MAX1359B Maxim Integrated Products, MAX1359B Datasheet - Page 24

• Manufacturer Part Number: MAX1359B
• Description: Data-Acquisition System
• Manufacturer: Maxim Integrated Products

DataSheet.in
The MAX1359B DAS features a multiplexed differential
16-bit ADC, 10-bit force-sense DAC, an RTC with an
alarm, a selectable bandgap voltage reference, a signal-
detect comparator, 1.8V and 2.7V voltage monitors, and
wake-up control circuitry, all controlled by a 4-wire serial
interface. (See Figure 3 for the functional diagram).
The DAS directly interfaces to various sensor outputs
and, once configured, provides the stimulus, signal
conditioning, and data conversion, as well as µP sup-
16-Bit, Data-Acquisition System with ADC, DAC,
UPIOs, RTC, Voltage Monitors, and Temp Sensor
Figure 3. Functional Diagram
24
______________________________________________________________________________________
DOUT
SCLK
SCM1
SCM2
SNO1
SNO2
AIN2
SNC1
SNC2
AIN1
DIN
CS
SPDT1
SPDT2
INTERFACE
CURRENT
SOURCE
DGND
SERIAL
PROG
DV
DD
Detailed Description
TEMP+
TEMP-
SCM2
SCM1
AGND
AGND
SNO2
OUTA
SNC2
SNO1
SNC1
OUT2
INM1
OUT1
AIN2
AIN1
IN2-
FBA
REF
REF
32KIN
AIN1
AIN2
SENSOR
OSCILLATOR
TEMP
32.768kHz
CONTROL
LOGIC
MUX
POS
MUX
NEG
10:1
10:1
32KOUT
POLARITY
FLIPPER
TEMP+
TEMP-
32K
INPUT/OUTPUT
CONTROL
RTC AND
PROG. Vos
CLK32K
CLK32K
ALARM
Av = 1, 2, 4, 8 V/V
IN1+
PGA
CMP
M32K
IN1-
M32K
MAX1359B
16-BIT ADC
IN+
IN-
OP1
4.9152MHz HF
OSCILLATOR
WATCHDOG
REF
AND FLL
port. See the Applications section for sample
MAX1359B applications.
The 16-bit ADC features programmable continuous con-
version rates as shown in Table 4, and gains of 1, 2, 4,
and 8 (Table 5) to suit applications with different power
and dynamic range constraints. The force-sense DAC
provides 10-bit resolution for precise sensor applica-
tions. The ADCs and DAC utilize a low-drift 1.25V inter-
nal bandgap reference for conversions and full-scale
range setting. The RTC has a 138-year range and pro-
vides an alarm function that can be used to wake up
TIMER
PWM
CLK
OUT1
WDTO
HFCLK
HFCLK
CRDY
ALD
SDC
ADD
ADOU
1.25V BANDGAP
10-BIT DAC
CPOUT (2.7V)
LINEAR 1.65V
REGULATOR
INTERRUPT
REF
MONITOR
VOLTAGE
VOLTAGE
STATUS
LCPD
DV
INT
UPR<4:1>
UPF<4:1>
IN2+
DD
16
LDVD
M32K
IN2-
BUF
Av = 1, 1.6384, 2 V/V
4
4
DV
DOUBLER
CHARGE-
MONITOR
VOLTAGE
PUMP
AV
OP2
UPIO
DD
PGA
DD
AGND
(1.8V)
CPOUT
CF+
CF-
REG
REF
SWA
FBA
OUTA
UPIO1
UPIO2
UPIO3
UPIO4
RESET
OUT2