MAX1185ECM+TD Maxim Integrated Products, MAX1185ECM+TD Datasheet - Page 18

• Manufacturer Part Number: MAX1185ECM+TD
• Description: IC ADC 10BIT 20MSPS DL 48-TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1185ECM+TD

• Number Of Bits: 10
• Sampling Rate (per Second): 20M
• Number Of Converters: 2
• Power Dissipation (max): 2.43W
• Voltage Supply Source: Single Supply
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
Internal Reference and Multiplexed Parallel Outputs
Figure 8. Typical QAM Application, Using the MAX1185
Figure 9. T/H Aperture Timing
18
______________________________________________________________________________________
DATA (T/H)
SAMPLED
ANALOG
INPUT
CLK
T/H
t
AD
TRACK
t
AJ
HOLD
DOWNCONVERTER
TRACK
MAX2451
THD is typically the ratio of the RMS sum of the first four
harmonics of the input signal to the fundamental itself.
This is expressed as:
where V
V
harmonics.
SFDR is the ratio expressed in decibels of the RMS
amplitude of the fundamental (maximum signal compo-
nent) to the RMS value of the next largest spurious
component, excluding DC offset.
The two-tone IMD is the ratio expressed in decibels of
either input tone to the worst 3rd-order (or higher) inter-
modulation products. The individual input tone levels
are backed off by 6.5dB from full scale.
5
are the amplitudes of the 2nd- through 5th-order
THD
÷ 8
Spurious-Free Dynamic Range (SFDR)
1
=
0°
is the fundamental amplitude, and V
90°
20
Intermodulation Distortion (IMD)
Total Harmonic Distortion (THD)
×
log
10
⎛
⎜
⎜
⎝
V
INA+
INA-
INB+
INB-
2
2
MAX1185
+
V
3
2
V
A/B
1
+
V
4
CHA AND CHB DATA
ALTERNATINGLY
AVAILABLE ON 10-BIT,
MULTIPLEXED
OUTPUT BUS
2
+
PROCESSING
V
5
POST
DSP
2
2
⎞
⎟
⎟
⎠
through