1
dc1763af
DEMO MANUAL DC1763A
DESCRIPTION
LTC2195, LTC2194, LTC2193,
LTC2192, LTC2191, LTC2190
16-Bit, 25Msps to 125Msps Dual ADCs
Demonstration circuit 1763A supports a family of 16-Bit
25Msps to 125Msps ADCs. Each assembly features one
of the following devices: LTC
®
2195, LTC2194, LTC2193,
LTC2192, LTC2191, LTC2190 high speed, dual ADCs.
The versions of the 1763A demo board are listed in Table 1.
Depending on the required resolution and sample rate,
the DC1763A is supplied with the appropriate ADC. The
L
, LT, LTC, LTM, μModule, Linear Technology and the Linear logo are registered trademarks
and PScope is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
circuitry on the analog inputs is optimized for analog input
frequencies from 5MHz to 140MHz. Refer to the data sheet
for proper input networks for different input frequencies.
Design files for this circuit board are available at
http://www.linear.com/demo
Table 1. DC1763A Variants
DC1763A VARIANTS
ADC PART NUMBER
RESOLUTION
MAXIMUM SAMPLE RATE
INPUT FREQUENCY
1763A-A
LTC2195
16-Bit
125Msps
5MHz to 140MHz
1763A-B
LTC2194
16-Bit
105Msps
5MHz to 140MHz
1763A-C
LTC2193
16-Bit
80Msps
5MHz to 140MHz
1763A-D
LTC2192
16-Bit
65Msps
5MHz to 140MHz
1763A-E
LTC2191
16-Bit
40Msps
5MHz to 140MHz
1763A-F
LTC2190
16-Bit
25Msps
5MHz to 140MHz
PERFORMANCE SUMMARY
(T
A
= 25°C)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage – DC1763A
Depending on Sampling Rate and the A/D Converter
Provided, this Supply Must Provide up to 500mA.
3
3.6
6
V
Analog Input Range
Depending on SENSE Pin Voltage
1
2
V
P-P
Logic Input Voltages
Minimum Logic High
Maximum Logic Low
1.3
0.6
V
V
Logic Output Voltages (Differential)
Nominal Logic Levels (100Ω Load, 3.5mA Mode)
Common
Mode
Minimum Logic Levels (100Ω Load, 3.5mA Mode)
Common
Mode
350
1.25
247
1.25
mV
V
mV
V
Sampling Frequency (Convert Clock Frequency)
See Table 1
Encode Clock Level
Single-Ended Encode Mode (ENC
–
Tied to GND)
Differential Encode Mode (ENC
–
Not Tied to GND)
0
0.2
3.6
3.6
V
V
Resolution
See Table 1
Input Frequency Range
See Table 1
SFDR
See Applicable Data Sheet
SNR
See Applicable Data Sheet
