2 definitions – Texas Instruments TMS320F2802 User Manual
Page 127

ac
R
s
ADCIN0
C
p
10 pF
R
on
1 k
Ω
1.64 pF
C
h
Switch
Typical Values of the Input Circuit Components:
Switch Resistance (R
on
):
1 k
Ω
Sampling Capacitor (C
h
):
1.64 pF
Parasitic Capacitance (C
p
): 10 pF
Source Resistance (R
s
):
50
Ω
28x DSP
Source
Signal
SPRS230N – OCTOBER 2003 – REVISED MAY 2012
Figure 6-25. ADC Analog Input Impedance Model
6.10.7.2 Definitions
Reference Voltage
The on-chip ADC has a built-in reference, which provides the reference voltages for the ADC.
Analog Inputs
The on-chip ADC consists of 16 analog inputs, which are sampled either one at a time or two channels at
a time. These inputs are software-selectable.
Converter
The on-chip ADC uses a 12-bit four-stage pipeline architecture, which achieves a high sample rate with
low power consumption.
Conversion Modes
The conversion can be performed in two different conversion modes:
•
Sequential sampling mode (SMODE = 0)
•
Simultaneous sampling mode (SMODE = 1)
Copyright © 2003–2012, Texas Instruments Incorporated
Electrical Specifications
127
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