• 參數(shù)資料
    型號(hào): AD8630WARZ-R7
    廠商: Analog Devices Inc
    文件頁數(shù): 8/24頁
    文件大?。?/td> 0K
    描述: IC OPAMP CHOPPER R-R QUAD 14SOIC
    標(biāo)準(zhǔn)包裝: 1
    放大器類型: 零漂移
    電路數(shù): 4
    輸出類型: 滿擺幅
    轉(zhuǎn)換速率: 1 V/µs
    增益帶寬積: 2.5MHz
    -3db帶寬: 2.5MHz
    電流 - 輸入偏壓: 100pA
    電壓 - 輸入偏移: 1µV
    電流 - 電源: 850µA
    電流 - 輸出 / 通道: 30mA
    電壓 - 電源,單路/雙路(±): 2.7 V ~ 5 V,±1.35 V ~ 2.5 V
    工作溫度: -40°C ~ 125°C
    安裝類型: 表面貼裝
    封裝/外殼: 14-SOIC(0.154",3.90mm 寬)
    供應(yīng)商設(shè)備封裝: 14-SOIC
    包裝: 標(biāo)準(zhǔn)包裝
    其它名稱: AD8630WARZ-R7DKR
    AD8628/AD8629/AD8630
    Data Sheet
    Rev. J | Page 16 of 24
    PEAK-TO-PEAK NOISE
    Because of the ping-pong action between auto-zeroing and
    chopping, the peak-to-peak noise of the AD8628/AD8629/
    AD8630 is much lower than the competition. Figure 50 and
    Figure 51 show this comparison.
    en p-p = 0.5V
    BW = 0.1Hz TO 10Hz
    TIME (1s/DIV)
    VO
    LT
    AG
    E
    (
    0.
    5
    V
    /DI
    V
    )
    02735-
    047
    Figure 50. AD8628 Peak-to-Peak Noise
    en p-p = 2.3V
    BW = 0.1Hz TO 10Hz
    TIME (1s/DIV)
    VO
    LT
    AG
    E
    (
    0.
    5
    V
    /DI
    V
    )
    02735-
    048
    Figure 51. Competitor A Peak-to-Peak Noise
    NOISE BEHAVIOR WITH FIRST-ORDER, LOW-PASS
    FILTER
    The AD8628 was simulated as a low-pass filter (see Figure 53)
    and then configured as shown in Figure 52. The behavior of the
    AD8628 matches the simulated data. It was verified that noise is
    rolled off by first-order filtering. Figure 53 and Figure 54 show
    the difference between the simulated and actual transfer functions
    of the circuit shown in Figure 52.
    470pF
    OUT
    100k
    IN
    1k
    02735-
    049
    Figure 52. First-Order Low-Pass Filter Test Circuit,
    ×101 Gain and 3 kHz Corner Frequency
    FREQUENCY (kHz)
    N
    O
    ISE
    (d
    B
    )
    50
    45
    40
    35
    30
    25
    15
    10
    5
    20
    0
    30
    60
    100
    90
    80
    70
    50
    40
    20
    10
    02735-
    050
    Figure 53. Simulation Transfer Function of the Test Circuit in Figure 52
    FREQUENCY (kHz)
    N
    O
    ISE
    (d
    B
    )
    50
    45
    40
    35
    30
    25
    15
    10
    5
    20
    0
    30
    60
    100
    90
    80
    70
    50
    40
    20
    10
    02735-
    051
    Figure 54. Actual Transfer Function of the Test Circuit in Figure 52
    The measured noise spectrum of the test circuit charted in
    Figure 54 shows that noise between 5 kHz and 45 kHz is
    successfully rolled off by the first-order filter.
    TOTAL INTEGRATED INPUT-REFERRED NOISE FOR
    FIRST-ORDER FILTER
    For a first-order filter, the total integrated noise from the
    AD8628 is lower than the noise of Competitor A.
    3dB FILTER BANDWIDTH (Hz)
    R
    MS
    N
    O
    ISE
    (
    V)
    10
    1
    0.1
    10
    100
    10k
    1k
    02735-
    052
    COMPETITOR A
    AD8551
    AD8628
    Figure 55. RMS Noise vs. 3 dB Filter Bandwidth in Hz
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