The SPD6524Q is a Geiger-mode InGaAs avalanche photodiode (APD) module with Dual-Channel. Operating wavelength 0.95μm ~ 1.65μm; Specifically designed for single-photon detection applications; Internally integrated with a three-stage cooler; Butterfly hermetically sealed dual-channel module with pigtail.
Product model
| Dual-Channel InGaAs SPAD Detector Module |
SPD6524Q-SM-FC/UPC(1.0m) | Operating wavelength 950nm ~ 1650nm; Material InGaAs, Responsivity 8A/W@1550nm,Butterfly hermetically sealed dual-channel module with pigtail | Response wavelength: 950-1650nm Material: InGaAs |
Parameter
Features
● Operating wavelength: 0.95μm ~ 1.65μm;
● Specifically designed for single-photon detection applications;
● Internally integrated with a three-stage cooler;
● Butterfly hermetically sealed dual-channel module with pigtail.
Key Parameter
Main Optoelectronic Indicators
1. Linear mode parameters
Parameters | Test conditions（unless otherwise specified，TC =25±5℃) | Min | Max | Unit |
Effective detection surface diameter | — | 25 | — | μm |
Spectral response range | — | 950 | 1650 | nm |
Reverse breakdown voltage VBR | IR=10 μA ，Φe=0 | 60 | 85 | V |
Responsivity Re | Φe=1μW，VR=(VBR-1)V, λ=1550 nm±50 nm | 8 |
| A/W |
Dark current ID | VDC =(VBR-1) V，Φe=0 |
| 1 | nA |
Capacitance Ctot | VDC =(VBR-1) V，f=1MHz | — | 0.2 | pF |
Breakdown voltage temperature coefficient η | TC =-45～+30℃ , IR =10μA，φe=0 | 0.10 | 0.2 | V/℃ |
2. Geiger Mode Parameters
Parameters | Test Conditions | Min | Max | Unit |
Single photon detection efficiency PDE | TA = -30±5℃, μ=1, fg = 100 MHz, fP = 500 kHz, DCR ≤ 5.0 kHz ，λ = 1.55μm | 10 |
| % |
Dark count rate DCR | TA = -30±5℃, fg = 100 MHz， SPDE = 10%±0.5 % ，λ = 1.55μm |
| 2.5 | kHz |
After pulse probability APP (1000 ns) | TA = -30±5℃, μ=1, fg = 100 MHz, fP = 500 kHz, SPDE = 10%±0.5 % ，λ = 1.55μm |
| 3 | %
|
Time jitter TJ | SPDE=10% |
| 500 | ps |
Note: λ is the incident light wavelength, Tₐ is the test temperature value, μ is the average number of photons per pulse, fg is the gating signal frequency, and fₚ is the optical pulse signal frequency.
