Datasheet
78M6631 Data Sheet DS_6631_056
20 Rev 2
2.4.9 ADC Converter, V3P3A Referenced
Table 13 shows the performance specifications for the ADC converter, V3P3A referenced. For this data,
FIR_LEN = 0, VREF_DIS = 0 and LSB values do not include the 9-bit left shift at the CE input.
Table 13: ADC Converter Performance Specifications
Parameter Conditio
n Min Typ Max Unit
Recommended Input Range
(V
IN
- V3P3A)
-250
+250
mV
peak
Voltage to Current Crosstalk
)cos(
*10
6
VcrosstalkVin
Vin
Vcrosstalk
V
IN
= 200 mV peak,
65 Hz, on VA.
Vcrosstalk = largest
measurement on IA or IB
-10
1
+10
1
V/V
THD (First 10 harmonics)
1
:
250 mV-pk
20 mV-pk
V
IN
= 65 Hz,
64 kpts FFT, Blackman-
Harris window
CKCE = 5 MHz
-75
1
-90
1
dB
dB
Input Impedance
V
IN
= 65 Hz 40
90
k
Temperature coefficient of Input
Impedance
V
IN
= 65 Hz
1.7
/°C
[M40MHZ,
M26MHZ] =
[00], [10], or [11]
nV/
LSB
LSB size
3
3
75.4
25.1
L
VV
REFLSB
L = FIR length
[M40MHZ,
M26MHZ] =
[01]
nV/
LSB
[M40MHZ,
M26MHZ] =
[00], [10], or [11]
LSB
Digital Full Scale
3
3
L
L = FIR length
[M40MHZ,
M26MHZ] =
[01]
LSB
ADC Gain Error versus
%Power Supply Variation
3.3/33100
/35710
6
APV
VnVNout
INPK
V
IN
= 200 mV pk, 65
Hz, V3P3A=3.0 V, 3.6
V
50 ppm/%
Input Offset (V
IN
- V3P3A) -10
+10 mV
1
Guaranteed by design; not production tested.