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MAX1241 반도체 회로 부품 판매점

12-Bit Serial ADCs



Maxim Integrated 로고
Maxim Integrated
MAX1241 데이터시트, 핀배열, 회로
19-1155; Rev 5; 8/10
EVAALVUAAILTAIOBNLEKIT
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
__________________General Description
The MAX1240/MAX1241 low-power, 12-bit analog-to-
digital converters (ADCs) are available in 8-pin pack-
ages. The MAX1240 operates with a single +2.7V to
+3.6V supply, and the MAX1241 operates with a single
+2.7V to +5.25V supply. Both devices feature a 7.5µs
successive-approximation ADC, a fast track/hold
(1.5µs), an on-chip clock, and a high-speed, 3-wire ser-
ial interface.
Power consumption is only 37mW (VDD = 3V) at the
73ksps maximum sampling speed. A 2µA shutdown
mode reduces power at slower throughput rates.
The MAX1240 has an internal 2.5V reference, while the
MAX1241 requires an external reference. The MAX1241
accepts signals from 0V to VREF, and the reference
input range includes the positive supply rail. An exter-
nal clock accesses data from the 3-wire interface,
which connects directly to standard microcontroller I/O
ports. The interface is compatible with SPI™, QSPI™,
and MICROWIRE™.
Excellent AC characteristics and very low power com-
bined with ease of use and small package size make
these converters ideal for remote-sensor and data-
acquisition applications, or for other circuits with
demanding power consumption and space require-
ments. The MAX1240/MAX1241 are available in 8-pin
PDIP and SO packages.
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process Control
Instrumentation
Applications
Pin Configuration
________________________________Features
Single-Supply Operation:
+2.7V to +3.6V (MAX1240)
+2.7V to +5.25V (MAX1241)
12-Bit Resolution
Internal 2.5V Reference (MAX1240)
Small Footprint: 8-Pin PDIP/SO Packages
Low Power: 3.7µW (73ksps, MAX1240)
3mW (73ksps, MAX1241)
66µW (1ksps, MAX1241)
5µW (power-down mode)
Internal Track/Hold
SPI/QSPI/MICROWIRE 3-Wire Serial Interface
Internal Clock
Ordering Information
PART*
TEMP RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1240ACPA+
0°C to +70°C 8 PDIP
±1/2
MAX1240BCPA+
0°C to +70°C 8 PDIP
±1
MAX1240CCPA+
0°C to +70°C 8 PDIP
±1
MAX1240ACSA+
0°C to +70°C 8 SO
±1/2
MAX1240BCSA+
MAX1240CCSA+
0°C to +70°C 8 SO
0°C to +70°C 8 SO
±1
±1
MAX1240CC/D
0°C to +70°C Dice*
±1
MAX1240AESA/V+** -40°C to +85°C 8 SO
±1/2
MAX1240BESA/V+ -40°C to +85°C 8 SO
Ordering Information continued at end of data sheet.
*Dice are specified at TA = +25°C, DC parameters only.
**Future product—contact factory for availability.
/V denotes an automotive qualified part.
+Denotes a lead(Pb)-free/RoHS-compliant package.
±1
Functional Diagram
CS
SCLK
7
8
VDD
1
TOP VIEW
SHDN 3
CONTROL
LOGIC
INT
CLOCK
VDD 1
8 SCLK
AIN 2
SHDN 3
REF 4
MAX1240
MAX1241
7 CS
6 DOUT
5 GND
PDIP/SO
AIN 2
T/H
4
REF
2.5V REFERENCE
(MAX1240 ONLY)
12-BIT
SAR
5
GND
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
OUTPUT
SHIFT
REGISTER
MAX1240
MAX1241
6
DOUT
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.


MAX1241 데이터시트, 핀배열, 회로
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
ABSOLUTE MAXIMUM RATINGS
VDD to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (VDD + 0.3V)
REF to GND ...............................................-0.3V to (VDD + 0.3V)
Digital Inputs to GND...............................................-0.3V to +6V
DOUT to GND............................................-0.3V to (VDD + 0.3V)
DOUT Current ..................................................................±25mA
Continuous Power Dissipation (TA = +70°C)
Plastic DIP (derate 9.09mW/°C above +70°C) ...........727mW
SO (derate 5.88mW/°C above +70°C)........................471mW
CERDIP (derate 8.00mW/°C above +70°C)................640mW
Operating Temperature Ranges
MAX1240_C_A/MAX1241_C_A .........................0°C to +70°C
MAX1240_E_ A/MAX1241_E_ A .....................-40°C to +85°C
MAX1240_MJA/MAX1241_MJA ...................-55°C to +125°C
Storage Temperature Range............................-60°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
Soldering Temperature (reflow)
PDIP, SO .....................................................................+260°C
CDIP ...........................................................................+250°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +3.6V (MAX1240); VDD = +2.7V to +5.25V (MAX1241); 73ksps, fSCLK = 2.1MHz (50% duty cycle); MAX1240—4.7µF
capacitor at REF pin, MAX1241—external reference; VREF = 2.500V applied to REF pin; TA = TMIN to TMAX; unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
MIN
DC ACCURACY (Note 1)
Resolution
12
Relative Accuracy (Note 2)
MAX124_A
INL
MAX124_B/C
Differential Nonlinearity
DNL No missing codes over temperature
Offset Error
MAX124_A
MAX124_B/C
Gain Error (Note 3)
Gain Temperature Coefficient
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 73ksps, fSCLK = 2.1MHz)
Signal-to-Noise Plus
Distortion Ratio
MAX124_A/B
SINAD
MAX124_C
70
Total Harmonic Distortion
THD
MAX124_A/B
Up to the 5th harmonic
MAX124_C
Spurious-Free Dynamic Range
SFDR
MAX124_A/B
MAX124_C
80
Small-Signal Bandwidth
-3dB rolloff
Full-Power Bandwidth
CONVERSION RATE
Conversion Time
tCONV
5.5
Track/Hold Acquisition Time
tACQ
Throughput Rate
fSCLK = 2.1MHz
Aperture Delay
tAPR Figure 8
Aperture Jitter
ANALOG INPUT
Input Voltage Range
0
Input Capacitance
TYP MAX
±0.5
±0.5
±0.5
±0.25
±0.5
±1.0
±1
±3.0
±4.0
±4.0
71.5
-80
-88
88
2.25
1.0
7.5
1.5
73
30
<50
VREF
16
UNITS
Bits
LSB
LSB
LSB
LSB
ppm/°C
dB
dB
dB
MHz
MHz
µs
µs
ksps
ns
ps
V
pF
2 _______________________________________________________________________________________




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