19-1081; Rev 1; 8/96
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
_______________General Description
The MAX113/MAX117 are microprocessor-compatible,
8-bit, 4-channel and 8-channel analog-to-digital con-
verters (ADCs). They operate from a single +3V supply
and use a half-flash technique to achieve a 1.8µs con-
version time (400ksps). A power-down pin (PWRDN)
reduces current consumption to 1µA typical. The
devices return from power-down mode to normal oper-
ating mode in less than 900ns, allowing large supply-
current reductions in burst-mode applications. (In burst
mode, the ADC wakes up from a low-power state at
specified intervals to sample the analog input signals.)
Both converters include a track/hold, enabling the ADC
to digitize fast analog signals.
Microprocessor (µP) interfaces are simplified because
the ADC can appear as a memory location or I/O port
without external interface logic. The data outputs use
latched, three-state buffer circuitry for direct connection
to an 8-bit parallel µP data bus or system input port.
The MAX113/MAX117 input/reference configuration
enables ratiometric operation.
The 4-channel MAX113 is available in a 24-pin DIP or
SSOP. The 8-channel MAX117 is available in a 28-pin
DIP or SSOP. For +5V applications, refer to the
MAX114/MAX118 data sheet.
____________________________Features
o
+3.0V to +3.6V Single-Supply Operation
o
4 (MAX113) or 8 (MAX117) Analog Input Channels
o
Low Power: 1.5mA (operating mode)
1µA (power-down mode)
o
Total Unadjusted Error
≤
1LSB
o
Fast Conversion Time: 1.8µs per Channel
o
No External Clock Required
o
Internal Track/Hold
o
Ratiometric Reference Inputs
o
Internally Connected 8th Channel Monitors
Reference Voltage (MAX117)
MAX113/MAX117
______________Ordering Information
PART
MAX113CNG
MAX113CAG
MAX113C/D
MAX113ENG
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
24 Narrow Plastic DIP
________________________Applications
Battery-Powered Systems
System-Health Monitoring
Communications Systems
Portable Equipment
Remote Data Acquisition
MAX113EAG
-40°C to +85°C
24 SSOP
MAX113MRG
-55°C to +125°C
24 Narrow CERDIP**
Ordering Information continued at end of data sheet.
*Dice are specified at T
A
= +25°C, DC parameters only.
**Contact factory for availability.
Pin Configuration appears at end of data sheet.
_________________________________________________________Functional Diagram
REF+
D7
D6
D5
D4
*IN8
*IN7
*IN6
*IN5
IN4
IN3
IN2
IN1
MUX
4-BIT
FLASH
ADC
(4MSBs)
Σ
REF+
16
4-BIT
DAC
THREE-
STATE
OUTPUT
DRIVERS
D3
D2
D1
D0
4-BIT
FLASH
ADC
(4LSBs)
TIMING AND
CONTROL
ADDRESS
LATCH
DECODE
MAX113/MAX117
A0
A1
A2
REF-
*MAX117 ONLY
RD
CS
PWRDN
MODE
WR/RDY
INT
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
MAX113/MAX117
ABSOLUTE MAXIMUM RATINGS
V
DD
to GND ..............................................................-0.3V to +7V
Digital Input Voltage to GND ......................-0.3V to (V
DD
+ 0.3V)
Digital Output Voltage to GND ...................-0.3V to (V
DD
+ 0.3V)
REF+ to GND..............................................-0.3V to (V
DD
+ 0.3V)
REF- to GND...............................................-0.3V to (V
DD
+ 0.3V)
IN_ to GND .................................................-0.3V to (V
DD
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
24 Narrow Plastic DIP
(derate 13.33mW/°C above +70°C) ................................1.08W
24 SSOP (derate 8.00mW/°C above +70°C).................640mW
24 Narrow CERDIP (derate 12.50mW/°C above +70°C) .....1W
28 Wide Plastic DIP
(derate 14.29mW/°C above +70°C) ................................1.14W
28 SSOP (derate 9.52mW/°C above +70°C).................762mW
28 Wide CERDIP (derate 16.67mW/°C above +70°C)....1.33W
Operating Temperature Ranges
MAX113C_G/MAX117C_I ....................................0°C to +70°C
MAX113E_G/MAX117E_I ..................................-40°C to +85°C
MAX113MRG/MAX117MJI..............................-55°C to +125°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°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.
