MAX1407 Datasheet, PDF (35/48 Pages) Maxim Integrated Products – Low-Power, 16-Bit Multichannel DAS with Internal Reference,10-Bit DACs, and RTC

Low-Power, 16-Bit Multichannel DAS with
Internal Reference,10-Bit DACs, and RTC
Table 8. Related Bit Values During Specified Mode
CIRCUIT BLOCK
32kHz Oscillator
RTC
Low V_DD Voltage
Monitor (2.7V)
RESET Voltage
Monitor (1.8V)
Reset Bit
Low V_DD Status Bit
Voltage-Monitor
Threshold Selection
BIT
CH
CH
LVDE
LSDE
RST
LVD
INITIAL POWER-UP
0 (oscillator is on)
0 (RTC is on)
1 (2.7V monitor is
on)
0 (1.8V monitor is
off)
1 (RESET asserted)
1 (low V_DD)
SLEEP
N/A
N/A
1 if VM = 0
0 if VM = 1
0 if VM = 0
1 if VM = 1
N/A
N/A
STANDBY
N/A
N/A
1
0 if VM = 0
1 if VM = 1
N/A
N/A
IDLE
N/A
N/A
1
0 if VM = 0
1 if VM = 1
N/A
N/A
RUN
N/A
N/A
1
0 if VM = 0
1 if VM = 1
N/A
N/A
WAKE-UP EVENT
N/A
N/A
1
N/A
N/A
N/A
VM
0 (select 2.7V)
N/A
N/A
N/A
N/A
N/A
Bias Circuit
BIASE
Biase = 1 (biase
circuit is on)
0
1
1
1
1
PLL
PLLE
1 (PLL is on)
0
1
1
1
1
PLL Output
PLLE 1 (FOUT is enabled)
0
1
1
1
1
SHDN Output
SHDE 1 (SHDN pin = high)
0
1
1
1
1
DAC1
DA1E
0
0
0
1
1
N/A
DAC2
ADC MUX
DA2E
0
MUX
0
0
0
1
1
N/A
0
0
1
1
N/A
Bandgap Reference REFE
0
0
0
1
1
N/A
Signal-Detect
Comparator
SDCE
0
0
0
1
1
N/A
ADC Buffers
BUFE
0
ADC
ADC
0
0
0
0
1
N/A
0
0
0
1
N/A
N/A: Programming the part into these modes would not alter the content of the corresponding bit.
Power-Control Registers
Table 8 shows the bit values of some key registers in
different power modes under various conditions. Use
this as a quick reference when programming the
MAX1407/MAX1408/MAX1409/MAX1414 family.
NAME
DEFAULT
FIRST BIT (MSB)
REFE
ADCE
0
0
BUFE
0
MUXE
0
DA1E
0
POWER1 REGISTER (11000)
(LSB)
DA2E
—
—
0
0
0
REFE: Internal Reference Power Enable. When REFE is
set to 1, the internal reference is powered up. When
REFE is set to 0, the internal reference is powered down
allowing an external reference to be connected to REF.
ADCE: ADC Power Enable. When ADCE is set to 1, the
ADC is powered up. When ADCE is set to 0, the ADC is
powered down.
BUFE: ADC Input Buffer Power Enable. A logic 1
enables the power-up of the ADC input buffers, while a
logic 0 powers-down the buffers.
MUXE: Multiplexer enable. A logic 0 disables the multi-
plexer outputs while a logic 1 enables them.
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