19-1646; Rev 0; 2/00
MAX1294 Evaluation Kit
General Description
The MAX1294 evaluation kit (EV kit) is assembled with a
MAX1294 and the basic components necessary to
evaluate the 12-bit analog-to-digital converter (ADC).
Connectors for power supplies, analog inputs, and digi-
tal signals simplify connections to the device. A 40-pin
header allows the user to connect a logic analyzer
using a ribbon cable or the conventional miniclips. BNC
connectors with 50鈩?termination provide easy connec-
tion between function generators and the analog inputs.
The board layout is designed to yield 12-bit accuracy
with low noise when sampling at the maximum rate of
420ksps.
The MAX1294 EV kit may also be used to evaluate the
MAX1295. Request a free sample of the MAX1295BCEI
when ordering the MAX1294 EV kit.
o
12-Bit Analog-to-Digital Conversion
o
Six Input Channels
o
12-Bit-Wide Digital Interface
o
Internal Track and Hold
o
420kHz Sampling Rate
o
Internal 2.5V Reference
o
Internal Clock
o
Low-Power Standby Mode
o
Fully Assembled Surface-Mount Board
Features
Evaluates: MAX1294/MAX1295
Ordering Information
PART
MAX1294EVKIT
TEMP. RANGE
0擄C to +70擄C
IC PACKAGE
28 QSOP
Component List
DESIGNATION QTY
C1, C3
C2, C6鈥揅12
C4, C5
INT, RD, WR,
CLK,
CS,
COM,
CH0-CH5
J1
JU1, JU2
R1, R2
R4鈥揜14
U1
None
None
None
2
8
2
12
1
2
2
11
1
2
1
1
DESCRIPTION
4.7碌F, 10V tantalum capacitors
AVX TAJB475M010R
0.1碌F ceramic capacitors
0.01碌F ceramic capacitors
BNC connectors
40-pin header
2-pin headers
47k鈩? 9-resistor, 10-pin SIPs
51鈩?鹵5% resistors
MAX1294BCEI
Shunts
MAX1294 printed circuit board
MAX1294 data sheet
Quick Start
The MAX1294 EV kit comes fully assembled and tested.
The following equipment is required:
鈥?A +5V linear power supply (switching supplies will in-
duce excess noise on the power input)
鈥?A low-distortion function generator
鈥?A logic analyzer
A logic analyzer or other digital system is needed to
provide the clock and control signals and to capture
the conversion results of the MAX1294. Connect the
logic analyzer using a 40-pin ribbon cable or a combi-
nation of BNC cables, ribbon cable, and miniclips.
Refer to the MAX1294 data sheet for detailed informa-
tion on timing requirements.
The analog input signals must be delivered by a low-
distortion source to achieve full 12-bit accuracy. All
analog channels connect to BNC connectors terminat-
ed with 51鈩?resistors. For best low-noise performance,
maintain separate analog and digital supplies and
grounds to the board. The grounds are connected in a
star configuration centered on the ground plane of the
board. Refer to the MAX1294/MAX1296 data sheet for a
detailed discussion of signal grounds.
Many of the digital and analog signals on the evaluation
kit have 51鈩?termination resistors matching typical gen-
erator impedance. These should be removed if high-
impedance sources are used.
________________________________________________________________
Maxim Integrated Products
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
1
2
3
4
5
6
7
8
