Rainbow Electronics MAX117 User Manual

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 con­verters (ADCs). They operate from a single +3V supply
and use a half-flash technique to achieve a 1.8µs con­version time (400ksps). A power-down pin (PWRDN)
reduces current consumption to 1µA typical. The
devices return from power-down mode to normal oper­ating mode in less than 900ns, allowing large supply­current 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.

____________________________Features

♦ +3.0V to +3.6V Single-Supply Operation
♦ 4 (MAX113) or 8 (MAX117) Analog Input Channels
♦ Low Power: 1.5mA (operating mode)

1µA (power-down mode)

♦ Total Unadjusted Error ≤ 1LSB
♦ Fast Conversion Time: 1.8µs per Channel
♦ No External Clock Required
♦ Internal Track/Hold
♦ Ratiometric Reference Inputs
♦ Internally Connected 8th Channel Monitors

Reference Voltage (MAX117)

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

______________Ordering Information

PART

MAX113CNG

MAX113CAG
MAX113C/D 0°C to +70°C
MAX113ENG
MAX113EAG
MAX113MRG -55°C to +125°C

Ordering Information continued at end of data sheet.

*Dice are specified at T
**Contact factory for availability.

Pin Configuration appears at end of data sheet.

TEMP. RANGE

0°C to +70°C
0°C to +70°C

-40°C to +85°C 24 Narrow Plastic DIP

-40°C to +85°C

= +25°C, DC parameters only.

A

PIN-PACKAGE

24 Narrow Plastic DIP
24 SSOP
Dice*

24 SSOP
24 Narrow CERDIP**

_________________________________________________________Functional Diagram

MAX113/MAX117

REF+

D7
D6
D5
D4

D3
D2
D1
D0

Maxim Integrated Products

1



MODE

4-BIT

FLASH

ADC

(4MSBs)

4-BIT

DAC

4-BIT

FLASH

ADC

(4LSBs)

TIMING AND

CONTROL

RD

INT

CS

WR/RDY

*IN8

*IN7
*IN6

*IN5

IN4
IN3
IN2

IN1

*MAX117 ONLY

________________________________________________________________

MUX

ADDRESS

LATCH 

DECODE

A0

Σ

A1 A2 REF-

REF+

16

PWRDN

THREE-

STATE
OUTPUT
DRIVERS

MAX113/MAX117

For free samples & the latest literature: http://www.maxim-ic.com, or phone [phone]

+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down

ABSOLUTE MAXIMUM RATINGS

VDDto GND..............................................................-0.3V to +7V

Digital Input Voltage to GND......................-0.3V to (V

Digital Output Voltage to GND...................-0.3V to (V

REF+ to GND..............................................-0.3V to (V

REF- to GND...............................................-0.3V to (V

IN_ to GND.................................................-0.3V to (V

Continuous Power Dissipation (T

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

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.

= +70°C)

A

DD
DD
DD
DD
DD

+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)

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

MAX113/MAX117

ELECTRICAL CHARACTERISTICS

(VDD= +3V to +3.6V, REF+ = 3V, REF- = GND, Read Mode (MODE = GND), TA= T

CONDITIONS

ACCURACY (Note 1)

No-missing-codes guaranteed

DYNAMIC PERFORMANCE

Signal-to-Noise Plus
Distortion Ratio

Spurious-Free Dynamic
Range

ANALOG INPUT

REFERENCE INPUT

Reference Resistance
REF+ Input Voltage Range
REF- Input Voltage Range

SINAD

THDTotal Harmonic Distortion

SFDR

VIN_Input Voltage Range

REF

MAX11_C/E, f
MAX11_M, f
MAX11_C/E, f
MAX11_M, f
MAX11_C/E, f
MAX11_M, f
V

= 3Vp-p

IN_

GND < V

IN_

SAMPLE

SAMPLE

SAMPLE

< V

= 400kHz, fIN= 30.273kHz

SAMPLE

= 340kHz, fIN= 30.725kHz

= 400kHz, fIN= 30.273kHz

SAMPLE

= 340kHz, fIN= 30.725kHz

= 400kHz, fIN= 30.273kHz

SAMPLE

= 340kHz, fIN= 30.725kHz

DD

MIN

to T

, unless otherwise noted.)

MAX

45
45

50
50

REF-

REF-

V

V

UNITSMIN TYP MAXSYMBOLPARAMETER

LSB±1TUETotal Unadjusted Error
LSB±1DNLDifferential Nonlinearity
LSB±1Zero-Code Error
LSB±1Full-Scale Error
LSB±1/4Channel-to-Channel Mismatch

-50

-50

MHz0.3Input Full-Power Bandwidth
V/µs0.28 0.5Input Slew Rate, Tracking

REF+

DD

REF+

Bits8NResolution

dB

dB

dB

VV
µA±3IIN_Input Leakage Current
pF32CIN_Input Capacitance

kΩ124R

VV

VGND V

2 _______________________________________________________________________________________

+3V, 400ksps, 4/8-Channel,

8-Bit ADCs with 1µA Power-Down

ELECTRICAL CHARACTERISTICS (continued)

