General Description
The MAX1117/MAX1118/MAX1119 low-power, 8-bit,
dual-channel, analog-to-digital converters (ADCs) fea-
ture an internal track/hold (T/H) voltage reference
(MAX1117/MAX1119), clock, and serial interface. The
MAX1118 is specified from +2.7V to +5.5V and con-
sumes only 135
µA at 100ksps. The MAX1117 is speci-
fied from +2.7V to +3.6V, and the MAX1119 is specified
from +4.5V to +5.5V, each consumes only 175µA at
100ksps.
The full-scale analog input range is determined by the
internal reference of +2.048V (MAX1117) or +4.096V
(MAX1119), or by an externally applied reference rang-
ing from +1V to V
DD
(MAX1118). All devices feature an
automatic shutdown mode that reduces supply current
to <1µA 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 100ksps are performed using an
internal clock.
The MAX1117/MAX1118/MAX1119 are available in an
8-pin SOT23 package with a footprint that is only 11%
of an 8-pin plastic DIP.
________________________Applications
Low-Power, Handheld Portable Devices
System Diagnostics
Battery-Powered Test Equipment
Solar-Powered Remote Systems
Receive Signal Strength Indicators
4mA to 20mA Powered Remote Data Acquisition
Systems
Features
o Single Supply
+2.7V to +3.6V (MAX1117)
+2.7V to +5.5V (MAX1118)
+4.5V to +5.5V (MAX1119)
o Internal Track/Hold: 100kHz Sampling Rate
o Internal Reference
+2.048V (MAX1117)
+4.096V (MAX1119)
o Reference Input Range: 0 to V
DD
(MAX1118)
o SPI/QSPI/MICROWIRE-Compatible Serial Interface
o Small 8-Pin SOT23 Package
o Automatic Power-Down
o Analog Input Range: 0 to V
REF
o Low Power
175µA at 100ksps (typ) (MAX1117/MAX1119)
135µA at 100ksps (typ) (MAX1118)
18µA at 10ksps (typ)
1µA (typ) in Power-Down Mode
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
________________________________________________________________ Maxim Integrated Products
1
1
2
3
4
8
7
6
5
SCLK
DOUT
CNVST
GND
( ) ARE FOR MAX1118 ONLY
CH1
CHO
V
DD
MAX1117
MAX1118
MAX1119
SOT23
TOP VIEW
(REF) I.C
Pin Configuration
19-1857; Rev 0; 11/00
Ordering Information
PART
TEMP. RANGE
PIN-
PA CK A G E
TO P
M A RK
M A X1 1 1 7 EKA
-40
°C to +85°C
8 SOT23
AADW
M A X1 1 1 8 E K A
-40
°C to +85°C
8 SOT23
AADX
M A X1 1 1 9 E K A
-40
°C to +85°C
8 SOT23
AADY
SPI/QSPI are trademarks of Motorola, Inc.
MICROWIRE is a trademark of National Semiconductor, Corp.
Functional Diagram appears at end of data sheet.
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +3.6V (MAX1117), V
DD
= +4.5V to +5.5V (MAX1119), V
DD
= REF = +2.7V to +5.5V (MAX1118),T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
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 +6.0V
CH0,CH1, REF to GND...............................-0.3V to (V
DD
+ 0.3V)
Digital Output to GND ................................-0.3V to (V
DD
+ 0.3V)
Digital Input to GND ..............................................-0.3V to +6.0V
Maximum Current into Any Pin .........................................±50mA
Continuous Power Dissipation (T
A
= +70°C)
8-Pin SOT23 (derate 8.9mW/°C above +70°C)............714mW
Operating Temperature Range
MAX1117EKA ..................................................-40°C to + 85°C
MAX1118EKA ..................................................-40°C to + 85°C
MAX1119EKA ..................................................-40°C to + 85°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
DC ACCURACY
Resolution
8
Bits
Relative Accuracy (Note 1)
INL
±1
LSB
Differential Nonlinearity
DNL
±1
LSB
Offset Error
±0.5
LSB
MAX1118, REF = V
DD
±1
LSB
Gain Error
MAX1117/MAX1119
±5
%FSR
MAX1118
±5
Gain Temperature Coefficient
MAX1117/MAX1119
±90
ppm/
°C
Total Unadjusted Error
TUE
MAX1118
±0.5
±1
LSB
Channel-to-Channnel Offset
Matching
±0.1
LSB
DYNAMIC PERFORMANCE (25kHz sinewave input, V
IN
= V
REF(pp)
, f
SCLK
= 5MHz, f
sample
= 100ksps, R
IN
= 100
