MAX1303BEUP+ Maxim Integrated Products, MAX1303BEUP+ Datasheet - Page 13

• Manufacturer Part Number: MAX1303BEUP+
• Description: ADC Single SAR 115KSPS 16-Bit Serial 20-Pin TSSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1303BEUP+

• Package: 20TSSOP
• Resolution: 16 Bit
• Sampling Rate: 115 KSPS
• Architecture: SAR
• Number Of Adcs: 1
• Number Of Analog Inputs: 4|2
• Digital Interface Type: Serial (SPI, QSPI, Microwire)
• Input Type: Voltage
• Signal To Noise Ratio: 90(Typ) dB
• Polarity Of Input Voltage: Unipolar|Bipolar

Figure 1. Typical Application Circuit
The MAX1302/MAX1303 multirange, low-power, 16-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 16-bit
ADCs have internal track-and-hold (T/H) circuitry that
supports single-ended and fully differential inputs. For
single-ended conversions, the valid analog input voltage
range spans from -V
ground. The maximum allowable differential input voltage
spans from -2 x V
ed in a variety of software-programmable channel and
data-acquisition configurations. Microprocessor (µP) con-
MAX1300 MAX1301
21
22
23
24
PIN
18
19
20
1
REF
______________________________________________________________________________________
REF
to +2 x V
AGND3
AGND2
AGND1
NAME
AV
8-/4-Channel, ±V
Detailed Description
DD2
below ground to +V
1µF
REF
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
AV
Analog Ground 2. This ground carries approximately five times more current than AGND1.
DGND, DGNDO, AGND3, AGND2, and AGND1 must be connected together.
Analog Ground 1. DGND, DGNDO, AGND3, AGND2, and AGND1 must be connected together.
ACCELERATION
TEMPERATURE
WHEATESTONE
WHEATESTONE
DD2
. Data can be convert-
PRESSURE
4–20mA
PLC
to AGND2 with a 0.1µF capacitor.
0.1µF
0.1µF
REF
CHO
CH1
CH2
CH3
CH4
CH5
CH6
CH7
REF
AGND1
REFCAP
AGND2
AV
5.0V
DD2
above
0.1µF
AGND3
MAX1302
AV
5.0V
DD1
DGND
trol is made easy through an SPI-/QSPI-/MICROWIRE-
compatible serial interface.
The MAX1302 has eight single-ended analog input
channels or four differential channels (see the Block
Diagram at the end of the data sheet). The MAX1303 has
four single-ended analog input channels or two differential
channels. Each analog input channel is independently
software programmable for seven single-ended input
ranges (0 to +V
±V
ranges (±V
analog input channels are fault tolerant to ±6V. A fault
condition on an idle channel does not affect the conver-
sion result of other channels.
REF
DGNDO
REF
DD2
DV
5.0V
DV
SSTRB
DOUT
SCLK
DD
DDO
DIN
CS
/4, ±V
to a +4.75V to +5.25V power-supply voltage. Bypass
FUNCTION
0.1µF
REF
Serial 16-Bit ADCs
Multirange Inputs,
REF
Pin Description (continued)
3.3V
0.1µF
/2, ±V
REF
/2, and ±V
V
SCK
I/O
MOSI
I/O
MISO
DD
MC68HCXX
/2, -V
V
REF
µC
SS
REF
, and ±2 x V
REF
/2 to 0, 0 to +V
) and three differential input
REF
). Additionally, all
REF
, -V
REF
to 0,
13