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參數(shù)資料
| 型號： | MSP58C20 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Audio-Band Converter |
| 中文描述： | 語音頻帶轉(zhuǎn)換器 |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 298K |
| 代理商： | MSP58C20 |
MSP58C20
AUDIO-BAND CONVERTER
SPSS015B – DECEMBER 1993 – REVISED JULY 1996
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
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)
ADC transmit characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Transmit absolute gain
tolerance
VDD = 5 V,
TA = 25°C,
Input = 1-kHz sine wave at – 13 dBrl
±0.5
dB
Tit
i
Input = 1-kHz sine wave,
Gi
f
l
i
Input level = – 1 dBrl to – 43 dBrl
±0.25
Transmit gain versus
input level
Gain reference level = gain
measured at input level of
Input level = – 43 dBrl to – 53 dBrl
±0.5
dB
in ut level
measured at in ut level of
–13 dBrl,
See Note 3
Input level = – 53 dBrl to – 58 dBrl
±1
Transmit gain versus
VDD =4 75Vto5 25 V
Input = 1 kHz at
13 dBrl
±015
dB
g
supply voltage
VDD = 4.75 V to 5.25 V,
Input = 1 kHz at – 13 dBrl
±0.15
dB
Transmit idle channel
in-band noise
Psophometrically-weighted output noise,
Transmit channel idle
–76
dBrlp
f = 50 Hz
–80
f = 300 Hz
–82
Transmit idle channel
TA = 25°C,
f = 3.4 kHz
–82
Transmit idle channel
single-frequency noise
TA = 25 C,
FFT rectangular window bandwidth = 125 Hz,
f = 4 kHz
–80
dBrl
spectrum (see Note 4)
Transmit channel idle,
See Figure 5
f = 7 kHz
–72
f = 12 kHz
–65
f = 20 kHz
–64
Transmit single-
frequency distortion
Input = one frequency in 0.7-kHz to 1.1-kHz band at – 4 dBrl,
Measured first two harmonics
–50
dB
Transmit 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
Transmit signal to total
VDD = 5.25 V,
TA = 25°C,
Input level = – 70 dBrl
–13
Transmit-signal-to-total-
noise-plus-distortion ratio
(see Note 5)
A
,
Input = 1-kHz sine wave,
Measured psophometrically-
Input level = – 20 dBrl
50
dB
(see Note 5)
y
weighted total noise plus
distortion,
See Figure 6
Input level = –1 dBrl
50
Transmit gain variations
versus input frequency
(see Notes 4 and 6)
f = 0.1 kHz to 4 kHz,
Input level = – 13 dBrl
±0.6
dB
Transmit power supply
rejection
See Note 7
30
dB
Ilk
Leakage current
Voltage applied to terminal is between VSS and VDD,
AIP
–10
10
A
Ilkg
Leakage current
g
SS
DD,
PWDA = H (power-down mode)
AIM
–10
10
A
Receive-to-transmit
crosstalk
Receive input = one frequency in 0.3-kHz to 3.4-kHz band at – 3 dBrl,
Crosstalk measured at transmit digital output,
Transmit channel idle
–70
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 ADC
theoretical overload point. This overload point corresponds to a sine wave at the input of the modulator with peak amplitude equal to 2.25 V dBrlp
is a psophometrically-weighted value being compared against a psophometrically-weighted reference.
NOTES:
3. Input satisfies CCITT G.714 15.3, Method 2.
4. This parameter is characterized but not tested.
5. Input satisfies CCITT G.714 14.3, Method 2.
6. Gain is relative to gain at 1 kHz.
7. The power-supply rejection measurement is made with a 50-mVrms, 0- to 20-kHz signal applied to VDD and with the transmit channel
idle.
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