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Details, datasheet, quote on part number:ADC08031BIWMX
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| Part: | ADC08031BIWMX |
| Category: | Data Conversion => ADC (Analog to Digital Converters) |
| Description: | ADC08031 - 8-Bit High Speed Serial I/o A/D Converter With Multiplexer Options, Voltage Ref. And Track/hold Function, Package: Soic Wide, Pin Nb=14 |
| Company: | National Semiconductor Corporation |
| Datasheet: | Download ADC08031BIWMX datasheet File size : 565 kB |
| Request For quote: | Find where to buy ADC08031BIWMX
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Datasheet text preview:
ADC08031/ADC08032/ADC08034/ADC08038 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function
June 2000
ADC08031/ADC08032/ADC08034/ADC08038 8-Bit High-Speed Serial I/O A/D Converters with Multiplexer Options, Voltage Reference, and Track/Hold Function
General Description
The ADC08031/ADC08032/ADC08034/ADC08038 are 8-bit successive approximation A/D converters with serial I/O and configurable input multiplexers with up to 8 channels. The serial I/O is configured to comply with the NSC MICROWIRETM serial data exchange standard for easy interface to the COPSTM family of controllers, and can easily interface with standard shift registers or microprocessors. The ADC08034 and ADC08038 provide a 2.6V band-gap derived reference. For devices offering guaranteed voltage reference performance over temperature see ADC08131, ADC08134 and ADC08138. A track/hold function allows the analog voltage at the positive input to vary during the actual A/D conversion. The analog inputs can be configured to operate in various combinations of single-ended, differential, or pseudo-differential modes. In addition, input voltage spans as small as 1V can be accommodated. n Test systems n Embedded diagnostics
Features
n Serial digital data link requires few I/O pins n Analog input track/hold function n 2-, 4-, or 8-channel input multiplexer options with address logic n 0V to 5V analog input range with single 5V power supply n No zero or full scale adjustment required n TTL/CMOS input/output compatible n On chip 2.6V band-gap reference n 0.3" standard width 8-, 14-, or 20-pin DIP package n 14-, 20-pin small-outline packages
Key Specifications
n n n n n n Resolution: 8 bits Conversion time (fC = 1 MHz): 8µs (max) Power dissipation: 20mW (max) Single supply: 5VDC ( ± 5%) Total unadjusted error: ± 1/2 LSB and ± 1LSB No missing codes over temperature
Applications
n n n n Digitizing automotive sensors Process control monitoring Remote sensing in noisy environments Instrumentation
Ordering Information
Industrial (-40°C TA +85°C) ADC08031CIN* ADC08038CIN* ADC08031CIWM, ADC08032CIWM, ADC08034CIWM ADC08038CIWM
*Not recomended for new designs.
Package N08E N20A M14B M20B
COPSTM microcontrollers and MICROWIRETM are trademarks of National Semiconductor Corporation.
© 2000 National Semiconductor Corporation
DS010555
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ADC08031/ADC08032/ADC08034/ADC08038
Connection Diagrams
ADC08038 ADC08034
DS010555-3
DS010555-2
ADC08031 Dual-In-Line Package
ADC08032 Small Outline Package
DS010555-5
DS010555-30
ADC08031 Small Outline Package
DS010555-31
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ADC08031/ADC08032/ADC08034/ADC08038
Absolute Maximum Ratings (Notes 1, 3)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) Voltage at Inputs and Outputs Input Current at Any Pin (Note 4) Package Input Current (Note 4) Power Dissipation at TA = 25°C (Note 5) ESD Susceptibility (Note 6) Soldering Information N Package (10 sec.) SO Package: Vapor Phase (60 sec.) Infrared (15 sec.) (Note 7) 6.5V -0.3V to VCC + 0.3V ± 5 mA ± 20 mA 800 mW 1500V 235°C 215°C 220°C
Storage Temperature
-65°C to +150°C
Operating Ratings (Notes 2, 3)
