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General Description
The MAX1106/MAX1107 low-power, 8-bit, single-channel,
analog-to-digital converters (ADCs) feature an internal
track/hold (T/H), voltage reference, clock, and serial inter-
face. The MAX1106 is specified from +2.7V to +3.6V and
consumes only 96µA. The MAX1107 is specified from
+4.5V to +5.5V and consumes only 107µA. The analog
inputs are pin-configurable, allowing unipolar and single-
ended or differential operation.
The full-scale analog input range is determined by the
internal reference of +2.048V (MAX1106) or +4.096V
(MAX1107), or by an externally applied reference rang-
ing from 1V to V
DD
. The MAX1106/MAX1107 also feature
a pin-selectable power-down mode that reduces power
consumption to 0.5µA when the device is not in use. The
3-wire serial interface directly connects to SPITM, QSPITM,
and MICROWIRETM devices without external logic.
Conversions up to 25ksps are performed using the inter-
nal clock.
The MAX1106/MAX1107 are available in a 10-pin µMAX
package with a footprint that is just 20% of an
8-pin plastic DIP.
Applications
Portable Data Logging
Hand-Held Measurement Devices
Medical Instruments
System Diagnostics
Solar-Powered Remote Systems
420mA-Powered Remote Systems
Receive-Signal-Strength Indicators
Features
o
Single Supply: +2.7V to +3.6V (MAX1106)
+4.5V to +5.5V (MAX1107)
o
Low Power: 96µA at +3V and 25ksps
0.5µA in Power-Down Mode
o
Pin-Programmable Configuration
o
0 to V
DD
Input Voltage Range
o
Internal Track/Hold
o
Internal Reference: +2.048V (MAX1106)
+4.096V (MAX1107)
o
1V to V
DD
Reference Input Range
o
SPI/QSPI/MICROWIRE-Compatible Serial Interface
o
Small 10-Pin µMAX Package
MAX1106/MAX1107
Single-Supply, Low-Power,
Serial 8-Bit ADCs
________________________________________________________________
Maxim Integrated Products
1
1
2
3
4
5
10
9
8
7
6
SCLK
DOUT
SHDN
CONVST
GND
IN-
IN+
V
DD
MAX1106
MAX1107
µ
MAX
TOP VIEW
REFIN
REFOUT
CONTROL
LOGIC
T/H
SAR
INTERNAL
OSCILLATOR
OUTPUT
SHIFT
REGISTER
V
DD
ANALOG
INPUT
MUX
INTERNAL
REFERENCE
DOUT
SCLK
SHDN
IN+
REFIN
IN-
REFOUT
CONVST
GND
CHARGE
REDISTRIBUTION
DAC
MAX1106
MAX1107
Functional Diagram
19-1432; Rev 0; 3/99
Pin Configuration
Ordering Information
PART
MAX1106
CUB
MAX1106EUB
-40°C to +85°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
10 µMAX
10 µMAX
MAX1107
CUB
MAX1107EUB
-40°C to +85°C
0°C to +70°C
10 µMAX
10 µMAX
SPI and QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor Corp.
