MIL-M-38510-140 Microcircuits, Linear, Monolithic And Hybrid Silicon, Microprocessor Compatible, 12 Bit Analog-To-Digital ConvertersThis specification covers the detail requirements for monolithic and hybrid, microprocessor compatible, 12-bit successive approximation analog-to-digital converters buffered outputs. Two product assurance classes and a choice of case outlines and lead finishes are provided and are reflected in the complete part number. For this product, the requirements of MIL-M-38510 have been superseded by MIL-PRF-38535, see 6.3.

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MIL-M-38510/140A

Symbol	Description
R / C	Read and convert, not
Ri	Input resistance of the analog input
STS	Status
TA	Ambient temperature
tc	Conversion time
tdd	Data access time from CE high
tDDR	Data access time from R/C high
tDS	Status delay high from R/C low
tDSC	Status delay high from CE high
tHD	Data valid delay from CE low
tHDR	Three state output delay from R/C low
tHL	Three state output delay from CE low
tHS	Status delay low from data valid
VFSR	Full scale voltage range
VIN(a)	Analog input voltage
VO	Digital output voltage
VOH	Digital high level output voltage
VOL	Digital low level output voltage
VREF	Reference output voltage
12/8	12 or 8 bit parallel output enable control

Bipolar mode. Bipolar mode is the D/A converter operation mode that provides both positive and negative output voltages in response to an offset binary input code.

Integral linearity error. Integral linearity error is the difference between the average of two input analog voltages, required to establish adjacent output code-word transitions, with respect to the ideal voltage at the same bit mid point as defined by a straight line that passes through points extrapolated one half LSB from the first and the last bit transitions.

Differential linearity. Differential linearity is the difference between two input analog voltages required to establish adjacent output code word transitions. The ideal differential linearity is 1 LSB.

Differential linearity error. Differential linearity error is the difference between the actual and the ideal differential linearity values for any two adjacent code word transitions.

Full scale range. Full scale range is the voltage difference between the input voltages at the first bit transition and the last bit transition plus twice the voltage difference between two adjacent bit transitions.

Least significant bit. The least significant bit is the bit in the output code that carries the least weight. The value of the least significant bit is the average difference between the analog input voltages at two adjacent output bit transitions. The ideal difference voltage is the value of the full scale range divided by 1024.

Monotonicity. A device is monotonic if the ratio of the incremental change in output to incremental change in input does not change polarity over the full scale range.

Most significant bit. The most significant bit is the bit in the output code that carries the most weight. It is the output bit that changes state when the analog input voltage change from its most positive value to one-half of the full scale range.