Rainbow Electronics MAX1230 - Manual (Page 4)

MAX1226/MAX1228/MAX1230
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
4 _______________________________________________________________________________________
Note 1: Tested at V DD = +5V, 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 V
DD . The
operational input voltage difference is from -V REF / 2 to +V REF / 2.
Note 6: See Figure 3 (Input Equivalent Circuit) and the Sampling Error vs. Source Impedance curve in the Typical Operating
Characterisitcs section.
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.
ELECTRICAL CHARACTERISTICS (continued)
(V DD = +5V ±5%, f SAMPLE = 300kHz, f SCLK = 4.8MHz (50% duty cycle), V REF = 4.096V, T A = T MIN to T MAX , unless otherwise noted.
Typical values are at T A = +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (SCLK, DIN,
CS, CNVST)
Input Voltage Low V
IL
0.8 V
Input Voltage High V IH 2.0 V
Input Hysteresis V HYST 200 mV
Input Leakage Current I IN V IN = 0 or V DD ±0.01 ±1.0 µA
Input Capacitance C IN 15 pF
DIGITAL OUTPUTS (DOUT, EOC)
I SINK = 2mA 0.4
Output Voltage Low V OL
I SINK = 4mA 0.8
V
Output Voltage High V OH I SOURCE = 1.5mA V DD - 0.5 V
Tri-State Leakage Current I L
CS = V
DD ±0.05 ±1 µA
Tri-State Output Capacitance C OUT
CS = V
DD 15 pF
POWER REQUIREMENTS
Supply Voltage V
DD
4.75 5.25 V
During temp sense 2400 3100
f SAMPLE = 300ksps 1950 2300
f SAMPLE = 0, REF on 1000 1350
Internal
reference
Shutdown 0.2 5
During temp sense 1650 2300
f SAMPLE = 300ksps 1250 1500
Supply Current (Note 8) I DD
External
reference
Shutdown 0.2 5
µA
Power-Supply Rejection PSR V DD = 4.75V to 5.25V; full-scale input ±0.2 ±1.2 mV