MAX1106/MAX1107
Single-Supply, Low-Power,
Serial 8-Bit ADCs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS--MAX1106
(V
DD
= +2.7V to +3.6V; IN- to GND; f
SCLK
= 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at
REFIN; 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
IN+, IN-, REFIN, REFOUT,
DOUT to GND..........................................-0.3V to (V
DD
+ 0.3V)
SHDN, SCLK, CONVST to GND ...............................-0.3V to +6V
Continuous Power Dissipation (T
A
= +70°C)
10-pin µMAX (derate 5.6mW/°C above +70°C) ............444mW
Operating Temperature Ranges
MAX110_CUB ......................................................0°C to +70°C
MAX110_EUB ...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
V
DD
= 2.7V to 3.6V
V
DD
= 5.5V (Note 2)
No missing codes over temperature
CONDITIONS
±0.15
±0.5
Bits
8
Resolution
LSB
±0.2
INL
Relative Accuracy (Note 1)
LSB
±1
DNL
Differential Nonlinearity
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
V
DD
= 5.5V (Note 2)
V
DD
= 2.7V to 3.6V
LSB
±0.5
Offset Error
±0.2
±1
LSB
±1
Gain Error (Note 3)
ppm/°C
±0.8
Gain Temperature Coefficient
T
A
= T
MIN
to T
MAX
T
A
= +25°C
dB
49
SINAD
Signal-to-Noise Plus Distortion
dB
-70
THD
Total Harmonic Distortion
(up to the 5th harmonic)
LSB
±0.5
TUE
Total Unadjusted Error
±1
-3dB rolloff
V
IN+
to V
IN-
MHz
0.8
Full-Power Bandwidth
MHz
1.5
BW
-3dB
Small-Signal Bandwidth
0
V
REFIN
Input Voltage Range (Note 4)
dB
68
SFDR
Spurious-Free Dynamic Range
V
V
IN_
pF
18
C
IN
Input Capacitance
On/off-leakage current,
V
IN+
or V
IN-
= 0 or V
DD
µA
±0.01
±1
Input Leakage Current
DC ACCURACY
DYNAMIC PERFORMANCE
(10kHz sine-wave input, 2.048Vp-p, 25ksps conversion rate)
ANALOG INPUTS
V
MAX1106/MAX1107
Single-Supply, Low-Power,
Serial 8-Bit ADCs
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS--MAX1106 (continued)
(V
DD
= +2.7V to +3.6V; IN- to GND; f
SCLK
= 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at
REFIN; T
A
= T
MIN
to T
MAX
; unless otherwise noted. Typical values are at T
A
= +25°C.)
CONDITIONS
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
Figure 7
µs
t
CONV
Conversion Time
35
µs
1
t
ACQ
Track/Hold Acquisition Time
ps
<50
Aperture Jitter
ns
10
Aperture Delay
kHz
400
Internal Clock Frequency
(Note 5)
0 to 0.5mA (Note 6)
ppm/°C
±50
REF Tempco
µA
150
I
REFSC
REF Short-Circuit Current
mV
4
Load Regulation
V
1.968
2.048
2.128
V
REFOUT
Output Voltage
+2.048V at REFIN, full scale
µA
1
20
Input Current
V
2.7
3
5.5
V
DD
Supply Voltage
Power down, V
DD
= 3.6V
Full-scale input, V
DD
= 2.7V to 3.6V
0.5
2.5
I
DD
mV
±0.4
±4
PSR
Power-Supply Rejection (Note 8)
V
DD
= 3.6V, C
L
= 10pF
V
DD
= 5.5V, C
L
= 10pF
115
µF
1
Capacitive Bypass at REFOUT
V
0.2
V
HYST
Input Hysteresis
V
0.8
V
IL
Threshold Voltage Low
µA
±1
I
IH
Input Current High
V
DD
3.6V
V
DD
> 3.6V
2
V
3
V
IH
Threshold Voltage High
MHz
2
External Clock Frequency Range
V
1.0
V
DD
+ 0.05
V
REFIN
Input Voltage Range
µA
±1
I
IL
Input Current Low
pF
15
C
IN
Input Capacitance
For data transfer only
96
250
µA
Supply Current (Notes 2, 7)
TRACK/HOLD
INTERNAL REFERENCE
EXTERNAL REFERENCE
