MAX1294EVKIT Maxim Integrated Products, MAX1294EVKIT Datasheet - Page 2

• Manufacturer Part Number: MAX1294EVKIT
• Description: EVALUATION KIT FOR MAX1294
• Manufacturer: Maxim Integrated Products

Specifications of MAX1294EVKIT

• Number Of Adc's: 1
• Number Of Bits: 12
• Sampling Rate (per Second): 420k
• Data Interface: Parallel
• Inputs Per Adc: 6 Single Ended
• Input Range: ±VREF/2
• Power (typ) @ Conditions: 10mW @ 420kSPS
• Voltage Supply Source: Single Supply
• Operating Temperature: 0°C ~ 70°C
• Utilized Ic / Part: MAX1294, MAX1295
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Connect all supplies and signal lines before turning on
any supply or signal source:
1) Connect a +5V power supply to the VDD pad.
2) Make sure there is no shunt installed on JU1 (Table 1).
3) Connect the analog source (function generators or
4) Connect a logic analyzer, word generator, or other
5) Connect the digital control signals for CS, RD, and
6) Connect the clock signal (0.1MHz to 7.6MHz) to the
7) Turn on the VDD supply, then enable the digital sig-
8) Turn on the analog sources, and the system is ready
9) Use the logic analyzer for data analysis.
The analog inputs are configured for using a function
generator. The inputs have 51Ω loads and 0.1µF
capacitors to match the generator’s impedance. It may
be necessary to remove these if the board is connected
to the user’s system. The system must provide low
impedance and any necessary anti-aliasing filtering.
The MAX1294 evaluation board uses two separate
ground planes to reduce noise. All digital signals con-
nect to the digital ground plane (DGND), and the
noise-sensitive analog signals connect to the separate
analog ground plane (AGND). The two grounds con-
nect at only one point near the ground pin (pin 23) of
the MAX1294. The ground connection (RGND) for the
optional external reference supply is connected direct-
ly to the same point. This “star” ground configuration is
common in low-noise analog systems.
MAX1294 Evaluation Kit
2
Connect the ground to the AGND pad. The DGND
provides additional access to the digital ground
plane.
This enables the internal 2.5V reference.
user signals) to the analog input channels (CH0–
CH5). Install a shunt on JU2 to connect the COM pin
to GND.
source for the digital data lines D0–D11. These sig-
nals are available on the 40-pin header (Table 2).
WR. These signals are available on the 40-pin head-
er or on BNC connectors.
CLK BNC connector or leave the pin open to use the
internal clock.
nal source.
for use.
_______________________________________________________________________________________
Connections and Setup
Detailed Description
Analog Input Signals
Grounding
Table 1. Jumper Functions
*The MAX1294’s 2.5V reference must be disabled before an
external reference voltage is connected. Installing a shunt
across JU1 connects the REFADJ pin to VDD and disables the
on-board reference.
Table 2. 40-Pin Header (J1) Signals
1, 3, 5, 7, 9, 11, 13, 15, 17, 19,
LOCATION
21, 23, 25, 27, 29, 31, 33, 35,
SHUNT
JU1
JU2
36, 38, 40
37, 39
PIN
10
12
14
16
18
20
22
24
26
28
30
32
34
2
4
6
8
SHDN PIN
Shorted
Shorted
Open
Open
REFADJ pin open or driven
externally
REFADJ pin shorted to VDD*
COM pin open or driven exter-
nally
COM pin shorted to AGND
MAX1294 OUTPUT
SIGNAL
GND
CLK
N.C.
D10
D11
INT
WR
RD
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
CS