MAX11138ATI+ Maxim Integrated, MAX11138ATI+ Datasheet - Page 23

• Manufacturer Part Number: MAX11138ATI+
• Description: Analog to Digital Converters - ADC 500ksps, Low-Power, Serial 12-/10-/8-Bit
• Manufacturer: Maxim Integrated

Specifications of MAX11138ATI+

• Rohs: yes
• Number Of Channels: 4/2
• Architecture: SAR
• Conversion Rate: 500 kSPs
• Resolution: 10 bit
• Input Type: Single-Ended/Differential
• Snr: 61.7 dB
• Interface Type: 3-Wire, QSPI, SPI
• Operating Supply Voltage: 2.35 V to 3.6 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Package / Case: TQFN-28
• Maximum Power Dissipation: 2758 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 1 V

into ADC memory, the pattern may be repeated indefi-
nitely or changed at any time.
For example, the maximum throughput of MAX11135–
MAX11143 is 500ksps. Traditional ADC scan modes
allow up to 16-channel conversions in ascending order.
In this case, the effective throughput per channel is
500ksps/16 channel or 31.25ksps. The maximum input
Figure 9. SampleSet Use-Model Example
ENTRY NO.:
CHANNEL:
100 CYCLES
10 CYCLES
1 CYCLES
100kHz
10kHz
1kHz
AIN2/
AIN3
1
AIN0
2
AIN1
3
AIN0
AIN1
CS
AIN0
2
4
120 CONVERSIONS:
t
S
1
(DEPTH = 256)
AIN0 AND AIN1
= 1/f
SAMPLE SET
T
T
1
3
S
S
ST
S
122
123
124
125
500ksps, Low-Power, Serial 12-/10-/8-Bit,
CYCLE
AIN1
4
= 1/500ksps = 2µs
135
5
5
f
in
6
256
= 100kHz
2
7
ND
POTENTIAL SampleSet PATTERN
8
CYCLE
9
AIN0
120
10
11
3
RD
12
AIN1
121
CYCLE
13
14
AIN2/
AIN3
122
15
4
TH
16
SampleSet REPEATS: LENGTH = 256
5µs
CYCLE
5µs
17
AIN4
123
18
19
5
20
TH
AIN5
124
21
CYCLE
22
AIN6
23
125
24
6
TH
25
CYCLE
AIN7
126
26
27
28
7
AIN8
127
TH
29
CYCLE
30
frequency that the ADC can resolve (Nyquist Theorem)
is 15.625kHz. If all 16 channels must be measured, with
some channels having greater than 15.625kHz input
frequency, the user must revert back to manual mode
requiring constant communication on the serial interface.
SampleSet technology solves this problem.
vides a SampleSet use-model example.
31
AIN9
128
32
10µs
10µs
8
TH
MAX11135–MAX11143
CYCLE
AIN10
4-/8-/16-Channel ADCs
129
AIN11
9
130
TH
CYCLE
AIN12
131
AIN13
132
AIN14
133
FULLY
DIFFERENTIAL
AIN15
134
ANALOG
INPUTS
AIN2/
AIN3
AIN0
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
AIN8
AIN9
AIN10
AIN11
AIN12
AIN13
135
AIN0
136
120 CONVERSIONS:
AIN1
AIN0 AND AIN1
137
Figure 9
AIN0
254
AIN1
255
pro-
AIN2/
AIN3
256
23