MAX11138ATI+ Maxim Integrated, MAX11138ATI+ Datasheet - Page 37

• 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

For devices using an external reference, the choice of the
reference determines the output accuracy of the ADC.
An ideal voltage reference provides a perfect initial accu-
racy and maintains the reference voltage indepen dent
of changes in load current, temperature, and time. The
following parameters need to be considered in selecting
a reference:
Figure 13. Typical Application Circuit
INPUT 1
INPUT 2
V
V
DC
DC
500I
500I
500ksps, Low-Power, Serial 12-/10-/8-Bit,
4
3
4
3
MAX4430
MAX4430
Choosing a Reference
5
2
5
2
0.1µF
0.1µF
100pF
100pF
500I
500I
+5V
+5V
0.1µF
0.1µF
1
1
-5V
-5V
10µF
10µF
10I
10I
10µF
10µF
CAPACITOR
CAPACITOR
0.1µF
COG
COG
V
DD
10µF
470pF
470pF
0.1µF
10µF
U Initial voltage accuracy
U Temperature drift
U Current source capability
U Current sink capability
U Quiescent current
U Noise
The MAX6033 and MAX6043 are also excellent reference
choices
INPUT 2
MAX11135–MAX11143
4-/8-/16-Channel ADCs
(Figure
7
6
4
3
V
AGND
AIN0
AIN1
AIN15
REF
OUTF
OUTS
GNDS
GND
DD
MAX11135–MAX11143
13).
MAX6126
GND
OVDD
DOUT
SCLK
DIN
CS
NR
IN
2
1
V
OVDD
SCLK
MISO
SS
MOSI
0.1µF
1µF
0.1µF
CPU
+5V
10µF
0.1µF
37