Datasheet
MAX1303
4-Channel, ±V
REF
Multirange Inputs,
Serial 16-Bit ADC
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(V
AVDD1
= V
AVDD2
= V
DVDD
= V
DVDDO
= 5V, V
AGND1
= V
VDGND
= V
DGNDO
= V
AGND2
= V
AGND3
= 0V, f
CLK
= 3.5MHz (50% duty
cycle), external clock mode, V
REF
= 4.096V (external reference operation), REFCAP = AVDD1, maximum single-ended bipolar input
range (±V
REF
), C
DOUT
= 50pF, C
SSTRB
= 50pF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
INTERNAL REFERENCE (Bypass REFCAP with 0.1µF to AGND1 and REF with 1.0µF to AGND1)
Reference Output Voltage V
REF
4.056 4.096 4.136 V
Reference Temperature
Coefficient
TC
REF
±30 ppm/°C
REF shorted to AGND1 10
Reference Short-Circuit Current I
REFSC
REF shorted to AVDD -1
mA
Reference Load Regulation I
REF
= 0 to 0.5mA 0.1 10 mV
EXTERNAL REFERENCE (REFCAP = AVDD)
Reference Input Voltage Range V
REF
3.800 4.136 V
REFCAP Buffer Disable
Threshold
V
RCTH
(Note 5)
V
AV D D 1
- 0.4
V
AVDD1
- 0.1
V
V
REF
= +4.096V, external clock mode,
external acquisition mode, internal clock
mode, or partial power-down mode
90 200
Reference Input Current I
REF
V
REF
= +4.096V, full power-down mode ±0.1 ±10
µA
External clock mode, external acquisition
mode, internal clock mode, or partial
power-down mode
20 45 kΩ
Reference Input Resistance R
REF
Full power-down mode 40 MΩ
DIGITAL INPUTS (DIN, SCLK, CS)
Input High Voltage V
IH
0.7 x
V
D V DD O
V
Input Low Voltage V
IL
0.3 x
V
D V DD O
V
Input Hysteresis V
HYST
0.2 V
Input Leakage Current I
IN
V
IN
= 0 to V
DVDDO
-10 +10 µA
Input Capacitance C
IN
10 pF
DIGITAL OUTPUTS (DOUT, SSTRB)
V
DVDDO
= 4.75V, I
SINK
= 10mA 0.4
Output Low Voltage V
OL
V
DVDDO
= 2.7V, I
SINK
= 5mA 0.4
V
Output High Voltage V
OH
I
SOURCE
= 0.5mA
V
DVDDO
- 0.4
V
DOUT Tri-State Leakage Current I
DDO
CS = DVDDO -10 +10 µA
POWER REQUIREMENTS (AVDD1 and AGND1, AVDD2 and AGND2, DVDD and DGND, DVDDO and DGNDO)
Analog Supply Voltage AVDD1 4.75 5.25 V
Digital Supply Voltage DVDD 4.75 5.25 V