EVAL-ADUC7128QSPZ Analog Devices Inc, EVAL-ADUC7128QSPZ Datasheet - Page 38

• Manufacturer Part Number: EVAL-ADUC7128QSPZ
• Description: KIT DEV FOR ADUC7128
• Manufacturer: Analog Devices Inc
• Series: QuickStart™ PLUS Kitr
• Type: MCUr

Specifications of EVAL-ADUC7128QSPZ

• Contents: Evaluation Board, Power Supply, Cable, Software, Emulator and Documentation
• Silicon Manufacturer: Analog Devices
• Core Architecture: ARM
• Core Sub-architecture: ARM7TDMI
• Silicon Core Number: ADuC7128
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: ADuC7128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

ADuC7128/ADuC7129
BAND GAP REFERENCE
The ADuC7128/ADuC7129 provide an on-chip band gap
reference of 2.5 V that can be used for the ADC and for the
DAC. This internal reference also appears on the V
When using the internal reference, a capacitor of 0.47 μF must
be connected from the external V
stability and fast response during ADC conversions. This
reference can also be connected to an external pin (V
and used as a reference for other circuits in the system.
Table 40. REFCON MMR Bit Designations
Bit
7:1
0
Description
Reserved.
Internal Reference Output Enable.
Note: The on-chip DAC is functional only with the internal reference output enable bit set. It does not work with an external
reference.
Set by user to connect the internal 2.5 V reference to the V
to be buffered.
Cleared by user to disconnect the reference from the V
REF
pin to AGND to ensure
REF
REF
pin.
)
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REF
pin.
REF
pin. The reference can be used for external components but needs
An external buffer is required because of the low drive capability
of the V
reference input on the V
disable the internal reference. Therefore, the external reference
source must be capable of overdriving the internal reference source.
The band gap reference interface consists of an 8-bit REFCON
MMR, described in Table 40.
REF
output. A programmable option also allows an external
REF
pin. Note that it is not possible to