ADuC7060
ADC CIRCUIT INFORMATION
AVDD
VREF+ VREF–
DAC0
BUF
IEXC0
IEXC1
ADC0
INTERNAL
REFERENCE
50μA O/C
DETECT
AVDD
AUX_REFP
AUX_REFM
DAC
OVERRANGE
CONVERSION
COUNTER
ADC1
PGA
Σ - Δ
MODULATOR
0.5Hz TO 8kHz
PROGRAMMABLE
FILTER
CHOP
MUX
0.2mA TO 1mA
BUF
Σ - Δ
MODULATOR
0.2Hz TO 8kHz
PROGRAMMABLE
FILTER
INTERFACE
AND CONTROL
TO ARM
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC8
INTEGRATOR
ACCUMULATOR
COMPARATORS
ADC9
GND_SW
50 ?
AGND
CHOP
MUX
TEMPERATURE
SENSOR
Figure 13. Analog Block Diagram
The ADuC7060 incorporates two independent multichannel
Σ-Δ ADCs. The primary ADC is a 24-bit, 5-channel ADC. The
auxiliary ADC is a 24-bit Σ-Δ ADC, with up to eight input
channels.
The primary ADC input has a mux and a programmable gain
amplifier on its input stage. The mux on the primary channel
can be configured as two fully differential input channels or as
four single-ended input channels.
The auxiliary ADC incorporates a buffer on its input stage.
measurement of a wide dynamic range and low frequency
signals such as those in pressure sensor, temperature sensor,
weigh scale, or strain gage type applications.
The ADuC7060 auxiliary ADC can be configured as four fully
differential input channels or as eight single-ended input
channels.
Because of internal buffering, the internal channels can convert
signals directly from sensors without the need for external
signal conditioning.
Digital filtering is present on both ADCs, which allows
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