TLFD500 Datasheet, PDF (29/38 Pages) Texas Instruments – 3.3 V INTEGRATED G.LITE ANALOG FRONT END

TLFD500PN
3.3 V INTEGRATED G.LITE ANALOG FRONT END
recommended operating conditions (continued)
clock
Input clock frequency
Input clock duty cycle
SLAS207B – JUNE 1999 – REVISED MAY 2000
MIN NOM
35.328
50%
MAX
UNIT
MHz
electrical characteristics over recommended operating free-air temperature range,
f_MCLKIN = 35.328 MHz, AVDD_RX/AVDD_TX/AVDD_REF = 3.3 V, DVDD = DVDD_IO = DVDD_RX =
3.3 V, (unless otherwise noted)
TX channel (measured differentially)
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Gain error
–1.5
1.5 dB
PAA step gain error
±0.25
dB
DC offset
50 100 mV
Cross-talk
RX to TX channel
–70
dB
Idle channel noise
65
µVrms
Group delay
30
µs
Power supply rejection ratio (PSRR)
200 mVp-p at 75 kHz
70
dB
Analog output voltage
Load = 2000 Ω
3
Vp-p
AC Performance
SNR Signal-to-noise ratio
70
dB
THD Total harmonic distortion ratio
70 kHz at –1 dB (see Note 14)
75
dB
TSNR Signal-to-noise + harmonic distortion ratio
68
dB
30.1875 kHz
–71
MT Missing-tone test (see Note 15)
81.9375 kHz
–71
dB
129.375 kHz
–71
Channel Frequency Response (Refer to Figure 13)
30 kHz
–1.5
1.5
Filter gain relative to gain at 77.625 kHz
Pass-band (ripple)
–1
1 dB
180 kHz
–70
NOTES: 14. The input signal is the digital equivalent of a sine wave (digital full scale = 0 dB). The normal differential output with this input condition
is 3 Vpp.
15. 27 tones, 25.875 to 138 kHz, 4.3125 kHz/step, 0 dB
reference outputs
REFP
REFM
TXBANDGAP
RXBANDGAP
VMID_RX
AVDD_REF = 3.3 V
MIN NOM MAX UNIT
2.2 2.5 2.8 V
0.3 0.5 0.7 V
1.4 1.5 1.6 V
1.4 1.5 1.6 V
1.5
V
digital outputs
VOH High-level output voltage
VOL Low-level output voltage
IOH = 2 mA
IOL = –2 mA
MIN NOM MAX UNIT
2.4
V
0.6
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