STV0684 datasheet(27/49 Pages) STMICROELECTRONICS

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STV0684

Electrical Characteristics

4.5

AC electrical characteristics

4.5.1

SFP AC parameters

Each SFP is a TTL schmitt trigger bidirectional pad Buffer, 3v3 capable with 2mA drive capability

and Slew-rate Control. The 3.3V IOs comply to the EIA/JEDEC standard JESD8-B.

4.5.2

Audio ADC electrical parameters

Table 7: Audio/ADC electrical characteristics

Symbol

Parameter

Test conditions

Min.

Typ.

Max.

Unit

Fclk

Clock frequency

MHz

Dutymclk

Clk duty cycle

Sample frequency

kHz

Vbias

Bias reference voltage

Vbias / VDDA = 3V

1.5

Rbias

Vbias impedance

Vbias

Ω

RIN

Input impedance

IN+ / IN-

Ω

Cin

Input capacitance

IN+ / IN-

Dyn In

Input dynamic range

ADC Out Full scale IN+ /

IN- Gain 0dB (AGC off)

1.5

Vpp

SNR*

Signal / Noise ratio

Sinewave @FS - 3dB

Gain 0dB

Offset

Offset error

After automatic

calibration

100

LSB

Harm1

1. Input sine wave 1kHz, Fmclk 11.289 MHz, BW = 10Hz-20 kHz, A-weighting filters, output 16 bits

RAW PCM

Signal to peak harmonics

Sinewave @FS - 3dB

Gain 0dB

Sinewave @FS - 3dB

Gain 24dB

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