MT8870D Ver la hoja de datos (PDF) - Mitel Networks

Número de pieza

componentes Descripción

Fabricante

MT8870D

ISO2-CMOS 3 Volt Integrated DTMF Receiver

Mitel Networks 

MT88L70

Operating Characteristics - VDD=3.0V+20%/-10%, VSS=0V, -40°C ≤ TO ≤ +85°C, unless otherwise stated.

Gain Setting Amplifier

Characteristics

Sym Min Typ‡ Max Units

Test Conditions

1 Input leakage current

2 Input resistance

3 Input offset voltage

4 Power supply rejection

IIN

RIN

10

VOS

PSRR 50

100

nA VSS ≤ VIN ≤ VDD

MΩ

25 mV

dB 1 kHz

5 Common mode rejection

CMRR 40

dB VSS + 0.75 V ≤ VIN ≤

VDD-0.75

biased at VRef =1.5 V

6 DC open loop voltage gain

AVOL

32

dB

7 Unity gain bandwidth

fC

0.30

MHz

8 Output voltage swing

VO

2.2

Vpp Load ≥ 100 kΩ to VSS @ GS

9 Maximum capacitive load (GS)

CL

100 pF

10 Resistive load (GS)

RL

50

kΩ

11 Common mode range

VCM

1.5

Vpp No Load

AC Electrical Characteristics - VDD=3.0V +20%/-10%, VSS=0V, -40°C ≤ TO ≤ +85°C, using Test Circuit shown in Fig. 6.

Characteristics

Sym

Min

Typ‡ Max Units

Notes*

1

Valid input signal levels

(each tone of composite

signal)

2

Negative twist accept

-34

15.4

-4.0 dBm 1,2,3,5,6,9

489 mVRMS Min @ VDD=3.6V

Max @ VDD=2.7V

8

dB 2,3,6,9,12

3

Positive twist accept

8

dB 2,3,6,9,12

4

Frequency deviation accept

5

Frequency deviation reject

±1.5% ± 2 Hz

±3.5%

2,3,5,9

2,3,5,9

6

Third zone tolerance

-16

dB 2,3,4,5,9,10

7

Noise tolerance

-12

dB

8

Dial zone tolerance

+22

dB

‡ Typical figures are at 25 °C and are for design aid only: not guaranteed and not subject to production testing.

2,3,4,5,7,9,10

2,3,4,5,8,9,11

*NOTES

1. dBm= decibels above or below a reference power of 1 mW into a 600 ohm load.

2. Digit sequence consists of all DTMF tones.

3. Tone duration= 40 ms, tone pause= 40 ms.

4. Signal condition consists of nominal DTMF frequencies.

5. Both tones in composite signal have an equal amplitude.

6. Tone pair is deviated by ±1.5%± 2 Hz.

7. Bandwidth limited (3 kHz ) Gaussian noise.

8. The precise dial tone frequencies are (350 Hz and 440 Hz) ± 2 %.

9. For an error rate of better than 1 in 10,000.

10. Referenced to lowest level frequency component in DTMF signal.

11. Referenced to the minimum valid accept level.

12. Guaranteed by design and characterization.

4-29

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