K30P64M72SF1 Datasheet, PDF (44/68 Pages) Freescale Semiconductor, Inc – K30 Sub-Family

Peripheral operating requirements and behaviors
Table 26. 16-bit ADC with PGA characteristics (continued)
Symbol
THD
Description
Total harmonic
distortion
Conditions
• Gain=1
• Gain=64
Min.
Typ.¹
Max.
Unit
85
100
—
dB
49
95
—
dB
SFDR
Spurious free
dynamic range
• Gain=1
• Gain=64
85
105
—
dB
53
88
—
dB
ENOB
Effective number
of bits
• Gain=1, Average=4
• Gain=64, Average=4
11.6
13.4
—
bits
7.2
9.6
—
bits
• Gain=1, Average=32
12.8
14.5
—
bits
• Gain=2, Average=32
11.0
14.3
—
bits
• Gain=4, Average=32
7.9
13.8
—
bits
• Gain=8, Average=32
7.3
13.1
—
bits
• Gain=16, Average=32
6.8
12.5
—
bits
• Gain=32, Average=32
6.8
11.5
—
bits
• Gain=64, Average=32
7.5
10.6
—
bits
Notes
16-bit
differential
mode,
Average=32,
f_in=100Hz
16-bit
differential
mode,
Average=32,
f_in=100Hz
16-bit
differential
mode,f_in=100H
z
SINAD
Signal-to-noise
plus distortion
ratio
See ENOB
6.02 × ENOB + 1.76
dB
1. Typical values assume V_DDA =3.0V, Temp=25°C, f_ADCK=6MHz unless otherwise stated.
2. This current is a PGA module adder, in addition to ADC conversion currents.
3. Between IN+ and IN-. The PGA draws a DC current from the input terminals. The magnitude of the DC current is a strong
function of input common mode voltage (V_CM) and the PGA gain.
4. _{Gain = 2}^PGAG
5. After changing the PGA gain setting, a minimum of 2 ADC+PGA conversions should be ignored.
6. Limit the input signal swing so that the PGA does not saturate during operation. Input signal swing is dependent on the
PGA reference voltage and gain setting.
6.6.2 CMP and 6-bit DAC electrical specifications
Table 27. Comparator and 6-bit DAC electrical specifications
Symbol
V_DD
I_DDHS
I_DDLS
V_AIN
V_AIO
Description
Supply voltage
Supply current, High-speed mode (EN=1, PMODE=1)
Supply current, low-speed mode (EN=1, PMODE=0)
Analog input voltage
Analog input offset voltage
Min.
1.71
—
—
V_SS – 0.3
—
Typ.
—
—
—
—
—
Max.
3.6
200
20
V_DD
20
Unit
V
μA
μA
V
mV
Table continues on the next page...
K30 Sub-Family Data Sheet, Rev. 2, 4/2012.
44
Freescale Semiconductor, Inc.