MAX1379ATP+ Maxim Integrated Products, MAX1379ATP+ Datasheet - Page 14

• Manufacturer Part Number: MAX1379ATP+
• Description: IC ADC 12BIT 1.25MSPS DL 20-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1379ATP+

• 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 4.096 V or External
• Supply Voltage (max): 5 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual, 12-Bit, 1.25Msps Simultaneous-Sampling
ADCs with Serial Interface
14
4, 18
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PIN
10
11
12
13
14
15
16
17
19
20
—
1
2
3
5
6
7
8
9
REFSEL
DOUT2
DOUT1
CNVST
NAME
RGND
AGND
AIN2A
AIN2B
DGND
AIN1B
AIN1A
AVDD
SCLK
REF
U/B
SEL
S/D
CS
V
EP
L
Reference-Select Input. Drive REFSEL high to select external reference mode and power down the
internal reference. Drive REFSEL low to select internal reference mode.
Internal Reference Output/External Reference Input. For internal reference mode, bypass REF to
RGND with a ≥ 1µF capacitor. For external reference mode, apply a reference voltage at REF.
Reference Ground/Common Negative Input. In bipolar mode, RGND is the reference ground. In
unipolar mode, RGND is the common negative input for all four analog inputs (see Figure 3).
Analog Ground
Analog-Supply Input. Bypass AVDD with a 10µF || 10nF capacitor to ground.
Primary/Positive Analog Input Channel 2. AIN2A is the primary channel 2 input (AIN2A) if using
single-ended inputs (U/B is low) and the positive channel 2 input (AIN2+) if using differential inputs
(U/B is high) (see Figure 3).
Secondary/Negative Analog Input Channel 2. AIN2B is the secondary channel 2 input (AIN2B) if
using single-ended inputs (U/B is low) and the negative channel 2 input (AIN2-) if using differential
inputs (U/B is high) (see Figure 3).
Unipolar/Bipolar Input. Drive U/B low to select unipolar mode. Drive U/B high to select bipolar
mode. In bipolar mode, the analog inputs are differential.
Digital Supply Ground
Digital Supply Input. Bypass V
Serial-Data Output 2. Data is clocked out on the rising edge of SCLK.
Serial-Data Output 1. Data is clocked out on the rising edge of SCLK.
Serial-Clock Input. Clocks data out of the serial interface. SCLK also sets the conversion time.
Conversion-Start Input. Forcing CNVST high prepares the device for a conversion. Conversion
begins on the falling edge of CNVST.
Active-Low, Chip-Select Input. Drive CS low to enable the serial interface. When CS is high, DOUT1
and DOUT2 are high impedance, the serial interface resets, and the device powers down.
Single-Output/Dual-Output Selection Input. Drive S/D high to route ADC2 data through DOUT1 after
ADC1 data. Drive S/D low for dual outputs with ADC1 data going to DOUT1 and ADC2 data going
to DOUT2. See the Single-/Dual-Output Modes (S/ D ) section.
Analog-Input Selection Input. If U/B is low (unipolar mode), drive SEL low to select the primary
inputs, AIN1A and AIN2A. Drive SEL high to select the secondary inputs, AIN1B and AIN2B. In
bipolar mode, SEL is ignored.
Secondary/Negative Analog Input Channel 1. AIN1B is the secondary channel 1 input (AIN1B) if
using single-ended inputs (U/B is low) and the negative channel 1 input (AIN1-) if using differential
inputs (U/B is high) (see Figure 3).
Primary/Positive Analog Input Channel 1. AIN1A is the primary channel 1 input (AIN1A) if using
single-ended inputs (U/B is low) and the positive channel 1 input (AIN1+) if using differential inputs
(U/B is high) (see Figure 3).
Exposed Pad. EP is internally connected to AGND.
L
with a 10µF || 10nF capacitor to ground.
FUNCTION
Pin Description