MAX1462 查看數據表（PDF） - Maxim Integrated
零件编号
产品描述 (功能)
生产厂家
MAX1462 Datasheet PDF : 16 Pages
| |||
Low-Voltage, Low-Power,
16-Bit Smart ADC
MIN
16 CLK
CYCLES
00 01 02 03 29 30 31 00 01 02 03 29 30 31 00 01 02 03 29 30 31 00 01 02 03 29 30 31
XIN
TEST
RESET
SDIO
D0 D1 D2 D3 C3 NU NU D0 D1 D2 D3 C3 NU NU D0 D1 D2 D3 C3 NU NU D0 D1 D2 D3 C3 NU NU
COMMAND 1
COMMAND 2
COMMAND 3
COMMAND n
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 E0 E1 E2 E3 E4 E5 E6 R0 R1 R2 C0 C1 C2 C3 NU NU
LSB
REGISTER DATA FIELD
MSB LSB EEPROM ADDRESS
FIELD
MSB
LSB REG.MSB
ADD
LSB
MSB
COMMAND
NOTE: ALL TRANSITIONS MUST OCCUR WITHIN 100ns OF THE XIN CLOCK EDGE.
Figure 3. Test-System Command Timing Diagram
Table 3. TSO Settings
TSO
SETTING
TSO-2
TSO-1
TSO-0
0
0
0
0
1
0
0
1
2
0
1
0
3
0
1
1
4
1
0
0
5
1
0
1
6
1
1
0
7
1
1
1
TEMPERATURE
BRIDGE
OFFSET
Maximum
—
—
—
—
—
—
Minimum
hex). Fractional coefficient values range from -1.0
(8000 hex) to +0.99997 (7FFF hex).
The register at address 0 is called the Configuration
Register. It holds the CO, PGA gain, Op Amp Power-
Down, temperature-sensor offset, repeat mode, and
reserved bits, as shown in Table 6. The functionality of
the CO, PGA gain, and temperature-sensor bits is
described in the Analog Front End, Including PGA, CO-
DAC, ADC, and Temperature Sensor section.
The Op Amp Power-Down bit enables the uncommitted
op amp when set. The repeat-mode bit is tested by the
last instruction of the DSP microcode, and, if set, imme-
diately initiates another conversion cycle. The Maxim
reserved bits should not be altered.
Writing to the Internal EEPROM
The test system writes to the EEPROM with commands
4 hex (Block-Erase the entire EEPROM), 2 hex (Write 1
to a single EEPROM bit), and 0 hex (NOOP). The mini-
mum VDD required for all EEPROM write operations is
4.75V. During normal operation (when the TEST pin is
low) or when the test system issues instructions A hex
or E hex (Start Conversion from EEPROM values), the
DSP reads the Calibration Coefficients from the EEPROM.
In the normal production flow, determine the calibration
coefficients using direct register access. Then load the
calibration coefficients into the EEPROM with tester
instruction 2 hex. Instruction 4 hex block-erases the
EEPROM and is necessary only for a rework or reclaim
operation. For each part, the Maxim reserved bits in the
Configuration Register should be read before instruc-
tion 4 hex is issued, and restored afterwards. The
MAX1462 is shipped with its internal EEPROM uninitial-
ized, except for the reserved bits.
_______________________________________________________________________________________ 9
Share Link: 