SAA7709H/N103/S420 NXP Semiconductors, SAA7709H/N103/S420 Datasheet - Page 8

• Manufacturer Part Number: SAA7709H/N103/S420
• Description: Audio DSPs Car radio Digital Signal Processor
• Manufacturer: NXP Semiconductors

Specifications of SAA7709H/N103/S420

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935269693557

NXP Semiconductors
ADC0808S125_ADC0808S250_3
Product data sheet
7.5 Full-scale input selection
The ADC0808S has an internal reference circuit which can be overruled by an external
reference voltage. This can be done with the full-scale reference voltage (V
according to
The ADC provides the required common-mode voltage on pin CMADC. In case of internal
regulation, the regulator output voltage on pin CMADC is 0.95 V.
Table 9.
The internal reference circuit is enabled by connecting pin FSIN to ground. The
common-mode output voltage V
maximum peak-to-peak input voltage V
The ADC full-scale input selection principle is shown in
Full-scale reference voltage
V
1.15 V
1.20 V
1.25 V
1.30 V
1.35 V
Fig 6.
ref(fs)
Complete conversion signal timing diagram using CCS
Full-scale input selection
CCS (f
Table
CCS (f
D0 to D7
clk
/ 2)
clk
9.
)
Rev. 03 — 24 February 2009
Common-mode output
voltage V
0.8 V
0.86 V
0.94 V
1.01 V
1.09 V
O(cm)
n
data
2
on pin CMADC will then be 0.95 V, and the
O(cm)
i(p-p)(max)
t
d(CCS)
Single 8-bit ADC, up to 125 MHz or 250 MHz
n
data
1
will be 2.0 V; see
ADC0808S125/250
Figure
data
n
Maximum peak-to-peak input
voltage V
1.825 V
1.91 V
1.99 V
2.08 V
2.16 V
9.
Figure 7
n
data
001aab893
i(p-p)(max)
1
© NXP B.V. 2009. All rights reserved.
50 %
50 %
and
ref(fs)
Figure
)
8 of 23
8.