EFM32GG11 datasheet(67/261 Pages) SILABS

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Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Note:

1. Specified configuration for 3X-Gain configuration is: INCBW = 1, HCMDIS = 1, RESINSEL = VSS, VINPUT = 0.5 V, VOUTPUT = 1.5

V. Nominal voltage gain is 3.

2. If the maximum CLOAD is exceeded, an isolation resistor is required for stability. See AN0038 for more information.

3. When INCBW is set to 1 the OPAMP bandwidth is increased. This is allowed only when the non-inverting close-loop gain is ≥ 3,

or the OPAMP may not be stable.

4. Current into the load resistor is excluded. When the OPAMP is connected with closed-loop gain > 1, there will be extra current to

drive the resistor feedback network. The internal resistor feedback network has total resistance of 143.5 kOhm, which will cause

another ~10 µA current when the OPAMP drives 1.5 V between output and ground.

5. Step between 0.2V and VOPA-0.2V, 10%-90% rising/falling range.

6. From enable to output settled. In sample-and-off mode, RC network after OPAMP will contribute extra delay. Settling error < 1mV.

7. In unit gain connection, UGF is the gain-bandwidth product of the OPAMP. In 3x Gain connection, UGF is the gain-bandwidth

product of the OPAMP and 1/3 attenuation of the feedback network.

8. Specified configuration for Unit gain buffer configuration is: INCBW = 0, HCMDIS = 0, RESINSEL = DISABLE. VINPUT = 0.5 V,

VOUTPUT = 0.5 V.

9. When HCMDIS=1 and input common mode transitions the region from VOPA-1.4V to VOPA-1V, input offset will change. PSRR

and CMRR specifications do not apply to this transition region.

4.1.20 LCD Driver

Table 4.28. LCD Driver

Parameter

Symbol

Test Condition

Min

Typ

Max

Unit

Frame rate

fLCDFR

—

100

LCD supply range2

VLCDIN

1.8

—

3.8

LCD output voltage range

VLCD

Current source mode, No external

LCD capacitor

2.0

—

VLCDIN-0.4

Step-down mode with external

LCD capacitor

2.0

—

VLCDIN

Charge pump mode with external

LCD capacitor

2.0

—

1.9 *

VLCDIN

Contrast control step size

STEPCONTRAST Current source mode

—

Charge pump or Step-down mode

—

Contrast control step accura-

cy1

ACCCONTRAST

—

+/-4

—

Note:

1. Step size accuracy is measured relative to the typical step size, and typ value represents one standard deviation.

2. VLCDIN is selectable between the AVDD or DVDD supply pins, depending on EMU_PWRCTRL_ANASW.

EFM32GG11 Family Data Sheet

Electrical Specifications

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