MAX14001 Datasheet, PDF (10/34 Pages) Maxim Integrated Products – Configurable, Isolated 10-bit ADCs for Multi-Range Binary Inputs

MAX14001/MAX14002
Configurable, Isolated 10-bit ADCs for
Multi-Range Binary Inputs
Pin Configuration
TOP VIEW
ISET 1
GNDF 2
AIN 3
AGND 4
REFIN 5
IC 6
IFET 7
GATE 8
VDDF 9
GNDF 10
+
MAX14001
MAX14002
20 _VDDL
19 GNDL
18 FAULT
17 COUT
16 CS
15 SCLK
14 SDI
13 SDO
12 V_DD
11 GNDL
20-SSOP
7.9mm
7.33mm
Pin Description
PIN
NAME
POWER SUPPLY
20
V_DDL
12
11, 19
9
V_DD
GNDL
V_DDF
8
2, 10
ANALOG
GATE
GNDF
1
ISET
7
IFET
3
AIN
4
AGND
5
REFIN
6
IC
REFERENCE
FUNCTION
GNDL
GNDL
—
GNDF
GNDF
—
Power Input for the Logic-Side of the MAX14001/MAX14002. Bypass with
10µF||1000pF capacitors to GNDL.
Power Input for the Isolated DC-DC Converter. The DC-DC converter powers the field-
side of the MAX14001/MAX14002. Bypass with 10µF||1000pF capacitors to GNDL.
Power and Signal Ground for All Logic-Side Pins.
Unregulated Output of the DC-DC Converter. Bypass to GNDF with 0.1µF||1000pF
capacitors. The 1000pF capacitor should be placed as close to the pin as possible.
Bias Voltage for the Gate of the External Depletion Mode FET. Connect a 0.01µF
capacitor from GATE to GNDF.
Field-side ground for everything except the ADC front-end and voltage reference.
GNDF
GNDF
AGND
—
AGND
GNDF
Connect a 120kΩ Resistor From ISET to GNDF. This generates a reference current
used to establish the correct bias and inrush currents. Parasitic capacitance on this
pin should not exceed 10pF.
Current Sink Input for Inrush and Bias Current. This pin is buffered from high
voltage by connecting it to the source of the external high-voltage FET. Connect a
1000pF capacitor from IFET to GNDF.
Analog Input. The ADC measures the voltage on this pin with respect to AGND.
Analog Ground Reference for AIN and REFIN
Optional External Voltage Reference Input (Nominally 1.25V). When an external
reference is used, connect a 0.1μF bypass capacitor from REFIN to AGND. When
an internal reference is used, connect REFIN directly to AGND.
Internally Connected. Connect to GNDF.
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