MAXIM MAX1067, MAX1068 Technical data
General Description
The MAX1067/MAX1068 low-power, multichannel, 14bit analog-to-digital converters (ADCs) feature a successive-approximation ADC, integrated +4.096V
reference, a reference buffer, an internal oscillator,
automatic power-down, and a high-speed SPI™/
QSPI™/MICROWIRE™-compatible interface. The
MAX1067/MAX1068 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 MAX1067/MAX1068 consume only 2.9mA (AVDD=
DVDD= +5V) at 200ksps when using an external reference. AutoShutdown™ reduces the supply current to
145µA at 10ksps and to less than 10µA at reduced sampling rates.
The MAX1067 includes a 4-channel input multiplexer, and
the MAX1068 accepts up to eight analog inputs.
In addition, digital signal processor (DSP)-initiated conversions are simplified with the DSP frame-sync input and
output featured in the MAX1068. The MAX1068 includes a
data-bit transfer input to select between 8-bit-wide or 16bit-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, combined with ease of use and an integrated reference,
make the MAX1067/MAX1068 ideal for control and dataacquisition operations or for other applications with
demanding power consumption and space requirements. The MAX1067 is available in a 16-pin QSOP
package, and the MAX1068 is available in a 24-pin
QSOP package. Both devices are guaranteed over the
commercial (0°C to +70°C) and extended (-40°C to
+85°C) temperature ranges. Use the MAX1168 evaluation kit to evaluate the MAX1068.
Applications
Motor Control
Industrial Process Control
Industrial I/O Modules
Data-Acquisition Systems
Thermocouple Measurements
Accelerometer Measurements
Features
♦ 14-Bit Resolution, ±0.5 LSB INL and
±1 LSB DNL (max)
♦ +5V Single-Supply Operation
♦ Adjustable Logic Level (+2.7V to +5.25V)
♦ Input Voltage Range: 0 to V
REF
♦ Internal (+4.096V) or External (+3.8V to AVDD)
Reference
♦ Internal Track/Hold, 4MHz Input Bandwidth
♦ Internal or External Clock
♦ SPI/QSPI/MICROWIRE-Compatible Serial
Interface, MAX1068 Performs DSP-Initiated
Conversions
♦ 8-Bit-Wide or 16-Bit-Wide Data-Transfer Mode
(MAX1068 Only)
♦ 4-Channel (MAX1067) or 8-Channel (MAX1068)
Input Mux
Scan Mode Sequentially Converts Multiple
Channels or One Channel Continuously
♦ Low Power
2.9mA at 200ksps
1.45mA at 100ksps
145µA at 10ksps
0.6µA in Full Power-Down Mode
♦ Small Package Size
16-Pin QSOP (MAX1067)
24-Pin QSOP (MAX1068)
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
19-2955; 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.
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.
查询MAX1067AEEE供应商
PART TEMP RANGE
MAX1067ACEE 0°C to +70°C 16 QSOP ±0.5
MAX1067BCEE 0°C to +70°C 16 QSOP ±1
MAX1067CCEE 0°C to +70°C 16 QSOP ±2
MAX1067AEEE -40°C to +85°C 16 QSOP ±0.5
MAX1067BEEE -40°C to +85°C 16 QSOP ±1
MAX1067CEEE -40°C to +85°C 16 QSOP ±2
PINPACKAGE
(LSB)
INL
MAX1067/MAX1068
Multichannel, 14-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.
