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MAX1282BCUE+

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
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MAX1282/MAX1283
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
________________________________________________________________ Maxim Integrated Products 1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
V
DD1
V
DD2
SCLK
DIN
SSTRB
CS
DOUT
GND
REFADJ
TOP VIEW
MAX1282/
MAX1283
TSSOP
CH0
CH1
COM
CH2
CH3
SHDN
REF
19-1688; Rev 0; 5/00
Typical Operating Circuit appears at end of data sheet.
Pin Configuration
Ordering Information
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
General Description
The MAX1282/MAX1283 12-bit analog-to-digital convert-
ers (ADCs) combine a 4-channel analog-input multiplexer,
high-bandwidth track/hold (T/H), and serial interface with
high conversion speed and low power consumption. The
MAX1282 operates from a single +4.5V to +5.5V supply;
the MAX1283 operates from a single +2.7V to +3.6V sup-
ply. Both devices’ analog inputs are software configurable
for unipolar/bipolar and single-ended/pseudo-differential
operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™/MICROWIRE™ devices without external
logic. A serial strobe output allows direct connection to
TMS320-family digital signal processors. The MAX1282/
MAX1283 use an external serial-interface clock to perform
successive-approximation analog-to-digital conversions.
The devices feature an internal +2.5V reference and a ref-
erence-buffer amplifier with a ±1.5% voltage-adjustment
range. An external reference with a 1V to V
DD
range may
also be used.
The MAX1282/MAX1283 provide a hardwired SHDN pin
and four software-selectable power modes (normal opera-
tion, reduced power (REDP), fast power-down (FASTPD),
and full power-down (FULLPD)). These devices can be
programmed to automatically shut down at the end of a
conversion or to operate with reduced power. When using
the power-down modes, accessing the serial interface
automatically powers up the devices, and the quick turn-
on time allows them to be shut down between all conver-
sions.
The MAX1282/MAX1283 are available in 16-pin TSSOP
packages.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Features
♦ 4-Channel Single-Ended or 2-Channel
Pseudo-Differential Inputs
♦ Internal Multiplexer and Track/Hold
♦ Single-Supply Operation
+4.5V to +5.5V (MAX1282)
+2.7V to +3.6V (MAX1283)
♦ Internal +2.5V Reference
♦ 400kHz Sampling Rate (MAX1282)
♦ Low Power: 2.5mA (400ksps)
1.3mA (REDP)
0.9mA (FASTPD)
2µA (FULLPD)
♦ SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
♦ Software-Configurable Unipolar or Bipolar Inputs
♦ 16-Pin TSSOP Package
±116 TSSOP0°C to +70°C
MAX1283BCUE
±116 TSSOP-40°C to +85°CMAX1283BEUE
±116 TSSOP-40°C to +85°CMAX1282BEUE
INL
(LSB)
PIN-
PACKAGE
TEMP.
RANGE
PART
±116 TSSOP0°C to +70°C
MAX1282BCUE
EVALUATION KIT
AVAILABLE
MAX1282/MAX1283
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS—MAX1282
(V
DD1
= V
DD2
= +4.5V to +5.5V, COM = GND, f
OSC
= 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external
+2.5V at REF, REFADJ = V
DD1
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°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.
