MAX1157AEUI+ Maxim Integrated, MAX1157AEUI+ Datasheet - Page 12

• Manufacturer Part Number: MAX1157AEUI+
• Description: Analog to Digital Converters - ADC 14-Bit 135ksps 4.2V Precision ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1157AEUI+

• Rohs: yes
• Number Of Channels: 1
• Architecture: SAR
• Conversion Rate: 135 KSPs
• Resolution: 14 bit
• Input Type: Single-Ended
• Snr: 85 dB
• Interface Type: Parallel
• Operating Supply Voltage: 4.75 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-28
• Maximum Power Dissipation: 1026 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

onto the analog lines. If the analog and digital sections
share the same supply, isolate the digital and analog
supply by connecting them with a low value (10Ω)
resistor or ferrite bead.
The ADC is sensitive to high-frequency noise on the
AV
capacitor in parallel with a 1µF to 10µF low-ESR capaci-
tor with the smallest capacitor closest to the device.
Keep capacitor leads short to minimize stray inductance
14-Bit, 135ksps, Single-Supply ADCs with
Bipolar Analog Input Range
Figure 11. MAX1157/MAX1159/MAX1175 Fast-Settling Input
Buffer
Figure 12a. MAX1175 Analog Input Current
12
ANALOG
DD
INPUT
______________________________________________________________________________________
*MAX1157 ONLY.
**MAX1159/MAX1175 ONLY.
supply. Bypass AV
-0.5
-1.0
-1.5
-2.0
MAX427
2.0
1.5
1.0
0.5
0
-5.0
SHUTDOWN MODE
vs. ANALOG INPUT VOLTAGE
ANALOG INPUT CURRENT
ANALOG INPUT VOLTAGE (V)
-2.5
MAX1175
DD
AIN
0
MAX1157
MAX1159
MAX1175
to AGND with a 0.1µF
STANDBY MODE
2.5
*
5.0
REF
**
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 end points of the transfer function,
once offset and gain errors have been nullified. The
static linearity parameters for the MAX1157/MAX1159/
MAX1175 are measured using the endpoint method.
Differential nonlinearity (DNL) is the difference between
an actual step-width and the ideal value of 1LSB. A
DNL error specification of 1LSB guarantees no missing
codes and a monotonic transfer function.
For a waveform perfectly reconstructed from digital
samples, signal-to-noise ratio (SNR) is the ratio of the
full-scale analog input (RMS value) to the RMS quanti-
zation error (residual error). The ideal, theoretical mini-
mum analog-to-digital noise is caused by quantization
noise error only and results directly from the ADC’s res-
olution (N bits):
where N = 14 bits.
Figure 12b. MAX1159 Analog Input Current
-0.5
-1.0
-1.5
1.5
1.0
0.5
SNR = ((6.02
0
-10
SHUTDOWN MODE
vs. ANALOG INPUT VOLTAGE
ANALOG INPUT CURRENT
ANALOG INPUT VOLTAGE (V)
-5
Differential Nonlinearity
MAX1159
✕
Signal-to-Noise Ratio
Integral Nonlinearity
N) + 1.76)dB
0
STANDBY MODE
5
Definitions
10