Block Diagram and Pin Assignment
VCC 5
IN 6
C7
Zt
VEE 8
4 VCC
3 QB
2Q
1 VEE
CXA1684M
Electrical Characteristics
• DC Electrical Characteristics
Item
Symbol
Supply current
IEE
Q
Transimpedance
QB
ZTQ
ZTQB
Max. Input Current before clipping
IIN
Max. Input Current
IIN2
Input voltage
VIN
Output voltage
Q
VOUTQ
QB
VOUTQB
VC
Input capacitance
CIN
(VCC=GND, VEE=–5.46 to –4.75V, Ta=0 to +85°C)
Test Condition
Min.
Typ.
Max.
Unit
input pin left open –15.1 –11.2
mA
2.3
3.9
5.6
kΩ
1.9
3.7
5.4
+100
µA
+1000
VEE+2.5
VEE+1.9
input pin left open
V
VCC–2.6
VEE+1.7
2.0
pF
• AC Electrical Characteristics
(VCC=GND, VEE=–5.46 to –4.75 V, Ta=0 to +85 °C)
Item
Symbol
Test Condition
Min.
Typ.
Max.
Unit
Bandwidth
Q
f–3 dBQ
∗1
(–3 dB)
QB f–3 dBQB
435
630
187
390
MHz
Input Current Noise Spectral
In
fN=1 kHz to 622 MHz
4.0
Density (Mean value)
pA/√Hz
∗1 Assumes photodiode capacitance; CPD<1.0 pF, output load capacitance; Cout=2.0 pF, Q: 620 Ω to VEE,
QB: 1.3k Ω to VEE
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