)
Signal-to-Noise Plus Distortion
SINAD
48
dB
Total Harmonic Distortion
(Up to the 5th Harmonic)
THD
-69
dB
Spurious-Free Dynamic Range
SFDR
66
dB
Small Signal Bandwidth
f
-3dB
4
MHz
ANALOG INPUT
Input Voltage Range
0
V
REF
V
Input Leakage
Current
V
CH
_ = 0 or V
DD
±0.7
±10
µA
Input Capacitance
C
IN
18
pF
INTERNAL REFERENCE
MAX1117
2.048
Voltage
V
REF
MAX1119
4.096
V
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
_______________________________________________________________________________________
3
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
EXTERNAL REFERENCE (MAX1118 ONLY)
Input Voltage Range
1.0
V
DD
V
Input Current
Ave, V
DD
= REF = +5.5V at 100ksps
10
20
µA
POWER REQUIREMENTS
MAX1118
2.7
5.5
MAX1117
2.7 5.5
Supply Voltage
V
DD
MAX1119
4.5
5.5
V
MAX1119, f
SAMPLE
= 100ksps,
zero-scale input
182 230
MAX1117/MAX1118, f
SAMPLE
= 100ksps,
zero-scale input
135
190
MAX1119, f
SAMPLE
= 10ksps,
zero-scale input
19
25
MAX1117/MAX1118, f
SAMPLE
= 10ksps,
zero-scale input
14
21
Supply Current (Note 2)
I
DD
Shutdown
0.8
10
µA
Supply Rejection Ratio
PSRR
Full-scale or 0 input
±0.5
±1
LSB/V
DIGITAL INPUTS (CNVST AND SCLK)
Input High Voltage
V
IH
2
V
Input Low Voltage
V
IL
0.8
V
Input Hystersis
V
HYST
0.2
V
Input Current High
I
IH
±10
µA
Input Current Low
I
IL
±10
µA
Input Capacitance
C
IN
2
pF
DIGITAL OUTPUT (DOUT)
Output High Voltage
V
OH
I
SOURCE
= 2mA
V
DD
- 0.5
V
I
SINK
= 2mA
0.4
V
Output Low Voltage
V
OL
I
SINK
= 4mA
0.8
V
Three-State Leakage Current
I
L
±0.01
±10
µA
Three-State Output Capacitance
C
OUT
4
pF
TIMING CHARACTERISTICS (Figures 6a6d)
CNVST High Time
t
csh
100
ns
CNVST Low Time
t
csi
100
ns
Conversion Time
t
conv
7.5
µs
Serial Clock High Time
t
ch
75
ns
Serial Clock Low Time
t
cl
75
ns
Serial Clock Period
t
cp
200
ns
Falling of CNVST to DOUT Active
t
csd
C
LOAD
= 100pF, Figure 1
100
ns
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX1117), V
DD
= +4.5V to +5.5V (MAX1119), V
DD
= REF = +2.7V to +5.5V (MAX1118),T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
Typical Operating Characteristics
(V
DD
= +3V (MAX1117), V
DD
= +5V (MAX1119), V
DD
= V
REF
= +3V (MAX1118), f
SCLK
= 5MHz, f
SAMPLE
= 100ksps, C
LOAD
= 100pF,
T
A
= +25°C, unless otherwise noted.)
MAX1117/18/19 toc01
-1.0
-0.4
-0.6
-0.8
-0.2
0
0.2
0.4
0.6
0.8
1.0
0
100
50
150
200
250
300
INTEGRAL NONLINEARITY
vs.OUTPUT CODE
OUTPUT CODE
INL (LSB)
0
100
50
150
200
250
300
DIFFERENTIAL NONLINEARITY
vs.OUTPUT CODE
MAX1117/18/19 toc02
OUTPUT CODE
DNL (LSB)
-1.0
-0.4
-0.6
-0.8
-0.2
0
0.2
0.4
0.6
0.8
1.0
0
0.2
0.1
0.4
0.3
0.6
0.5
0.7
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1117/18/19 toc03
SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (
µ
A)
2.5
3.5
4.5
5.5
0.1
0.01
0.1
1
10
100
MAX1118
SUPPLY CURRENT vs. CONVERSION RATE
1.0
MAX1117/18/19 toc04
CONVERSION (ksps)
SUPPLY CURRENT (
µ
A)
100.0
10.0
V
DD
= V
REF
= V
DIGITAL
V
DD
= +5V
V
DD
= +3V
MAX1117/18/19 toc05
0
20
40
60
80
110
120
140
160
2.5
3.5
4.5
5.5
MAX1118
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
D
OUT
= 00000000
V
DD
= V
REF
= V
DIGITAL INPUTS
0
50
100
150
-40
-15
10
35
60
85
MAX1118 SUPPLY CURRENT
vs. TEMPERATURE
MAX1117/18/19 toc06
TEMPERATURE (
°C)
SUPPLY CURRENT (
µ
A)
D
OUT
= 00000000
V
DD
= V
REF
= V
DIGITAL INPUTS
V
DD
= +5V
V
DD
= +3V
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
4
_______________________________________________________________________________________
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Serial Clock Falling Edge to
DOUT
t
cd
C
LOAD
= 100pF
10
100
ns
Serial Clock Rising Edge to
DOUT High-Z
t
chz
C
LOAD
= 100pF, Figure 2
100
500
ns
Last Serial Clock to Next CNVST
(Successive Conversions on
CH0)
t
ccs
50
ns
Note 1: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range and off-
set have been calibrated.
