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PDF SE95 Data sheet ( Hoja de datos )
| Número de pieza | SE95 | |
| Descripción | Ultra high accuracy digital temperature sensor and thermal WatchdogE | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SE95 (archivo pdf) en la parte inferior de esta página. Total 20 Páginas | ||
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INTEGRATED CIRCUITS
SE95
Ultra high accuracy digital temperature
sensor and thermal Watchdog™
Product data sheet
Supersedes data of 2004 Oct 05
2004 Dec 21
Philips
Semiconductors
1 page  
Philips Semiconductors
Ultra high accuracy digital temperature sensor and
thermal Watchdog™
Product data sheet
SE95
DC ELECTRICAL CHARACTERISTICS
VCC = 2.8 V to 5.5 V, Tamb = –55 °C to +125 °C unless otherwise noted.
SYM
PARAMETER
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TACC Temperature accuracy (Note 1)
VCC = 2.8 V to 3.6 V
CONDITIONS
Tamb = –25 °C to +100 °C
Tamb = –55 °C to +125 °C
Temperature accuracy (Note 1)
VCC = 3.6 V to 5.5 V
Tamb = –25 °C to +100 °C
Tamb = –55 °C to +125 °C
TRES Temperature resolution
11-bit digital temp data
TCON
IDD
Temperature conversion time
Supply quiescent current
Normal mode
Normal mode: I2C inactive
Normal mode: I2C active
Shut-down mode
VIH
VIL
VIHYS
HIGH-level input voltage
LOW-level input voltage
Input voltage hysteresis
Digital pins (SCL, SDA, A2–A0)
Digital pins
SCL and SDA pins
A2 to A0 pins
IIH HIGH–level input current
IIL LOW-level input current
VOL LOW-level output voltage
ILO
POR
Output leakage current
Power-on reset
Digital pins; VIN = VCC
Digital pins; VIN = 0 V
SDA and OS pins; IOL = 3 mA
IOL = 4 mA
SDA and OS pins; VOH = VCC
VCC supply below which the logic
is reset
OSQ OS fault queue
Programmable
Tos Overtemp shutdown
Default value
Sampling rate
Programmable
Thyst Hysteresis
Default value
CIN Input capacitance
Digital pins
NOTE:
1. Assumes a minimum 11-bit temperature reading.
2. Typical values are at VCC = 3.3 V and Tamb = 25 °C.
3. Conv: device A-to-D conversion.
MIN.
–1.0
–2.0
–2
–3
–
–
–
–
–
0.7 × VCC
–0.3
–
–
–1.0
–1.0
–
–
–
1.0
1
–
0.125
–
–
TYP.2
–
–
–
–
0.125
33
150
–
7.5
–
–
300
300
–
–
–
–
–
–
–
80
10
75
20
MAX.
+1.0
+2.0
+2
+3
–
–
–
1.0
–
VCC + 0.3
0.3 × VCC
–
–
1.0
1.0
0.4
0.8
10
2.5
UNIT
°C
°C
°C
°C
°C
ms
µA
mA
µA
V
V
mV
mV
µA
µA
V
V
µA
V
6 Conv 3
– °C
30 sample/s
– °C
– pF
2004 Dec 21
5
5 Page 
Philips Semiconductors
Ultra high accuracy digital temperature sensor and
thermal Watchdog™
Product data sheet
SE95
Configuration register
The Configuration register is a write/read register and contains an 8-bit non-complement data byte that is used to configure the device for
different operating conditions. The Configuration register table (Table 3) shows the bit assignments of this register.
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Table 3. Configuration register table
Bit Name
R/W POR Description
B7 Reserved
R/W 0
Reserved for manufacturer’s use.
B6–B5 Rate val
R/W 00
Sets the conversion rate:
00 = 10 conversions/sec (default)
01 = 0.125 conversions/sec
10 = 1 conversions/sec
11 = 30 conversions/sec
B4–B3 OS Fault queue
R/W 0
For OS Fault Queue programming.
Programmable queue data = 0, 1 ,2, 3 for queue value = 1, 2, 4, 6 respectively. Default = 0.
B2 OS Polarity
R/W 0
For OS Polarity selection.
1 = OS active HIGH, 0 = OS active LOW (default).
B1 OS Comp/Interrupt R/W 0 For OS operation Mode selection.
1 = OS interrupt, 0 = OS comparator (default).
B0 Shut-down
R/W 0
For Device Operation Mode selection.
1 = Shut-down, 0 = Normal (default).
Temperature Register (Temp)
The Temp register holds the digital result of temperature measurement or monitor at the end each A-to-D conversion. This register is read only
and contains two 8-bit data bytes consisting of one most significant (MS) data byte and one least significant (LS) data byte. However, only 13
bits of those two bytes are used to store the Temp data in 2’s complement format with the resolution of 0.03125 °C. The Temp register table
(Table 4) shows the bit arrangement of the Temp data in the data bytes.
Table 4. Temp Register table
Temp MS byte
MSB
B7 B6 B5 B4 B3 B2
for 11-bit Temp Data
MSB
D10 D9 D8 D7 D6 D5
for 13-bit Temp Data
MSB
D12 D11 D10 D9 D8 D7
Temp LS byte
LSB MSB
B1 B0 B7 B6 B5 B4 B3 B2
Not used
LSB
D4 D3 D2 D1 D0
X
X
X
Not used
LSB
D6 D5 D4 D3 D2 D1 D0
X
LSB
B1 B0
XX
XX
When reading the Temp register, all 16 bits of the two data bytes (MS byte and LS byte) must be collected and then the 2’s complement data
value according to the desired resolution must be selected for the temperature calculation. The Table 4 has shown the examples for two cases:
11-bit 2’s complement data value, and 13-bit 2’s complement data value. When converting into the temperature the proper resolution must be
used as listed in Table 5 using either one of these two formulae:
1. If the Temp Data MSB = 0, then: Temp Value (°C) = +(Temp Data) × Value Resolution
2. If the Temp Data MSB = 1, then: Temp Value (°C) = –(2’s complement Temp Data) × Value Resolution
Table 6 shows some examples of the results for the 11-bit calculations.
Table 5. Temp Data and Temp Value resolution
Data resolution
8 bits
9 bits
10 bits
11 bits
12 bits
13 bits
Value resolution
1.0 °C
0.5 °C
0.25 °C
0.125 °C
0.0625 °C
0.03125 °C
2004 Dec 21
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet SE95.PDF ] | |
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