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General Description
The MAX1167/MAX1168 low-power, multichannel, 16-
bit analog-to-digital converters (ADCs) feature a suc-
cessive-approximation ADC, integrated +4.096V
reference, a reference buffer, an internal oscillator,
automatic power-down, and a high-speed SPITM/
QSPITM/MICROWIRETM-compatible interface. The
MAX1167/MAX1168 operate with a single +5V analog
supply and feature a separate digital supply, allowing
direct interfacing with +2.7V to +5.5V digital logic.
The MAX1167/MAX1168 consume only 2.9mA (AV
DD
=
DV
DD
= +5V) at 200ksps when using an external reference.
AutoShutdownTM reduces the supply current to 145A at
10ksps and to less than 10A at reduced sampling rates.
The MAX1167 includes a 4-channel input multiplexer, and
the MAX1168 accepts up to eight analog inputs.
In addition, digital signal processor (DSP)-initiated con-
versions are simplified with the DSP frame-sync input and
output featured in the MAX1168. The MAX1168 includes
a data-bit transfer input to select between 8-bit-wide or
16-bit-wide data-transfer modes. Both devices feature a
scan mode that converts each channel sequentially or
one channel continuously.
Excellent dynamic performance and low power, com-
bined with ease of use and an integrated reference, make
the MAX1167/MAX1168 ideal for control and data-acqui-
sition operations or for other applications with demanding
power consumption and space requirements. The
MAX1167 is available in a 16-pin QSOP package and the
MAX1168 is available in a 24-pin QSOP package. Both
devices are guaranteed over the commercial (0C to
+70C) and extended (-40C to +85C) temperature
ranges. Use the MAX1168 evaluation kit to evaluate the
MAX1168.
Applications
Motor Control
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Thermocouple Measurements
Accelerometer Measurements
Features
o 16-Bit Resolution, 1 LSB DNL (max)
o +5V Single-Supply Operation
o Adjustable Logic Level (+2.7V to +5.25V)
o Input Voltage Range: 0 to V
REF
o Internal (+4.096V) or External (+3.8V to AV
DD
)
Reference
o Internal Track/Hold, 4MHz Input Bandwidth
o Internal or External Clock
o SPI/QSPI/MICROWIRE-Compatible Serial
Interface, MAX1168 Performs DSP-Initiated
Conversions
o 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode
(MAX1168 Only)
o 4-Channel (MAX1167) or 8-Channel (MAX1168)
Input Mux
Scan Mode Sequentially Converts Multiple
Channels or One Channel Continuously
o Low Power
2.9mA at 200ksps
1.45mA at 100ksps
145A at 10ksps
0.6A in Full Power-Down Mode
o Small Package Size
16-Pin QSOP (MAX1167)
24-Pin QSOP (MAX1168)
MAX1167/MAX1168
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2956; Rev 0; 8/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
EVALUATION KIT
AVAILABLE
PART
TEMP RANGE
PIN-
PACKAGE
INL
(LSB)
MAX1167ACEE
0C to +70C
16 QSOP
1.2
MAX1167BCEE
0C to +70C
16 QSOP
2
MAX1167CCEE
0C to +70C
16 QSOP
3
MAX1167AEEE*
-40C to +85C
16 QSOP
1.2
MAX1167BEEE*
-40C to +85C
16 QSOP
2
MAX1167CEEE*
-40C to +85C
16 QSOP
3
Ordering Information continued at end of data sheet.
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
AutoShutdown is a trademark of Maxim Integrated Products, Inc.
Pin Configurations appear at end of data sheet.
*Future product--contact factory for availability.
MAX1167/MAX1168
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
2
_______________________________________________________________________________________
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.
