MAX1157BEUI+T Maxim Integrated, MAX1157BEUI+T Datasheet - Page 9

• Manufacturer Part Number: MAX1157BEUI+T
• Description: Analog to Digital Converters - ADC 14-Bit 135ksps 4.2V Precision ADC
• Manufacturer: Maxim Integrated

Specifications of MAX1157BEUI+T

• 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
• Package / Case: TSSOP-28
• Maximum Power Dissipation: 1026 mW
• Minimum Operating Temperature: - 40 C
• Number Of Converters: 1
• Voltage Reference: 4.096 V

Figure 4. Equivalent Input Circuit
Figure 5. Selecting Standby Mode
powers down the reference and reference buffer after
completing a conversion. The reference and reference
buffer require a minimum of 12ms (C
C
The state of R/C during the second falling edge of CS
selects which power-down mode the MAX1157/
MAX1159/MAX1175 enters upon conversion comple-
tion. Holding R/C low causes the MAX1157/MAX1159/
MAX1175 to enter standby mode. The reference and
buffer are left on after the conversion completes. R/C
high causes the MAX1157/MAX1159/MAX1175 to enter
shutdown mode and power down the reference and
buffer after conversion (see Figures 5 and 6). Set the
voltage at REF high during the second falling edge of
CS to realize the lowest current operation.
REF
= 10µF) to power up and settle from shutdown.
AIN
R2
MAX1157
14-Bit, 135ksps, Single-Supply ADCs with
_______________________________________________________________________________________
R3
161Ω
3.4kΩ
TRACK
EOC
R/C
CS
HOLD
S1
REFADJ
TRACK
C
30pF
HOLD
ACQUISITION
S1, S2 = T/H SWITCH
S3 = POWER-DOWN
(MAX1159/MAX1175
ONLY)
= 0.1µF,
S2
HOLD
Bipolar Analog Input Range
T/H OUT
CONVERSION
While in standby mode, the supply current is less than
3.7mA (typ). The next falling edge of CS with R/C low
causes the MAX1157/MAX1159/MAX1175 to exit stand-
by mode and begin acquisition. The reference and ref-
erence buffer remain active to allow quick turn-on time.
AIN
R2 = 7.85kΩ (MAX1159)
OR 3.92kΩ (MAX1157/MAX1175)
R3 = 5.45kΩ (MAX1159)
OR 17.79kΩ (MAX1157/MAX1175)
MAX1159/MAX1175
R2
R3
DATA
161Ω
OUT
POWER-
DOWN
S3
3.4kΩ
TRACK
HOLD
S1
REF
TRACK
C
30pF
HOLD
Standby Mode
S2
HOLD
T/H OUT
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