MAX11359AETL Maxim Integrated, MAX11359AETL Datasheet - Page 39

• Manufacturer Part Number: MAX11359AETL
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX11359AETL

• Number Of Channels: 10
• Architecture: Sigma-Delta
• Conversion Rate: 10 SPs to 512 SPs
• Resolution: 16 bit
• Input Type: Differential
• Interface Type: 4-Wire Serial, Microwire, QSPI, SPI
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Power Dissipation: 2051.3 mW
• Number Of Converters: 1
• Voltage Reference: 1.251 V 1.996 V, 2.422 V

DACA_OP Register
Writing to the DACA_OP output register updates DACA
on the rising SCLK edge of the LSB data bit. The output
voltage can be calculated as follows:
where:
V
N is the integer value of the DACA<9:0> output regis-
ter. The output buffer is in unity gain.
The DACA data is 10 bits long and right justified.
The REF_SDC register contains bits to control the refer-
ence voltage and signal-detect comparator.
REFV<1:0>: Reference buffer voltage gain and enable
bits. Enables the output buffer, sets the gain and the
voltage at the REF pin as shown in Table 10. Power-on
state is off to enable an external reference to drive the
REF pin without contention.
AOFF: ADC and DAC/op-amp power-off bit. This bit pro-
vides a method for turning off several analog functions
with a single write. Setting AOFF = 1 deasserts the
ADCE in the ADC register and DAE/OP3E, OP2E, and
OP1E bits in the DACA_OP registers, powering down
these analog blocks. Setting AOFF = 0 has no effect.
The AON bit has priority when both AON and AOFF bits
are asserted.
DACA_OP Register (Power-On State: 000X XX00 0000 0000)
REF_SDC Register (Power-On State: 0000 0000)
Maxim Integrated
REF
UPIOs, RTC, Voltage Monitors, and Temp Sensor
DACA7
REFV1
16-Bit Data-Acquisition System with ADC, DAC,
MSB
DAE
MSB
is the reference voltage for the DAC.
V
DACA6
OUTA
REFV0
DBE
= V
REF
x N/2
DACA5
OP1E
AOFF
10
DACA4
AON
X
DAE: DACA enable bit. Set DAE = 1 to power up the
DACA and the DACA output buffer in the MAX11359A.
OP2E: OP2 power-enable bit. Set OP2E = 1 to power
up OP2 in the MAX11359A.
OP1E: OP1 power-enable bit. Set OP1E = 1 to power
up OP1 in the MAX11359A. This bit is mirrored in the
DACB_OP register.
DACA<9:0>: DACA data bits.
Most of the analog functions can be disabled with a
single write to the REF_SDC register by using AOFF,
REFV<1:0>, and SDCE.
Table 10. Setting the Reference Output
Voltage
DACA3
SDCE
BUFFER GAIN
REFERENCE
X
Disabled
1.638
(V/V)
1.0
2.0
DACA2
TSEL2
X
VOLTAGE (V)
REF OUTPUT
Impedance
Off (High
at REF)
1.251
1.996
2.422
MAX11359A
DACA9
DACA1
TSEL1
REFV1
0
0
1
1
DACA8
DACA0
TSEL0
LSB
LSB
REFV0
0
1
0
1
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