MAX1192ETI+ Maxim Integrated Products, MAX1192ETI+ Datasheet - Page 22

• Manufacturer Part Number: MAX1192ETI+
• Description: IC ADC 8BIT 22MSPS DUAL 28-TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1192ETI+

• Number Of Bits: 8
• Sampling Rate (per Second): 22M
• Data Interface: Parallel
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-WFQFN Exposed Pad
• Number Of Adc Inputs: 2
• Conversion Rate: 22 MSPs
• Resolution: 8 bit
• Input Type: Differential
• Interface Type: Parallel
• Voltage Reference: Internal 2.048 V or External
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Power Dissipation: 1667 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Ultra-Low-Power, 22Msps, Dual 8-Bit ADC
Figure
erence used as a common reference for multiple con-
verters. The 1.248V output of the MAX6061 is divided
down to 1.023V as it passes through a one-pole, 10Hz,
lowpass filter to the MAX4250. The MAX4250 buffers
the 1.023V reference before its output is applied to the
MAX1192. The MAX4250 provides a low offset voltage
(for high gain accuracy) and a low noise level.
Figure 10. External Buffered (MAX4250) Reference Drive Using a MAX6062 Bandgap Reference
22
NOTE: ONE FRONT-END REFERENCE
CIRCUIT PROVIDES ±15mA OF OUTPUT
DRIVE AND SUPPORTS OVER
1000 MAX1192s.
0.1μF
______________________________________________________________________________________
10 shows the MAX6061 precision bandgap ref-
3V
MAX6061
1
3
2
1μF
LOWPASS
1.248V
FILTER
10Hz
3
4
MAX4250
1%
20kΩ
1%
90.9kΩ
5
2
3V
1
0.1μF
15Ω
The unbuffered external reference mode allows for pre-
cise control over the MAX1192 reference and allows
multiple converters to use a common reference.
Connecting REFIN to GND disables the internal refer-
ence, allowing REFP, REFN, and COM to be driven
directly by a set of external reference sources.
Unbuffered External Reference Drives
0.33μF
0.33μF
0.33μF
0.33μF
0.33μF
0.33μF
0.1μF
0.1μF
1.023V
24
27
26
25
24
27
26
25
REFIN
REFP
REFN
COM
REFIN
REFP
REFN
COM
MAX1192
MAX1192
N = 1000
N = 1
V
GND
V
GND
DD
DD
0.1μF
Multiple ADCs
2.2μF