Texas Instruments TCM4300 User Manual
Page 20
2–5
2.4.7
Auxiliary D /A Converters Slope (AGC, AFC, PWRCONT)
AUXFS[1:0]
SETTING
SLOPE
NOMINAL LSB
VALUE
(V)
NOMINAL OUTPUT VOLTAGE
FOR DIGITAL CODE = 128
(MIDRANGE)
(V)
NOMINAL OUTPUT VOLTAGE
FOR DIGITAL CODE = 256†
(MAX VALUE)
(V)
00
2.5/256
0.0098
1.25
2.5
01
Do not use
Do not use
Do not use
Do not use
10
4/256
0.0156
2
4
11
4.5/256
0.0176
2.25
4.5
† The maximum input code is 255. The value shown for 256 is extrapolated.
2.4.8
Auxiliary D /A Converters Slope (LCDCONTR)
AUXFS[1:0]
SETTING
SLOPE
NOMINAL LSB
VALUE
(V)
NOMINAL OUTPUT VOLT-
AGE FOR DIGITAL CODE = 8
(MIDRANGE)
(V)
NOMINAL OUTPUT VOLTAGE
FOR DIGITAL CODE = 16§
(MAX VALUE)
(V)
00
2.5/16
0.1563
1.25
2.5
01
Do not use
Do not use
Do not use
Do not use
10
4/16
0.2500
2
4
11
4.5/16
0.2813
2.25
4.5
‡ The maximum input code is 15. The value shown for 16 is extrapolated.
2.4.9
RSSI/Battery A/D Converter
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input range
AVDD = 3 V, 4.5 V, 5 V
0.2
2
V
Resolution
8
bits
Conversion time
AVDD = 3 V, 4.5 V, 5 V
20
µ
s
Gain + offset error (full scale)
±
3%
±
4%
Differential nonlinearity
±
0.75
±
1
LSB
Integral nonlinearity
±
0.75
±
1
LSB
Input resistance
1
2
M
Ω