4
3
2
V
THD
2
log
20
dB
+
=
where V1 is the rms amplitude of the fundamental and V2, V3,
V4, V5, and V6 are the rms amplitudes of the second through the
sixth harmonics.
Peak Harmonic or Spurious Noise
The ratio of the rms value of the next largest component in
the ADC output spectrum (up to fS/2 and excluding dc) to
the rms value of the fundamental. Normally, the value of this
specification is determined by the largest harmonic in the
spectrum, but for ADCs where the harmonics are buried in
the noise floor, it is a noise peak.
Intermodulation Distortion
With inputs consisting of sine waves at two frequencies, fa and
fb, any active device with nonlinearities creates distortion
products at sum and difference frequencies of mfa ± nfb where
m, n = 0, 1, 2, 3, etc. Intermodulation distortion terms are those
for which neither m nor n is equal to zero. For example, the
second-order terms include (fa + fb) and (fa fb), while the
third-order terms include (2fa + fb), (2fa fb), (fa + 2fb), and
(fa 2fb).
The AD7475/AD7495 are tested using the CCIF standard where
two input frequencies near the top end of the input bandwidth
are used. In this case, the second-order terms are usually
distanced in frequency from the original sine waves while the
third order terms are usually at a frequency close to the input
frequencies. As a result, the second- and third-order terms are
specified separately. Like THD, intermodulation distortion is
calculated as the rms sum of the individual distortion products
to the rms amplitude of the sum of the fundamentals, expressed
in dBs.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD7495ARM-REEL7 | 制造商:Analog Devices 功能描述:ADC Single SAR 1Msps 12-bit Serial 8-Pin MSOP T/R 制造商:Analog Devices 功能描述:ADC SGL SAR 1MSPS 12-BIT SERL 8MSOP - Tape and Reel 制造商:Rochester Electronics LLC 功能描述:FAST 12-BIT LOW-POWER SERIAL ADC I.C. - Tape and Reel |
| AD7495ARMZ | 功能描述:IC ADC 12BIT SRL LP W/REF 8MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):12 采樣率（每秒）:300k 數(shù)據(jù)接口:并聯(lián) 轉換器數(shù)目:1 功率耗散（最大）:75mW 電壓電源:單電源 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:24-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:24-SOIC 包裝:帶卷 (TR) 輸入數(shù)目和類型:1 個單端，單極；1 個單端，雙極 |
| AD7495ARMZ3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1MSPS,12-Bit ADCs |
| AD7495ARMZ-REEL | 功能描述:IC ADC 12BIT SRL LP W/REF 8MSOP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 模數(shù)轉換器 系列:- 標準包裝:1,000 系列:- 位數(shù):16 采樣率（每秒）:45k 數(shù)據(jù)接口:串行 轉換器數(shù)目:2 功率耗散（最大）:315mW 電壓電源:模擬和數(shù)字 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應商設備封裝:28-SOIC W 包裝:帶卷 (TR) 輸入數(shù)目和類型:2 個單端，單極 |
| AD7495ARMZ-REEL3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:1MSPS,12-Bit ADCs |
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