ADC12132CIMSA National Semiconductor, ADC12132CIMSA Datasheet

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ADC12132CIMSA

Manufacturer Part Number
ADC12132CIMSA
Description
IC ADC 12BIT 20-SSOP
Manufacturer
National Semiconductor
Datasheet

Specifications of ADC12132CIMSA

Number Of Bits
12
Sampling Rate (per Second)
114k
Data Interface
NSC MICROWIRE™, Serial
Number Of Converters
4
Power Dissipation (max)
33mW
Voltage Supply Source
Analog and Digital
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-SSOP (0.200", 5.30mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*ADC12132CIMSA

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© 2008 National Semiconductor Corporation
ADC12130/ADC12132/ADC12138
Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters
with MUX and Sample/Hold
General Description
NOTE: Some device/package combinations are obsolete
and are described and shown here for reference only. See
our web site for product availability.
The ADC12130, ADC12132 and ADC12138 are 12-bit plus
sign successive approximation Analog-to-Digital converters
with serial I/O and configurable input multiplexer. The
ADC12132 and ADC12138 have a 2 and an 8 channel mul-
tiplexer, respectively. The differential multiplexer outputs and
ADC inputs are available on the MUXOUT1, MUXOUT2,
A/DIN1 and A/DIN2 pins. The ADC12130 has a two channel
multiplexer with the multiplexer outputs and ADC inputs in-
ternally connected. The ADC12130 family is tested and spec-
ified with a 5 MHz clock. On request, these ADCs go through
a self calibration process that adjusts linearity, zero and full-
scale errors to typically less than ±1 LSB each.
The analog inputs can be configured to operate in various
combinations of single-ended, differential, or pseudo-differ-
ential modes. A fully differential unipolar analog input range
(0V to +5V) can be accommodated with a single +5V supply.
In the differential modes, valid outputs are obtained even
when the negative inputs are greater than the positive be-
cause of the 12-bit plus sign output data format.
The serial I/O is configured to comply with NSC MI-
CROWIRE ™ . For voltage references, see the LM4040,
LM4050 or LM4041.
TRI-STATE
®
is a registered trademark of National Semiconductor Corporation.
12079
Features
Key Specifications
Applications
Resolution
Serial I/O (MICROWIRE, SPI and QSPI Compatible)
Power down mode
Programmable acquisition time
Variable digital output word length and format
No zero or full scale adjustment required
0V to 5V analog input range with single 5V power supply
Pen-based computers
Digitizers
Global positioning systems
12-Bit plus sign conversion time
12-Bit plus sign throughput time
Integral Linearity Error
Single Supply
Power Consumption
+3.3V
+3.3V power down
+5V
+5V power down
September 8, 2008
3.3V or 5V ±10%
12-bit plus sign
±2 LSB (max)
15 mW (max)
33 mW (max)
100 μW (typ)
8.8 µs (max)
www.national.com
14 µs (max)
40 μW (typ)

Related parts for ADC12132CIMSA

ADC12132CIMSA Summary of contents

Page 1

... The serial I/O is configured to comply with NSC MI- CROWIRE ™ . For voltage references, see the LM4040, LM4050 or LM4041. TRI-STATE ® registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation Features ■ Serial I/O (MICROWIRE, SPI and QSPI Compatible) ■ ...

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ADC12138 Simplified Block Diagram Connection Diagrams 16-Pin Dual-In-Line and Wide Body SO Packages Top View www.national.com 1207902 2 1207901 20-Pin SSOP Package 1207947 Top View ...

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... Ordering Information Industrial Temperature Range −40°C ADC12130CIN ADC12130CIWM ADC12130CIWMX ADC12132CIMSA ADC12132CIMSAX ADC12138CIN ADC12138CIWM ADC12138CIWMX ADC12138CIMSA ADC12138CIMSA Some of these product/package combinations are obsolete and are shown here for reference only. Check the National web site for availability. Pin Descriptions Pin Name Pin Description Analog Inputs to the MUX (multiplexer) ...

Page 4

Pin Name Pin Description Data Output pin. This pin is an active push/pull output when CS is low. When CS is high, this output is TRI- STATE ® . The conversion result (DB0–DB12) and converter status data are clocked out ...

