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| MAX1108 Datasheet, PDF (4/20 Pages) Maxim Integrated Products – Single-Supply, Low-Power, 2-Channel, Serial 8-Bit ADCs | |||
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Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
ELECTRICAL CHARACTERISTICSâMAX1108 (continued)
(VDD = +2.7V to +3.6V; unipolar input mode; COM = GND, fSCLK = 500kHz, external clock mode (50% duty cycle); 10 clocks/conver-
sion cycle (50ksps); 1µF capacitor at REF, external +2.048V reference at REF; TA = TMIN to TMAX; unless otherwise noted. Typical
values are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DIGITAL OUTPUT (DOUT)
Output High Voltage
VOH ISOURCE = 0.5mA
VDD - 0.5
V
Output Low Voltage
Three-State Leakage Current
Three-State Output Capacitance
VOL
IL
COUT
ISINK = 5mA
ISINK = 16mA
CS = VDD
CS = VDD
0.4
V
0.8
V
±0.01 ±10
µA
15
pF
TIMING CHARACTERISTICS (Figures 8, 9, and 10)
Acquisition Time
tACQ
1.0
µs
DIN to SCLK Setup Time
tDS
100
ns
DIN to SCLK Hold Time
tDH
0
ns
SCLK Fall to Output Data Valid
CS Fall to Output Enable
CS Rise to Output Disable
CS to SCLK Rise Setup
CS to SCLK Rise Hold
tDO
tDV
tTR
tCSS
tCSH
Figure 1, CLOAD = 100pF
Figure 1, CLOAD = 100pF
Figure 2, CLOAD = 100pF
20
200
ns
240
ns
240
ns
100
ns
0
ns
SCLK Pulse Width High
tCH
200
ns
SCLK Pulse Width Low
tCL
200
ns
Wake-Up Time
Wake-Up Time
External reference
tWAKE Internal reference (Note 10)
20
µs
12
ms
ELECTRICAL CHARACTERISTICSâMAX1109
(VDD = +4.5V to +5.5V; unipolar input mode; COM = GND, fSCLK = 500kHz, external clock (50% duty cycle); 10 clocks/conversion
cycle (50ksps); 1µF capacitor at REF, external +4.096V reference at REF; TA = TMIN to TMAX; unless otherwise noted. Typical values
are at TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
DC ACCURACY
Resolution
8
bits
Relative Accuracy (Note 1)
Differential Nonlinearity
INL
DNL
VDD = 4.5V to 5.5V
No missing codes over temperature
±0.15 ±0.5 LSB
±1
LSB
Offset Error
Gain Error (Note 3)
VDD = 4.5V to 5.5V
±0.2
±1
LSB
±1
LSB
Gain Temperature Coefficient
±0.8
ppm/°C
Total Unadjusted Error
TUE
TA = +25°C
TA = TMIN to TMAX
±1
LSB
±0.5
Channel-to-Channel
Offset Matching
±0.1
LSB
VDD / 2 Sampling Accuracy
50
mV
4 _______________________________________________________________________________________
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