AVDDto 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
= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
24-Pin QSOP (derate 9.5mW/°C above +70°C)...........762mW
Operating Temperature Ranges
MAX106_ _ CE_ ..................................................0°C to +70°C
MAX106_ _ EE_ ...............................................-40°C to +85°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
ELECTRICAL CHARACTERISTICS
(AVDD= DVDD= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
DC ACCURACY (Note 1)
Resolution 14 Bits
Relative Accuracy (Note 2) INL
Differential Nonlinearity DNL
Transition Noise RMS noise
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
Signal-to-Noise Plus Distortion SINAD 81 84 dB
Signal-to-Noise Ratio SNR 82 84 dB
Total Harmonic Distortion THD -98 -86 dB
Spurious-Free Dynamic Range SFDR 87 99 dB
Full-Power Bandwidth -3dB point 4 MHz
Full-Linear Bandwidth SINAD > 81dB 10 kHz
Channel-to-Channel Isolation (Note 4) 85 dB
CONVERSION RATE
Conversion Time t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX106_A ±0.5 ±1
MAX106_B ±1.0 ±2
MAX106_C ±1.5 ±3
MAX106_A ±1
MAX106_B
MAX106_C
External reference 0.33
Internal reference 0.35
CONV
No missing codes
over temperature
) (Note 1)
P-P
Internal clock, no data transfer,
single conversion (Note 5)
External clock 3.75
5.52 7.07
+1.5
-1.0
+1.5
-1.0
LSB
LSB
LSB
RMS
µs
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________ 3
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
Acquisition Time t
Serial Clock Frequency f
Internal Clock Frequency f
Aperture Delay t
Aperture Jitter t
Sample Rate (Note 7) f
Duty Cycle 45 55 %
ANALOG INPUT (AIN_)
Input Range V
Input Capacitance C
EXTERNAL REFERENCE
Input Voltage Range V
Input Current I
INTERNAL REFERENCE
Reference Voltage V
Reference Short-Circuit Current I
Reference Temperature
Coefficient
Reference Wake-Up Time t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ACQ
SCLK
INTCLK
AD
AJ
AIN
AIN
REF
REF
REFIN
REFSC
RWAKEVREF
(Note 6) 729 ns
External clock, data transfer and conversion 0.1 4.8
External clock, data transfer only 9
Internal clock 3.2 4.0 MHz
15 ns
<50 ps
8-bit-wide data-transfer mode 4.17 200.00
16-bit-wide data-transfer mode 3.125 150.000
Internal clock, single conversion, 8-bit-wide
data-transfer mode
Internal clock, single conversion, 16-bit-
S
wide data-transfer mode
Internal clock, scan mode, 8-bit-wide datatransfer mode (four conversions)
External clock, scan mode, 16-bit-wide
data-transfer mode (four conversions)
_0V
_45pF
3.8 AV
V
_ = 0 110
AIN
SCLK idle 0.1
CS = DVDD, SCLK idle 0.1
4.056 4.096 4.136 V
= 0 5 ms
89
68
103
82
REF
DD
13 mA
±25 ppm/°C
MHz
ksps
V
V
µA
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
DIGITAL INPUTS (SCLK, CS, DSEL, DSPR, DIN) (DVDD = +2.7V to +5.25V)
Input High Voltage V
Input Low Voltage V
Input Leakage Current I
Input Hysteresis V
Input Capacitance C
DIGITAL OUTPUT (DOUT, DSPX, EOC) (DVDD = +2.7V to +5.25V)
Output High Voltage V
Output Low Voltage V
Tri-State Output Leakage Current I
Tri-State Output Capacitance C
POWER SUPPLIES
Analog Supply AV
Digital Supply DV
Analog Supply Current (Note 8) I
Digital Supply Current I
Power-Down Supply Current
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
0.7 ×
DV
DD
0.3 ×
DV
±0.1 ±1 µA
0.2 V
15 pF
DV
-
DD
0.4
±0.1 ±10 µA
15 pF
4.75 5.25 V
2.70 5.25 V
1.01
0.43
HYST
AVDD
DVDD
I
AVDD
I
DVDD
IH
IL
IN
IN
OH
OL
L
OUT
DD
DD
Digital inputs = 0 to DV
+
I
I
I
CS = DV
CS = DV
200ksps
100ksps
10ksps
1ksps
DOUT =
all zeros
CS = DVDD,
SCLK = 0,
DIN = 0,
DSPR = DV
= 0.5mA
SOURCE
= 10mA, DVDD = +4.75V to +5.25V 0.8
SINK
= 1.6mA, DVDD = +2.7V to +5.25V 0.4
SINK
DD
DD
DD
External reference 2.0 2.9
Internal reference 2.9 3.8
External reference 1.0
Internal reference 2.0
External reference 0.1
Internal reference 1.1
External reference 0.01
Internal reference 1.01
200ksps 0.87 1.3
100ksps 0.45
10ksps 0.045
1ksps 0.005
Internal reference and
reference buffer on
between conversions
Internal reference on,
DD
reference buffer off
between conversions
DD
V
V
V
V
mA
mA
mA
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(AVDD= DVDD= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
TIMING CHARACTERISTICS (Figures 1, 2, 8, and 16)
(AVDD= DVDD= +4.75V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion (200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
Shutdown Supply Current
Power-Supply Rejection Ratio PSRR
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I
+
AVDD
I
DVDD
CS = DVDD, SCLK = 0, DIN = 0,
DSPR = DV
= DVDD = 4.75V to 5.25V, full-scale
AV
DD
input (Note 9)
, full power-down
DD
Acquisition Time t
SCLK to DOUT Valid t
CS Fall to DOUT Enable t
CS Rise to DOUT Disable t
CS Pulse Width t
CS to SCLK Setup t
CS to SCLK Hold t
SCLK High Pulse Width t
SCLK Low Pulse Width t
SCLK Period t
DIN to SCLK Setup t
DIN to SCLK Hold t
CS Falling to DSPR Rising t
DSPR to SCLK Falling Setup t
DSPR to SCLK Falling Hold t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ACQ
DO
DV
TR
CSW
CSS
CSH
CH
CL
CP
DS
DH
DF
FSS
FSH
External clock (Note 6) 729 ns
C
= 30pF 50 ns
DOUT
C
= 30pF 80 ns
DOUT
C
= 30pF 80 ns
DOUT
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
Duty cycle 45% to 55%
Duty cycle 45% to 55%
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
100 ns
100 ns
Conversion 93
Data transfer 50
Conversion 93
Data transfer 50
209 ns
50 ns
100 ns
100 ns
0.6
63 dB
0ns
0ns
0ns
10
µA
ns
ns
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
6 _______________________________________________________________________________________
TIMING CHARACTERISTICS (Figures 1, 2, 8, and 16)
(AVDD= +4.75V to +5.25V, DVDD= +2.7V to +5.25V, f
SCLK
= 4.8MHz external clock (50% duty cycle), 24 clocks/conversion
(200ksps), external V
REF
= +4.096V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at TA= +25°C.)