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... IN 500 mW Package Thermal Resistance 1500V 260°C ADC12130CIN ADC12130CIWM 215°C ADC12132CIMSA 220°C ADC12132CIWM −65°C to +150°C ADC121038CIN ADC121038CIMSA ADC12138CIWM Some of these product/package combinations are obsolete and are shown here for reference only. Check the National web site for availability. ...

Page 6

Symbol Parameter UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS S/(N+D) Signal-to-Noise Plus Distortion Ratio −3 dB Full Power Bandwidth DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS S/(N+D) Signal-to-Noise Plus Distortion Ratio −3 dB Full Power Bandwidth REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS C Reference Input ...

Page 7

DC and Logic Electrical Characteristics The following specifications apply for (V common-mode voltage voltage), V − = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V REF MHz, ...

Page 8

AC Electrical Characteristics The following specifications apply for (V common-mode voltage voltage), V − = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V REF MHz, and acquisition ...

Page 9

AC Electrical Characteristics The following specifications apply for (V common-mode voltage voltage), V − = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V REF MHz, and 10 ...

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Note 8: To guarantee accuracy required that the pin. Note 9: With the test condition for V (V REF REF Note 10: Typical figures are 25°C and represent most likely ...

Page 11

FIGURE 2. Simplified Error Curve vs. Output Code without Auto Calibration or Auto Zero Cycles FIGURE 3. Simplified Error Curve vs. Output Code after Auto Calibration Cycle FIGURE 4. Offset or Zero Error Voltage 1207908 11 1207906 1207907 www.national.com ...

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Typical Performance Characteristics Calibration unless otherwise specified. Linearity Error Change vs. Clock Frequency Linearity Error Change vs. Reference Voltage Full-Scale Error Change vs. Clock Frequency www.national.com The following curves apply for 12-bit + sign mode after Auto Linearity Error Change ...

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Full-Scale Error Change vs. Reference Voltage 1207959 Offset or Zero Error Change vs. Clock Frequency 1207961 Offset or Zero Error Change vs. Reference Voltage 1207963 Full-Scale Error Change vs. Supply Voltage Offset or Zero Error Change vs. Temperature Offset or ...

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Analog Supply Current vs. Temperature Digital Supply Current vs. Temperature Full-Scale Error Change vs. Temperature www.national.com Digital Supply Current vs. Clock Frequency 1207965 Linearity Error Change 1207967 Full-Scale Error Change vs. Supply Voltage 1207969 14 1207966 vs. Temperature 1207968 1207970 ...

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Offset or Zero Error Change vs. Temperature 1207971 Analog Supply Current vs. Temperature 1207973 Offset or Zero Error Change vs. Supply Voltage Digital Supply Current vs. Temperature 15 1207972 1207974 www.national.com ...

Page 16

Typical Dynamic Performance Characteristics The following curves apply for 12-bit + sign mode after Auto Calibration unless otherwise specified. Bipolar Spectral Response with 1 kHz Sine Wave Input Bipolar Spectral Response with 20 kHz Sine Wave Input Bipolar Spectral Response ...

Page 17

Bipolar Spurious Free Dynamic Range 1207981 Unipolar Signal-to-Noise + Distortion Ratio vs. Input Frequency 1207983 Unipolar Spectral Response with 1 kHz Sine Wave Input 1207985 Unipolar Signal-to-Noise Ratio vs. Input Frequency Unipolar Signal-to-Noise + Distortion Ratio vs. Input Signal Level ...

Page 18

Unipolar Spectral Response with 20 kHz Sine Wave Input Unipolar Spectral Response with 40 kHz Sine Wave Input www.national.com Unipolar Spectral Response with 30 kHz Sine Wave Input 1207987 Unipolar Spectral Response with 50 kHz Sine Wave Input 1207989 18 ...

Page 19

Test Circuits DO “TRI-STATE” Timing Diagrams DO Falling and Rising Edge , 1207913 Leakage Current DO “TRI-STATE” Falling and Rising Edge 1207916 DI Data Input Timing 19 DO except “TRI-STATE” 1207914 1207915 1207917 1207918 www.national.com ...

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Note: DO output data is not valid during this cycle. www.national.com DO Data Output Timing Using CS DO Data Output Timing with CS Continuously Low ADC12138 Auto Cal or Auto Zero 20 1207919 1207920 1207921 ...

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ADC12138 Read Data without Starting a Conversion Using CS ADC12138 Read Data without Starting a Conversion with CS Continuously Low 21 1207922 1207923 www.national.com ...

