ADN8835ACPZ-R7 datasheet(11/27 Pages) AD

11 / 27 page

Data Sheet

ADN8835

Rev. B | Page 11 of 27

Figure 17. VTEC Voltage Reading Error vs. TEC Voltage in Cooling Mode

Figure 18. VTEC Voltage Reading Error vs. TEC Voltage in Heating Mode

Figure 19. Cooling to Heating Transition

Figure 20. Zero-Crossing TEC Current Zoom In from Heating to Cooling

Figure 21. Zero-Crossing TEC Current Zoom In from Cooling to Heating

Figure 22. Typical Enable Waveforms in Cooling Mode,

VIN = 5 V, Load = 1 Ω, TEC Current = 2 A

–20

–15

–10

–5

TEC VOLTAGE (V)

VIN = 3.3V

VIN = 5V

–20

–15

–10

–5

TEC VOLTAGE (V)

VIN = 3.3V

VIN = 5V

CH1 1.00V BW CH2 1.00V BW

CH4 500mA Ω BW

M200ms

500kS/s 1M POINTS

CH4

–500mA

LDO (TEC+)

PWM

(TEC–)

TEC

CURRENT

CH1 1.00V BW CH2 1.00V BW

CH4 500mA Ω BW

M20.0ms

1.0MS/s

1M POINTS

CH4

20.0mA

LDO (TEC+)

TEC CURRENT

PWM (TEC–)

15.1000ms

CH1 1.00V BW CH2 1.00V BW

CH4 500mA Ω BW

M20.0ms

5.0MS/s

1M POINTS

CH4

20.0mA

LDO (TEC+)

TEC CURRENT

PWM (TEC–)

15.8000ms

CH1 2.00V BW CH2 1.00V BW

CH4 1.00A Ω BW

M40.0ms

2.50MS/s

1M POINTS

CH3

1.60V

LDO (TEC+)

ENABLE

TEC CURRENT

PWM (TEC–)

79.6000ms

CH3 5.00V BW

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