MAX1193EVKIT Maxim Integrated Products, MAX1193EVKIT Datasheet - Page 20

• Manufacturer Part Number: MAX1193EVKIT
• Description: EVAL KIT FOR MAX1193
• Manufacturer: Maxim Integrated Products

Specifications of MAX1193EVKIT

• Number Of Adc's: 2
• Number Of Bits: 8
• Sampling Rate (per Second): 45M
• Data Interface: Parallel
• Inputs Per Adc: 1 Differential
• Input Range: ±512 mV
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1191, MAX1192, MAX1193
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Ultra-Low-Power, 45Msps, Dual 8-Bit ADC
Figure 10. External Buffered (MAX4250) Reference Drive Using a MAX6062 Bandgap Reference
Figure 10 shows the MAX6061 precision bandgap ref-
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
MAX1193. The MAX4250 provides a low offset voltage
(for high gain accuracy) and a low noise level.
20
NOTE: ONE FRONT-END REFERENCE
CIRCUIT PROVIDES ±15mA OF OUTPUT
DRIVE AND SUPPORTS OVER 1000
MAX1193s.
0.1µF
______________________________________________________________________________________
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 MAX1193 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
MAX1193
MAX1193
N = 1000
N = 1
V
GND
V
GND
DD
DD
Multiple ADCs
0.1µF
2.2µF