tsl238 TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS, tsl238 Datasheet - Page 2

• Manufacturer Part Number: tsl238
• Description: High-sensitivity Light-to-frequency Converter
• Manufacturer: TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS

TSL238
HIGH-SENSITIVITY
LIGHT-TO-FREQUENCY CONVERTER
TAOS073F − OCTOBER 2007
Terminal Functions
Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)
†
NOTES: 1. All voltage values are with respect to GND.
Recommended Operating Conditions
Electrical Characteristics at V
NOTES: 1. The input irradiance is supplied with green LED light source with peak wavelength = 524 nm.
2
Copyright E 2007, TAOS Inc.
GND
NC
NC
OE
OUT
V
Supply voltage, V
High-level input voltage, V
Low-level input voltage, V
Operating free-air temperature range, T
V
V
I
I
I
k
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
IH
IH
DD
SVS
DD
OH
OL
NAME
TERMINAL
Supply voltage, V
Input voltage range, V
Output current, I
Short circuit of output to ground duration
Operating free-air temperature range, T
Storage temperature range, T
Solder conditions in accordance with JEDEC J−STD−020A, maximum temperature (see Note 2)
2. The device may be hand soldered provided that heat is applied only to the solder pad and no contact is made between the tip of
2. Full-scale frequency is the maximum frequency of the device without saturation. Higher irradiance will not result in any additional
3. Measured at wafer probe using 50°C hot chuck.
High-level output voltage
Low-level output voltage
High-level input current
Low-level input current
Supply current
Full-scale frequency (Note 2)
Temperature coefficient of output frequency
Supply-voltage sensitivity
1, 2, 3
the solder iron and the device lead. The maximum time heat should be applied to the device is 5 seconds.
increase of output frequency. The output frequency will remain at approximately the saturation frequency to a minimum of 1000
μW/sqcm 524-nm irradiance. During production testing, devices are not tested at this very high irradiance level.
D PKG
NO.
DD
6
4
5
8
7
PARAMETER
TYPE
O
IL
IH
DD
O
I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(see Note 1)
I
Power supply ground. All voltages are referenced to GND.
No connection.
Substrate. Pin 4 is resistively connected to the substrate of the die, which is at the same potential as pin 6.
Pin 4 must either be connected to pin 6 or left unconnected. Pin 4 cannot be used for a ground connection
by itself.
Enable for f
Output frequency.
Supply voltage.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A
stg
DD
O
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
= 5 V, T
(active low).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
r
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
www.taosinc.com
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
= 25°C (Note 1) (unless otherwise noted)
I
I
E
T
Wavelength < 700nm, f
V
OH
OL
A
e
DD
= 50°C (Note 3)
= 21.2 μW/cm
= 1 mA
= − 1 mA
= 5 V ±10%
TEST CONDITIONS
DESCRIPTION
2
O
= 50 kHz
r
0.8
×
MIN
V
−25
2.7
DD
0
MIN
−10
−10
500
The LUMENOLOGY r Company
NOM
4
5
± 200
−0.3 V to V
TYP
0.25
± 0.5
4.5
2
MAX
−25°C to 70°C
−40°C to 85°C
MAX
1000
V
5.5
0.5
0.4
DD
70
10
10
3
. . .
DD
ppm/°C
± 5 mA
UNIT
UNIT
+0.3 V
%/ V
kHz
260°C
mA
μA
μA
°C
V
V
V
V
V
6 V
5 s
†