MAX1224CTC-T Maxim Integrated, MAX1224CTC-T Datasheet - Page 17

• Manufacturer Part Number: MAX1224CTC-T
• Description: Analog to Digital Converters - ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1224CTC-T

• Number Of Channels: 1
• Architecture: SAR
• Conversion Rate: 1.5 MSPs
• Resolution: 12 bit
• Input Type: Differential
• Snr: No
• Interface Type: 3-Wire, Microwire, QSPI, Serial, SPI
• Operating Supply Voltage: 3 V
• Maximum Operating Temperature: + 70 C
• Package / Case: TQFN EP
• Maximum Power Dissipation: 1349 mW
• Minimum Operating Temperature: 0 C
• Number Of Converters: 1
• Voltage Reference: External

For a waveform perfectly reconstructed from digital sam-
ples, signal-to-noise ratio (SNR) is the ratio of the full-
scale analog input (RMS value) to the RMS quantization
error (residual error). The theoretical minimum analog-to-
digital noise is caused by quantization error, and results
directly from the ADC’s resolution (N bits):
In reality, there are other noise sources besides quantiza-
tion noise, including thermal noise, reference noise, clock
jitter, etc. Therefore, SNR is computed by taking the ratio
of the RMS signal to the RMS noise, which includes all
spectral components minus the fundamental, the first five
harmonics, and the DC offset.
Signal-to-noise plus distortion (SINAD) is the ratio of the
fundamental input frequency’s RMS amplitude to the
RMS equivalent of all other ADC output signals:
Effective number of bits (ENOB) indicates the global
accuracy of an ADC at a specific input frequency and
sampling rate. An ideal ADC’s error consists of quantiza-
tion noise only. With an input range equal to the full-scale
range of the ADC, calculate the ENOB as follows:
Total harmonic distortion (THD) is the ratio of the RMS
sum of the first five harmonics of the input signal to the
fundamental itself. This is expressed as:
SINAD(dB) = 20 x log (Signal
THD
=
ENOB
SNR = (6.02 x N + 1.76)dB
20
Signal-to-Noise Plus Distortion
______________________________________________________________________________________
x
log
=
Total Harmonic Distortion
Effective Number of Bits
⎛
⎜
⎜
⎜
⎝
(
SINAD
V
2
2
Signal-to-Noise Ratio
1.5Msps, Single-Supply, Low-Power,
6 02
+
.
V
− 1 76
RMS
3
2
V
1
+
.
V
/ Noise
4
2
)
+
V
5
2
True-Differential, 12-Bit ADCs
RMS
⎞
⎟
⎟
⎟
⎠
)
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
where V
through V
order harmonics.
Spurious-free dynamic range (SFDR) is the ratio of the
RMS amplitude of the fundamental (maximum signal
component) to the RMS value of the next largest distor-
tion component.
Full-power bandwidth is the frequency at which the
input signal amplitude attenuates by 3dB for a full-scale
input.
Full-linear bandwidth is the frequency at which the sig-
nal-to-noise plus distortion (SINAD) is equal to 68dB.
Any device with nonlinearities creates distortion prod-
ucts when two sine waves at two different frequencies
(f
distortion (IMD) is the total power of the IM2 to IM5
intermodulation products to the Nyquist frequency rela-
tive to the total input power of the two input tones, f
and f
The intermodulation products are as follows:
• 2nd-order intermodulation products (IM2): f
• 3rd-order intermodulation products (IM3): 2f
• 4th-order intermodulation products (IM4): 3f
• 5th-order intermodulation products (IM5): 3f
TRANSISTOR COUNT: 13,016
PROCESS: BiCMOS
1
PACKAGE TYPE
f
2f
3f
3f
2
and f
2
2
2
- f
2
12 TQFN
- f
- f
- 2f
. The individual input tone levels are at -7dBFS.
1
1
1
2
, 2f
, 3f
1
1
5
) are input into the device. Intermodulation
, 3f
is the fundamental amplitude, and V
are the amplitudes of the 2nd- through 5th-
1
1
1
Intermodulation Distortion (IMD)
+ f
+ f
+ 2f
2
2
, 2f
, 3f
Spurious-Free Dynamic Range
2
PACKAGE CODE
, 3f
2
2
Package Information
+ f
+ f
2
T1244+3
+ 2f
1
1
Full-Power Bandwidth
Full-Linear Bandwidth
Chip Information
1
DOCUMENT NO.
21-0139
1
1
1
1
- 2f
+ f
- f
- f
17
2
2
2
2
2
1
,
,
,
,