Note 1: AVDD= DVDD= +5.0V.
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after full-scale range has been
calibrated.
Note 3: Offset and reference errors nulled.
Note 4: DC voltage applied to on channel, and a full-scale 1kHz sine wave applied to off channels.
Note 5: Conversion time is measured from the rising edge of the 8th external SCLK pulse to EOC transition minus t
ACQ
in 8-bit data-
transfer mode.
Note 6: See Figures 10 and 17.
Note 7: f
SCLK
= 4.8MHz, f
INTCLK
= 4.0MHz. Sample rate is calculated with the formula fs= n1(n2 / f
SCLK
+ n3 / f
INTCLK
)-1where: n
1
= number of scans, n2= number of SCLK cycles, and n3= number of internal clock cycles (see Figures 11–14).
Note 8: Internal reference and buffer are left on between conversions.
Note 9: Defined as the change in the positive full scale caused by a ±5% variation in the nominal supply voltage.
Acquisition Time t
SCLK to DOUT Valid t
CS Fall to DOUT Enable t
CS Rise to DOUT Disable t
CS Pulse Width t
CS to SCLK Setup t
CS to SCLK Hold t
SCLK High Pulse Width t
SCLK Low Pulse Width t
SCLK Period t
DIN to SCLK Setup t
DIN to SCLK Hold t
CS Falling to DSPR Rising t
DSPR to SCLK Falling Setup t
DSPR to SCLK Falling Hold t
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
ACQ
DO
DV
TR
CSW
CSS
CSH
CH
CL
CP
DS
DH
DF
FSS
FSH
External clock (Note 6) 729 ns
C
DOUT
C
DOUT
C
DOUT
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
Duty cycle 45% to 55%
Duty cycle 45% to 55%
SCLK rise
SCLK fall (DSP)
SCLK rise
SCLK fall (DSP)
= 30pF 100 ns
= 30pF 100 ns
= 30pF 80 ns
100 ns
100 ns
0ns
Conversion 93
Data transfer 93
Conversion 93
Data transfer 93
209 ns
100 ns
0ns
100 ns
100 ns
0ns
ns
ns
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________ 7
Typical Operating Characteristics
(AVDD= DVDD= +5V, f
SCLK
= 4.8MHz, C
DOUT
= 30pF, external V
REF
= +4.096V, TA= +25°C, unless otherwise noted.)
