MAX1462 Datasheet, PDF (12/16 Pages) Maxim Integrated Products – Low-Voltage, Low-Power, 16-Bit Smart ADC

Low-Voltage, Low-Power,
16-Bit Smart ADC
Table 7. EEPROM Memory Map
EE Address (hex)
Contents
10 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01
MSB
Configuration
LSB
EE Address (hex)
Contents
20 1F 1E 1D 1C 1B 1A 19 18 17 16 15 14 13 12 11
MSB
Gain
LSB
EE Address (hex)
Contents
30 2F 2E 2D 2C 2B 2A 29 28 27 26 25 24 23 22 21
MSB
G₁
LSB
EE Address (hex)
Contents
40 3F 3E 3D 3C 3B 3A 39 38 37 36 35 34 33 32 31
MSB
G₂
LSB
EE Address (hex)
Contents
50 4F 4E 4D 4C 4B 4A 49 48 47 46 45 44 43 42 41
MSB
Of₀
LSB
EE Address (hex)
Contents
60 5F 5E 5D 5C 5B 5A 59 58 57 56 55 54 53 52 51
MSB
Of₁
LSB
EE Address (hex)
Contents
70 6F 6E 6D 6C 6B 6A 69 68 67 66 65 64 63 62 61
MSB
Of₂
LSB
EE Address (hex)
Contents
00 7F 7E 7D 7C 7B 7A 79 78 77 76 75 74 73 72 71
MSB
D_OFF
LSB
Table 8. Subset of DSP Instruction
INSTRUCTION
CODE (PS)
(HEX)
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
PROGRAM
COUNTER
(P)
(HEX)
66 or 6C
47
11
2E
38
03
22
56
01
3B
S REGISTER VALUE
Register 0—Configuration
Register 1—Gain
Register 2—G₁
Register 3—G₂
Register 4—Of₀
Register 5—Of₁
Register 6—Of₂
Register 7—D_OFF
Register 8—Temperature
Signal
Register 9—Sensor Signal
EA
65 or 6B
Register 10—Compensated
Output D
Equation (1)
D_L −
D_OFF =
Gain
_{1 +}
G₁T_C +
G₂T_C2




Signal_CL
+
Of₀
+
Of₁T_C
+
Of₂T_C2 ^
where D_L, D_S, and D_OFF are determined by the end
product specification. D_L is the desired MAX1462 out-
put corresponding to the L sensor excitation; D_S is the
desired MAX1462 output corresponding to the S sensor
excitation; D_OFF is the desired midscale output;
Signal_CL is the digitized sensor reading at temperature
C with the L sensor excitation applied; and T_C is the
digitized temperature reading at temperature C.
Unstable digitized temperature readings indicate that
thermal equilibrium has not been achieved, necessitat-
ing increased soak times or a better thermal control.
Averaging many readings from the MAX1462 will help
filter out AC variations in the sensor excitation and oven
temperature.
Begin calibration by soaking the sensor and the
MAX1462 pair at the first temperature, A, and apply the
L excitation to the sensor. Start a conversion and
record the digitized temperature T_A and the digitized
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