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




Application

·Pen-based computers
·Digitizers
·Global positioning systems




Pinout

Specifications

Resolution	12 bits
Input Channels	8
Interface Type	SPI / QSPI / Microwire
Differential Input	Yes
INL (LSB)	+/-2.0
Max KSample Rate	114 ksps
Min Supply Voltage	4.5 Volt
Max Supply Voltage	5.5 Volt
Reference Source	External
Temperature Min	-40 deg C
Temperature Max	85 deg C
Power Down	Yes
Input Sample/Hold	Yes
Special Features	Undefined
Data Converter Type	ADC
Max Sample Rate	0.114 MSPS
View Using Catalog

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





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 multiplexer, 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 internally connected. The ADC12130 family is tested and specified with a 5MHz 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-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 NSC MICROWIRE ™. For voltage references, see the LM4040, LM4050 or LM4041.

Reliability Metrics

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Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
ADC12138CIMSA	CS150	1	13275	76	0	932500	4	264599421
ADC12138CIWM	CS150	1	13275	76	0	932500	4	264599421

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.




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.