TLV320AD12A

3.3-V INTEGRATED ADSL CODEC

SLWS088B – JULY 1999 – REVISED MARCH 2000

13

POST OFFICE BOX 655303

electrical characteristics over recommended operating free-air temperature range, typical at

otherwise noted)

TX channel (measured differentially, PAA = 0 dB, unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Signal bandwidth

1104

kHz

Conversion rate

8.832

MHz

Effective number of bits (ENOB)

12

Channel gain error

43.125 kHz at –1 dB

–1

dB

PAA step-gain error

0.1

dB

Crosstalk

RX to TX channel

–67

dB

Group delay

5

µs

Power supply rejection ratio (PSRR)

Input = multitone at –10 dB (see Note 9)

60

dB

Full scale output voltage

Load = 4000

Ω (differentially), single-ended measured

AVDD_TX/2

±0.75

V

Full-scale output voltage

Load = 4000

Ω (differentially), differentially measured

3

Vp-p

AC Performance

SNR Signal-to-noise ratio

74

THD

Total harmonic distortion ratio

43 125 kHz at –3 dB (see Note 7)

84

dB

TSNR Signal-to-noise + harmonic distortion

ratio

43.125 kHz at –3 dB (see Note 7)

73

dB

MT

Missing tone test (see Note 8)

120.750 kHz (missing tone)

65

dB

MT

Missing-tone test (see Note 8)

750.375 kHz (missing tone)

65

dB

Channel Frequency Response (refer to Figure 5)

500 kHz

0.1

–1.5

dB

Gain relative to gain at 100 kHz

1000 kHz

0.1

–1.5

dB

g

(25.875 kHz DHPF is bypassed)

1400 kHz

–1.5

dB

1700 kHz

–7.2

dB

NOTES:

7. 250 tones input signal, 25.875 to 1104 kHz, 4.3125 kHz/step, 0 dB

8. Multitone signal (kHz): 30, 60, 200, 300, 500, 600, 700, 800, 1000

9. The input signal is the digital equivalent of a sine wave (digital full scale = 0 dB). The nominal differential output with this input

condition is 3 Vpp.

reference outputs (see Note 10)

MIN

NOM

MAX

UNIT

REFP

REF plus output voltage

2.5

REFM

REF minus output voltage

AVDD REF = 3 3 V

0.5

V

VMID_REF

REF mid output voltage

AVDD_REF = 3.3 V

1.5

V

VMID_ADC

Receive channel mid-input voltage

1.5

NOTE 10: All the reference outputs should not be used as voltage source.

digital inputs

MIN

NOM

MAX

UNIT

VOH

High-level output voltage

IOH = 0.5 mA

2.4

V

VOL

Low-level output voltage

IOL = –0.5 mA

0.6

V