MAX17050EVKIT# Maxim Integrated, MAX17050EVKIT# Datasheet - Page 39

• Manufacturer Part Number: MAX17050EVKIT#
• Description: Power Management IC Development Tools MAX17050 Eval Kit
• Manufacturer: Maxim Integrated
• Type: Voltage Protectionr
• Series: MAX17047, MAX17050r

Specifications of MAX17050EVKIT#

• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: MAX17050
• Input Voltage: 2.5 V to 4.5 V
• Interface Type: I2C
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Part # Aliases: 90-BT07K#D00
• For Use With: MAX17050

Both these registers are signed two’s complement. The
default values of 4000h for CGAIN and 0000h for COFF
preserve factory calibration and unit values (1.5625FV).
Figure 55
shows the COFF register format.
While in active mode and Ten = 1 in the CONFIG register,
the device periodically measures the voltage between
the AIN and CSP pins and compares the result to the volt-
age of the THRM pin. The device stores the result, a ratio-
metric value from 0 to 100%. The resulting data is placed
in the AIN register every 1.4s with an LSb of 0.0122%.
Conversions are initiated by connecting the THRM and
VTT pins internally. This enables the active pullup to
the external voltage-divider network. After the pullup is
enabled, the device waits for a settling period of t
prior to making measurements on the AIN pin. When
ETHRM = 1, FTHRM = 0, the active pullup is disabled
Figure 55. CGAIN Register Format (Input)
Figure 56. COFF Register Format (Input)
Table 4. Recommended TGAIN and TOFF Register Values for Common NTC
Thermistors
Maxim Integrated
197-103LAG-A01
MSb
MSb
THERMISTOR
S
S
shows the CGAIN register format and
103AT-2
Semitec
Fenwal
Type F
TDK
Temperature Measurement
2
2
14
0
2
2
MSB—ADDRESS 2FH
MSB—ADDRESS 2Eh
13
-1
2
2
12
-2
R
25C
2
2
11
-3
10
10
10
(kI)
2
2
10
-4
2
2
-5
9
Figure 56
BETA
3435
3974
4550
LSb
LSb
2
2
PRE
-6
8
ModelGauge m3 Fuel Gauge
when temperature measurements are complete. This fea-
ture limits the time the external resistor-divider network
is active and lowers the total amount of energy used by
the system.
When Tex = 0 and Ten = 1 in the CONFIG register, the
device converts the AIN register to a temperature using
the temperature gain (TGAIN) and temperature offset
(TOFF) register values:
The resulting value is stored in the Temperature register
each time the AIN register is updated. Additionally, the
device maintains a record of the minimum and maximum
temperature measured by the device, and an average
temperature over a time period defined by the host.
Table 4
values for common NTC thermistors.
RECOMMENDED TGAIN
MSb
2
MSb
UNITS: 3.125FV/R
2
0
2
-7
7
UNITS: 0.0061%
TGAIN Register/16384) + (TOFF Register O 2)
MAX17047/MAX17050
lists the recommended TGAIN and TOFF register
Temperature Register = (AIN Register O
2
2
E71Ch
-8
E3E1h
E989h
6
2
2
LSB—ADDRESS 2Eh
LSB—ADDRESS 2Fh
-9
5
SENSE
2
2
-10
4
2
2
-11
3
RECOMMENDED TOFF
2
2
-12
2
290Eh
251Ah
22B1h
2
2
-13
1
LSb
LSb
2
2
-14
0
39