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ADC12138
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MFG:NS Package Cooled:SMD

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Part Number: ADC12138

MFG: NS

Package Cooled: SMD

Description: The ADC12130, ADC12132 and ADC12138 are 12-bit plus sign successive approximation A/D converters with serial I/O and co...

ADC12138 General Description

The ADC12130, ADC12132 and ADC12138 are 12-bit plus sign successive approximation A/D converters with serial I/O and configurable input multiplexer. The ADC12132 and ADC12138 have a 2 and an 8 channel multiplexer, respectively.

The differential multiplexer outputs and A/D 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 A/D inputs internally connected. The ADC12130 family is tested with a 5 MHz clock. On request, these A/Ds 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-differential 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 because of the 12-bit plus sign output data format.
The serial I/O is configured to comply with the NSC MICROWIRE ™. For voltage references, see the LM4040 or LM4041.

ADC12138 Maximum Ratings

Positive Supply Voltage
(V⁺ = VA⁺= VD⁺)                                                   6.5V
Voltage at Inputs and Outputs
except CH0CH7 and COM                -0.3V to V⁺ +0.3V
Voltage at Analog Inputs
CH0CH7 and COM GND                         -5V to V⁺ +5V
|V_A+ - V_D+| 300 mV
Input Current at Any Pin (Note 3)                     ±30 mA
Package Input Current (Note 3)                    ±120 mA
Package Dissipation at
T_A = 25 (Note 4)                                             500 mW
ESD Susceptability (Note 5)
Human Body Model                                              1500V
Soldering Information
N Packages (10 seconds)                                    260
SO Package (Note 6):
Vapor Phase (60 seconds)                                     215
Infrared (15 seconds)                                            220
Storage Temperature                           -65 to +150

ADC12138 Features

·Serial I/O (MICROWIRE, SPI and QSPI Compatible)
·2 or 8 channel differential or single-ended multiplexer
·Analog input sample/hold function
·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

ADC12138 Typical Application

·Pen-based computers
·Digitizers
·Global positioning systems

ADC12138 Connection Diagram

ADC12138 datasheet

ADC12138
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Datasheet: ADC12138
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