ADC081C021CIMK/NOPB National Semiconductor, ADC081C021CIMK/NOPB Datasheet
ADC081C021CIMK/NOPB
Specifications of ADC081C021CIMK/NOPB
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ADC081C021CIMK/NOPB Summary of contents
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... For 10-bit ADCs see the ADC101C021 and ADC101C027. For 12-bit ADCs see the ADC121C021 and ADC121C027. Connection Diagrams 30052101 I2C ® registered trademark of Phillips Corporation. © 2009 National Semiconductor Corporation ADC081C021/ADC081C027 Features ■ C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes ■ ...
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Ordering Information Order Code ADC081C021CIMK ADC081C021CIMKX ADC081C027CIMK ADC081C027CIMKX ADC081C021CIMM ADC081C021CIMMX Shipped with the ADC081C021 (TSOT-6). Also compatible with ADC081C021EB Block Diagram www.national.com Option Alert pin Alert pin TSOT-6 Tape-and-Reel Address pin Address pin TSOT-6 Tape-and-Reel Alert and Address pins Alert ...
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Pin Descriptions Symbol Type V Supply A GND Ground V Analog Input IN ALERT Digital Output SCL Digital Input Digital SDA Input/Output ADDR0 Digital Input, three levels ADDR1 Package Pinouts V A ADC081C021 1 TSOT-6 ADC081C027 1 TSOT-6 ADC081C021 5 ...
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... Absolute Maximum Ratings (Notes Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Voltage on any Analog Input Pin to GND Voltage on any Digital Input Pin to GND Input Current at Any Pin (Note 3) Package Input Current (Note 3) Power Dissipation 25° ...
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Symbol Parameter FPBW Full Power Bandwidth (−3dB) ANALOG INPUT CHARACTERISTICS V Input Range Leakage Current (Note 10) DCL C Input Capacitance INA SERIAL INTERFACE INPUT CHARACTERISTICS (SCL, SDA) V Input High Voltage IH V Input Low Voltage ...
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Symbol Parameter POWER REQUIREMENTS Supply Voltage Minimum V A Supply Voltage Maximum Continuous Operation Mode -- 2-wire interface active. I Supply Current N P Power Consumption N Automatic Conversion Mode -- 2-wire interface stopped and quiet (SCL = SDA = ...
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A.C. and Timing Characteristics The following specifications apply for 25°C, unless otherwise specified. A Symbol Parameter CONVERSION RATE Conversion Time f Conversion Rate CONV DIGITAL TIMING SPECS (SCL, SDA) f Serial Clock Frequency SCL t SCL Low ...
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Symbol Parameter t Rise time of SDA signal rDA t Fall time of SDA signal fDA t Rise time of SCL signal rCL Rise time of SCL signal after a t repeated start condition and after an rCL1 acknowledge bit. ...
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Note 7: The inputs are protected as shown below. Input voltage magnitudes up to 5.5V, regardless of V example 3V, the digital input pins can be driven with a 5V logic device. A Note 8: To guarantee ...
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Specification Definitions ACQUISITION TIME is the time required for the ADC to ac- quire the input voltage. During this time, the hold capacitor is charged by the input voltage. APERTURE DELAY is the time between the start of a con- ...
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Typical Performance Characteristics C, unless otherwise stated. INL vs. Code - V A INL vs. Code - V A INL vs. Supply f = 400kHz, f SCL =3V 30052122 =5V 30052124 30052126 11 = 22ksps 1kHz ...
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ENOB vs. Supply FFT Plot - V Offset Error vs. Temperature www.national.com 30052128 =3V A 30052130 30052132 12 SINAD vs. Supply 30052129 FFT Plot - V =3V A 30052131 Gain Error vs. Temperature 30052133 ...
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Continuous Operation Supply Current vs. V Power Down (PD ) Supply Current vs Automatic Conversion Supply Current vs 30052134 A 30052136 13 A 30052135 www.national.com ...
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Functional Description The ADC081C021 and the ADC081C027 are successive-ap- proximation analog-to-digital converters designed around a charge-redistribution digital-to-analog converter. Unless oth- erwise stated, references to the ADC081C021 in this section will apply to both the ADC081C021 and the ADC081C027. 1.1 ...
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REFERENCE VOLTAGE The ADC081C021 uses the supply ( the reference must be treated as a reference. The analog-to-digital con- A version will only be as precise as the reference (V supply voltage should be ...
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Conversion Result Register This register holds the result of the most recent conversion. In the normal mode, a new conversion is started whenever this register is read. The conversion result data is in straight binary format with the MSB ...
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Configuration Register Pointer Address 02h (Read/Write) Default Value: 00h Cycle Time [2:0] Alert Alert Alert Hold Flag Pin Enable Enable Cycle Time[2:0] Conversion Interval Mode Disabled Bits ...
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V -- Alert Limit Register - Over Range HIGH This register holds the upper limit threshold used to determine the alert condition. If the conversion moves higher than this limit alert is generated. HIGH Pointer Address 04h ...
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Bits Name Description 15:12 Reserved Always reads zeros. Zeros must be written to these bits. 11:4 Lowest Conversion Lowest conversion result data. D11 is MSB. 3:0 Reserved Always reads zeros. Zeros must be written to these bits. 1.6 ...
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Standard-Fast Mode In Standard-Fast mode, the master generates a start condi- tion by driving SDA from high to low while SCL is high. The start condition is always followed by a 7-bit slave address and a Read/Write bit. After ...
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FIGURE 8. Beginning Hs-Mode Communication 1.7 Slave (Hardware) Address The ADC has a seven-bit hardware address which is also referred slave address. For the MSOP-8 version of the AD- C081C021, this address is configured ...
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The Under Range Alert condition is cleared when one of the following two conditions is met: 1. The controller writes a one to the Under Range Alert Flag bit. 2. The measured voltage goes above the programmed V limit plus ...
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COMMUNICATING WITH THE ADC081C021 The ADC081C021's data registers are selected by the ad- dress pointer (see Section 1.6.1 Address Pointer Register). To read/write a specific data register, the pointer must be set to that register's address. The pointer is ...
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Reading from a 1-Byte ADC Register The following diagrams indicate the sequence of actions re- quired for a single Byte read from an ADC081C021 Register. FIGURE 13. (a) Typical Read from a 1-Byte ADC Register with Preset Pointer FIGURE ...
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FIGURE 16. (b) Typical Write to a 2-Byte ADC Register 1.11 QUIET INTERFACE MODE To improve performance at High Speed, operate the ADC in Quiet Interface Mode. This mode provides improved INL and DNL performance Hs-Mode ...
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... BUFFERED INPUT A buffered input application circuit is shown in Figure 19. The analog input is buffered by a National Semiconductor LMP7731. The non-inverting amplifier configuration provides a buffered gain stage for a single ended source. This appli- cation circuit is good for single-ended sensor interface ...
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INTELLIGENT BATTERY MONITOR The ADC081C021 is easily used as an intelligent battery monitor. The simple circuit shown in Figure 20, uses the ADC081C021, the LP2980 fixed reference, and a resistor di- vider to implement an intelligent battery monitor with ...
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Physical Dimensions Order Numbers ADC081C021CIMK & ADC081C027CIMK www.national.com inches (millimeters) unless otherwise noted 6-Lead TSOT NS Package Number MK06A 8-Lead MSOP Order Numbers ADC081C021CIMM NS Package Number MUA08A 28 ...
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Notes 29 www.national.com ...
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