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www.1wire.org |
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Comparison Table of 1-Wire® Temperature and A/D
Converters |
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<back |
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NOTES |
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1. Accuracy is ±3% with no trimming, ±2% with trim at wafer, and ±0.5% if trimmed in an oil bath. |
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2. The DS2438 displays
the average of 32 conversions. |
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3. Voltage ADC only. The
number of conversion bits for the DS2450 is programmable. |
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4. TCONV and ICONV values for the DS2450 are estimates. The DS2450 displays a
single conversion. |
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5. TCONV and ICONV values for the DS1921 are estimates. |
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6. The number of conversion bits for the DS18B20 and DS1822 are
programmable. |
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7. TCONV times for the DS18B20
and DS1822 vary according to the number of conversion bits specified. |
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8. The DS2761 formats the
average of 128 readings every 88ms. |
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Note the differences in
accuracy along with the conversion times |
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Part Number [1] |
Description |
User Data Storage
(bytes) |
Parameters
Measured |
Other Features |
CONV. BITS |
ACCURACY 1 |
TCONV. ms |
ICONV. uA |
CONV. TYPE |
CHIP SIZE |
PROCESS |
Single Unit Price[2] |
Supply Voltage |
Parasite Power |
Package |
Intro Date |
Function |
Battery Type |
Battery
Protection |
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DS1820 |
Device has been
replaced by DS18S20 |
2 byte EEPROM |
Temperature |
Unique ID |
9 + |
±0.5°C |
500 |
1500 |
DUAL OSC |
164 x 113 |
1.2 mm |
NA |
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DS18S20 |
1-Wire
Digital Thermometer |
2
byte EEPROM |
Temperature |
Unique
ID |
9 |
±0.5°C |
750 |
1500 |
DVBE |
78
x 54 |
0.6
mm |
$2.57 |
3.0 to 5.5 |
Available |
3/TO-92,
8/SO.150 |
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DS18S20-PAR |
1-Wire
Digital Thermometer |
2
byte EEPROM |
Temperature |
Unique
ID |
9 |
±0.5°C |
750 |
1500 |
DVBE |
78
x 54 |
0.6
mm |
$2.57 |
3.0 to 5.5 |
Hard-wired |
3/TO-92 |
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DS18B20 |
High-Precision
1-Wire Digital Thermometer |
2
byte EEPROM |
Temperature |
Unique
ID |
9
– 12 6 |
±0.5°C |
94
– 750 7 |
1500 |
DVBE |
78
x 54 |
0.6
mm |
$2.57 |
3.0 to 5.5 |
Available |
3/TO-92,
8/µMAX (µSOP), 8/SO.150 |
5/4/01 |
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DS1821 |
Digital
Thermometer or Standalone Thermostat |
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Temperature |
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8 |
±1°C |
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$2.93 |
3.6-5.5 |
No |
3/PR35,
8/SO.208 |
4/9/01 |
Local
Sensor, Standalone Thermostat |
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DS1822 |
Econo
1-Wire Digital Thermometer |
2
byte EEPROM |
Temperature |
Unique
ID |
9
– 12 6 |
±2°C |
94
– 750 7 |
1500 |
DVBE |
78
x 54 |
0.6
mm |
$1.97 |
3.0 to 5.5 |
Available |
3/TO-92,
8/SO.150 |
5/4/01 |
Local Sensor |
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DS1822-PAR |
Econo
Parasite-Power Digital Thermometer |
2
byte EEPROM |
Temperature |
Unique
ID |
9
– 12 6 |
±2°C |
94
– 750 7 |
1500 |
DVBE |
78
x 54 |
0.6
mm |
$1.97 |
3.0 to 5.5 |
Hard-wired |
3/TO-92 |
5/4/01 |
Local Sensor |
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DS1921 |
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4K
bits EEPROM |
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13 |
±1°C |
70
5 |
300 |
DS |
174
x 140 |
0.6
mm |
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DS1921G-F5 |
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8 |
±1°C |
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$16.00 |
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DS1921H-F50 |
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$14.39 |
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DS1921Z-F50 |
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±1°C |
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$14.39 |
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DS1922L |
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8 or 11 |
±0.5°C |
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DS1922T-F5 |
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512
Bytes |
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RTC |
