ML7020 Просмотр технического описания (PDF) - Oki Electric Industry
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ML7020 Datasheet PDF : 19 Pages
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1Semiconductor
FEDL7020-02
ML7020
AC Characteristics (DTMF Section)
Parameter
Transmit level
Transmit signal level
relative value
Transmit signal frequency
deviation
Transmit signal distortion
rate
DTMF detection level
DTMF non-detection level
Detection frequency band
Non-detection frequency
band
Level difference between
two received frequencies
Permissible received
noise level
Received dial tone
elimination ratio
Signal repetition period
Input signal persistence
duration
Signal quiet duration
Instantaneous break
protection period
Detection delay time
Detection hold time
SP delay time
Signal repetition period
Input signal persistence
duration
Signal quiet duration
Instantaneous break
protection period
Detection delay time
Detection hold time
SP delay time
ATT attenuation
Symbol
VDTTL
VDTTH
Condition
LO–, LO+_Differential *1
(VDD = 4.5 to 5.5 V, Ta = –40 to +85°C)
Min. Typ. Max. Unit
Lower group –7.0 –4.5 –3.0 dBm
tone
Higher group
tone
–5.5
–2.5
–1.0 dBm
VDTDF (Higher group tone) – (lower group tone)
1
2
3 dB
fDDT
Relative to the nominal frequency
–1.5 — +1.5 %
THDDT (Harmonic waves) – (fundamental wave) —
— –23 dB
VDETDT
VREJDT
fDETDT
For one frequency
For one frequency
Relative to the nominal frequency
–42 — –6 dBm
—
— –60 dBm
—
— ±1.5 %
fREJDT
Relative to the nominal frequency
±3.8 —- — %
VTWIST (Higher group tone) – (lower group tone) –6
—
+6 dB
LOSSR6 (Noise level) – (tone level) 0.3 to 3.4 kHz — –12 — dB
VREJCP
380 to 420 Hz
37 53 — dB
tc
120 — — ms
ts
Detection
49
—
— ms
tl During the tone 1, tone 2, Non-detection —
—
24 ms
tp and loop back modes.
30
—
— ms
tba See Figure 3 and Table 3
SP = 0
—
— 0.4 ms
tbb for details.
SP = 1
—
—
10 ms
tg
24 41 49 ms
td
24 28 35 ms
tsp
0.2 0.6 1.0 ms
tc During the tone 3 mode.
60
—
— ms
ts See Figure 3 and Table 3
Detection
35
—
— ms
tl for details.
Non-detection —
—
10 ms
tp
21
—
— ms
tba
SP = 0
—
— 0.4 ms
tbb
SP = 1
—
— 3.0 ms
tg
12 26 37 ms
td
15 20 27 ms
tsp
0.2 0.6 1.0 ms
VATT
Relative to the ATT = “0” reference
–7.5 –6 –4.5 dB
Note: 0 dBm = 0.775 Vrms
*1: The value will be 6 dB smaller for pin LO+ or pin LO– alone.
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