Rainbow Electronics MAX1030 - Manual (Page 9)

MAX1026/MAX1028/MAX1030
10-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
_______________________________________________________________________________________ 9
Detailed Description
The MAX1026/MAX1028/MAX1030 are low-power, seri-
al-output, multichannel ADCs with temperature-sensing
capability for temperature-control, process-control, and
monitoring applications. These 10-bit ADCs have inter-
nal track and hold (T/H) circuitry that supports single-
ended and fully differential inputs. Data is converted
from an internal temperature sensor or analog voltage
sources in a variety of channel and data-acquisition
configurations. Microprocessor (µP) control is made
easy through a 3-wire SPI/QSPI/MICROWIRE-compati-
ble serial interface.
Figure 2 shows a simplified functional diagram of the
MAX1026/MAX1028/MAX1030 internal architecture. The
MAX1026 has eight single-ended analog input chan-
nels or four differential channels. The MAX1028 has 12
single-ended analog input channels or six differential
channels. The MAX1030 has 16 single-ended analog
input channels or eight differential channels.
SCLK
DIN
DOUT
CS
t DH
t DOE
t DS
t CH t CSS t CP t CSH
t CSH
t CSS
t DOD
t DOT
Figure 1. Detailed Serial-Interface Timing Diagram
12-BIT
SAR
ADC
CONTROL
SERIAL
INTERFACE
OSCILLATOR
FIFO AND
ACCUMULATOR
T/H
TEMP
SENSE
REF-
CNVST
SCLK
CS
DIN
EOC
DOUT
AIN15
AIN1
AIN2
INTERNAL
REFERENCE
REF+
MAX1026
MAX1028
MAX1030
Figure 2. Functional Diagram