MAX1184ECM+TD Maxim Integrated Products, MAX1184ECM+TD Datasheet - Page 18

• Manufacturer Part Number: MAX1184ECM+TD
• Description: IC ADC 10BIT 20MSPS DL 48-TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1184ECM+TD

• Number Of Bits: 10
• Sampling Rate (per Second): 20M
• Data Interface: Parallel
• Number Of Converters: 2
• Power Dissipation (max): 150mW
• 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

Differential nonlinearity is the difference between an
actual step width and the ideal value of 1LSB. A DNL
error specification of less than 1LSB guarantees no
missing codes and a monotonic transfer function.
Figure 9 depicts the aperture jitter (t
sample-to-sample variation in the aperture delay.
Aperture delay (t
falling edge of the sampling clock and the instant when
an actual sample is taken (Figure 9).
For a waveform perfectly reconstructed from digital
samples, the theoretical maximum SNR is the ratio of the
full-scale analog input (RMS value) to the RMS quantiza-
tion error (residual error). The ideal, theoretical minimum
analog-to-digital noise is caused by quantization error
only and results directly from the ADC’s resolution
(N-Bits):
In reality, there are other noise sources besides quanti-
zation noise (e.g. thermal noise, reference noise, clock
jitter, etc.). SNR is computed by taking the ratio of the
RMS signal to the RMS noise, which includes all spec-
tral components minus the fundamental, the first five
harmonics, and the DC offset.
Dual 10-Bit, 20Msps, 3V, Low-Power ADC with
Internal Reference and Parallel Outputs
Figure 9. T/H Aperture Timing
18
______________________________________________________________________________________
Dynamic Parameter Definitions
DATA (T/H)
SAMPLED
ANALOG
INPUT
CLK
T/H
SNR
t
AD
Differential Nonlinearity (DNL)
TRACK
dB[max]
AD
Signal-to-Noise Ratio (SNR)
) is the time defined between the
= 6.02 x N + 1.76
t
AJ
HOLD
Aperture Delay
Aperture Jitter
AJ
TRACK
), which is the
SINAD is computed by taking the ratio of the RMS sig-
nal to all spectral components minus the fundamental
and the DC offset.
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
backed off by 6.5dB from full scale.
Table 2. Pin-Compatible Versions
MAX1190
MAX1180
MAX1181
MAX1182
MAX1183
MAX1186
MAX1184
MAX1185
MAX1198
MAX1197
MAX1196
MAX1195
5
are the amplitudes of the 2nd- through 5th-order
PART
THD
Signal-to-Noise Plus Distortion (SINAD)
Spurious-Free Dynamic Range (SFDR)
1
is the fundamental amplitude, and V
=
20
RESOLUTION
Intermodulation Distortion (IMD)
Total Harmonic Distortion (THD)
×
log
(BITS)
10
10
10
10
10
10
10
10
8
8
8
8
10
⎛
⎜
⎜
⎝
V
2
2
SPEED GRADE
+
V
(Msps)
3
120
105
100
2
80
65
40
40
20
20
60
40
40
V
+
1
V
4
2
+
V
Full-Duplex
Full-Duplex
Full-Duplex
Full-Duplex
Full-Duplex
Half-Duplex
Full-Duplex
Half-Duplex
Full-Duplex
Full-Duplex
Half-Duplex
Full-Duplex
5
OUTPUT
2
2
through
BUS
⎞
⎟
⎟
⎠