MAX1198ECM+D Maxim Integrated Products, MAX1198ECM+D Datasheet - Page 19

• Manufacturer Part Number: MAX1198ECM+D
• Description: IC ADC 8BIT 100MSPS DUAL 48-TQFP
• Manufacturer: Maxim Integrated Products

Specifications of MAX1198ECM+D

• Number Of Bits: 8
• Sampling Rate (per Second): 100M
• Data Interface: Parallel
• Number Of Converters: 2
• Power Dissipation (max): 314mW
• 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
• Conversion Rate: 100 MSPs
• Resolution: 8 bit
• Snr: 48.5 dB
• Voltage Reference: 2.048 V
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Power Dissipation: 1000 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Input Voltage: 3.3 V
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 10. Typical QAM Application Using the MAX1198
Figure 11. T/H Aperture Timing
physical location of the analog ground (GND) and the
digital output driver ground (OGND) on the ADC’s
package. The two ground planes should be joined at a
single point so the noisy digital ground currents do not
interfere with the analog ground plane. The ideal loca-
tion for this connection can be determined experimen-
tally at a point along the gap between the two ground
planes, which produces optimum results. Make this
connection with a low-value, surface-mount resistor (1Ω
to 5Ω), a ferrite bead, or a direct short.
Alternatively, all ground pins could share the same
ground plane if the ground plane is sufficiently isolated
from any noisy, digital systems ground plane (e.g.,
downstream output buffer or DSP ground plane). Route
high-speed digital signal traces away from the sensitive
analog traces of either channel. Make sure to isolate
the analog input lines to each respective converter to
minimize channel-to-channel crosstalk. Keep all signal
lines short and free of 90° turns.
DATA (T/H)
with Internal Reference and Parallel Outputs
SAMPLED
ANALOG
INPUT
Dual, 8-Bit, 100Msps, 3.3V, Low-Power ADC
CLK
T/H
t
AD
TRACK
______________________________________________________________________________________
t
HOLD
AJ
DOWNCONVERTER
TRACK
MAX2451
Integral nonlinearity (INL) is the deviation of the values
on an actual transfer function from a straight line. This
straight line can be either a best-straight-line fit or a line
drawn between the endpoints of the transfer function,
once offset and gain errors have been nullified. The
static linearity parameters for the MAX1198 are mea-
sured using the best-straight-line-fit method.
Differential nonlinearity (DNL) 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 11 depicts the aperture jitter (t
sample-to-sample variation in the aperture delay.
Aperture delay (t
rising edge of the sampling clock and the instant when
an actual sample is taken (Figure 11).
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
quantization error (residual error). The ideal, theoretical
minimum analog-to-digital noise is caused by quantiza-
tion error only and results directly from the ADC’s reso-
lution (N-bits):
÷ 8
Dynamic Parameter Definitions
0°
Static Parameter Definitions
SNR
90°
dB[max]
AD
) is the time defined between the
= 6.02
Differential Nonlinearity
INA+
INA-
INB+
INB-
MAX1198
Signal-to-Noise Ratio
Integral Nonlinearity
dB
✕
N + 1.76
Aperture Delay
Aperture Jitter
AJ
), which is the
PROCESSING
dB
POST-
DSP
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