Temperature Range ADC08031BIN, ADC08031CIN, ADC08032BIN, ADC08032CIN, ADC08034BIN, ADC08034CIN, ADC08038BIN, ADC08038CIN, ADC08031BIWM, ADC08032BIWM, ADC08034BIWM, ADC08038BIWM ADC08031CIWM, ADC08032CIWM, ADC08034CIWM, ADC08038CIWM Supply Voltage (VCC) TMIN TA TMAX -40°C TA +85°C
4.5 VDC to 6.3 VDC
Electrical Characteristics
The following specifications apply for VCC = VREF = +5 VDC, and fCLK = 1 MHz unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol Parameter Conditions Typical (Note 8) CONVERTER AND MULTIPLEXER CHARACTERISTICS Total Unadjusted Error BIN, BIWM CIN, CIWM Differential Linearity RREF Reference Input Resistance (Note 11) 3.5 1.3 6.0 VIN Analog Input Voltage DC Common-Mode Error Power Supply Sensitivity On Channel Leakage Current (Note 13) VCC = 5V ± 5%, VREF = 4.75V On Channel = 5V, Off Channel = 0V On Channel = 0V, Off Channel = 5V Off Channel Leakage Current (Note 13) On Channel = 5V, Off Channel = 0V On Channel = 0V, Off Channel = 5V DIGITAL AND DC CHARACTERISTICS VIN(1) VIN(0) IIN(1) IIN(0) VOUT(1) Logical "1" Input Voltage Logical "0" Input Voltage Logical "1" Input Current Logical "0" Input Current Logical "1" Output Voltage VCC = 5.25V VCC = 4.75V VIN = 5.0V VIN = 0V VCC = 4.75V: IOUT = -360 µA IOUT = -10 µA VOUT(0) Logical "0" Output Voltage VCC = 4.75V IOUT = 1.6 mA 2.4 4.5 0.4 V (min) V (min) V (max) 2.0 0.8 1 -1 V (min) V (max) µA (max) µA (max) 0.2 1 -0.2 -1 -0.2 -1 0.2 1 µA (max) µA (max) µA (max) µA (max) (Note 12) (VCC + 0.05) (GND - 0.05) k k (min) k (max) V (max) V (min) LSB (max) LSB (max) (Note 10) Limits (Note 9) Units (Limits)
± 1/2 ±1
8
LSB (max) LSB (max) Bits (min)
± 1/4 ± 1/4
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ADC08031/ADC08032/ADC08034/ADC08038
Electrical Characteristics
Symbol Parameter
(Continued)
The following specifications apply for VCC = VREF = +5 VDC, and fCLK = 1 MHz unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Conditions Typical (Note 8) DIGITAL AND DC CHARACTERISTICS IOUT ISOURCE ISINK ICC TRI-STATE ® Output Current Output Source Current Output Sink Current Supply Current ADC08031, ADC08034, and ADC08038 ADC08032 (Note 16) REFERENCE CHARACTERISTICS VREFOUT Nominal Reference Output VREFOUT Option Available Only on ADC08034 and ADC08038 2.6 V 7.0 mA (max) CS = HIGH 3.0 mA (max) VOUT = 0V VOUT = 5V VOUT = 0V VOUT = VCC -3.0 3.0 -6.5 8.0 µA (max) µA (max) mA (min) mA (min) Limits (Note 9) Units (Limits)
Electrical Characteristics
The following specifications apply for VCC = VREF = +5 VDC, and tr = tf = 20 ns unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C. Symbol fCLK Parameter Clock Frequency Clock Duty Cycle (Note 14) TC tCA tSELECT tSET-UP tHOLD tpd1, tpd0 Conversion Time (Not Including MUX Addressing Time) Acquisition Time CLK High while CS is High CS Falling Edge or Data Input Valid to CLK Rising Edge Data Input Valid after CLK Rising Edge CLK Falling Edge to Output Data Valid (Note 15) t1H, t0H TRI-STATE Delay from Rising Edge of CS to Data Output and SARS Hi-Z CIN COUT Capacitance of Logic Inputs Capacitance of Logic Outputs CL = 100 pF: Data MSB First Data LSB First CL = 10 pF, RL = 10 k (see TRI-STATE Test Circuits) CL = 100 pF, RL = 2 k 5 5 180 ns (max) pF pF 50 250 200 ns (max) ns (max) ns 20 ns (min) 50 25 fCLK = 1 MHz Conditions Typical (Note 8) 10 1 40 60 8 8
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Limits (Note 9)
Units (Limits) kHz (min) MHz (max) % (min) % (max) 1/fCLK (max) µs (max) 1/fCLK(max) ns ns (min)
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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Note 2: Operating Ratings indicate conditions for which the device is functional. These ratings do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Note 3: All voltages are measured with respect to AGND = DGND = 0 VDC, unless otherwise specified. Note 4: When the input voltage VIN at any pin exceeds the power supplies (VIN VCC) the current at that pin should be limited to 5 mA. The 20 mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5 mA to four pins. Note 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, JA and the ambient temperature, TA. The maximum allowable power dissipation at any temperature is PD = (TJMAX - TA)/JA or the number given in the Absolute Maximum Ratings, whichever is lower. For these de-