INL vs. CODE
1.0
0.8
0.6
0.4
0.2
0
INL (LSB)
-0.2
-0.4
-0.6
-0.8
-1.0
0 81924096 12,288 16,384
CODE
SINAD vs. FREQUENCY
90
80
70
60
50
40
SINAD (dB)
30
20
10
0
0.1 100
FREQUENCY (kHz)
f
SAMPLE
= 200kbps
101
1.0
0.8
0.6
MAX1067/68 toc01
0.4
0.2
0
DNL (LSB)
-0.2
-0.4
-0.6
-0.8
-1.0
120
100
MAX1067/68 toc04
80
60
SFDR (dB)
40
20
0
DNL vs. CODE
0 81924096 12,288 16,384
CODE
SFDR vs. FREQUENCY
f
= 200ksps
SAMPLE
0.1 100
FREQUENCY (kHz)
101
MAX1067/68 toc02
MAX1067/68 toc05
20
FFT AT f
0
-20
-40
-60
-80
AMPLITUDE (dB)
-100
-120
-140
-160
0608020 40 100
= 1kHz
AIN
FREQUENCY (kHz)
THD vs. FREQUENCY
0
f
= 200kbps
SAMPLE
-20
-40
-60
THD (dB)
-80
-100
-120
0.1 100
FREQUENCY (kHz)
101
MAX1067/68 toc03
MAX1067/68 toc06
SUPPLY CURRENT vs. CONVERSION RATE
(EXTERNAL CLOCK)
3.0
DVDD = AVDD = +5V
= ALL ZEROS
D
OUT
2.5
EXTERNAL CLOCK
SPI MODE
2.0
1.5
1.0
SUPPLY CURRENT (mA)
0.5
0
-0.5
0200
I
, INT REF
AVDD
I
, EXT REF
AVDD
I
DVDD
CONVERSION RATE (ksps)
MAX1067/68 toc07
(mA)
AVDD
I
18016014012010080604020
vs. ANALOG SUPPLY VOLTAGE
(INTERNAL REFERENCE)
2.95
DVDD = +5V
= 200ksps
f
S
2.90
2.85
2.80
2.75
2.70
4.75 5.25
ANALOG SUPPLY CURRENT
TA = +85°C
AVDD (V)
TA = +70°C
TA = +25°C
TA = 0°C
TA = -40°C
5.155.054.954.85
MAX1067/68 toc08
ANALOG SUPPLY CURRENT
vs. ANALOG SUPPLY VOLTAGE
(EXTERNAL REFERENCE)
2.00
DVDD = +5V
= 200ksps
f
S
1.95
1.90
(mA)
AVDD
I
1.85
1.80
1.75
4.75 5.25
TA = +85°C
TA = +70°C
TA = +25°C
TA = -40°C
AVDD (V)
MAX1067/68 toc09
TA = 0°C
5.155.054.954.85
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
8 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
(AVDD= DVDD= +5V, f
SCLK
= 4.8MHz, C
DOUT
= 30pF, external V
REF
= +4.096V, TA= +25°C, unless otherwise noted.)
DIGITAL SUPPLY CURRENT
vs. DIGITAL SUPPLY VOLTAGE
2.6
AVDD = +5V
= 0
V
IL
2.2
= 200ksps
f
S
1.8
(mA)
1.4
DVDD
I
1.0
0.6
DOUT = 1010...1010
DOUT = 0000...0000
0.58
0.57
MAX1067/68 toc10
0.56
(µA)
0.55
DVDD
I
0.54
0.53
POWER-DOWN SUPPLY CURRENT
vs. AV
DD
(INTERNAL REFERENCE)
DVDD = +5V
I
DVDD
SUPPLY VOLTAGE
MAX1067/68 toc11
I
AVDD
1.04
1.03
1.02
1.01
1.00
0.99
(mA)
AVDD
I
(µA)
DVDD
I
POWER-DOWN SUPPLY CURRENT
SUPPLY VOLTAGE
vs. DV
DD
(INTERNAL REFERENCE)
0.7
DVDD = +5VAVDD = +5V
0.6
0.5
0.4
0.3
0.2
I
DVDD
MAX1067/68 toc12
I
AVDD
1.03
1.02
1.01
1.00
(mA)
AVDD
I
0.2
2.70 5.25
DVDD (V)
4.744.233.723.21
0.52
4.75 5.25
SHUTDOWN SUPPLY CURRENT
SUPPLY VOLTAGE
vs. AV
DD
(EXTERNAL REFERENCE)
0.58
DVDD = +5V
0.57
0.56
(µA)
I
I
0.55
DVDD
DVDD
0.54
0.53
0.52
4.75 5.25
AVDD (V)
MAX1067/68 toc13
I
AVDD
5.155.054.954.85
POWER-DOWN SUPPLY CURRENT
vs. TEMPERATURE (INTERNAL REFERENCE)
0.58
DVDD = AVDD = +5V
0.57
0.56
(µA)
0.55
DVDD
I
0.54
0.53
I
DVDD
MAX1067/68 toc15
I
AVDD
0.54
0.50
0.46
0.42
0.38
0.34
0.30
1.04
1.03
1.02
1.01
1.00
0.99
AVDD (V)
(nA)
AVDD
I
(mA)
AVDD
I
