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MAX1227_10 Datasheet, PDF (4/22 Pages) Maxim Integrated Products – 12-Bit 300ksps ADCs with FIFO, Temp Sensor, Internal Reference
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12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
ELECTRICAL CHARACTERISTICS (continued)
(VDD = +2.7V to +3.6V, fSAMPLE = 300kHz, fSCLK = 4.8MHz (50% duty cycle), VREF = 2.5V, TA = TMIN to TMAX, unless otherwise
noted. Typical values are at TA = +25°C.)
PARAMETER
SYMBOL
DIGITAL INPUTS (SCLK, DIN, CS, CNVST)
Input Voltage Low
VIL
Input Voltage High
VIH
Input Hysteresis
VHYST
Input Leakage Current
IIN
Input Capacitance
CIN
DIGITAL OUTPUTS (DOUT, EOC)
Output Voltage Low
VOL
Output Voltage High
Tri-State Leakage Current
Tri-State Output Capacitance
POWER REQUIREMENTS
Supply Voltage
VOH
IL
COUT
VDD
Supply Current (Note 8)
IDD
CONDITIONS
VIN = 0 or VDD
ISINK = 2mA
ISINK = 4mA
ISOURCE = 1.5mA
CS = VDD
CS = VDD
Internal
reference
External
reference
During temp sense
fSAMPLE = 300ksps
fSAMPLE = 0, REF on
Shutdown
During temp sense
fSAMPLE = 300ksps
Shutdown
MIN TYP MAX UNITS
VDD x 0.3
V
VDD x 0.7
V
200
mV
±0.01 ±1.0
µA
15
pF
0.4
V
0.8
VDD - 0.5
V
±0.05 ±1
µA
15
pF
2.7
3.6
V
2200 2700
1550 1800
1000 1200
0.2
5
µA
1550 2000
880 1100
0.2
5
Power-Supply Rejection
PSR VDD = 2.7V to 3.6V; full-scale input
±0.2
±1
mV
Note 1: Tested at VDD = +2.7V, unipolar input mode.
Note 2: Offset nulled.
Note 3: Time for reference to power up and settle to within 1 LSB.
Note 4: Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle.
Note 5: The operational input voltage range for each individual input of a differentially configured pair is from GND to VDD. The
operational input voltage difference is from -VREF/2 to +VREF/2.
Note 6: See Figure 3 (Input Equivalent Circuit) and the Typical Operating Curve in the Sampling Error vs. Source Impedance sec-
tion.
Note 7: Fast automated test, excludes self-heating effects.
Note 8: Supply current is specified depending on whether an internal or external reference is used for voltage conversions.
Temperature measurements always use the internal reference.
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