MAX1377ATP+ Maxim Integrated Products, MAX1377ATP+ Datasheet - Page 21

• Manufacturer Part Number: MAX1377ATP+
• Description: IC ADC 12BIT 1.25MSPS DL 20-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1377ATP+

• Number Of Bits: 12
• Sampling Rate (per Second): 1.25M
• Data Interface: DSP, MICROWIRE™, QSPI™, Serial, SPI™
• Number Of Converters: 2
• Power Dissipation (max): 40mW
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-WQFN, Exposed Pad
• Number Of Adc Inputs: 2
• Architecture: SAR
• Conversion Rate: 1.25 MSPs
• Resolution: 10 bit
• Interface Type: Dual Serial
• Voltage Reference: Internal 2.048 V or External
• Supply Voltage (max): 3.3 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

For CPOL = 0 and CPHA = 0 or CPOL = 1 and CPHA =
1, the data is clocked into the µC on the rising edge of
SCLK. For CPOL = 0 and CPHA = 1 or CPOL = 1 and
CPHA = 0, the data is clocked into the µC on the falling
edge of SCLK. The MAX1377/MAX1379/MAX1383 are
compatible with all CPOL/CPHA configurations since
the data is valid on the falling and rising edge of SCLK.
Unlike SPI, which requires two 8-bit reads to acquire
the 12 bits of data from the ADC, QSPI allows the mini-
mum number of clock cycles necessary to clock in the
data. The MAX1377/MAX1379/MAX1383 require 16
Figure 13. Data Valid and Hold Times
Figure 14. Power-Supply Grounding and Bypassing
Dual, 12-Bit, 1.25Msps Simultaneous-Sampling
ANALOG
SUPPLY
AVDD
OPTIONAL
FERRITE
BEAD
DOUT_
SCLK
RETURN
AGND
MAX1377
MAX1379
MAX1383
______________________________________________________________________________________
t
DOUT
V
SUPPLIES
L
DGND
t
DHOLD
DIGITAL
SUPPLY
V
DD
CIRCUITRY
DIGITAL
RETURN
GND
QSPI
ADCs with Serial Interface
clock cycles from the µC to clock out the 12 bits of
data. The conversion result contains three zeros fol-
lowed by the 12 data bits, and a trailing zero with the
data in the MSB-first format.
The MAX1377/MAX1379/MAX1383 are ideally suited for
motor-control systems (Figure 16). The devices’ simulta-
neously sampled inputs eliminate the need for complicat-
ed DSP algorithms that realign sequentially sampled
data into a simultaneous sample set. The ±10V
(MAX1383) input allows for standard industrial inputs,
eliminating the need for voltage-scaling amplifiers.
Figure 15. Common Serial-Interface Connections to the
MAX1377/MAX1379/MAX1383
A) SPI
B) QSPI
C) MICROWIRE
MISO2
MISO2
MISO1
MISO1
SCK
SCK
SI2
I/O
SS
CS
SK
SI1
SS
I/O
Three-Phase Motor Controller
3V TO 5V
3V TO 5V
DOUT1
CNVST
CNVST
SCLK
DOUT2
SCLK
DOUT1
CNVST
SCLK
DOUT2
DOUT1
DOUT2
MAX1377
MAX1379
MAX1383
MAX1377
MAX1379
MAX1383
MAX1377
MAX1379
MAX1383
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