www.docs.chipfind.ru
General Description
The MAX1082/MAX1083 10-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
MAX1082 operates from a single +4.5V to +5.5V supply;
the MAX1083 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 SPITM/QSPITM
and MICROWIRETM devices without external logic. A serial
strobe output allows direct connection to TMS320-family
digital signal processors. The MAX1082/ MAX1083 use an
external serial-interface clock to perform successive-
approximation analog-to-digital conversions. The devices
feature an internal +2.5V reference and a reference-buffer
amplifier with a 1.5% voltage-adjustment range. An
external reference with a 1V to V
DD
range may also be
used.
The MAX1082/MAX1083 provide a hard-wired 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 shut down automatically 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 MAX1082/MAX1083 are available in 16-pin TSSOP
packages.
Applications
Portable Data Logging
Data Acquisition
Medical Instruments
Battery-Powered Instruments
Pen Digitizers
Process Control
Features
o 4-Channel Single-Ended or 2-Channel
Pseudo-Differential Inputs
o Internal Multiplexer and Track/Hold
o Single-Supply Operation
+4.5V to +5.5V (MAX1082)
+2.7V to +3.6V (MAX1083)
o Internal +2.5V Reference
o 400kHz Sampling Rate (MAX1082)
o Low Power: 2.5mA (400ksps)
1.3mA (REDP)
0.9mA (FASTPD)
2A (FULLPD)
o SPI/QSPI/MICROWIRE/TMS320-Compatible 4-Wire
Serial Interface
o Software-Configurable Unipolar or Bipolar Inputs
o 16-Pin TSSOP Package
MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-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
CS
DIN
SSTRB
DOUT
GND
REFADJ
TOP VIEW
MAX1082
MAX1083
TSSOP
CH0
CH1
COM
CH2
CH3
SHDN
REF
19-1690 Rev 0; 5/00
PART
MAX1082ACUE
MAX1082BCUE
MAX1082AEUE
-40C to +85C
0C to +70C
0C to +70C
TEMP.
RANGE
PIN-
PACKAGE
16 TSSOP
16 TSSOP
16 TSSOP
Typical Operating Circuit appears at end of data sheet.
Pin Configuration
INL
(LSB)
1/2
1
1/2
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
Ordering Information continued at end of data sheet.
Ordering Information
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MAX1082
(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
= +25C.)
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
DD_
to V
DD2
....................................................... -0.3V to +0.3V
CH0CH3, 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
= +70C)
16-Pin TSSOP (derate 6.7mW/C above +70C) ........ 533mW
Operating Temperature Ranges
MAX1082_C_E/MAX1083_CUE ......................... 0C to +70C
MAX1082_E_E/MAX1083_EUE ....................... -40C to +85C
Storage Temperature Range ............................ -60C to +150C
Lead Temperature (soldering, 10s) ................................ +300C
MAX1082A
SINAD > 58dB
-3dB point
200kHz, V
IN
= 2.5Vp-p
f
IN1
= 99kHz, f
IN2
=102kHz
MAX1083B
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
s
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
IMD
Intermodulation Distortion
dB
70
SFDR
Spurious-Free Dynamic Range
dB
-70
THD
Total Harmonic Distortion
LSB
0.5
INL
Relative Accuracy (Note 2)
bits
10
Resolution
dB
60
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
DNL
Differential Nonlinearity
LSB
3.0
Offset Error
LSB
3.0
Gain Error (Note 3)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
%
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
mA
MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--MAX1082 (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
= +25C.)
