TS7514 查看數據表（PDF） - STMicroelectronics
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TS7514 Datasheet PDF : 19 Pages
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TS7514
DC AND OPERATING CHARACTERISTICS (continued)
Electrical characteristics are guaranteed over the complete temperature range, with typical load unless
otherwise specified. Typical values are given for : V+ = +5V, V− = -5V and room temperature = 25oC
Symbol
Parameter
Test Conditions Min. Typ. Max. Unit
TRANSMIT FILTER TRANSFER FUNCTION (load conditions : RL = 560Ω, CL = 100pF)
GAR Absolute Gain at 2100Hz
– 0 – dB
GHH Gain Relative to Gain at 1700Hz
Band-pass
< 390Hz
– – - 30 dB
= 390Hz
– – - 35 dB
= 450Hz
– – - 35 dB
= 1100Hz
- 0.5 – +0.5 dB
Band-pass or Low-pass
1100Hz to 2300Hz - 0.5 – +0.5 dB
3300Hz
– – 3 – dB
5800Hz
– – - 15 dB
> 16000Hz
– – - 35 dB
DAR Group Delay (modem transmission)
Main Channel : from 380 to 460Hz
Back Channel : from 1100 to 2300Hz
90 – 110 µs
1.04 – 1.08 ms
ATTENUATOR TRANSFER FUNCTION
ATT Absolute Gain for 0dB Programmed
RAT Attenuation Relative to Programmed Value
Attenuation for Programmed Value = ∞
RLT Relative Attenuation between two Consecutive Steps
TRANSMIT GENERAL CHARACTERISTICS
0.3 0 0.3 dB
- 0.5 - +0.5 dB
70 -
dB
0.8 - 1.2 dB
Modem Amplitude (Att = 0dB)
DTMF Amplitude (Att = 0dB)
- Low Frequency Group
- Low Frequency Group versus Low Frequency Group
Psophometric Noise
390Hz
450Hz
1300Hz
2100Hz
+3.5 – +4.5 dBm
+3.5 – +4.5 dBm
+3.5 – +4.5 dBm
+3.5 – +4.5 dBm
- 3 – - 1.5 dBm
+1.5 – +2.5 dB
– – 250 µV
RECEIVE FILTER TRANSFER FUNCTION
GAR Absolute Gain at 1100Hz - Main Channel
(0dB programmed)
GRR Gain Relative to the Gain at 1300Hz
(0dB programmed)
GAR
GR R
Absolute Gain at 420Hz
(back channel - narrow band) (0dB programmed)
Gain Relative to Gain at 420Hz (0dB programmed)
GAR
GR R
Absolute Gain at 425Hz (tone detection or back
channel wide band) (0dB programmed)
Gain Relative to Gain at 425Hz (0dB programmed)
Psophometric Noise
< 150Hz
150Hz to 450Hz
1300Hz
2100Hz
2300Hz
5500Hz to 10000Hz
> 10000Hz
< 150Hz
380Hz
400Hz to 440Hz
460Hz
1100Hz to 10000Hz
> 10000Hz
< 112Hz
275Hz
300Hz to 525Hz
575Hz
1375Hz to 10000Hz
> 10000Hz
– 0.5 – + 0.5 dB
– – – 60 dB
– – – 50 dB
– 0.5 – 0.5 dB
1.1 1.8 2.3 dB
– – 2.7 dB
– – – 50 dB
– – – 60 dB
0.5 – + 0.5 dB
– – – 50 dB
– – + 0.5 dB
– 0.5 – + 0.5 dB
– – + 0.5 dB
– – – 50 dB
– – – 60 dB
– 0.5 – + 0.5 dB
– – – 50 dB
– – + 0.5 dB
– 0.5 – + 0.5 dB
– – + 0.5 dB
– – – 50 dB
– – – 60 dB
– – 300 µV
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