MAX11200EEE+T Maxim Integrated, MAX11200EEE+T Datasheet - Page 13

• Manufacturer Part Number: MAX11200EEE+T
• Description: Analog to Digital Converters - ADC 24-Bit Delta-Sigma
• Manufacturer: Maxim Integrated

Specifications of MAX11200EEE+T

• Rohs: yes
• Number Of Channels: 1
• Architecture: Sigma-Delta
• Resolution: 24 bit
• Input Type: Single-Ended
• Interface Type: SPI
• Operating Supply Voltage: 1.7 V to 3.6 V, 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QSOP-16
• Maximum Power Dissipation: 667 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 3.6 V

Figure 3. MAX11200 GPIOs Drive an External 4-Channel
Switch (MAX313)
Table 4c. Data Command to Select Channel AIN3 in Figure 3
Figure 4. MAX11210 Digital Programmable Gain Example (1sps Output Rate)
Maxim Integrated
BIT
BIT NAME
VALUE
24-BIT OUTPUT DATA CYCLE
MSB
AIN1
AIN2
AIN3
AIN4
LOGIC
0
1
MAX313
MAX313
24-Bit, Single-Channel, Ultra-Low-Power,
SWITCH
OFF
ON
COM1
COM2
COM3
COM4
DIR4
B7
IN1
IN2
IN3
IN4
1
DIR3
B6
GPIO1
GPIO2
GPIO3
GPIO4
AINP
AINN
1
MAX11200
BITS USED FOR GAIN = 1
BIPOLAR RANGE
DIR2
Delta-Sigma ADCs with GPIO
V
B5
V
LSB
BITS USED FOR GAIN = 2
1
REF
= 429nV,
= 3.6V,
DIR1
BITS USED FOR GAIN = 16
B4
1
This selects all GPIO as outputs, as well as setting all
logic signals to 0 except the selected channel AIN1. To
select channel AIN3 next, it is best to set all switches to
a high-impedance state first (see Table 4b).
Then select channel AIN3 by driving IN3 high (see
Table 4c).
It is not always necessary to transition to a high-imped-
ance state between channel selections, but depends on
the source analog signals as well as the control structure
of the multiplexed switches.
The MAX11210 offers programmable gain settings that
can be digitally set to 1, 2, 4, 8, or 16. The DGAIN_ bits in
the CTRL3 register (Table 14) configure the digital gain
setting and control the input referred gain. See Figure 4.
The MAX11210’s input range is 0V to V
lar) or ±V
produces 32 bits of data, but only 24 bits of data are
used. For any given data rate, the noise floor remains
constant, independent of the digital gain setting. The
MAX11210 digital gain is beneficial for systems that can
afford averaging multiple readings for higher resolution.
MAX11200/MAX11210
Digital Programmable Gain (MAX11210)
REF
DIO4
B3
0
/gain (bipolar). The MAX11210 modulator
DIO3
B2
1
LSB
REMAINS CONSTANT
DIO2
B1
0
NOISE FLOOR
AT 0.21µV
REF
SUB-LSBs
RMS
/gain (unipo-
DIO1
B0
0
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