Datasheet

(V
DD
= +2.7V to +3.6V (MAX11627/MAX11629/MAX11633); V
DD
= +4.75V to +5.25V (MAX11626/MAX11628/MAX11632), f
SAMPLE
= 300kHz, f
SCLK
= 4.8MHz external clock (50% duty cycle), V
REF
= 2.5V (MAX11627//MAX11629/MAX11633); V
REF
= 4.096V
(MAX11626/MAX11628/MAX11632), T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
Note 1: MAX11627/MAX11629/MAX11633 tested at V
DD
= +3V. MAX11626/MAX11628/MAX11632 tested at V
DD
= +5V.
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: See Figure 3 (Equivalent Input Circuit) and the Sampling Error vs. Source Impedance curve in the Typical Operating
Characteristics section.
Note 6: When CNVST is configured as a digital input, do not apply a voltage between V
IL
and V
IH
.
Note 7: Supply current is specified depending on whether an internal or external reference is used for voltage conversions.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DIGITAL INPUTS (SCLK, DIN, CS, CNVST)(Note 6)
Input Voltage Low V
IL
MAX11626/MAX11628/MAX11632 0.8
V
MAX11627/MAX11629/MAX11633 V
DD
x 0.3
Input Voltage High V
IH
MAX11626/MAX11628/MAX11632 2.0
V
MAX11627/MAX11629/MAX11633 V
DD
x 0.7
Input Hysteresis V
HYST
200 mV
Input Leakage Current I
IN
V
IN
= 0V or V
DD
±0.01 ±1.0 µA
Input Capacitance C
IN
15 pF
DIGITAL OUTPUTS (DOUT, EOC)
Output Voltage Low V
OL
I
SINK
= 2mA 0.4
V
I
SINK
= 4mA 0.8
Output Voltage High V
OH
I
SOURCE
= 1.5mA V
DD
- 0.5 V
Three-State Leakage Current I
L
CS = V
DD
±0.05 ±1 µA
Three-State Output Capacitance C
OUT
CS = V
DD
15 pF
POWER REQUIREMENTS
Supply Voltage V
DD
MAX11626/MAX11628/MAX11632 4.75 5.25
V
MAX11627/MAX11629/MAX11633 2.7 3.6
MAX11627/MAX11629/MAX11633
Supply Current (Note 7)
I
DD
Internal
reference
f
SAMPLE
= 300ksps 1750 2000
µA
f
SAMPLE
= 0, REF on 1000 1200
Shutdown 0.2 5
External
reference
f
SAMPLE
= 300ksps 1050 1200
Shutdown 0.2 5
MAX11626/MAX11628/MAX11632
Supply Current (Note 7)
I
DD
Internal
reference
f
SAMPLE
= 300ksps 2300 2550
µA
f
SAMPLE
= 0, REF on 1050 1350
Shutdown 0.2 5
External
reference
f
SAMPLE
= 300ksps 1550 1700
Shutdown 0.2 5
Power-Supply Rejection PSR
V
DD
= 2.7V to 3.6V; full-scale input ±0.2 ±1
mV
V
DD
= 4.75V to 5.25V; full-scale input ±0.2 ±1.4
MAX11626–MAX11629/
MAX11632/MAX11633
12-Bit, 300ksps ADCs
with FIFO and Internal Reference
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Electrical Characteristics (continued)