POWER REQUIREMENTS
DIGITAL INPUTS
(SHDN, SCLK, and CONVST)
V
MAX1106/MAX1107
Single-Supply, Low-Power,
Serial 8-Bit ADCs
4
_______________________________________________________________________________________
Figure 6, DOUT High-Z
Figure 6, DOUT High-Z
pF
15
C
OUT
Three-State Output Capacitance
µA
±0.01
±10
I
L
Three-State Leakage Current
Figure 1, C
LOAD
= 100pF
Figure 1, C
LOAD
= 100pF
ns
20
200
t
DO
SCLK Fall to Output Data Valid
ns
CONDITIONS
240
t
DV
CONVST Rise to Output Enable
ns
200
t
CH
SCLK Pulse Width High
µs
1
t
CSPW
CONVST Pulse Width High
µs
1
t
ACQ
Acquisition Time
µs
35
t
CONV
CONVST Fall to Output Data
Valid
External reference
Figure 2, C
LOAD
= 100pF
Internal reference (Note 9)
µs
20
ns
240
t
SHDN
SHDN Fall to Output Disable
ms
12
t
WAKE
Wake-Up Time
Figure 2, C
LOAD
= 100pF
ns
240
t
TR
SCLK Low to Output Disable
ns
200
t
CL
SCLK Pulse Width Low
ns
100
t
SCC
SCLK Low to CONVST Rise
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
I
SINK
= 5mA
I
SOURCE
= 0.5mA
I
SINK
= 16mA
0.4
V
V
DD
- 0.5
V
OH
Output High Voltage
V
0.8
V
OL
Output Low Voltage
ELECTRICAL CHARACTERISTICS--MAX1106 (continued)
(V
DD
= +2.7V to +3.6V; IN- to GND; f
SCLK
= 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +2.048V reference at
REFIN; T
A
= T
MIN
to T
MAX
; unless otherwise noted. Typical values are at T
A
= +25°C.)
DIGITAL OUTPUT
(DOUT)
TIMING CHARACTERISTICS
(Figures 6 and 7)
MAX1106/MAX1107
Single-Supply, Low-Power,
Serial 8-Bit ADCs
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS--MAX1107
(V
DD
= +4.5V to +5.5V; IN- = GND; f
SCLK
= 2MHz; 25ksps conversion rate; 1µF capacitor at REFOUT; external +4.096V reference at
REFIN; T
A
= T
MIN
to T
MAX
; unless otherwise noted. Typical values are at T
A
= +25°C.)
ps
<50
Aperture Jitter
ns
10
Aperture Delay
kHz
400
Internal Clock Frequency
0 to 0.5mA (Note 6)
ppm/°C
±50
REF Tempco
mA
CONDITIONS
5
I
REFSC
REF Short-Circuit Current
mV
4
Load Regulation
MHz
V
3.936
4.096
4.256
V
REFOUT
Output Voltage
µF
1
Capacitive Bypass at REFOUT
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
dB
SINAD
Signal-to-Noise Plus Distortion
49
µs
1
t
ACQ
Track/Hold Acquisition Time
Figure 7
µs
t
CONV
Conversion Time
35
SFDR
Spurious-Free Dynamic Range
dB
dB
68
THD
Total Harmonic Distortion
(up to the 5th harmonic)
-70
Full-Power Bandwidth
MHz
V
IN+
to V
IN-
0
V
REFIN
-3dB rolloff
MHz
0.8
BW
-3dB
Small-Signal Bandwidth
1.5
V
IN_
Input Voltage Range (Note 4)
V
Input Leakage Current
µA
On/off-leakage current,
V
IN+
or V
IN-
= 0 or V
DD
±0.01
±1
pF
C
IN
Input Capacitance
18
2
External Clock Frequency Range
For data transfer only
T
A
= T
MIN
to T
MAX
±0.5
T
A
= +25°C
LSB
±1
TUE
Total Unadjusted Error
ppm/°C
±0.8
Gain Temperature Coefficient
LSB
±1
Gain Error (Note 3)
LSB
±0.2
±1
Offset Error
No missing codes over temperature
LSB
±1
DNL
Differential Nonlinearity
LSB
±0.15
±0.5
INL
Relative Accuracy (Note 1)
Bits
8
Resolution
DC ACCURACY
DYNAMIC PERFORMANCE
(10kHz sine-wave input, 4.096Vp-p, 25ksps conversion rate)
ANALOG INPUTS
TRACK/HOLD
INTERNAL REFERENCE
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