MAX1035 Maxim Integrated Products, MAX1035 Datasheet - Page 13

• Manufacturer Part Number: MAX1035
• Description: (MAX1034 / MAX1035) Serial 14-Bit ADCs
• Manufacturer: Maxim Integrated Products

Figure 1. Typical Application Circuit
The MAX1034/MAX1035 multirange, low-power, 14-bit
successive-approximation ADCs operate from a single
+5V supply and have a separate digital supply allowing
digital interface with 2.7V to 5.25V systems. These 14-bit
ADCs have internal track-and-hold (T/H) circuitry that
supports single-ended and fully differential inputs. For
MAX1034 MAX1035
21
22
23
24
PIN
18
19
20
1
______________________________________________________________________________________
8-/4-Channel, ±V
Detailed Description
AGND3
AGND2
AGND1
AV
NAME
DD2
1µF
ACCELERATION
WHEATESTONE
WHEATESTONE
TEMPERATURE
PRESSURE
4–20mA
Analog Signal Ground 3. AGND3 is the ADC negative reference potential. Connect AGND3 to
AGND1. DGND, DGNDO, AGND3, AGND2, and AGND1 must be connected together.
Analog Supply Voltage 2. Connect AV
Bypass AV
Analog Ground 2. This ground carries approximately five times more current than AGND1.
DGND, DGNDO, AGND3, AGND2, and AGND1 must be connected together.
Anal og Gr ound 1. D GN D , D GN DO, AGN D 3, AGN D 2, and AGND 1 must b e connected together .
PLC
0.1µF
0.1µF
DD2
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
REF
AGND1
REFCAP
AGND2
AV
to AGND2 with a 0.1µF capacitor.
5.0V
DD2
0.1µF
AGND3
MAX1034
AV
5.0V
DD1
DGND
single-ended conversions, the valid analog input voltage
range spans from -V
ground. The maximum allowable differential input volt-
age spans from -2 x V
converted in a variety of software-programmable chan-
nel and data-acquisition configurations. Microprocessor
(µP) control is made easy through an SPI-/QSPI-/
MICROWIRE-compatible serial interface.
REF
DGNDO
DV
5.0V
DV
SSTRB
DOUT
SCLK
DD
DDO
DIN
CS
DD2
FUNCTION
0.1µF
to a +4.75V to +5.25V power-supply voltage.
Serial 14-Bit ADCs
Multirange Inputs,
Pin Description (continued)
0.1µF
3.3V
V
SCK
I/O
MOSI
I/O
MISO
DD
MC68HCXX
REF
V
µC
SS
REF
below ground to +V
to +2 x V
REF
. Data can be
REF
above
13