Datasheet

Data Sheet ADP1649
Rev. 0 | Page 7 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Figure 4. Pin Configuration
Table 6. Pin Function Descriptions
Pin No. Mnemonic Description
A1 PGND Power Ground.
A2 SGND Signal Ground.
A3 VIN Input Voltage for the Device. Connect an input bypass capacitor close to this pin.
B1
SW
Boost Switch. Connect the power inductor between SW and the input capacitor.
B2 GPIO2 General-Purpose Input/Output for the ILED/TxMASK2/ADC Modes. These modes are register selectable. This is
a multifunction pin for the red indicator LED current source, TxMASK2, or ADC input.
ILED Mode. For the ILED mode, connect this pin to the red LED anode. Connect the LED cathode to power
ground.
TxMASK2 Mode. TheTxMASK2 function of this pin reduces the current to the programmable TxMASK2 current.
ADC Mode. The ADC function of this pin is used as the input pin for the ADC.
B3 GPIO1 General-Purpose Input/Output for the Torch/TxMASK1 Modes. These modes are register selectable. This is a
multifunction pin for the external torch mode or TxMASK1 input.
Torch Mode. Enables the integrated circuit (IC) in direct torch mode.
TxMASK1 Mode. Reduces the flash current to the programmable TxMASK1 current.
C1 VOUT Boost Output. Connect an output bypass capacitor very close to this pin. VOUT is the output for the 5 V
external voltage mode.
C2 STROBE Strobe Signal Input. STROBE synchronizes the flash pulse to the image capture. In most cases, this signal
comes directly from the image sensor.
C3 EN Enable. Set EN low to bring the quiescent current (I
Q
) to <1 µA. Registers are set to their defaults when EN is
brought from low to high.
D1
LED_OUT
LED Current Source. Connect the LED_OUT pin to the anode of the flash LED.
D2
SDA
I
2
C Data Signal in I
2
C Mode.
D3 SCL I
2
C Clock Signal in I
2
C Mode.
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
PGND SGND VIN
SW
GPIO2
GPIO1
VOUT STROBE EN
LED_OUT SDA SCL
1
A
B
C
D
2 3
BALL A1
INDICATOR
10779-004