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MAX1229BEEP+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22
MAX1227/MAX1229/MAX1231
-0.3
-0.1
-0.2
0.1
0
0.2
0.3
2.7 3.0 3.3 3.6
OFFSET ERROR
vs. SUPPLY VOLTAGE
MAX1227/29/31 toc12
SUPPLY VOLTAGE (V)
OFFSET ERROR (LSB)
-0.3
0
-0.1
-0.2
0.2
0.1
0.3
0.4
-40 10-15 35 60 85
OFFSET ERROR
vs. TEMPERATURE
MAX1227/29/31 toc13
TEMPERATURE (
°
C)
OFFSET ERROR (LSB)
0
1.0
0.5
1.5
2.0
GAIN ERROR vs. SUPPLY VOLTAGE
MAX1227/29/31 toc14
SUPPLY VOLTAGE (V)
GAIN ERROR (LSB)
2.7 3.6
3.33.0
0
0.5
1.5
1.0
2.0
GAIN ERROR vs. TEMPERATURE
MAX1227/29/31 toc15
TEMPERATURE (
°
C)
GAIN ERROR (LSB)
-40 -15 35 85
6010
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
_______________________________________________________________________________________
7
Typical Operating Characteristics (continued)
(V
DD
= +3V, V
REF
= +2.5V, f
SCLK
= 4.8MHz, C
LOAD
= 30pF, T
A
= +25°C, unless otherwise noted.)
-1.00
-0.50
0.50
0.25
-0.25
-0.75
0
1.00
0.75
TEMPERATURE SENSOR ERROR
vs. TEMPERATURE
MAX1227/29/31 toc16
TEMPERATURE (°C)
TEMPERATURE SENSOR ERROR (°C)
-40 -15 35 85
6010
GRADE B
-5
-3
-4
-1
-2
0
1
0426810
SAMPLING ERROR
vs. SOURCE IMPEDANCE
MAX1227/29/31 toc17
SOURCE IMPEDANCE (kΩ)
SAMPLING ERROR (LSB)
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
8 _______________________________________________________________________________________
Pin Description
PIN
MAX1231
TQFN-EP
MAX1231
QSOP
MAX1229 MAX1227
NAME FUNCTION
2–12, 26,
27, 28,
1–14 — — AIN0–13 Analog Inputs
— — 1–10 — AIN0–9 Analog Inputs
— — — 1–6 AIN0–5 Analog Inputs
13 15 — — REF-/AIN14
N eg ati ve Inp ut for E xter nal D i ffer enti al Refer ence/Anal og Inp ut 14.
See Table 3 for details on programming the setup register.
— — 11 — REF-/AIN10
N eg ati ve Inp ut for E xter nal D i ffer enti al Refer ence/Anal og Inp ut 10.
See Table 3 for details on programming the setup register.
— — — 7 REF-/AIN6
Negative Input for External Differential Reference/Analog Input 6.
See Table 3 for details on programming the setup register.
14 16 — —
CNVST/
AIN15
Active-Low Conversion Start Input/Analog Input 15. See Table 3 for
details on programming the setup register.
— — 12 —
CNVST/
AIN11
Active-Low Conversion Start Input/Analog Input 11. See Table 3 for
details on programming the setup register.
——— 8
CNVST/
AIN7
Active-Low Conversion Start Input/Analog Input 7. See Table 3 for
details on programming the setup register.
15 17 13 9 REF+ Positive Reference Input. Bypass to GND with a 0.1µF capacitor.
16 18 14 10 GND Ground
18 19 15 11 V
DD
Power Input. Bypass to GND with a 0.1µF capacitor.
20 20 16 12 SCLK
Serial Clock Input. Clocks data in and out of the serial interface.
(Duty cycle must be 40% to 60%.) See Table 3 for details on
programming the clock mode.
21 21 17 13 CS
Active-Low Chip Select Input. When CS is low, the serial interface
is enabled. When CS is high, DOUT is high impedance.
22 22 18 14 DIN
Serial Data Input. DIN data is latched into the serial interface on the
rising edge of SCLK.
23 23 19 15 DOUT
Serial Data Output. Data is clocked out on the falling edge of
SCLK. High impedance when CS is connected to V
DD
.
24 24 20 16 EOC End of Conversion Output. Data is valid after EOC pulls low.
1, 17, 19,
25
— — — N.C. No Connection. Not internally connected.
— — — — EP Exposed Pad (TQFN Only). Connect to GND.
MAX1227/MAX1229/MAX1231
12-Bit 300ksps ADCs with FIFO,
Temp Sensor, Internal Reference
_______________________________________________________________________________________ 9
Detailed Description
The MAX1227/MAX1229/MAX1231 are low-power, seri-
al-output, multichannel ADCs with temperature-sensing
capability for temperature-control, process-control, and
monitoring applications. These 12-bit ADCs have inter-
nal track and hold (T/H) circuitry that supports single-
ended and fully differential inputs. Data is converted
from an internal temperature sensor or analog voltage
sources in a variety of channel and data-acquisition
configurations. Microprocessor (µP) control is made
easy through a 3-wire SPI-/QSPI/ MICROWIRE-compati-
ble serial interface.
Figure 2 shows a simplified functional diagram of the
MAX1227/MAX1229/MAX1231 internal architecture.
The MAX1227 has eight single-ended analog input
channels or four differential channels. The MAX1229
has 12 single-ended analog input channels or six differ-
ential channels. The MAX1231 has 16 single-ended
analog input channels or eight differential channels.
SCLK
DIN
DOUT
CS
t
DH
t
DOE
t
DS
t
CH
t
CSS0
t
CP
t
CSH1
t
CSH0
t
CSS1
t
DOD
t
DOT
Figure 1. Detailed Serial-Interface Timing Diagram
12-BIT
SAR
ADC
CONTROL
SERIAL
INTERFACE
OSCILLATOR
FIFO AND
ACCUMULATOR
T/H
TEMP
SENSE
REF-
CNVST
SCLK
CS
DIN
EOC
DOUT
AIN15
AIN1
AIN2
INTERNAL
REFERENCE
REF+
MAX1227
MAX1229
MAX1231
Figure 2. Functional Diagram
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P22

MAX1229BEEP+T

Mfr. #:
Buy MAX1229BEEP+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 12Ch 300ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
Delivery:
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