Absolute Maximum Ratings and Recommended Operating Conditions
Item | Parameter | Rating |
Absolute Maximum Ratings | 1 | Storage temperatureTSTG | -50℃~+85℃ |
2 | Operating environment temperatureTC | -50℃~60℃ |
3 | Soldering temperatureTsld（time） | 260℃（10s） |
4 | Reverse DC bias voltage VDC | VBR+5 V |
5 | Input optical powerφe（continuous） | 1 mW |
6 | Forward currentIF（continuous） | 200 μA |
7 | Electrostatic discharge sensitivityESD | ≥300 V |
8 | Pigtail pulling force | 3.0 N |
9 | TEC voltage | 11.9 V |
10 | TEC current | 0.8 A |
Item | Parameter | Rating |
|
Recommended Operating Conditions | 1 | APD chip operating temperatureTth | -50℃~-30℃ |
|
| 2 | Reverse DC bias voltageVDC | VBR+1V～VBR+5V |
|
Typical characteristic curve
Figure 1 Photocurrent and dark current curves
Figure 2 Breakdown voltage temperature coefficient
Dimensions and Pin definitions
Package Outline
Dimensions
Symbol | Min |
| Max | Symbol | Min |
| Max | Symbol | Min |
| Max |
H1 | 6.5 | - | 7.0 | L2 | 10.0 | - | 30.0 | L8 | 8.8 | - | 9.2 |
H2 | 1.8 | - | 2.2 | L3 | 3.8 | - | 4.2 | L9 | 12.5 | - | 13.5 |
H3 | 6.5 | - | 7.0 | L4 | 3.0 | - | 3.3 | L10 | 28.5 | - | 30.5 |
H4 | 9.0 | - | 10.5 | L5 | 29.2 | - | 29.8 | ф 1 | 3.0 | - | 6.6 |
L0 | 1000.0 | - | - | L6 | 24.5 | - | 25.5 | ф2 | 0.35 | - | 0.50 |
L1 | 21.2 | - | 21.8 | L7 | - | 2.54 | - | ф3 | 2.2 | - | 2.6 |
Equivalent Circuit and Pin Definitions
Pin# | Function | Pin# | Function |
1 | Reserved | 8 | Reserved |
2 | Reserved | 9 | Reserved |
3 | Diode I (N) | 10 | Diode II (N) |
4 | Diode I Signal Out (Vout) | 11 | Diode II Signal Out (Vout) |
5 | Diode I (P) | 12 | Diode II (P) |
6 | Thermistor (Rth) | 13 | Thermistor (Rth) |
7 | TEC+ | 14 | TEC- |
TEC\NTC Electrical parameters
NTC (Thermistor): RT=10 kΩ @ 25℃, β=3450,5%.
TEC (Thermoelectric Cooler): IMAX=0.8 A, VMAX=11.9 V, THMAX=200℃
Ordering Info
SPD6524Q-XX-XX/XXX(XXX)
XX:Fiber Type
SM
XX/XXX:Fiber Connector
XX: FC
SC
LC
NC
XXX:
UPC
APC
(XXX):Fiber Length
1.0m
1.5m
Note:
● The product is an electrostatic sensitive device, and ESD protection must be taken during storage and use.
● The bending radius of the product fiber is not less than 30mm. Avoid fiber breakage and contamination or damage to the connector during storage and use.
● The product requires external refrigeration. The clamping carrier used for refrigeration needs to be made of a material with good thermal conductivity, keep the cavity wall at one end of the device lead and the contact surface of the clamping carrier tightly matched, and apply thermal conductive material on the contact surface of the two.
● The product should be stored in a clean environment with ventilation and no corrosive gas at a temperature of -10~+40℃ and a relative humidity of no more than 80%.
Product model
SPD6524Q-SM-FC/UPC(1.0m)Response wavelength: 950-1650nm
Material: InGaAs
Parameter
● Operating wavelength: 0.95μm ~ 1.65μm;
● Specifically designed for single-photon detection applications;
● Internally integrated with a three-stage cooler;
● Butterfly hermetically sealed dual-channel module with pigtail.
Main Optoelectronic Indicators
1. Linear mode parameters
Parameters
Test conditions（unless otherwise specified，TC =25±5℃)
Min
Max
Unit
Effective detection surface diameter
—
25
—
μm
Spectral response range
—
950
1650
nm
Reverse breakdown voltage VBR
IR=10 μA ，Φe=0
60
85
V
Responsivity Re
Φe=1μW，VR=(VBR-1)V, λ=1550 nm±50 nm
8
A/W
Dark current ID
VDC =(VBR-1) V，Φe=0
1
nA
Capacitance Ctot
VDC =(VBR-1) V，f=1MHz
—
0.2
pF
Breakdown voltage temperature coefficient η
TC =-45～+30℃ , IR =10μA，φe=0
0.10
0.2
V/℃
2. Geiger Mode Parameters
Parameters
Test Conditions
Min
Max
Unit
Single photon detection efficiency PDE
TA = -30±5℃, μ=1, fg = 100 MHz, fP = 500 kHz, DCR ≤ 5.0 kHz ，λ = 1.55μm
10
%
Dark count rate DCR
TA = -30±5℃, fg = 100 MHz，
SPDE = 10%±0.5 % ，λ = 1.55μm
2.5
kHz
After pulse probability APP (1000 ns)
TA = -30±5℃, μ=1, fg = 100 MHz, fP = 500 kHz, SPDE = 10%±0.5 % ，λ = 1.55μm
3
%
Time jitter TJ
SPDE=10%
500
ps
Note: λ is the incident light wavelength, Tₐ is the test temperature value, μ is the average number of photons per pulse, fg is the gating signal frequency, and fₚ is the optical pulse signal frequency.
