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M-88L70-01T Datasheet(PDF) 5 Page - Clare, Inc. |
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M-88L70-01T Datasheet(HTML) 5 Page - Clare, Inc. |
5 / 8 page M-88L70 www.clare.com 5 Rev. 1 Table 5 Operating Characteristics - Gain Setting Amplifier PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS Input leakage current I N - 100 - nA V SS < VIN < VDD Input resistance R IN -10 - M Ω Input offset voltage V OS -15 25 mV Power supply rejection PSRR 50 60 - dB 1 kHz Common mode rejection CMRR 40 60 - dB -3.0V < V IN < 3.0V DC open loop voltage gain A VOL 32 65 - dB Open loop unity gain bandwidth f C 0.3 1.0 - MHz Output voltage swing V O - 2.2 - V P-P RL 3 100 k Ω to V SS Tolerable capacitive load (GS) C L - - 100 pF Tolerable resistive load (GS) R L 50 - - k Ω Common mode range V CM - 1.5 - V P-P No load All voltages referenced to V SS unless otherwise noted. VDD = 3.0 V +20%/-10%, VSS = 0 V, TA = -40˚C to + +85˚C Table 6 AC Characteristics PARAMETER SYMBOL MIN TYP MAX UNITS NOTES Valid input signal levels - -36 - -6.4 dBm 1,2,3,4,5,8 (each tone of composite signal) - 12.3 - 370 mVRMS Positive twist accept - - - 6 dB Negative twist accept - - - 6 dB Frequency deviation accept limit - - - 1.5% ±2 Hz Nom. 2,3,5,8,10 Frequency deviation reject limit - ±3.5% - - Nom. 2,3,5 Third tone tolerance - - -16 - dB 2,3,4,5,8,9,13,14 Noise tolerance - - -12 - dB 2,3,4,5,6,8,9 Dial tone tolerance - - +22 - dB 2,3,4,5,7,8,9 Tone present detection time t DP 5 8 14 ms See Figure 8 Tone absent detection time t DA 0.5 3 8.5 ms Minimum tone duration accept t REC - 40 ms User adjustable (see Figures 3 Maximum tone duration reject t REC 20 - - ms and Figure 5) Minimum interdigit pause accept t ID -- 40 ms Maximum interdigit pause reject t DO 20 - - ms Propagation delay (St to Q) t PQ -13 - µs OE = V DD Propagation delay (St to StD) t PStD -8 - µs Output data setup (Q to StD) t QStD - 3.4 - µs Propagation delay (OE to Q), enable t PTE - 200 - ns R L = 10kΩ, CL = 50 pF Propagation delay (OE to Q), disable t PTD - 500 - ns Crystal clock frequency f CLK 3.5759 3.5795 3.5831 MHz Clock output (OSC2), capacitive load C LO -- 30 pF All voltages referenced to VSS unless otherwise noted. For typical values V DD = 3.0 V, VSS = 0 V, TA = -40˚C to +85˚C, fCLK = 3.579545 MHz. Notes: 1. dBm = decibels above or below a reference power of 1 mW into a 600 Ω load. 2. Digit sequence consists of all 16 DTMF tones. 3. Tone duration = 40 ms. Tone pause = 40 ms. 4. Nominal DTMF frequencies are used, measured at GS. 5. Both tones in the composite signal have an equal amplitude. 6. Bandwidth limited (0 to 3 kHz) Gaussian noise. 7. The precise dial tone frequencies are (350 and 440 Hz) ± 2%. 8. For an error rate of better than 1 in 10,000. 9. Referenced to lowest level frequency component in DTMF signal. 10. Minimum signal acceptance level is measured with specified maximum frequency deviation. 11. Input pins defined as IN+, IN-, and OE. 12. External voltage source used to bias VREF. 13. This parameter also applies to a third tone injected onto the power supply. 14. Referenced to Figure 4. Input DTMF tone level at -28 dBm. |
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