TCM4400 Datasheet, PDF (22/72 Pages) Texas Instruments – GSM/DCS BASEBAND AND VOICE A/D AND D/A RF INTERFACE CIRCUIT

2.9.2 AGC Output Stage
PARAMETER
TEST CONDITIONS MIN TYP MAX UNIT
Output voltage with code
max
(AVDD3/5 = 3 V ± 10%) Bit AGCSWG = 0
2 2.2 2.4 V
Offset voltage with code 000 (AVDD3/5 = 3 V ± 10%)
Output swing with code max (AVDD3/5 = 5 V ± 5%)
Offset voltage with code 000 (AVDD3/5 = 5 V ± 5%)
Output voltage in power down
Bit AGCSWG = 0
Bit AGCSWG = 1
Bit AGCSWG = 1
0.18 0.24 0.30 V
4 4.4 4.8 V
0.36 0.48 0.60 V
0
V
DC power supply sensitivity
1%
Output impedance in power down
200
kΩ
Load resistance
10
kΩ
Load capacitance
50 pF
2.10 Automatic Frequency Control (AFC)
2.10.1 AFC 13-bit DAC
PARAMETER
TEST CONDITIONS
AFCCK1 = 1, AFCCK0 = 1
Sampling frequency, fs
AFCCK1 = 1, AFCCK0 = 0
AFCCK1 = 0, AFCCK0 = 1
AFCCK1 = 0, AFCCK0 = 0
Integral nonlinearity from 0 to 75% output range Best fitting line
Differential nonlinearity from 0 to 75% output
range
Settling time
DC power-supply sensitivity
Over power supply range:
at 2.0 V for AFCZ = 0 or
at 4.0V for AFCZ = 1
MIN TYP MAX UNIT
2
MHz
1
MHz
0.5
MHz
0.25
MHz
±1
LSB
±1
LSB
1 µs
1%
2.10.2 AFC Output Stage
PARAMETER
Internal output resistance (± 30% tolerance)
Internal output resistance (± 30% tolerance)
External filtering capacitance
Output voltage with code max
Output voltage with code max
Output voltage with code min
Output voltage with code min
Output voltage in power down
(AVDD3/5 = 3 V)
(AVDD3/5 = 5 V)
(AVDD3/5 = 3 V)
(AVDD3/5 = 5 V)
TEST CONDITIONS
Bit AFCZ = 0
Bit AFCZ = 1
Bit AFCZ = 1
Bit AFCZ = 0
Bit AFCZ = 1
Bit AFCZ = 0
Bit AFCZ = 1
Output impedance in power down
Bit AFCZ= 0, Bit AFCZ=1
MIN TYP MAX UNIT
25
kΩ
50
kΩ
33
nF
2 2.5 2.8 V
4 4.7 5.1 V
0
3
6 mV
0
5
10 mV
0
V
25
kΩ
50
2–8