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
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
= +25C
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
F
0.01
10
Capacitive Bypass at REFADJ
F
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
pF
18
Input Capacitance
A
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)
pF
C
IN
Input Capacitance
A
1
I
IN
Input Leakage
V
0.2
V
HYST
Input Hysteresis
V
0.8
V
INL
Input Low Voltage
V
3.0
V
INH
Input High Voltage
5
320
A
200
350
REF Input Current
V
1.0
V
DD1
+
50mV
REF Input Voltage Range
I
SINK
= 5mA
V
0.4
V
OL
Output Voltage Low
15
I
SOURCE
= 1mA
V
4
V
OH
Output Voltage High
CS = V
DD2
A
10
I
L
Three-State Leakage Current
CS = V
DD2
pF
15
C
OUT
Three-State Output Capacitance
ANALOG INPUTS (CH3CH0, COM)
EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF)
INTERNAL REFERENCE
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
DIGITAL OUTPUTS (DOUT, SSTRB)
MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
4
_______________________________________________________________________________________
V
DD1
=
V
DD2
=
5.5V
V
DD1
= V
DD2
= 5V 10%, midscale input
CONDITIONS
mA
2.5
4.0
IV
DD1
+ IV
DD2
Supply Current
V
4.5
5.5
V
DD1,
V
DD2
Positive Supply Voltage
(Note 9)
1.3
2.0
0.9
1.5
A
2.0
10
mV
0.5
2.0
PSR
Power-Supply Rejection
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Normal operating mode (Note 10)
Reduced-power mode (Note 11)
Fast power-down mode (Note 11)
Full power-down mode (Note 11)
ELECTRICAL CHARACTERISTICS--MAX1082 (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
= +25C.)
ELECTRICAL CHARACTERISTICS--MAX1083
(V
DD1
= V
DD2
= +2.7V to +3.6V, COM = GND, f
OSC
= 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external
+2.5V at REF, REFADJ = V
DD1
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
MAX1083A
SINAD > 58dB
-3dB point
f = 150kHz, V
IN
= 2.5Vp-p
f
IN1
= 73kHz, f
IN2
=77kHz
MAX1083B
No missing codes over temperature
Up to the 5th harmonic
CONDITIONS
kHz
250
Full-Linear Bandwidth
MHz
3
Full-Power Bandwidth
dB
-78
Channel-to-Channel Crosstalk
(Note 4)
dB
76
IMD
Intermodulation Distortion
dB
70
SFDR
Spurious-Free Dynamic Range
dB
-70
THD
Total Harmonic Distortion
LSB
0.5
INL
Relative Accuracy (Note 2)
bits
10
Resolution
dB
60
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
DNL
Differential Nonlinearity
LSB
3.0
Offset Error
LSB
3.0
Gain Error (Note 3)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
POWER SUPPLY
DC ACCURACY (Note 1)
DYNAMIC SPECIFICATIONS (75kHz sine wave input, 2.5Vp-p, 300 ksps, 4.8 MHz clock, bipolar input mode)
MAX1082/MAX1083
300ksps/400ksps, Single-Supply, 4-Channel,
Serial 10-Bit ADCs with Internal Reference
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS--MAX1083 (continued)
(V
DD1
= V
DD2
= +2.7V to +3.6V, COM = GND, f
OSC
= 4.8MHz, 50% duty cycle, 16 clocks/conversion cycle (300ksps), external
+2.5V at REF, REFADJ = V
DD1
, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
Normal operating mode
Normal operating mode
Normal operating mode
CONDITIONS
MHz
0.5
4.8
f
SCLK
Serial Clock Frequency
ps
<50
Aperture Jitter
ns
10
Aperture Delay
ns
625
t
ACQ
Track/Hold Acquisition Time
s
3.3
t
CONV
Conversion Time (Note 5)
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
To power down the internal reference
For small adjustments, from 1.22V
0 to 0.75mA output load
On/off leakage current, V
CH_
= 0 or V
DD1
T
A
= +25C
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
REFADJ Buffer Disable
Threshold
mV
100
REFADJ Input Range
V
1.22
REFADJ Output Voltage
F
0.01
10
Capacitive Bypass at REFADJ
F
4.7
10
Capacitive Bypass at REF
mV/mA
0.1
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
pF
18
Input Capacitance
A
0.001
1
Multiplexer Leakage Current
V
REF
/2
%
40
60
Duty Cycle
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)
pF
15
C
IN
Input Capacitance
A
1
I
IN
Input Leakage
V
0.2
V
HYST
Input Hysteresis
V
0.8
V
INL
Input Low Voltage
V
2.0
V
INH
Input High Voltage
5
REF Input Current
320
A
200
350
V
1.0
V
DD1
+
50mV
REF Input Voltage Range
V/V
+2.05
Buffer Voltage Gain
CONVERSION RATE
ANALOG INPUTS (CH3CH0, COM)
INTERNAL REFERENCE
EXTERNAL REFERENCE (reference buffer disabled, reference applied to REF)
DIGITAL INPUTS (DIN, SCLK, CS, SHDN)
PDF 
ZIP