ELECTRICAL CHARACTERISTICS
(V
DD
= +3V to +3.6V, REF+ = 3V, REF- = GND, Read Mode (MODE = GND), T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
ACCURACY
(Note 1)
Resolution
Total Unadjusted Error
Differential Nonlinearity
Zero-Code Error
Full-Scale Error
Channel-to-Channel Mismatch
DYNAMIC PERFORMANCE
Signal-to-Noise Plus
Distortion Ratio
Total Harmonic Distortion
Spurious-Free Dynamic
Range
Input Full-Power Bandwidth
Input Slew Rate, Tracking
ANALOG INPUT
Input Voltage Range
Input Leakage Current
Input Capacitance
REFERENCE INPUT
Reference Resistance
REF+ Input Voltage Range
REF- Input Voltage Range
R
REF
1
V
REF-
GND
2
4
V
DD
V
REF+
kΩ
V
V
V
IN
_
I
IN
_
C
IN
_
GND < V
IN_
< V
DD
32
V
REF-
V
REF+
±3
V
µA
pF
SINAD
THD
SFDR
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
V
IN_
= 3Vp-p
0.28
50
50
0.3
0.5
45
45
-50
-50
dB
dB
dB
MHz
V/µs
N
TUE
DNL
No-missing-codes guaranteed
8
±1
±1
±1
±1
±1/4
Bits
LSB
LSB
LSB
LSB
LSB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
2
_______________________________________________________________________________________
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +3V to +3.6V, REF+ = 3V, REF- = GND, Read Mode (MODE = GND), T
A
= T
MIN
to T
MAX
, unless otherwise noted.)
PARAMETER
LOGIC INPUTS
Input High Voltage
Input Low Voltage
V
INH
V
INL
CS, WR, RD, PWRDN,
A0, A1, A2
MODE
CS, WR, RD, PWRDN,
A0, A1, A2
MODE
CS, RD, PWRDN,
A0, A1, A2
Input High Current
Input Low Current
Input Capacitance (Note 2)
LOGIC OUTPUTS
I
SINK
= 20µA,
INT,
D0–D7
Output Low Voltage
V
OL
I
SINK
= 400µA,
INT,
D0–D7
RDY, I
SINK
= 1mA
Output High Voltage
Three-State Current
Three-State Capacitance
(Note 2)
POWER REQUIREMENTS
Supply Voltage
V
DD
V
DD
= 3.6V,
CS
=
RD
= 0V,
PWRDN
= V
DD
V
DD
= 3.0V,
CS
=
RD
= 0V,
PWRDN
= V
DD
MAX11_C
MAX11_E/M
MAX11_C
MAX11_E/M
3.0
2.5
2.5
1.5
1.5
1
±1/16
3.6
5
6
3
3.5
10
±1/4
µA
LSB
mA
V
V
OH
I
LKG
C
OUT
I
SOURCE
= 20µA,
INT,
D0–D7
I
SOURCE
= 400µA,
INT,
D0–D7
D0–D7, RDY, digital outputs = 0V to V
DD
D0–D7, RDY
5
V
DD
- 0.1
V
DD
- 0.4
±3
8
0.1
0.4
0.4
V
µA
pF
V
I
INH
I
INL
C
IN
WR
MODE
CS, WR, RD, PWRDN,
MODE, A0, A1, A2
CS, WR, RD, PWRDN,
MODE, A0, A1, A2
5
15
2
2.4
0.66
0.8
±1
±3
100
±1
8
µA
pF
µA
V
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
MAX113/MAX117
V
DD
Supply Current
I
DD
Power-Down V
DD
Current
Power-Supply Rejection
PSR
CS
=
RD
= V
DD
,
PWRDN
= 0V (Note 3)
V
DD
= 3.0V to 3.6V, V
REF
= 3.0V
Note 1:
Accuracy measurements performed at V
DD
= +3.0V. Operation over supply range is guaranteed by power-supply rejection test.
Note 2:
Guaranteed by design.
Note 3:
Power-down current increases if logic inputs are not driven to GND or V
DD
.
