SAM4S16C Atmel Corporation, SAM4S16C Datasheet - Page 1115

• Manufacturer Part Number: SAM4S16C
• Manufacturer: Atmel Corporation

Specifications of SAM4S16C

• Flash (kbytes): 1024 Kbytes
• Pin Count: 100
• # Of Touch Channels: 32
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 79
• Ext Interrupts: 79
• Usb Transceiver: 1
• Quadrature Decoder Channels: 2
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 2
• Uart: 4
• Ssc: 1
• Sd / Emmc: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1000
• Analog Comparators: 1
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• External Bus Interface: 1
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.62 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Table 41-37. Dynamic Performance Characteristics in Differential and 12 bits mode
Note:
41.7.1.1
11100A–ATARM–28-Oct-11
Parameter
Signal to Noise Ratio - SNR
Total Harmonic Distortion - THD
Signal to Noise and Distortion - SINAD
1. ADC Clock (F
[1kHz, 500kHz] – Nyquist conditions fulfilled.
Track and Hold Time versus Source Output Impedance
ADC
The following figure gives a simplified acquisition path.
Figure 41-12. Simplified Acquisition Path
During the tracking phase the ADC needs to track the input signal during the tracking time
shown below:
With t
Two cases must be considered:
Set TRANSFER = 1 and TRACTIM = 0.
In this case, the allowed Zsource can be computed versus the ADC frequency with the hypothe-
sis of t
Where t
)= 20 MHz, Fs =1MHz, Fin = 127kHz, IBCTL = 01, FFT using 1024 points or more, Frequency band =
f
20.00
16.00
10.67
8.00
6.40
5.33
4.57
4.00
• 10-bit mode: t
• 12-bit mode: t
1. The calculated tracking time (t
ADC
= ADC clock (MHz)
TRACK
TRACK
CP_ADC
expressed in ns and Z
= 15 × t
= 1/f
Conditions
TRACK
TRACK
ADC
CP_ADC
.
Zsource
= 0.042 x Zsource + 160
= 0.054 x Zsource + 205
:
Z
Input
ADC
SOURCE
10
14
22
31
40
48
57
66
SOURCE
TRACK
expressed in Ohms.
(kOhms) for 12 bits
) is lower than 15 t
Mux.
Ron
Sample & Hold
Csample
(1)
Min
64
62
CP_ADC
Z
14
19
30
41
52
63
74
85
.
SOURCE
Typ
-76
70
68
12-bit
ADC
Core
(kOhms) for 10 bits
Max
-66
74
SAM4S
Units
dB
dB
dB
1115