Texas Instruments TCM4300 - Manual (Page 19)

2–4
2.4.5 Transmit I and Q Channel Outputs
PARAMETER MIN TYP MAX UNIT
Peak output voltage full scale centered at VCM
Differential 2.24
Vp Peak output voltage full scale, centered at VCM
Single ended 1.12
Vp
Nominal output-level (constellation radius) centered Differential 1.5
V
Nominal output level (constellation radius) centered
at VCM
Single ended 0.75
V
Low-level drift
±
200 PPM/
°
C
Transmit error vector magnitude (EVM) 3% 4%
Resolution 8 bits
S/(N+D) ratio at differential outputs 48 52 dB
Gain error (I or Q channel) ± 8% ± 12%
Gain mismatch between I and Q ± 0.3 dB
Gain sampling mismatch between I and Q 20 ns
Zero code error differential
±
80 mV
Zero code error, each output, with respect to VCM
±
80 mV
Zero code error, I to Q, with respect to other channel (differential or
single ended)
± 10 mV
Load impedance, between P and N terminals 10 k
Ω
Transmit offset DACs I and Q resolution 6 bits
Transmit offset DACs I and Q average step size 2.9 3.4 3.9 mV
Transmit offset DACs I and Q full-scale positive output 105.4 mV
Transmit offset DACs I and Q full-scale negative output – 108.8 mV
Transmit offset DACs differential nonlinearity
±
1.1 LSB
Transmit offset DACs integral nonlinearity
±
1.1 LSB
2.4.6 Auxiliary D/A Converters
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
O
AVDD > 3 V†, AUXFS [1:0] = 00 0.2 2.5
V Output range AVDD > 4.5 V†, AUXFS [1:0] = 10 0.2 4 V p g
AVDD > 5 V†, AUXFS [1:0] = 11 0.2 4.5
Resolution AGC, AFC, PWRCONT
DACs
8 bits
Resolution LCDCONTR DAC 4 bits
Gain + offset error (full scale) AGC,
AFC, PWRCONT DAC
± 3%
Gain + offset error (full scale)
LCDCONTR DAC
± 7%
Differential nonlinearity
±
0.75
±
1 LSB
Integral nonlinearity
±
0.75
±
1 LSB
† Range settings depends only on AUXFS [1:0]. The supply voltage is not detected.