AV
DD
to AGND .........................................................-0.3V to +6V
DV
DD
to DGND.........................................................-0.3V to +6V
DGND to AGND.....................................................-0.3V to +0.3V
AIN_, REF, REFCAP to AGND..................-0.3V to (AV
DD
+ 0.3V)
SCLK, CS, DSEL, DSPR, DIN to DGND ...................-0.3V to +6V
DOUT, DSPX, EOC to DGND...................-0.3V to (DV
DD
+ 0.3V)
Maximum Current into Any Pin............................................50mA
Continuous Power Dissipation (T
A
= +70C)
16-Pin QSOP (derate 8.3mW/C above +70C)...........667mW
24-Pin QSOP (derate 9.5mW/C above +70C)...........762mW
Operating Temperature Ranges
MAX116_ _ CE_ ..................................................0C to +70C
MAX116_ _ EE_ ...............................................-40C to +85C
Maximum Junction Temperature .....................................+150C
Storage Temperature Range .............................-65C to +150C
Lead Temperature (soldering, 10s) .................................+300C
ELECTRICAL CHARACTERISTICS
(AV
DD
= DV
DD
= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY (Note 1)
Resolution
16
Bits
MAX116_A
1.5
2
MAX116_B
2.0
3
Relative Accuracy (Note 2)
INL
MAX116_C
3.0
6
LSB
MAX116_A
(16 bit, no missing codes over temperature)
1
+1.75
MAX116_B
(16 bit, no missing codes over temperature)
-1.0
Differential Nonlinearity
DNL
MAX116_C
(15 bit, no missing codes over temperature)
2
LSB
External reference
0.7
Transition Noise
RMS
noise
Internal reference
0.8
LSB
RMS
Offset Error
0.1
10
mV
Gain Error
(Note 3)
0.01
0.2
%FSR
Offset Drift
1
ppm/C
Gain Drift
(Note 3)
1.2
ppm/C
DYNAMIC SPECIFICATIONS (1kHz sine wave, 4.096V
P-P
) (Note 1)
Signal-to-Noise Plus Distortion
SINAD
86
88.5
dB
Signal-to-Noise Ratio
SNR
86
88.5
dB
Total Harmonic Distortion
THD
-100
-90
dB
Spurious-Free Dynamic Range
SFDR
92
101
dB
Full-Power Bandwidth
-3dB point
4
MHz
Full-Linear Bandwidth
SINAD > 85dB
10
kHz
Channel-to-Channel Isolation
(Note 4)
96
dB
MAX1167/MAX1168
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
CONVERSION RATE
Internal clock, no data transfer,
single conversion (Note 5)
5.52
7.07
Conversion Time
t
CONV
External clock
3.75
s
Acquisition Time
t
ACQ
(Note 6)
729
ns
External clock, data transfer and conversion
0.1
4.8
Serial Clock Frequency
f
SCLK
External clock, data transfer only
9
MHz
Internal Clock Frequency
f
INTCLK
Internal clock
3.2
4.0
MHz
Aperture Delay
t
AD
15
ns
Aperture Jitter
t
AJ
<50
ps
8-bit-wide data-transfer mode
4.17
200.00
16-bit-wide data-transfer mode
3.125
150.00
Internal clock, single conversion, 8-bit-wide
data-transfer mode
89
Internal clock, single conversion, 16-bit-
wide data-transfer mode
68
Internal clock, scan mode, 8-bit-wide data-
transfer mode (four conversions)
103
Sample Rate (Note 7)
f
S
External clock, scan mode, 16-bit-wide
data-transfer mode (four conversions)
82
ksps
Duty Cycle
45
55
%
ANALOG INPUT (AIN_)
Input Range
V
AIN
_
0
V
REF
V
Input Capacitance
C
AIN
_
45
pF
EXTERNAL REFERENCE
Input Voltage Range