Absolute Maximum Ratings and Recommended Operating Conditions
Item
Parameter
Rating
Absolute Maximum Ratings
1
Storage temperatureTSTG
-50℃~+85℃
2
Operating environment temperatureTC
-50℃~60℃
3
Soldering temperatureTsld（time）
260℃（10s）
4
Reverse DC bias voltage VDC
VBR+5 V
5
Input optical powerφe（continuous）
1 mW
6
Forward currentIF（continuous）
200 μA
7
Electrostatic discharge sensitivityESD
≥300 V
8
Pigtail pulling force
3.0 N
9
TEC voltage
11.9 V
10
TEC current
0.8 A
Item
Parameter
Rating
Recommended Operating Conditions
1
APD chip operating temperatureTth
-50℃~-30℃
2
Reverse DC bias voltageVDC
VBR+1V～VBR+5V
Typical characteristic curve
Figure 1 Photocurrent and dark current curves
Figure 2 Breakdown voltage temperature coefficient
Package Outline
Dimensions
Symbol
Min
Max
Symbol
Min
Max
Symbol
Min
Max
H1
6.5
-
7.0
L2
10.0
-
30.0
L8
8.8
-
9.2
H2
1.8
-
2.2
L3
3.8
-
4.2
L9
12.5
-
13.5
H3
6.5
-
7.0
L4
3.0
-
3.3
L10
28.5
-
30.5
H4
9.0
-
10.5
L5
29.2
-
29.8
ф 1
3.0
-
6.6
L0
1000.0
-
-
L6
24.5
-
25.5
ф2
0.35
-
0.50
L1
21.2
-
21.8
L7
-
2.54
-
ф3
2.2
-
2.6
Equivalent Circuit and Pin Definitions
Pin#
Function
Pin#
Function
1
Reserved
8
Reserved
2
Reserved
9
Reserved
3
Diode I (N)
10
Diode II (N)
4
Diode I Signal Out (Vout)
11
Diode II Signal Out (Vout)
5
Diode I (P)
12
Diode II (P)
6
Thermistor (Rth)
13
Thermistor (Rth)
7
TEC+
14
TEC-
TEC\NTC Electrical parameters
NTC (Thermistor): RT=10 kΩ @ 25℃, β=3450,5%.
TEC (Thermoelectric Cooler): IMAX=0.8 A, VMAX=11.9 V, THMAX=200℃
SPD6524Q-XX-XX/XXX(XXX)
XX:Fiber Type
SM
XX/XXX:Fiber Connector
XX: FC
SC
LC
NC
XXX:
UPC
APC
(XXX):Fiber Length
1.0m
1.5m
Note:
● The product is an electrostatic sensitive device, and ESD protection must be taken during storage and use.
● The bending radius of the product fiber is not less than 30mm. Avoid fiber breakage and contamination or damage to the connector during storage and use.
● The product requires external refrigeration. The clamping carrier used for refrigeration needs to be made of a material with good thermal conductivity, keep the cavity wall at one end of the device lead and the contact surface of the clamping carrier tightly matched, and apply thermal conductive material on the contact surface of the two.
● The product should be stored in a clean environment with ventilation and no corrosive gas at a temperature of -10~+40℃ and a relative humidity of no more than 80%.