MAX1348BETX+T Maxim Integrated Products, MAX1348BETX+T Datasheet - Page 28

• Manufacturer Part Number: MAX1348BETX+T
• Description: IC ADC/DAC 12BIT W/FIFO 36WQFN
• Manufacturer: Maxim Integrated Products
• Type: ADC, DACr

Specifications of MAX1348BETX+T

• Resolution (bits): 12 b
• Sampling Rate (per Second): 225k
• Data Interface: MICROWIRE™, QSPI™, Serial, SPI™
• Voltage Supply Source: Analog and Digital
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-WQFN Exposed Pad, 36-HWQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12-Bit, Multichannel ADCs/DACs with FIFO,
Temperature Sensing, and GPIO Ports
Table 18. DAC Power-Up and Power-Down Commands
Figures 6–9 illustrate the conversion timing for the
MAX1340/MAX1342/MAX1346/MAX1348. All 12-bit con-
version results are output in 2-byte format, MSB first,
with four leading zeros. Data appears on DOUT on the
falling edges of SCLK. Data is binary for unipolar mode
and two’s complement for bipolar mode and tempera-
ture results. See Figures 3, 4, and 5 for input/output and
temperature-transfer functions.
Figure 3 shows the unipolar transfer function for single-
ended or differential inputs. Figure 4 shows the bipolar
transfer function for differential inputs. Code transitions
28
C3 C2 C1 C0 X
1
1
1
1
1
CONTROL
BITS
1
1
1
1
1
______________________________________________________________________________________
1
1
1
1
1
1
1
1
1
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
ADC Transfer Functions
X
X — — — — 0
X — — — — 0
X — — — — 1
X — — — — 0
X — — — — 1
DATA BITS
Output-Data Format
D3 D2 D1 D0
0
1
0
0
1
1
0
0
0
1
X
X
X
X
X
DESCRIPTION
Power-Down 1
Power-Down 2
Power-Down 3
Power-Down 4
Power-Up
occur halfway between successive-integer LSB values.
Output coding is binary, with 1 LSB = V
unipolar and bipolar operation, and 1 LSB = +0.125°C
for temperature measurements. Bipolar true-differential
results and temperature-sensor results are available in
two’s complement format, while all others are in binary.
See Tables 6, 7, and 8 for details on which setting
(unipolar or bipolar) takes precedence.
In unipolar mode, AIN+ can exceed AIN- by up to
V
other by up to V
REF1
. In bipolar mode, either input can exceed the
Power up individual DAC buffers indicated by data
in DAC0 through DAC3. A one indicates the DAC
output is connected and active. A zero does not
affect the DAC’s present state.
Power down individual DAC buffers indicated by
data in DAC0 through DAC3. A one indicates the
DAC output is disconnected and high impedance.
A zero does not affect the DAC’s present state.
Power down individual DAC buffers indicated by
data in DAC0 through DAC3. A one indicates the
DAC output is disconnected and pulled to AGND
with a 1kΩ resistor. A zero does not affect the DAC’s
present state.
Power down individual DAC buffers indicated by
data in DAC0 through DAC3. A one indicates the
DAC output is disconnected and pulled to AGND
with a 100kΩ resistor. A zero does not affect the
DAC’s present state.
Power down individual DAC buffers indicated by
data in DAC0 through DAC3. A one indicates the
DAC output is disconnected and pulled to REF1 with
a 100kΩ resistor. A zero does not affect the DAC’s
present state.
REF1
/2.
FUNCTION
REF1
/ 4096 for