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ADC12138 Conversion Using CS with 16-Bit Digital Output Format ADC12138 Conversion with CS Continuously Low and 16-Bit Digital Output Format www.national.com 22 1207924 1207925 ...

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ADC12138 Software Power Up/Down Using CS with 16-Bit Digital Output Format ADC12138 Software Power Up/Down with CS Continuously Low and 16-Bit Digital Output Format 23 1207926 1207927 www.national.com ...

Page 24

Note: Hardware power up/down may occur at any time high while a conversion is in progress that conversion will be corrupted and erroneous data will be stored in the output shift register. ADC12138 Configuration Modification—Example of a ...

Page 25

FIGURE 6. Protecting the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 Analog Pins Format and Set-Up Tables DO Formats DB0 DB1 DB2 DB3 DB4 DB5 DB6 DB7 DB8 DB9 ...

Page 26

Analog Channel Addressed and Assignment MUX Address with A/DIN1 tied to MUXOUT1 and A/DIN2 tied DI0 DI1 DI2 DI3 − ...

Page 27

ADC12138 DI0 DI1 DI2 DI3 ADC12130 and DI0 DI1 ADC12132 See Table 2 or Table 3 See Table 2 or Table 3 See Table 2 or Table 3 See Table 2 or Table ...

Page 28

Application Information NOTE: Some of the device/package combinations are ob- solete and are shown and described here for reference only. Please see the National web site for availability. 1.0 DIGITAL INTERFACE 1.1 Interface Concepts The example in Figure 7 shows ...

Page 29

DI during I/O sequence number 4 in Figure 8 to set CH1 as the positive input and CH0 as the negative input for the different ADC versions. Part DI Data Number DI0 DI1 ...

Page 30

Reading the Data Without Starting a Conversion The data from a particular conversion may be accessed with- out starting a new conversion by ensuring that the CONV line is taken high during the I/O sequence. See the Read Data ...

Page 31

For pseudo-differential signed operation, the circuit of shows a signal AC coupled to the ADC. This gives a digital output range of −4096 to +4095. With a 2.5V reference, 1 LSB is equal to 610 μV. Although the ADC is ...

Page 32

FIGURE 14. Pseudo-Differential Biasing without the Loss of Digital Output Range www.national.com FIGURE 13. Alternative Pseudo-Differential Biasing 32 1207940 1207941 ...

Page 33

REFERENCE VOLTAGE The difference in the voltages applied to the V V − defines the analog input span (the difference between REF the voltage applied between two multiplexer inputs or the voltage applied to one of the multiplexer inputs ...

Page 34

FIGURE 17. V Operating Range REF 4.0 ANALOG INPUT VOLTAGE RANGE The ADC12130/2/8's fully differential ADC generate a two's complement output that is found by using the equation shown below: for (12-bit) resolution the Output Code = Round off to ...

Page 35

THE CALIBRATION CYCLE A calibration cycle needs to be started after the power sup- plies, reference, and clock have been given enough time to stabilize after initial turn-on. During the calibration cycle, cor- rection values are determined for the ...

Page 36

A sample program, written in Microsoft QuickBasic, is shown on the next page. The program prompts for data mode select instruction to be sent to the ADC. This can be found from the Mode Programming table shown earlier. The data ...

Page 37

DOL=Data Out word length, DI=Data string for the DI input, ' DO=ADC result string 'SET CS# HIGH OUT &H3FC, (&H2 OR INP (&H3FC) OUT &H3FC, (&HFE AND INP(&H3FC) OUT &H3FC, (&HFD AND INP (&H3FC) OUT &H3FC, (&HEF AND INP(&H3FC)) ...

Page 38

Physical Dimensions www.national.com inches (millimeters) unless otherwise noted Order Number ADC12130CIWM NS Package Number M16B Order Number ADC12138CIWM NS Package Number M28B 38 ...

Page 39

... Order Number ADC12132CIMSA NS Package Number MSA20 Order Number ADC12138CIMSA NS Package Number MSA28 39 www.national.com ...

Page 40

Order Number ADC12130CIN NS Package Number N16E Order Number ADC12138CIN NS Package Number N28B 40 ...

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Notes 41 www.national.com ...

Page 42

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock Conditioners www.national.com/timing Data Converters www.national.com/adc Displays www.national.com/displays Ethernet www.national.com/ethernet Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www ...

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