5 Pin Configuration and Functions

Figure 5-1 RGT Package, 16-Pin VQFN With Wettable Flanks and Exposed Thermal Pad (Top View)

Table 5-1 Pin Functions

PIN		TYPE	DESCRIPTION
NAME	NO.	TYPE	DESCRIPTION
EN	6	Input	Device enable pin. EN = logic low = normal operation (default)⁽¹⁾. EN = logic high = power-off mode.
GAIN	16	Input	Gain setting. GAIN = low = 2 kΩ (default)⁽¹⁾. GAIN = high = 20 kΩ.
GND	1, 7	Input	Amplifier ground
IDC_EN	5	Input	Ambient light cancellation (ALC) loop enable. IDC_EN = logic low = enable dc current cancellation (default)⁽¹⁾. IDC_EN = logic high = disable dc current cancellation.
IN	3	Input	Transimpedance amplifier input
NC	4, 8, 13, 15	—	Do not connect
OUT–	11	Output	Inverting amplifier output. When light is incident on the photodiode, the output pin transitions in a negative direction from the no-light condition (APD anode connected to negative bias).
OUT+	10	Output	Noninverting amplifier output. When light is incident on the photodiode, the output pin transitions in a positive direction from the no-light condition (APD anode connected to negative bias).
VDD1	2	Input	Positive power supply for the transimpedance amplifier stage
VDD2	14	Input	Positive power supply for the differential amplifier stage. Tie VDD1 and VDD2 to the same power supply with independent power-supply bypassing.
VOCM	12	Input	Differential-amplifier common-mode output setting
VOD	9	Input	Differential-amplifier differential output offset setting
Thermal pad	Thermal pad	—	Connect the thermal pad to GND or the most negative power supply of the device under test (DUT).

(1) Drive a digital pin with a low-impedance source rather than leaving the pin floating because fast-moving transients can couple into the pin and inadvertently change the logic level.