MSP58C20 Datasheet, PDF (7/17 Pages) Texas Instruments – AUDIO-BAND CONVERTER

MSP58C20
AUDIO-BAND CONVERTER
SPSS015B – DECEMBER 1993 – REVISED JULY 1996
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature, ADCLK input frequency = 1.024 MHz, PWDA = L and PWAD = L (power-up mode)
(unless otherwise noted) (continued)
DAC receive characteristics^†
PARAMETER
TEST CONDITIONS
MIN TYP MAX UNIT
Receive gain tolerance
VDD = 5 V,
TA = 25°C,
Input = 1-kHz sine wave at – 28 dBrl
± 0.5 dB
Receive gain versus input level
Input = 1-kHz sine wave,
Gain reference level = gain
measured at input level of –28 dBrl,
See Note 8
Input level = – 1 dBrl to – 43 dBrl
Input level = – 43 dBrl to – 53 dBrl
Input level = – 53 dBrl to – 58 dBrl
± 0.25
± 0.5 dB
±1
Receive gain versus
supply voltage
VDD = 4.75 V to 5.25 V,
Digital input = 1-kHz sine wave at – 28 dBrl
± 0.15 dB
Receive idle channel in-band
noise
Receive channel idle,
Psophometrically-weighted output noise
– 75
dBrlp
Receive idle channel
single-frequency noise
spectrum (see Note 4)
TA = 25°C,
Receive channel idle,
Measurement bandwidth = 125 Hz,
See Figure 6
f = 100 Hz
f = 3 kHz
f = 10 kHz
f = 100 kHz
– 82
– 82
dBrl
– 64
– 64
Receive single-frequency
distortion
Input = one frequency in 0.7-kHz to 1.1-kHz band at – 6 dBrl,
Measured first two harmonics
– 50 dB
Receive intermodulation
distortion (see Note 4)
Input = two frequencies in 0.3-kHz to 3.4-kHz band,
Input levels = – 7 dBrl and – 24 dBrl,
Measured second and third intermodulation products
– 40 dBrl
VDD = 5.25 V, TA = 25°C,
Input level = –70 dBrl
0
Receive signal-to-total-noise- Input = 1-kHz sine wave,
plus-distortion ratio
Measured psophometrically-
Input level = –20 dBrl
50
dB
(see Note 9)
weighted total noise plus
distortion,
See Figure 7
Input level = –1 dBrl
50
f = 156 Hz to 4 kHz
– 0.6‡
0.6
f = 4.6875 kHz
– 0.7
– 0.4
Receive gain variations versus
input sine wave frequency
(see Note 6)
VDD = 4.75 V, TA = 25°C,
Input level = –13 dBrl,
See Figure 9
f = 6.25 kHz
f = 7.8125 kHz
f = 9.375 kHz
f = 10.9375 kHz
– 1.75
– 3.35
– 5.25
– 7.25
– 1.4
– 2.9
dB
– 4.8
– 6.8
f = 12.5 kHz
– 9.2
– 8.7
f = 15.625 kHz
– 12.8
– 12.2
Receive power supply rejection See Note 10
30
dB
† _{This table contains specifications in which the power levels are expressed in dBrl; dBrl stands for dB above reference level. 0 dBrl is the DAC}
overload point. Overload levels of the digital modulator (see parameter measurement information) are 32767 and – 32767 peak values. The 0-dBrl
level is related to maximum differential output voltage, which is typically 2.25 V.
‡ _{The algebraic convention, in which the less positive (more negative) limit is designated as minimum, is used in this data sheet for receive gain}
variations versus input sine-wave frequency.
NOTES: 4. This parameter is characterized but not tested.
6. Gain is relative to gain at 1 kHz.
8. Input satisfies CCITT G.714 15.4 Method 2.
9. Input satisfies CCITT G.714 14.4 Method 2.
10. The power supply rejection measurement is made with a 50-mVrms, 0-kHz to 20-kHz signal applied to VDD and with the receive
channel idle.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
7