V
REF
3.8
AV
DD
V
V
AIN
_ = 0
110
SCLK idle
0.1
Input Current
I
REF
CS = DV
DD
, SCLK idle
0.1
A
INTERNAL REFERENCE
Reference Voltage
V
REFIN
4.056
4.096
4.136
V
Reference Short-Circuit Current
I
REFSC
13
mA
Reference Temperature
Coefficient
25
ppm/C
Reference Wake-Up Time
t
RWAKE
V
REF
= 0
5
ms
MAX1167/MAX1168
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DIGITAL INPUTS (SCLK,
CS, DSEL, DSPR, DIN) (DV
DD
= +2.7V to +5.25V)
Input High Voltage
V
IH
0.7
DV
DD
V
Input Low Voltage
V
IL
0.3
DV
DD
V
Input Leakage Current
I
IN
Digital inputs = 0 to DV
DD
0.1
1
A
Input Hysteresis
V
HYST
0.2
V
Input Capacitance
C
IN
15
pF
DIGITAL OUTPUT (DOUT, DSPX,
EOC) (DV
DD
= +2.7V to +5.25V)
Output High Voltage
V
OH
I
SOURCE
= 0.5mA
DV
DD
-
0.4
V
I
SINK
= 10mA, DV
DD
= +4.75V to +5.25V
0.8
Output Low Voltage
V
OL
I
SINK
= 1.6mA, DV
DD
= +2.7V to +5.25V
0.4
V
Tri-State Output Leakage Current
I
L
CS = DV
DD
0.1
10
A
Tri-State Output Capacitance
C
OUT
CS = DV
DD
15
pF
POWER SUPPLIES
Analog Supply
AV
DD
4.75
5.25
V
Digital Supply
DV
DD
2.70
5.25
V
External reference
2.0
2.9
200ksps
Internal reference
2.9
3.8
External reference
1.0
100ksps
Internal reference
2.0
External reference
0.1
10ksps
Internal reference
1.1
External reference
0.01
Analog Supply Current (Note 8)
I
AVDD
1ksps
Internal reference
1.01
mA
200ksps
0.87
1.3
100ksps
0.45
10ksps
0.045
Digital Supply Current
I
DVDD
DOUT =
all zeros
1ksps
0.005
mA
Internal reference and
reference buffer on
between conversions
1.01
Power-Down Supply Current
I
AVDD
+
I
DVDD
CS = DV
DD
,
SCLK = 0,
DIN = 0,
DSPR = DV
DD
Internal reference on,
reference buffer off
between conversions
0.43
mA
MAX1167/MAX1168
Multichannel, 16-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(AV
DD
= DV
DD
= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Shutdown Supply Current
I
AVDD
+
I
DVDD
CS = DV
DD
, SCLK = 0, DIN = 0,
DSPR = DV
DD
, full power-down
0.6
10
A
Power-Supply Rejection Ratio
PSRR
AV
DD
= DV
DD
= 4.75V to 5.25V, full-scale
input (Note 9)
63
dB
TIMING CHARACTERISTICS (Figures 1, 2, 8, and 16)
(AV
DD
= DV
DD
= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external
V
REF
= +4.096V, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25C.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Acquisition Time
t
ACQ
External clock (Note 6)
729
ns
SCLK to DOUT Valid
t
DO
C
DOUT
= 30pF
50
ns
CS Fall to DOUT Enable
t
DV
C
DOUT
= 30pF
80
ns
CS Rise to DOUT Disable
t
TR
C
DOUT
= 30pF
80
ns
CS Pulse Width
t
CSW
100
ns
SCLK rise
CS to SCLK Setup
t
CSS
SCLK fall (DSP)
100
ns
SCLK rise
CS to SCLK Hold
t
CSH
SCLK fall (DSP)
0
ns
Conversion
93
SCLK High Pulse Width
t
CH
Duty cycle 45% to 55%
Data transfer
50
ns
Conversion
93
SCLK Low Pulse Width
t
CL
Duty cycle 45% to 55%
Data transfer
50
ns
SCLK Period
t
CP
209
ns
SCLK rise
DIN to SCLK Setup
t
DS
SCLK fall (DSP)
50
ns
SCLK rise
DIN to SCLK Hold
t
DH
SCLK fall (DSP)
0
ns
CS Falling to DSPR Rising
t
DF
100
ns
DSPR to SCLK Falling Setup
t
FSS
100
ns
DSPR to SCLK Falling Hold
t
FSH
0
ns
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