MAX197BCWI+ Maxim Integrated Products, MAX197BCWI+ Datasheet - Page 12

• Manufacturer Part Number: MAX197BCWI+
• Description: IC DAS 12BIT SNGL 28-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Data Acquisition System (DAS)r

Specifications of MAX197BCWI+

• Resolution (bits): 12 b
• Sampling Rate (per Second): 100k
• Data Interface: Parallel
• Voltage Supply Source: Single Supply
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Package: 28SOIC W
• Resolution: 12 Bit
• Sampling Rate: 100 KSPS
• Architecture: SAR
• Number Of Adcs: 1
• Number Of Analog Inputs: 8
• Digital Interface Type: Parallel
• Input Type: Voltage
• Polarity Of Input Voltage: Unipolar|Bipolar
• Number Of Adc Inputs: 8
• Conversion Rate: 100 KSPs
• Voltage Reference: Internal 4.096 V or External
• Supply Voltage (max): 5 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Select external clock mode by writing the control byte
with D7 = 0 and D6 = 0. Figure 8 shows CLK and WR
timing relationships in internal and external acquisition
modes, with an external clock. A 100kHz to 2.0MHz
Multi-Range (±10V, ±5V, +10V, +5V),
Single +5V, 12-Bit DAS with 8+4 Bus Interface
Figure 8a. External Clock and WR Timing (Internal Acquisition Mode)
Figure 8b. External Clock and WR Timing (External Acquisition Mode)
12
CLK
CLK
CLK
CLK
WR
WR
WR
WR
______________________________________________________________________________________
t
CWH
ACQMOD = "1"
ACQMOD = "1"
ACQMOD = "0"
ACQMOD = "0"
ACQUISITION STARTS
ACQUISITION STARTS
ACQUISITION STARTS
t
t
DH
DH
External Clock Mode
ACQUISITION STARTS
t
CWS
WR GOES HIGH WHEN CLK IS HIGH
WR GOES HIGH WHEN CLK IS LOW
WR GOES HIGH WHEN CLK IS LOW
WR GOES HIGH WHEN CLK IS HIGH
external clock with 45% to 55% duty cycle is required
for proper operation. Operating at clock frequencies
lower than 100kHz will cause a voltage droop across
the hold capacitor, and subsequently degrade perfor-
mance.
ACQUISITION ENDS
t
CWH
ACQUISITION ENDS
ACQMOD = "0"
ACQUISITION ENDS
ACQUISITION ENDS
ACQMOD = "0"
t
CWS
CONVERSION STARTS
CONVERSION STARTS
CONVERSION STARTS
CONVERSION STARTS