MAX1109EUB Maxim Integrated, MAX1109EUB Datasheet - Page 7

• 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

ELECTRICAL CHARACTERISTICS—MAX1109 (continued)
(V
cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; T
are at T
(V
REF; T
Note 1: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
Note 2: See Typical Operating Characteristics.
Note 3: V
Note 4: Common-mode range (CH0, CH1, COM) GND to V
Note 5: Conversion time defined as the number of clock cycles times the clock period; clock has 50% duty cycle (Figures 6 and 8).
Note 6: REF supplies typically 2.5mA under normal operating conditions.
Note 7: External load should not change during the conversion for specified accuracy.
Note 8: Power consumption with CMOS levels.
Note 9: Power-down test performed using the following sequence 1) SHDN 5bit = 0 in the configuration register; 2) Wait for 10
Note 10: Measured as
Note 11: 1µF at REF, internal reference settling to 0.5LSB.
CS to SCLK Rise Setup
CS to SCLK Rise Hold
SCLK Pulse Width High
SCLK Pulse Width Low
Wake-Up Time
DD
DD
200
180
160
140
120
100
80
60
40
20
0
= +4.5V to +5.5V; unipolar input mode; COM = GND, f
= +3.0V (MAX1108), V
A
A
SUPPLY CURRENT vs. SUPPLY VOLTAGE
0
= +25°C; unless otherwise noted.)
= +25°C.)
been calibrated.
SCLK cycles to complete current conversion; 3) Measure shutdown current with CS, SCLK, D
PARAMETER
D
MAX1108 (2.7V TO 5.5V)
MAX1109 (4.5V TO 5.5V)
INTERNAL REFERENCE
OUT
REF
1
= 10101010
= +2.048V (MAX1108), V
SUPPLY VOLTAGE (V)
2
_______________________________________________________________________________________
3
V
C
LOAD
FS
DD
(2.7V) - V
= 47pF
4
C
= +5.0V (MAX1109); external conversion mode; f
LOAD
SYMBOL
5
= 10pF
t
t
WAKE
t
CSH
t
FS
CSS
t
CH
CL
REF
(3.6V) for MAX1108, and measured as
6
= +4.096V (MAX1109), offset nulled.
External reference
Internal reference (Note 11)
200
180
160
140
120
100
80
60
40
20
0
-40
SUPPLY CURRENT vs. TEMPERATURE
2-Channel, Serial 8-Bit ADCs
D
C
INTERNAL REFERENCE
OUT
LOAD
-20
= 10101010
= 10pF
Single-Supply, Low-Power,
DD
SCLK
0
CONDITIONS
TEMPERATURE (°C)
.
20
= 500kHz, external clock (50% duty cycle); 10 clocks/conversion
Typical Operating Characteristics
40
V
V
DD
DD
= 5V
= 3V
A
60
= T
80
MIN
SCLK
V
FS
100
to T
(4.5V) - V
= 500kHz; 50ksps; external reference; 1µF at
MAX
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
; unless otherwise noted. Typical values
0.50
0
FS
2.5
MIN
100
200
200
(5.5V) for MAX1109.
0
SHUTDOWN SUPPLY CURRENT
IN
3.0
= V
vs. SUPPLY VOLTAGE
TYP
SUPPLY VOLTAGE (V)
20
12
3.5
DD
or GND.
4.0
MAX
4.5
UNITS
5.0
ms
ns
ns
ns
ns
µs
5.5
7