5.155.054.954.85
0.98
0.1
2.70 5.25
SHUTDOWN SUPPLY CURRENT
vs. DV
SUPPLY VOLTAGE
DD
(EXTERNAL REFERENCE)
0.7
DVDD = +5VAVDD = +5V
0.6
0.5
(µA)
0.4
DVDD
I
0.3
I
0.2
0.1
DVDD
2.70 5.25
DVDD (V)
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE (EXTERNAL REFERENCE)
0.58
DVDD = AVDD = +5V
0.57
0.56
(µA)
0.55
DVDD
I
0.54
0.53
I
AVDD
I
DVDD
MAX1067/68 toc14
I
AVDD
4.744.233.723.21
MAX1067/68 toc16
DVDD (V)
0.45
0.43
0.41
0.39
0.37
0.43
0.42
0.41
0.40
0.39
0.38
0.37
(nA)
AVDD
I
(nA)
AVDD
I
4.744.233.723.21
0.99
0.52
-40 85
TEMPERATURE (°C)
603510-15
0.98
0.52
-40 85
TEMPERATURE (°C)
603510-15
0.35
OFFSET ERROR vs. SUPPLY VOLTAGE
MAX1067/68 toc17
AVDD (V)
OFFSET ERROR (µV)
5.154.85 5.054.95
-150
-100
-50
0
50
100
150
200
-200
4.75 5.25
V
REF
= +4.096V
GAIN ERROR vs. SUPPLY VOLTAGE
MAX1067/68 toc18
AVDD (V)
GAIN ERROR (%FSR)
5.154.85 5.054.95
-0.025
-0.020
-0.015
-0.010
-0.005
0
0.005
0.010
0.015
0.020
-0.030
4.75 5.25
V
REF
= +4.096V
MAX1067/MAX1068
Multichannel, 14-Bit, 200ksps Analog-to-Digital
Converters
_______________________________________________________________________________________ 9
Typical Operating Characteristics (continued)
(AVDD= DVDD= +5V, f
SCLK
= 4.8MHz, C
DOUT
= 30pF, external V
REF
= +4.096V, TA= +25°C, unless otherwise noted.)
GAIN ERROR vs. TEMPERATURE
0.015
V
= +4.096V
REF
0.010
0.005
0
-0.005
-0.010
GAIN ERROR (%FSR)
-0.015
-0.020
-0.025
-40 85
TEMPERATURE (°C)
603510-15
0
-10
-20
MAX1067/68 toc20
-30
-40
-50
-60
ISOLATION (dB)
-70
-80
-90
-100
-110
CHANNEL-TO-CHANNEL ISOLATION
0100
OFFSET ERROR vs. TEMPERATURE
500
400
300
200
100
0
-100
OFFSET ERROR (µV)
-200
-300
-400
-500
-40 85
INTERNAL +4.096V REFERENCE VOLTAGE
vs. FREQUENCY
FREQUENCY (kHz)
V
REF
= +4.096V
908060 7020 30 40 5010
MAX1067/68 toc21
(V)
V
4.104
4.100
4.096
REF
4.092
4.088
vs. ANALOG SUPPLY VOLTAGE
DVDD = +5V
4.75 5.25
TEMPERATURE (°C)
AVDD (V)
V
= +4.096V
REF
TA = +85°C
TA = +70°C
TA = +25°C
TA = 0°C
TA = -40°C
5.155.054.954.85
MAX1067/68 toc19
603510-15
MAX1067/68 toc22
EXTERNAL REFERENCE INPUT CURRENT
vs. EXTERNAL REFERENCE VOLTAGE
160
V
= 0
AIN
140
120
100
(µA)
REF
I
= 4.8MHz
f
SCLK
= DV
AV
DD
DD
80
60
40
20
0
199ksps, EXTERNAL CLOCK
87.19ksps, INTERNAL CLOCK
2.0 5.5
INTERNAL CLOCK CONVERSION TIME
(8th RISING SCLK TO FALLING EOC)
70
8-BIT DATA-TRANSFER MODE
60
16-BIT DATA-TRANSFER MODE
50
f
= 4.8MHz
SCLK
40
(ms)
CONV
t
30
20
10
0
17
12
10
6
1
NUMBER OF SCAN-MODE CONVERSIONS
31
24
22
17
46
39
38
33
28
= +5V
V
INTERNAL REFERENCE VOLTAGE
vs. REF LOAD
4.5
4.0
3.5
MAX1067/68 toc23
3.0
(V)
2.5
REF
V
2.0
1.5
f
= 0
SCLK
1.0
INTERNAL REFERENCE MODE
5.04.52.5 3.0 3.5 4.0
(V)
REF
LOAD APPLIED TO REF
0.5
= 1µF
C
REF
0
014
(mA)
I
REF
MAX1067/68 toc24
12106 842
60
53
MAX1067/68 toc25
44
8765432
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