MAX1109EUB Maxim Integrated, MAX1109EUB Datasheet - Page 9

• Manufacturer Part Number: MAX1109EUB
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1109EUB

• Number Of Channels: 2
• Architecture: SAR
• Conversion Rate: 50 KSPS
• Resolution: 8 bit
• Input Type: Single-Ended/Pseudo-Differential
• Snr: Yes
• Interface Type: 4-Wire (SPI, Microwire), QSPI
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: uMAX-10
• Maximum Power Dissipation: 444 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

(V
REF; T
DD
PIN
2, 3
-0.1
-0.2
-0.3
-0.4
-0.5
10
0.3
0.2
0.1
0.5
0.4
1
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
25
15
0
= +3.0V (MAX1108), V
A
-40
0
= +25°C; unless otherwise noted.)
CONVERSION TIME vs. TEMPERATURE
INTERNAL CONVERSION MODE
CH0, CH1
-20
NAME
DOUT
50
SCLK
COM
GND
INTEGRAL NONLINEARITY
V
REF
DIN
CS
DD
0
100
TEMPERATURE (°C)
DIGITAL CODE
_______________________________________________________________________________________
vs. CODE
V
20
DD
150
= 3V
Positive Supply Voltage
Sampling Analog Inputs
Ground
Reference voltage for analog-to-digital conversion (internal or external reference). Reference input for
external reference. Bypass internal reference with 1µF capacitor to GND.
Common reference for analog inputs. Sets zero-code voltage in single-ended mode. Must be stable to
±0.5LSB during conversion.
Active-Low Chip Select. Data is not clocked into DIN unless CS is low. When CS is high, DOUT is high
impedance.
Serial Data Input. Data is clocked in at the rising edge of SCLK.
Serial Data Output. Data is clocked out on the falling edge of SCLK. High impedance when CS is high.
Serial Clock Input. Clocks data in and out of serial interface. In external clock mode, SCLK also sets the
conversion speed.
40
V
DD
DD
200
= 5V
60
= +5.0V (MAX1109); external conversion mode; f
250
80
300
100
1.0010
1.0005
1.0000
0.9995
0.9990
0.9985
0.9980
-100
-20
-40
-60
-80
Typical Operating Characteristics (continued)
20
0
-40
0
2-Channel, Serial 8-Bit ADCs
NORMALIZED REFERENCE VOLTAGE
-20
5
Single-Supply, Low-Power,
vs. TEMPERATURE
0
TEMPERATURE (°C)
10
FREQUENCY (kHz)
FFT PLOT
20
15
f
f
CH_
SAMPLE
40
FUNCTION
= 9997Hz, 2Vp-p
20
60
= 53.25kHz
25
80
SCLK
100
30
= 500kHz; 50ksps; external reference; 1µF at
-100
21.0
20.5
20.0
19.5
19.0
18.5
18.0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
CONVERSION TIME vs. SUPPLY VOLTAGE
0
0
V
INTERNAL CONVERSION MODE
CH_OFF
CROSSTALK vs. FREQUENCY
1
5
CHANNEL-TO-CHANNEL
Pin Description
= V
SUPPLY VOLTAGE (V)
REFp-p
FREQUENCY (kHz)
2
10
3
15
4
20
5
25
6
9