Texas Instruments TCM4300 User Manual
Page 18
2–3
2.4.3
Terminal Impedance
FUNCTION
MIN
TYP†
MAX
UNIT
Receive channel input impedance (single ended), RXIP/N and RXQP/N
40
70
k
Ω
Transmit channel output impedance (single ended), TXIP/N and TXQP/N
40
50
100
Ω
FM input impedance, WBD
25
200
k
Ω
MCLKOUT impedance
MCLKOUT at 3.3 V
240
Ω
MCLKOUT impedance
MCLKOUT at 5 V
180
Ω
† All typical values are at DVDD = 5 V, AVDD = 5 V, and TA = 25
°
C, unless otherwise specified.
2.4.4
RXIP, RXIN, RXQP, and RXQN Inputs (AV
DD
= 3 V, 4.5 V, 5 V)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input voltage range
0.3
AVDD– 0.3
V
Input voltage for full-
Differential
0.5
Vp-p
Input voltage for full
scale digital output
Single ended
0.5
Vp-p
Nominal operating
Differential
0.125
Vp p‡
Nominal operating
level
Single ended
0.125
Vp-p‡
Input CMRR (RXI, RXQ)
45
dB
Sampling frequency, SINT (digital
mode)
48.6
kHz
Sampling frequency, SINT (analog
mode)
40
kHz
Receive error vector magnitude (EVM)
5%
6%
I/Q sample timing skew
Input signal 0 – 15 kHz
50
ns
A / D resolution
10
bits
Signal to noise-plus distortion
Input at full scale – 1 dB
54
58
dB
Integral nonlinearity
0 dB to – 60 dB input
1
LSB
Gain error (I or Q channel)
±
7%
Gain mismatch between I and Q
±
0.3
dB
Differential dc offset voltage
±
30
mV
FM input sensitivity, full scale
(
14 kHz deviation)
2.5
Vp-p
FM input dc offset (relative to VHR)
±
80
mV
FM input idle channel noise, below
full-scale input
– 50
dB
FM gain error
±
6%
Power supply rejection
f = 0 kHz to 15 kHz
40
dB
‡ Provides 12 dB headroom for AGC fading conditions.