_______________________________________________________________________________________
3
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
MAX113/MAX117
TIMING CHARACTERISTICS
(V
DD
= +3V, T
A
= +25°C, unless otherwise noted.) (Note 4)
PARAMETER
Conversion Time
(WR-RD Mode)
Conversion Time
(RD Mode)
Power-Up Time
CS
to
RD, WR
Setup Time
CS
to
RD, WR
Hold Time
CS
to RDY Delay
Data Access Time
(RD Mode)
RD
to
INT
Delay
(RD Mode)
Data Hold Time
Minimum
Acquisition Time
WR
Pulse Width
Delay Between
WR
and
RD
Pulses
RD
Pulse Width
(WR-RD Mode)
Data Access Time
(WR-RD Mode)
RD
to
INT
Delay
WR
to
INT
Delay
RD
Pulse Width
(WR-RD Mode)
Data Access Time
(WR-RD Mode)
WR
to
INT
Delay
Data Access Time
After
INT
Multiplexer Address
Hold Time
SYMBOL
CONDITIONS
t
RD
< t
INTL
, C
L
= 100pF
(Note 5)
T
A
= +25°C
ALL GRADES
MIN
t
CWR
t
CRD
t
UP
t
CSS
t
CSH
t
RDY
t
ACC0
t
INTH
t
DH
t
ACQ
t
WR
t
RD
t
READ1
t
ACC1
t
RI
t
INTL
t
READ2
t
ACC2
t
IHWR
t
ID
t
AH
C
L
= 50pF
t
RD
> t
INTL
, determined by
t
ACC2
t
RD
> t
INTL
, C
L
= 100pF
(Note 5)
Pipelined mode, C
L
= 50pF
Pipelined mode, C
L
= 100pF
50
180
180
180
100
60
0.7
t
RD
< t
INTL
, determined by
t
ACC1
t
RD
< t
INTL
, C
L
= 100pF
(Note 5)
C
L
= 50pF,
R
L
= 5.1kΩ to V
DD
C
L
= 100pF (Note 5)
C
L
= 50pF
(Note 6)
(Note 7)
450
0.6
0.8
400
400
300
1.45
220
220
200
130
70
10
100
0
0
100
t
CRD
+
100
160
100
600
0.66
0.9
500
500
340
1.6
250
250
240
150
10
TYP
MAX
1.8
2.0
0.9
0
0
120
t
CRD
+
130
170
130
700
0.8
1.0
600
600
400
1.8
10
T
A
= T
MIN
to T
MAX
MAX117C/E
MIN
MAX
2.06
2.4
1.2
0
0
140
t
CRD
+
150
180
150
MAX117M
MIN
MAX
2.4
2.6
1.4
µs
µs
µs
ns
ns
ns
ns
ns
ns
ns
µs
µs
ns
ns
ns
µs
ns
ns
ns
ns
ns
UNITS
Note 4:
Input control signals are specified with t
r
= t
f
= 5ns, 10% to 90% of 3V, and timed from a voltage level of 1.3V. Timing
delays get shorter at higher supply voltages. See the Conversion Time vs. Supply Voltage graph in the
Typical Operating
Characteristics
to extrapolate timing delays at other power-supply voltages.
Note 5:
See Figure 1 for load circuit. Parameter defined as the time required for the output to cross 0.66V or 2.0V.
Note 6:
See Figure 2 for load circuit. Parameter defined as the time required for the data lines to change 0.5V.
Note 7:
Also defined as the Minimum Address-Valid to Convert-Start Time.
4
_______________________________________________________________________________________
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
__________________________________________Typical Operating Characteristics
(V
DD
= +3V, T
A
= +25°C, unless otherwise noted.)
CONVERSION TIME
vs. AMBIENT TEMPERATURE
MAX113/117-01
MAX113/MAX117
EFFECTIVE BITS vs.
INPUT FREQUENCY (WR-RD MODE)
MAX113/117-02
SIGNAL-TO-NOISE RATIO
f
IN
= 30.27kHz
V
IN
= 2.88Vp-p
f
SAMPLE
= 400ksps
SNR = 48.8dB
MAX113/117-03
1.6
t
CRD
(NORMALIZED TO VALUE
AT V
DD
= +3.3V, +25°C)
1.4
1.2
V
DD
= 3.6V
1.0
0.8
0.6
0.4
-60
-20
20
60
100
V
DD
= 3.0V
V
DD
= 3.3V
8.0
7.5
7.0
EFFECTIVE BITS
6.5
6.0
5.5
5.0
4.5
4.0
f
SAMPLE
= 400kHz
V
IN
= 2.98Vp-p
1k
10k
100k
1M
0
-20
SNR (dB)
-40
-60
-80
-100
0
40
80
120
160
200
FREQUENCY (kHz)
140
TEMPERATURE (°C)
INPUT FREQUENCY (Hz)
CONVERSION TIME
vs. SUPPLY VOLTAGE
MAX113/117-04
AVERAGE POWER CONSUMPTION
vs. SAMPLING RATE USING PWRDN
MAX113/117-06
1400
1300
1200
t
CRD
(ns)
1100
1000
900
800
2.8
3.0
3.2
3.4
3.6
3.8
5
POWER DISSIPATION (mW)
4
3
2
1
0
4.0
1
10
100
1000
SUPPLY VOLTAGE (V)
SAMPLING RATE (ksps)
TOTAL UNADJUSTED ERROR
vs. POWER-UP TIME
MAX113/117-08
SUPPLY CURRENT vs. TEMPERATURE
(EXCLUDING REFERENCE CURRENT)
MAX113/117-10
5
V
DD
= 3.0V
4
SUPPLY CURRENT (mA)
4
TUE (LSB)
V
DD
= 5.25V
3
V
DD
= 3.3V
2
V
DD
= 3.0V
1
3
2
1
V
DD
= 3.6V
0
120
160
200
240
280
320
-60
-20
20
60
100
140
t
UP
(ns)
TEMPERATURE (°C)
0
_______________________________________________________________________________________
5
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