_______________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.
________________________Applications
Battery-Powered Systems
Portable Equipment
System-Health Monitoring
Remote Data Acquisition
Communications Systems
____________________________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
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
________________________________________________________________
Maxim Integrated Products
1
4-BIT
DAC
4-BIT
FLASH
ADC
(4MSBs)
4-BIT
FLASH
ADC
(4LSBs)
TIMING AND
CONTROL
ADDRESS
LATCH
DECODE
REF+
16
THREE-
STATE
OUTPUT
DRIVERS
D7
D6
D5
D4
D3
D2
D1
D0
MUX
*IN7
*IN8
REF+
*IN6
*IN5
IN4
IN3
IN2
IN1
A0
A1
A2
REF-
PWRDN
RD
MODE
INT
WR/RDY
CS
MAX113/MAX117
*MAX117 ONLY
_________________________________________________________Functional Diagram
19-1081; Rev 1; 8/96
PART
MAX113
CNG
MAX113CAG
MAX113C/D
0°C to +70°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
24 Narrow Plastic DIP
24 SSOP
Dice*
______________Ordering Information
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
MAX113ENG
MAX113EAG
MAX113MRG
-55°C to +125°C
-40°C to +85°C
-40°C to +85°C
24 Narrow Plastic DIP
24 SSOP
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.
MAX113/MAX117
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.)
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 +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
V
IN_
= 3Vp-p
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
GND < V
IN_
< V
DD
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
No-missing-codes guaranteed
CONDITIONS
V
V
REF-
V
DD
REF+ Input Voltage Range
k
1
2
4
R
REF
Reference Resistance
pF
32
C
IN
_
Input Capacitance
µA
±3
I
IN
_
Input Leakage Current
V
V
REF-
V
REF+
V
IN
_
Input Voltage Range
V/µs
0.28
0.5
Input Slew Rate, Tracking
LSB
±1
TUE
Total Unadjusted Error
Bits
8
N
Resolution
MHz
0.3
Input Full-Power Bandwidth
dB
45
SINAD
Signal-to-Noise Plus
Distortion Ratio
45
LSB
±1
DNL
Differential Nonlinearity
LSB
±1
Zero-Code Error
LSB
±1
Full-Scale Error
LSB
±1/4
Channel-to-Channel Mismatch
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
dB
-50
THD
Total Harmonic Distortion
-50
MAX11_M, f
SAMPLE
= 340kHz, f
IN
= 30.725kHz
MAX11_C/E, f
SAMPLE
= 400kHz, f
IN
= 30.273kHz
dB
50
SFDR
Spurious-Free Dynamic
Range
50
V
GND
V
REF+
REF- Input Voltage Range
ACCURACY
(Note 1)
DYNAMIC PERFORMANCE
ANALOG INPUT
REFERENCE INPUT
MAX113/MAX117
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
_______________________________________________________________________________________
3
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.)
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
.
WR
CS, RD, PWRDN, A0, A1, A2
µA
±3
I
INH
D0D7, RDY
D0D7, RDY, digital outputs = 0V to V
DD
I
SOURCE
= 20µA,
INT, D0D7
I
SINK
= 400µA,
INT, D0D7
MODE
MODE
I
SINK
= 20µA,
INT, D0D7
CS, WR, RD, PWRDN, A0, A1, A2
CS, WR, RD, PWRDN, MODE, A0, A1, A2
CS, WR, RD, PWRDN, MODE, A0, A1, A2
CONDITIONS
Input High Current
±1
pF
C
OUT
µA
I
LKG
Three-State Capacitance
(Note 2)
V
DD
- 0.1
V
0.4
V
OL
Output Low Voltage
0.1
pF
5
8
C
IN
Input Capacitance (Note 2)
µA
±1
I
INL
Input Low Current
15
100
V
2.4
V
INH
Input High Voltage
MODE
2
CS, WR, RD, PWRDN, A0, A1, A2
V
UNITS
MIN
TYP
MAX
SYMBOL
PARAMETER
0.8
V
INL
Input Low Voltage
0.66
2.5
5
V
3.0
3.6
V
DD
Supply Voltage
V
DD
= 3.0V to 3.6V, V
REF
= 3.0V
CS = RD = V
DD
,
PWRDN = 0V (Note 3)
LSB
±1/16
±1/4
PSR
Power-Supply Rejection
µA
1
10
Power-Down V
DD
Current
V
DD
= 3.6V,
CS = RD = 0V,
PWRDN = V
DD
2.5
6
MAX11_C
RDY, I
SINK
= 1mA
0.4
I
SOURCE
= 400µA,
INT, D0D7
V
V
DD
- 0.4
V
OH
Output High Voltage
1.5
3
V
DD
= 3.0V,
CS = RD = 0V,
PWRDN = V
DD
mA
1.5
3.5
I
DD
V
DD
Supply Current
MAX11_E/M
MAX11_C
MAX11_E/M
5
8
LOGIC INPUTS
LOGIC OUTPUTS
POWER REQUIREMENTS
±3
Three-State Current
MAX113/MAX117
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
4
_______________________________________________________________________________________
TIMING CHARACTERISTICS
(V
DD
= +3V, T
A
= +25°C, unless otherwise noted.) (Note 4)
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.
