TIMING CHARACTERISTICS1, 2 Parameter A, B Versions Units Test Conditions/Comments
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      參數(shù)資料
      型號(hào): AD7895ANZ-3
      廠商: Analog Devices Inc
      文件頁(yè)數(shù): 6/12頁(yè)
      文件大?。?/td> 0K
      描述: IC ADC 12BIT SRL 5V 8DIP
      標(biāo)準(zhǔn)包裝: 50
      位數(shù): 12
      采樣率(每秒): 192k
      數(shù)據(jù)接口: 串行
      轉(zhuǎn)換器數(shù)目: 1
      功率耗散(最大): 20mW
      電壓電源: 單電源
      工作溫度: -40°C ~ 125°C
      安裝類(lèi)型: 通孔
      封裝/外殼: 8-DIP(0.300",7.62mm)
      供應(yīng)商設(shè)備封裝: 8-PDIP
      包裝: 管件
      輸入數(shù)目和類(lèi)型: 1 個(gè)單端,雙極
      AD7895
      –3–
      REV. 0
      TIMING CHARACTERISTICS1, 2
      Parameter
      A, B Versions
      Units
      Test Conditions/Comments
      t1
      40
      ns min
      CONVST
      Pulse Width
      t2
      352
      ns min
      SCLK High Pulse Width
      t3
      35
      2
      ns min
      SCLK Low Pulse Width
      t4
      60
      3
      ns max
      Data Access Time after Falling Edge of SCLK, VDD = 5 V ± 5%
      t5
      10
      ns min
      Data Hold Time after Falling Edge of SCLK
      t6
      50
      4
      ns max
      Bus Relinquish Time after Falling Edge of SCLK
      NOTES
      1 Sample tested at +25
      °C to ensure compliance. All input signals are measured with tr = tf = 1 ns (10% to 90% of +5 V) and timed from a voltage level of +1.4 V.
      2The SCLK maximum frequency is 15 MHz. Care must be taken when interfacing to account for the data access time, t
      4, and the setup time required for the user's
      processor. These two times will determine the maximum SCLK frequency that the user’s system can operate with. See “Serial Interface” section for more information.
      3 Measured with the load circuit of Figure 1 and defined as the time required for an output to cross 0.8 V or 2.0 V.
      4 Derived from the measured time taken by the data outputs to change 0.5 V when loaded with the circuit of Figure 1. The measured number is then extrapolated back
      to remove the effects of charging or discharging the 50 pF capacitor. This means that the time, t 6, quoted in the timing characteristics is the true bus relinquish time
      of the part and, as such, is independent of external bus loading capacitances.
      ABSOLUTE MAXIMUM RATINGS*
      (TA = +25°C unless otherwise noted)
      VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to +7 V
      Analog Input Voltage to GND
      AD7895-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      ±17 V
      AD7895-2, AD7895-3 . . . . . . . . . . . . . . . . . . . –5 V, +10 V
      Reference Input Voltage to GND . . . . –0.3 V to VDD + 0.3 V
      Digital Input Voltage to GND . . . . . . . –0.3 V to VDD + 0.3 V
      Digital Output Voltage to GND . . . . . –0.3 V to VDD + 0.3 V
      Operating Temperature Range
      Commercial (A, B Versions) . . . . . . . . . . . –40
      °C to +85°C
      Storage Temperature Range . . . . . . . . . . . –65
      °C to +150°C
      Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . +150
      °C
      Plastic DIP Package, Power Dissipation . . . . . . . . . . 450 mW
      θ
      JA Thermal Impedance
      . . . . . . . . . . . . . . . . . . . . 130
      °C/W
      Lead Temperature (Soldering, 10 sec) . . . . . . . . . . +260
      °C
      SOIC Package, Power Dissipation . . . . . . . . . . . . . . . 450 mW
      θ
      JA Thermal Impedance
      . . . . . . . . . . . . . . . . . . . . 170
      °C/W
      Lead Temperature, Soldering
      Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . +215
      °C
      Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +220
      °C
      WARNING!
      ESD SENSITIVE DEVICE
      CAUTION
      ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
      accumulate on the human body and test equipment and can discharge without detection.
      Although the AD7895 features proprietary ESD protection circuitry, permanent damage may
      occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
      precautions are recommended to avoid performance degradation or loss of functionality.
      (VDD = +5 V, GND = 0 V, REF IN = +2.5 V)
      *Stresses above those listed under “Absolute Maximum Ratings” may cause
      permanent damage to the device. This is a stress rating only and functional
      operation of the device at these or any other conditions above those listed in the
      operational sections of this specification is not implied. Exposure to absolute
      maximum rating conditions for extended periods may affect device reliability.
      ORDERING GUIDE
      Model
      Temperature Range
      Linearity Error (LSB)
      SNR (dB)
      Package Option*
      AD7895AN-2
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      N-8
      AD7895AR-2
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      SO-8
      AD7895BR-2
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      SO-8
      AD7895AN-10
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      N-8
      AD7895AR-10
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      SO-8
      AD7895BR-10
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      SO-8
      AD7895AN-3
      –40
      °C to +125°C
      ±1 LSB
      70 dB
      N-8
      AD7895AR-3
      –40
      °C to +85°C
      ±1 LSB
      70 dB
      SO-8
      *N = Plastic DIP, SO = SOIC.
      +1.6V
      2.0mA
      50pF
      TO
      OUTPUT
      PIN
      Figure 1. Load Circuit for Access Time and Bus
      Relinquish Time
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