BTM510/511 Multimedia Module

Datasheet

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2.3

Operating Parameters

Table 3: Operating parameters

Recommended Operating Conditions

Operating Condition

Min

Max

VDD_UART

1.7

3.6

VDD_IO

1.7

3.3

VDD_IN

3.0

3.6

2.4

Voltage Specifications

Table 4: Voltage specifications (VUART)

Logic Levels (VUART)

Input Voltage Levels

Min

Typical

Max

Vih

0.7VDD_UART

Vil

-0.4

+0.8

Voh (Iout = -4mA)

VDD_UART – 0.4

Vol (Iout = 4mA)

0

0.4

Table 5: Voltage specifications (VIO)

Logic Levels (VIO)

0.625 VDD_UART

VDD_IO+0.3

-0.3

0.25VDD_IO

Output Voltage Levels

0.75VDD_IO

VDD_IO

0

0.125

Notes for PCB layout:

1. The RF output pin must match to a 50 Ω strip-line or coplanar waveguide on the BTM510 (no antenna).

2. Ensure there are no exposed conductors under the module to avoid shorts to the module test points.

3. The PCB footprint is provided for guidance only. Users may wish to modify the PCB land dimensions to suit

their specific manufacturing or process.

2.5

Audio Design Requirements

The audio inputs of the BTM510/511 can operate in either line input mode or microphone mode. The input

circuit has a two stage amplifier – the first stage provides a fixed 24 dB gain and the second a variable gain of

between -3 dB and 18 dB. If an input gain of less than 24 dB is selected, then the first stage is switched out and

the module is operating in line input mode. The BTM511 can support both Single-Ended and Fully Differential

Stereo Line Input (Figure 3).