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DS2436 |
Battery
ID, Temperature and Voltage Monitor Chip |
32
EEPROM, 8 SRAM |
Temperature,
Voltage |
Unique
ID |
13 |
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$1.90 |
2.4-10 |
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3/TO-92,
8/SO.150 |
4/9/01 |
Status
Monitor |
1/2
Cell Li-Ion, 2-6 Cell NiMH |
- |
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DS2438 |
Battery
ID, Temerature, Voltage, Current Monitor with RTC |
40
EEPROM |
Current,
Temperature, Time, Voltage |
Digital
Current Accumulation |
13 |
±2°C |
10
2 |
100 |
CYCLIC |
126 x 74 |
0.6 mm |
$1.97 |
2.4-10 |
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8/SO.150 |
4/9/01 |
Status
Monitor |
1/2
Cell Li-Ion, 2-6 Cell NiMH |
- |
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DS2450 |
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N/A |
4
Channel Voltage |
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8
– 16 3 |
N/A |
0.3
4 |
500
(typ) 1440 |
CYCLIC |
107
x 102 |
0.6
mm |
$5.98 |
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8/TSSOP |
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DS2720 |
Addressable
Single-Cell Rechargeable Lithium Protection IC |
8
EEPROM |
- |
External
MOSFET Drivers |
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- |
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$1.46 |
2.5-5.5 |
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8/µMAX
(µSOP) |
7/26/02 |
Protector |
1
Cell Li-Ion |
Over-Current,
Over-Temperature, Over/Under Voltage |
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DS2740 |
High-Precision
Coulomb Counter |
- |
Current |
Digital
Current Accumulation |
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- |
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$1.48 |
2.7-5.5 |
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8/µMAX
(µSOP) |
3/21/03 |
Fuel
Gauge |
1
Cell Li-Ion, 3-Cell NiMH |
- |
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DS2751 |
1-Cell
Li-Ion or 3-Cell NiMH Fuel Gauge |
16
SRAM, 32 EEPROM |
Current,
Temperature, Voltage |
Digital
Current Accumulation |
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- |
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$2.38 |
2.5-5.5 |
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8/TSSOP |
4/23/03 |
Fuel
Gauge, Status Monitor |
1
Cell Li-Ion, 3-Cell NiMH |
- |
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DS2760 |
High
Precision Li-Ion Battery Monitor |
16
SRAM, 32 EEPROM |
Current,
Temperature, Voltage |
Digital
Current Accumulation, External MOSFET Drivers |
13 |
±3°C |
220 |
90 |
CYCLIC |
108 x 128 |
0.6 mm |
$3.17 |
2.5-5.5 |
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16/TSSOP,
FlipChip |
4/9/01 |
Fuel
Gauge, Protector, Status Monitor |
1
Cell Li-Ion |
Over-Current,
Over/Under Voltage |
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DS2761 |
High
Precision Li-Ion Battery Monitor and Protector |
16
SRAM, 32 EEPROM |
Current,
Temperature, Voltage |
Digital
Current Accumulation, External MOSFET Drivers |
13 |
±3°C |
I=88
8 V=3.4 |
90 |
CYCLIC |
108 x 128 |
0.6 mm |
$3.17 |
2.5-5.5 |
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16/TSSOP,
FlipChip |
7/19/02 |
Fuel
Gauge, Protector, Status Monitor |
1
Cell Li-Ion |
Over-Current,
Over/Under Voltage |
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DS2762 |
Battery
Monitor and Protector |
16
SRAM, 32 EEPROM |
Current,
Temperature, Voltage |
Accumulated
Current & Temperature Alerts, Digital Current Accumulation, External
MOSFET Drivers |
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- |
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$3.32 |
2.5-5.5 |
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16/TSSOP,
FlipChip |
7/23/03 |
Fuel
Gauge, Protector, Status Monitor |
1
Cell Li-Ion |
Over-Current,
Over/Under Voltage |
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DS2770 |
Battery
Monitor and Charge Controller |
16
SRAM, 40 EEPROM |
Current,
Temperature, Voltage |
Digital
Current Accumulation, Li-Ion/NiMH Charge Controller |
13 |
±3°C |
I=3520
V=55 |
80 |
CYCLIC |
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0.6 mm |
$4.15 |
2.7-5.5 |
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16/TSSOP |
2/22/02 |
Fuel
Gauge, Status Monitor |
1
Cell Li-Ion, 3-Cell NiMH |
- |
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1-Wire is a registered
trademark of Dallas Semiconductor |
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Color Indicator |
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Temperature Sensor |
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Data Logger |
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General Purpose A/D |
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Battery Monitor |
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