MAX1444EHJ/V+T Maxim Integrated, MAX1444EHJ/V+T Datasheet - Page 16

• Manufacturer Part Number: MAX1444EHJ/V+T
• Description: Analog to Digital Converters - ADC 10-Bit 40Msps 3.0V Low-Power ADC with Internal Reference
• Manufacturer: Maxim Integrated

Specifications of MAX1444EHJ/V+T

• Number Of Channels: 1
• Architecture: Pipeline
• Conversion Rate: 40 MSPs
• Resolution: 10 bit
• Input Type: Differential
• Snr: 59.5 dB
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Power Dissipation: 1495.3 mW
• Number Of Converters: 1
• Voltage Reference: 1.024 V

10-Bit, 40Msps, 3.0V, Low-Power
ADC with Internal Reference
Multiple-converter systems based on the MAX1195 are
well suited for use with a common reference voltage.
The REFIN pin of those converters can be connected
directly to an external reference source. A precision
bandgap reference like the MAX6062 generates an
external DC level of 2.048V (Figure 10), and exhibits a
noise voltage density of 150nV/√Hz. Its output passes
through a one-pole lowpass filter (with 10Hz cutoff fre-
Figure 10. Buffered External Reference Drives Up to 1000 ADCs
16
3.3V
NOTE: ONE FRONT-END REFERENCE CIRCUIT DESIGN MAY BE USED WITH UP TO 1000 ADCs.
______________________________________________________________________________________
MAX6062
Buffered External Reference Drives
1
3
0.1μF
2
10Hz LOWPASS
16.2kΩ
FILTER
1μF
0.1μF
4
3
Multiple ADCs
MAX4250
5
2
1
10Hz LOWPASS
3.3V
162Ω
FILTER
100μF
0.1μF
quency) to the MAX4250, which buffers the reference
before its output is applied to a second 10Hz lowpass
filter. The MAX4250 provides a low offset voltage (for
high gain accuracy) and a low noise level. The passive
10Hz filter following the buffer attenuates noise pro-
duced in the voltage reference and buffer stages. This
filtered noise density, which decreases for higher fre-
quencies, meets the noise levels specified for precision
ADC operation.
2.048V
0.1μF
0.1μF
0.1μF
0.1μF
0.1μF
N.C.
N.C.
0.1μF
0.1μF
29
31
32
29
31
32
1
2
1
2
REFIN
REFP
REFN
COM
REFIN
REFP
REFN
COM
REFOUT
REFOUT
MAX1444
MAX1444
N = 1000
N = 1
0.1μF
2.2μF
10V