AMERICAN MICROSYSTEMS, June, 1998 Preliminary micron CMOS Do

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AMERICAN MICROSYSTEMS, June, 1998 Preliminary micron CMOS Do

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DTMFgen
AMERICAN MICROSYSTEMS,
June, 1998 Preliminary
micron CMOS Double Poly
DTMFgen
SYMBOL FEATURES
Power down Mode Each sine waves controlled independently Output amplitude programmable resolution bits.
ACLK ATONEenbl BCLK BTONEenbl
DESCRIPTION
Dual tone Multi frequency (DTMF) signaling generator. Each sine waves, which controlled independently, summed together presented output. Sine always amplitude sine even though amplitude output programmable with bits.
Vref2x4 Vref1x9 Vref1x4
DTMFgen
ATRIM(7:0)
DESCRIPTION
MAME ACLK BCLK ATONEenbl BTONEenbl ATRIM(7:0) Vref2x4 Vref1x9 Vref1x4 TYPE Digital Input Digital Input Digital Input Digital Input Digital Input Digital Input Analog Input Analog Input Analog Input Analog Output Power Ground DESCRIPTION Sine clock, times sine freq, ~50% duty Sine clock, times sine freq, ~50% duty Enables Sine Active high Enables Sine Active high programmable amplitude inputs Powers down cell, Active Voltage reference Voltage reference Voltage reference Dual Tone output Positive supply Negative supply
DTMFgen
AMERICAN MICROSYSTEMS,
June, 1998 Preliminary
micron CMOS Double Poly
ELECTRICAL CHARACTERISTICS
PARAMETER Supply Voltage Range Supply Current Temperature Frequency Range Single Sine Wave Output Amplitude Amplitude Error Across Frequency Range Total Harmonic Distortion Resistive Output Load Capacitive Output Load CONDITION 0.180V peak 0.127V -0.25 (-3%) 1.75 0.504V peak 0.356V +0.25 (+3%) UNIT
Programmable Amplitude
Single Sine Wave
kohm

AMERICAN MICROSYSTEMS, June, 1998 Preliminary micron CMOS Do

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