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MAX1240ACSA+T

P1-P3P4-P6P7-P9P10-P12P13-P15
__________________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 (V
DD
= 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 V
REF
, 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.
Applications
Battery-Powered Systems
Portable Data Logging
Isolated Data Acquisition
Process Control
Instrumentation
________________________________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
MAX1240/MAX1241
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
________________________________________________________________ Maxim Integrated Products 1
19-1155; Rev 5; 8/10
SPI and QSPI are trademarks of Motorola, Inc. MICROWIRE is a trademark of National Semiconductor Corp.
Ordering Information continued at end of data sheet.
TOP VIEW
1
2
3
4
8
7
6
5
SCLK
CS
DOUT
GND
REF
SHDN
AIN
V
DD
PDIP/SO
MAX1240
MAX1241
Pin Configuration
Ordering Information
EVALUATION KIT
AVAILABLE
Functional Diagram
7
AIN
T/H
DOUT
6
1
OUTPUT
SHIFT
REGISTER
CONTROL
LOGIC
INT
CLOCK
12-BIT
SAR
8
2
3
5
REF
4
SHDN
2.5V REFERENCE
(MAX1240 ONLY)
GND
SCLK
CS
MAX1240
MAX1241
V
DD
*Dice are specified at T
A
= +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.
PART*
TEMP RANGE
PIN -
PA C K A G E
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+
0°C to +70°C
8 SO ±1
MAX1240CCSA+
0°C to +70°C
8 SO ±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 ±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.
MAX1240/MAX1241
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
2 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V (MAX1240); V
DD
= +2.7V to +5.25V (MAX1241); 73ksps, f
S
CLK
= 2.1MHz (50% duty cycle); MAX1240—4.7µF
capacitor at REF pin, MAX1241—external reference; V
REF
= 2.500V applied to REF pin; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
V
DD
to GND .............................................................-0.3V to +6V
AIN to GND................................................-0.3V to (V
DD
+ 0.3V)
REF to GND ...............................................-0.3V to (V
DD
+ 0.3V)
Digital Inputs to GND...............................................-0.3V to +6V
DOUT to GND............................................-0.3V to (V
DD
+ 0.3V)
DOUT Current..................................................................±25mA
Continuous Power Dissipation (T
A
= +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
ABSOLUTE MAXIMUM RATINGS
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.
71.5MAX124_C
Input Voltage Range 0V
REF
V
Input Capacitance
Aperture Jitter <50 ps
16 pF
MAX124_A
MAX124_B/C
Aperture Delay t
APR
30 nsFigure 8
Track/Hold Acquisition Time t
ACQ
1.5 µs
Throughput Rate 73 kspsf
SCLK
= 2.1MHz
Conversion Time
PARAMETER SYMBOL MIN TYP MAX UNITS
±0.5 ±3.0
Offset Error LSB
Differential Nonlinearity DNL ±1 LSB
±1.0
Gain Temperature Coefficient
±0.5 ±4.0
Gain Error (Note 3) LSB±0.5 ±4.0
Resolution 12 Bits
Relative Accuracy (Note 2) INL
±0.5
LSB
t
CONV
5.5 7.5 µs
Small-Signal Bandwidth
Signal-to-Noise Plus
Distortion Ratio
SINAD
70
dB
2.25 MHz
Full-Power Bandwidth
Total Harmonic Distortion THD
-80
dB
1.0
-3dB rolloff
MHz
CONDITIONS
Spurious-Free Dynamic Range
ppm/°C
No missing codes over temperature
MAX124_B/C
±0.25
SFDR
MAX124_A/B
80
Up to the 5th harmonic
dB
MAX124_A/B
MAX124_A
MAX124_A/B
MAX124_C -88
MAX124_C 88
ANALOG INPUT
CONVERSION RATE
DYNAMIC SPECIFICATIONS (10kHz sine-wave input, 0V to 2.500Vp-p, 73ksps, f
SCLK
= 2.1MHz)
DC ACCURACY (Note 1)
ppm/°C
MAX1240/MAX1241
+2.7V, Low-Power,
12-Bit Serial ADCs in 8-Pin SO
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX1240); V
DD
= +2.7V to +5.25V (MAX1241); 73ksps, f
S
CLK
= 2.1MHz (50% duty cycle); MAX1240—4.7µF
capacitor at REF pin, MAX1241—external reference; V
REF
= 2.500V applied to REF pin; T
A
= T
MIN
to T
MAX
; unless otherwise noted.)
V
IN
= 0V or V
DD
µA
T
A
= +25°C
µA100 150
±0.01 ±1I
IN
SCLK, CS Input Leakage
V0.2
Input Current
CONDITIONS
V
SHDN
= 0V
µA±0.01 10
V
HYST
SCLK, CS Input Hysteresis
V
SHDN
= 0V or V
DD
µA
REF Input Current in Shutdown
kΩ18 25
±4.0
SHDN Input Current
Input Resistance
V0.4V
SL
SHDN Input Low Voltage
V
(Note 5)
V
DD
- 0.4V
SH
SHDN Input High Voltage
pF15C
IN
VREF Output Voltage
SCLK, CS Input Capacitance
SHDN = unconnected
nA
SHDN = unconnected
±100
SHDN Max Allowed Leakage,
Mid Input
VV
DD
/2V
FLT
SHDN Voltage, Unconnected
V1.1 V
DD
- 1.1V
SM
SHDN Input Mid Voltage
I
SINK
= 5mA
UNITSMIN TYP MAXSYMBOLPARAMETER
V
0.4
V
OL
Output Voltage Low
CS = V
DD
(Note 5)
pF15C
OUT
Three-State Output Capacitance
CS = V
DD
µA
I
SOURCE
= 0.5mA
±0.01 ±10I
L
Three-State Leakage Current
VV
DD
- 0.5V
OH
V
V
DD
≤ 3.6V
0.8V
IL
µF0.1Capacitive Bypass at REF
SCLK, CS Input Low Voltage
V
2.0
V
IH
SCLK, CS Input High Voltage
Output Voltage High
I
SINK
= 16mA
V
DD
> 3.6V (MAX1241)
0.8
3.0
2.480 2.500 2.520
VInput Voltage Range
1.00
V
DD
+
50mV
MAX1240AC/BC
ppm/°CREF Temperature Coefficient
±30 ±50
REF Short-Circuit Current 30
MAX1240AE/BE ±30 ±60
MAX1240AM/BM ±30 ±80
0mA to 0.2mA output loadLoad Regulation (Note 4) 0.35
mA
µFCapacitive Bypass at REF 4.7
MAX1240C ±30
DIGITAL OUTPUT: DOUT
DIGITAL INPUTS: SCLK,
CCSS
,
SSHHDDNN
EXTERNAL REFERENCE (V
REF
= 2.500V)
INTERNAL REFERENCE (MAX1240 only)
P1-P3P4-P6P7-P9P10-P12P13-P15

MAX1240ACSA+T

Mfr. #:
Buy MAX1240ACSA+T
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 73ksps 3.6V Precision ADC
Lifecycle:
New from this manufacturer.
Delivery:
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