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MAX1227_12 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) (Note 8)
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Low
Input Voltage High
Input Hysteresis
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS (DOUT, EOC)
VIL
VIH
VHYST
IIN
CIN
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 9)
IDD
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
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
2400 2700
1750 2000
1000 1200
0.2
5
µA
1550 2000
1050 1200
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: When CNVST is configured as a digital input, do not apply a voltage between VIL and VIN.
Note 9: 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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