0.8
10
0.66
10
WR Pulse Width
t
WR
0.6
10
µs
700
Minimum
Acquisition Time
t
ACQ
450
ns
(Note 7)
600
MAX117M
MIN
MAX
MIN
TYP
MAX
PARAMETER
SYMBOL
MIN
MAX
UNITS
CONDITIONS
MAX117C/E
T
A
= +25°C
ALL GRADES
T
A
= T
MIN
to T
MAX
250
Data Access Time
(WR-RD Mode)
t
ACC2
180
ns
t
RD
> t
INTL
, C
L
= 100pF
(Note 5)
220
1.0
600
150
600
400
1.8
70
250
240
Data Access Time
After
INT
t
ID
Delay Between
WR
and
RD Pulses
t
RD
0.8
µs
RD Pulse Width
(WR-RD Mode)
t
READ1
400
ns
100
ns
Multiplexer Address
Hold Time
Data Access Time
(WR-RD Mode)
t
ACC1
400
ns
RD to INT Delay
t
RI
300
ns
WR to INT Delay
t
INTL
0.7
1.45
µs
t
AH
50
ns
Pipelined mode, C
L
= 100pF
RD Pulse Width
(WR-RD Mode)
t
READ2
180
ns
WR to INT Delay
t
IHWR
180
ns
0.9
500
130
t
RD
> t
INTL
, determined by
t
ACC2
t
RD
< t
INTL
, determined by
t
ACC1
500
t
RD
< t
INTL
, C
L
= 100pF
(Note 5)
340
C
L
= 50pF
Pipelined mode, C
L
= 50pF
1.6
60
220
200
150
0
0
140
t
CRD
+
150
180
130
0
0
120
t
CRD
+
130
170
Data Hold Time
t
DH
100
ns
CS to RD, WR
Setup Time
t
CSS
0
ns
CS to RD, WR
Hold Time
t
CSH
0
ns
CS to RDY Delay
t
RDY
100
ns
(Note 6)
Data Access Time
(RD Mode)
t
ACC0
t
CRD
+
100
ns
RD to INT Delay
(RD Mode)
t
INTH
100
160
ns
C
L
= 100pF (Note 5)
C
L
= 50pF,
R
L
= 5.1k
to V
DD
C
L
= 50pF
2.4
2.06
Conversion Time
(WR-RD Mode)
t
CWR
1.8
µs
t
RD
< t
INTL
, C
L
= 100pF
(Note 5)
1.4
1.2
Power-Up Time
t
UP
0.9
µs
2.6
2.4
Conversion Time
(RD Mode)
t
CRD
2.0
µs
MAX113/MAX117
+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down
_______________________________________________________________________________________
5
1.6
0.4
-60
140
CONVERSION TIME
vs. AMBIENT TEMPERATURE
0.6
1.4
TEMPERATURE (°C)
t
CRD
(NORMALIZED TO VALUE
AT V
DD
= +3.3V, +25°C)
60
1.0
0.8
-20
20
100
1.2
V
DD
= 3.3V
V
DD
= 3.6V
V
DD
= 3.0V
MAX113/117-01
8.0
4.0
1k
10k
100k
EFFECTIVE BITS vs.
INPUT FREQUENCY (WR-RD MODE)
INPUT FREQUENCY (Hz)
EFFECTIVE BITS
1M
7.5
7.0
6.5
6.0
5.5
5.0
4.5
f
SAMPLE
= 400kHz
V
IN
= 2.98Vp-p
MAX113/117-02
-100
0
200
SIGNAL-TO-NOISE RATIO
FREQUENCY (kHz)
SNR (dB)
120
-80
40
80
160
-40
0
-20
-60
MAX113/117-03
f
IN
= 30.27kHz
V
IN
= 2.88Vp-p
f
SAMPLE
= 400ksps
SNR = 48.8dB
1400
800
2.8
4.0
CONVERSION TIME
vs. SUPPLY VOLTAGE
900
1300
SUPPLY VOLTAGE (V)
t
CRD
(ns)
3.6
1100
1000
3.0
3.4
3.8
1200
3.2
MAX113/117-04
4
5
0
1
AVERAGE POWER CONSUMPTION
vs. SAMPLING RATE USING PWRDN
1
3
SAMPLING RATE (ksps)
POWER DISSIPATION (mW)
1000
2
10
100
MAX113/117-06
5
0
120
160
240
320
TOTAL UNADJUSTED ERROR
vs. POWER-UP TIME
1
4
MAX113/117-08
t
UP
(ns)
TUE (LSB)
200
280
3
2
V
DD
= 3.0V
V
DD
= 3.6V
__________________________________________Typical Operating Characteristics
(V
DD
= +3V, T
A
= +25°C, unless otherwise noted.)
V
DD
= 5.25V
4
0
-60
140
SUPPLY CURRENT vs. TEMPERATURE
(EXCLUDING REFERENCE CURRENT)
1
2
3
MAX113/117-10
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
60
100
-20
20
V
DD
= 3.3V
V
DD
= 3.0V
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