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ADC08031/ADC08032/ADC08034/ADC08038
Electrical Characteristics
(Continued)
vices, TJMAX = 125°C. The typical thermal resistances (JA) of these parts when board mounted follow: ADC08031 and ADC08032 with BIN and CIN suffixes 120°C/W, ADC08038 with CIN suffix 80°C/W. ADC08031 with CIWM suffix 140°C/W, ADC08032 140°C/W, ADC08034 140°C/W, ADC08038 with CIWM suffix 91°C/W. Note 6: Human body model, 100 pF capacitor discharged through a 1.5 k resistor. Note 7: See AN450 "Surface Mounting Methods and Their Effect on Product Reliability" or Linear Data Book section "Surface Mount" for other methods of soldering surface mount devices. Note 8: Typicals are at TJ = 25°C and represent the most likely parametric norm. Note 9: Guaranteed to National's AOQL (Average Outgoing Quality Level). Note 10: Total unadjusted error includes offset, full-scale, linearity, multiplexer. Note 11: Cannot be tested for the ADC08032. Note 12: For VIN(-) VIN(+) the digital code will be 0000 0000. Two on-chip diodes are tied to each analog input (see Block Diagram) which will forward-conduct for analog input voltages one diode drop below ground or one diode drop greater than VCC supply. During testing at low VCC levels (e.g., 4.5V), high level analog inputs (e.g., 5V) can cause an input diode to conduct, especially at elevated temperatures, which will cause errors for analog inputs near full-scale. The spec allows 50 mV forward bias of either diode; this means that as long as the analog VIN does not exceed the supply voltage by more than 50 mV, the output code will be correct. Exceeding this range on an unselected channel will corrupt the reading of a selected channel. Achievement of an absolute 0 VDC to 5 VDC input voltage range will therefore require a minimum supply voltage of 4.950 VDC over temperature variations, initial tolerance and loading. Note 13: Channel leakage current is measured after a single-ended channel is selected and the clock is turned off. For off channel leakage current the following two cases are considered: one, with the selected channel tied high (5 VDC) and the remaining seven off channels tied low (0 VDC), total current flow through the off channels is measured; two, with the selected channel tied low and the off channels tied high, total current flow through the off channels is again measured. The two cases considered for determining on channel leakage current are the same except total current flow through the selected channel is measured. Note 14: A 40% to 60% duty cycle range insures proper operation at all clock frequencies. In the case that an available clock has a duty cycle outside of these limits the minimum time the clock is high or low must be at least 450 ns. The maximum time the clock can be high or low is 100 µs. Note 15: Since data, MSB first, is the output of the comparator used in the successive approximation loop, an additional delay is built in (see Block Diagram) to allow for comparator response time. Note 16: For the ADC08032 VREFIN is internally tied to VCC, therefore, for the ADC08032 reference current is included in the supply current.
Typical Performance Characteristics
Linearity Error vs Reference Voltage Linearity Error vs Temperature Linearity Error vs Clock Frequency
DS010555-32
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Power Supply Current vs Temperature (ADC08038, ADC08034, ADC08031)
Output Current vs Temperature
Power Supply Current vs Clock Frequency
DS010555-36 DS010555-35
DS010555-37
Note: For ADC08032 add IREF
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