V
DD
_ to GND ........................................................... -0.3V to +6V
V
DD1
to V
DD2
....................................................... -0.3V to +0.3V
CH0–CH3, COM to GND .......................... -0.3V to (V
DD
_ +0.3V)
REF, REFADJ to GND................................ -0.3V to V
DD
_ +0.3V)
Digital Inputs to GND .............................................. -0.3V to +6V
Digital Outputs to GND............................. -0.3V to (V
DD
_ +0.3V)
Digital Output Sink Current .................................................25mA
Continuous Power Dissipation (T
A
= +70°C)
16-Pin TSSOP (derate 6.7mW/°C above +70°C) ........ 535mW
Operating Temperature Ranges
MAX1282BCUE/MAX1283BCUE ....................... 0°C to +70°C
MAX1282BEUE/MAX1283BEUE..................... -40°C to +85°C
Storage Temperature Range ............................ -60°C to +150°C
Lead Temperature (soldering, 10s) ................................ +300°C
SINAD > 68dB
-3dB point
200kHz, V
IN
= 2.5Vp-p
f
IN1
= 99kHz, f
IN2
=102kHz
No missing codes over temperature
Up to the 5th harmonic
CONDITIONS
MHz
0.5 6.4
f
SCLK
Serial Clock Frequency
ps
<50
Aperture Jitter
ns
10
Aperture Delay
ns
400
t
ACQ
Track/Hold Acquisition Time
µs
2.5
t
CONV
Conversion Time (Note 5)
kHz
350
Full-Linear Bandwidth
MHz
6
Full-Power Bandwidth
dB
-78
Channel-to-Channel Crosstalk
(Note 4)
dB
76
IMDIntermodulation Distortion
dB
80
SFDRSpurious-Free Dynamic Range
dB
-81
THDTotal Harmonic Distortion
Bits
12
Resolution
dB
70
SINAD
Signal-to-Noise plus Distortion
Ratio
LSB
±0.2
Channel-to-Channel Offset-Error
Matching
ppm/°C
±1.6
Gain-Error Temperature
Coefficient
±1.0
LSB
±1.0
DNLDifferential Nonlinearity
LSB
±6.0
Offset Error
LSB
±6.0
Gain Error (Note 3)
UNITSMIN TYP MAXSYMBOLPARAMETER
%
40 60
Duty Cycle
DYNAMIC SPECIFICATIONS (100kHz sine-wave input, 2.5Vp-p, 400ksps, 6.4MHz clock, bipolar input mode)
DC ACCURACY (Note 1)
CONVERSION RATE
LSBINLRelative Accuracy (Note 2)
MAX1282/MAX1283
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 12-Bit ADCs with Internal Reference
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS—MAX1282 (continued)
(V
DD1
= V
DD2
= +4.5V to +5.5V, COM = GND, f
OSC
= 6.4MHz, 50% duty cycle, 16 clocks/conversion cycle (400ksps), external
+2.5V at REF, REFADJ = V
DD1
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS UNITSMIN TYP MAXSYMBOLPARAMETER
To power down the internal reference
For small adjustments, from 1.22V
0 to 1mA output load
On/off leakage current, V
COM
, V
CH_
= 0 or
V
DD1
T
A
= +25°C
Bipolar, V
COM
or V
CH_
= V
REF
/2, referenced
to COM or CH_
Unipolar, V
COM
= 0
V/V
+2.05
Buffer Voltage Gain
V
1.4 V
DD1
- 1.0
REFADJ Buffer Disable
Threshold
mV
±100
REFADJ Input Range
V
1.22
REFADJ Output Voltage
µF
0.01 10
Capacitive Bypass at REFADJ
µF
4.7 10
Capacitive Bypass at REF
mV/mA
0.05 2.0
Load Regulation (Note 7)
ppm/°C
±15
TC V
REF
REF Output Temperature
Coefficient
mA
15
REF Short-Circuit Current
V
2.480 2.500 2.520
V
REF
REF Output Voltage
pF18Input Capacitance
µA
±0.001 ±1
Multiplexer Leakage Current
±V
REF
/2
V
V
REF
V
CH_
Input Voltage Range, Single-
Ended and Differential (Note 6)
V
IN
= 0 or V
DD2
In full power-down mode, f
SCLK
= 0
V
REF
= 2.500V, f
SCLK
= 0
V
REF
= 2.500V, f
SCLK
= f
MAX
(Note 8)
pFC
IN
Input Capacitance
µA±1I
IN
Input Leakage
V0.2V
HYST
Input Hysteresis
V0.8V
INL
Input Low Voltage
V3.0V
INH
Input High Voltage
5
320 µA
200 350
REF Input Current
V
1.0 V
DD1
+
50mV
REF Input Voltage Range
I
SINK
= 5mA V0.4V
OL
Output Voltage Low
15
I
SOURCE
= 1mA V4V
OH
Output Voltage High
CS = V
DD2
µA±10I
L
Three-State Leakage Current
CS = V
DD2
pF15C
OUT
Three-State Output Capacitance
ANALOG INPUTS (CH3–CH0, COM)
EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF)
INTERNAL REFERENCE
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
DIGITAL OUTPUTS (DOUT, SSTRB)
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MAX1282BCUE+

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Buy MAX1282BCUE+
Manufacturer:
Maxim Integrated
Description:
Analog to Digital Converters - ADC 12-Bit 4Ch 400ksps 5.5V Precision ADC
Lifecycle:
New from this manufacturer.
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