MAX1108EUB+ Maxim Integrated Products, MAX1108EUB+ Datasheet - Page 15

• Manufacturer Part Number: MAX1108EUB+
• Description: IC ADC 8BIT LP 10-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX1108EUB+

• Number Of Bits: 8
• Sampling Rate (per Second): 50k
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 1
• Power Dissipation (max): 444mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Number Of Adc Inputs: 2
• Architecture: SAR
• Conversion Rate: 50 KSPs
• Resolution: 8 bit
• Interface Type: Serial
• Voltage Reference: Internal 2.048 V or External
• Supply Voltage (max): 3.3 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CS does not need to be held low once a conversion is
started. Pulling CS high prevents data from being
clocked into the MAX1108/MAX1109 and three-states
DOUT, but it does not adversely affect an internal
clock-mode conversion already in progress. In this
mode, data can be shifted in and out of the
MAX1108/MAX1109 at clock rates up to 2MHz, provid-
ed that the minimum acquisition time (t
above 1µs.
Figure 8. Single Conversion Timing, Internal Clock Mode
Figure 9. Quick-Look Schematic
*CONVERSION RESULT = 10101010
ANALOG
INPUT
DOUT
SCLK
DIN
A/D STATE
CS
0.01µF
C1
1µF
______________________________________________________________________________________
START
1
IDLE
CH0
COM
REF
SEL2
SEL0
MAX1108
MAX1109
SEL1
4
I/EREF I/ECLK
DOUT
SCLK
t
GND
ACQ
V
DIN
CS
DD
ACQ
SHDN
REF
SHDN
) is kept
2-Channel, Serial 8-Bit ADCs
8
0.1µF
35 s MAX
Single-Supply, Low-Power,
t
CONV
V
DD
To quickly evaluate the MAX1108/MAX1109’s analog
performance, use the circuit of Figure 9. The device
requires a control byte to be written to DIN before each
conversion. Tying CS to GND and DIN to V
control bytes of FFH. In turn, this triggers single-ended,
unipolar conversions on CH0 in relation to COM in
external clock mode without powering down between
conversions. Apply an external 50kHz to 500kHz clock
D7
1µF
OSCILLATOR
D6
500kHz
V
10
SUPPLY
D5
D4
D3
CH1
D2
14
D1
OSCILLOSCOPE
D0
MSB
5 s/div
IDLE
CH2
LSB
18
Quick Look
DD
feeds in
DOUT*
SCLK
15