Note 2: Input = 0, with logic input levels of 0 and V
DD
.
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +3.6V (MAX1117), V
DD
= +4.5V to +5.5V (MAX1119), V
DD
= REF = +2.7V to +5.5V (MAX1118),T
A
= T
MIN
to T
MAX
,
unless otherwise noted.)
MAX1117/MAX1118/MAX1119
Single-Supply, Low-Power,
2-Channel, Serial 8-Bit ADCs
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(V
DD
= +3V (MAX1117), V
DD
= +5V (MAX1119), V
DD
= V
REF
= +3V (MAX1118), f
SCLK
= 5MHz, f
SAMPLE
= 100ksps, C
LOAD
= 100pF,
T
A
= +25°C, unless otherwise noted.)
0.1
0.01
0.1
1
10
100
MAX1117/MAX1119
SUPPLY CURRENT vs. CONVERSION RATE
1.0
MAX1117/18/19 toc07
CONVERSION (ksps)
SUPPLY CURRENT (
µ
A)
100.0
10.0
MAX1119
V
DD
= +5V
MAX1117
V
DD
= +3V
0
100
50
150
200
2.5
3.5
4.5
5.5
MAX1117/MAX1119 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1117/18/19 toc08
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
µ
A)
D
OUT
= 00000000
V
DD
= V
DIGITAL INPUTS
MAX1117
MAX1119
0
100
50
150
200
-40
-15
35
10
60
85
MAX1117/MAX1119
SUPPLY CURRENT vs. TEMPERATURE
MAX1117/18/19 toc09
TEMPERATURE (V)
SUPPLY CURRENT (
µ
A)
D
OUT
= 00000000
V
DD
= V
DIGITAL INPUTS
MAX1117
VDD = +3V
MAX1119
VDD = +5V
5.0
5.2
5.3
5.1
5.4
5.5
2.5
3.5
4.5
5.5
CONVERSION TIME
vs. SUPPLY VOLTAGE
MAX1117/18/19 toc11
SUPPLY VOLTAGE (V)
CONVERSION TIME (
µ
s)
5.0
5.2
5.3
5.1
5.4
5.5
-40
-15
10
35
60
85
CONVERSION TIME
vs. TEMPERATURE
MAX1117/18/19 toc12
TEMPERATURE (
°C)
CONVERSION TIME (
µ
s)
V
DD
= +3V
V
DD
= +5V
-120
-80
-100
-60
-40
-20
0
0
20k
10k
30k
40k
50k
FFT PLOT
MAX1117/18/19 toc13
ANALOG INPUT FREQUENCY (Hz)
AMPLITUDE (dB)
0
-0.2
-0.4
0.2
0.4
2.5
4.5
3.5
5.5
MAX1118
GAIN ERROR vs. SUPPLY VOLTAGE
MAX1117/18/19 toc14
SUPPLY VOLTAGE (V)
GAIN ERROR (LSB)
V
REF
= 2.048V
-0.5
-0.2
-0.3
-0.4
-0.1
0
0.1
0.2
0.3
0.4
0.5
-40
10
-15
35
60
85
MAX1118
GAIN ERROR vs. TEMPERATURE
MAX1117/18/19 toc15
TEMPERATURE (
°C)
GAIN ERROR (LSB)
V
DD
= +3V
V
REF
= 2.048V
-1.0
-0.6
-0.4
-0.8
-0.2
0
1
4
5
3
2
MAX1118
GAIN ERROR vs. REFERENCE VOLTAGE
MAX1117/18/19 toc16
REFERENCE VOLTAGE (V)
GAIN ERROR (LSB)
V
DD
= +5.5V
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