(VDD= +3V to +3.6V, REF+ = 3V, REF- = GND, Read Mode (MODE = GND), TA= T

CONDITIONS

LOGIC INPUTS

Input High Voltage

Input Low Voltage

Input High Current

Input Low Current
Input Capacitance (Note 2)

LOGIC OUTPUTS

Output Low Voltage

Output High Voltage

Three-State Capacitance
(Note 2)

POWER REQUIREMENTS

Supply Voltage

VDDSupply Current

V

V

V

INH

INL

I

INH

INL

OL

OH

LKG

OUT

DD

I

DD

IN

CS, WR, RD, PWRDN, A0, A1, A2
MODE
CS, WR, RD, PWRDN, A0, A1, A2
MODE

CS, RD, PWRDN, A0, A1, A2
WR

MODE

CS, WR, RD, PWRDN, MODE, A0, A1, A2
CS, WR, RD, PWRDN, MODE, A0, A1, A2

I

= 20µA, INT, D0–D7

SINK

I

= 400µA, INT, D0–D7

SINK

RDY, I
I

SOURCE

I

SOURCE

D0–D7, RDY, digital outputs = 0V to V
D0–D7, RDY

VDD= 3.6V, CS = RD = 0V,
PWRDN = V

VDD= 3.0V, CS = RD = 0V,

PWRDN = V
CS = RD = VDD, PWRDN = 0V (Note 3)

VDD= 3.0V to 3.6V, V

= 1mA 0.4

SINK

= 20µA, INT, D0–D7
= 400µA, INT, D0–D7

MAX11_C

DD

DD

REF

MAX11_E/M
MAX11_C
MAX11_E/M

= 3.0V

MIN

DD

to T

, unless otherwise noted.)

MAX

2

2.4

VDD- 0.1
VDD- 0.4

0.66

0.8
±1
±3

15 100

0.1

±3Three-State Current

58

2.5 5

2.5 6

1.5 3

1.5 3.5

MAX113/MAX117

UNITSMIN TYP MAXSYMBOLPARAMETER

V

V

µA

µA±1I
pF58C

V0.4V

V
µAI
pFC

V3.0 3.6V

mA

µA110Power-Down VDDCurrent

LSB±1/16 ±1/4PSRPower-Supply Rejection

Note 1: Accuracy measurements performed at V
Note 2: Guaranteed by design.
Note 3: Power-down current increases if logic inputs are not driven to GND or V

_______________________________________________________________________________________ 3

= +3.0V. Operation over supply range is guaranteed by power-supply rejection test.

DD

DD

.

+3V, 400ksps, 4/8-Channel,
8-Bit ADCs with 1µA Power-Down

TIMING CHARACTERISTICS

(VDD= +3V, TA= +25°C, unless otherwise noted.) (Note 4)

TA= +25°C

PARAMETER SYMBOL

Conversion Time
(WR-RD Mode)

Conversion Time
(RD Mode)

Power-Up Time t
CS to RD, WR

Setup Time
CS to RD, WR

Hold Time

MAX113/MAX117

CS to RDY Delay
Data Access Time

(RD Mode)
RD to INT Delay

(RD Mode)
Data Hold Time t
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

t

CWR

t

CRD

UP

t

CSS

t

CSH

t

RDY

t

ACC0

t

INTH

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

tRD< t
(Note 5)

CL= 50pF,

= 5.1kΩ to V

R

L

CL= 100pF (Note 5)

CL= 50pF
(Note 6)

tRD< t
t

ACC1

tRD< t
(Note 5)

CL= 50pF
tRD> t

t

ACC2

tRD> t
(Note 5)

Pipelined mode, CL= 50pF
Pipelined mode, CL= 100pF

, CL= 100pF

INTL

DD

, determined by

INTL

, CL= 100pF

INTL

, determined by

INTL

, CL= 100pF

INTL

ALL GRADES

0 ns

0 ns

100 ns

t

CRD

100

100 160 ns

100 ns

450 ns(Note 7) 600

0.6 10 µs

0.8 µs

400 ns

400 ns
300 ns

0.7 1.45 µs

180 ns

180 ns
180 ns
100 ns

50 ns

TA= T

MIN MAX

1.8 µs

2.0 µs

0.9 µs
0

0

+

t

CRD

120

130
170
130

MIN

+

to T

MAX

MAX117M

MIN MAXMIN TYP MAX

0

0

t

CRD

2.42.06

2.62.4

1.41.2

140

150
180
150

UNITSCONDITIONS MAX117C/E

+

ns

700

0.8 100.66 10

500
340

1.6

220
200
130

1.0

600

600
400

1.8

250

250
240
150

70

0.9

500

220

60

Note 4: Input control signals are specified with t

delays get shorter at higher supply voltages. See the Conversion Time vs. Supply Voltage graph in the

Characteristics

to extrapolate timing delays at other power-supply voltages.

= tf= 5ns, 10% to 90% of 3V, and timed from a voltage level of 1.3V. Timing

r

Typical Operating

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 _______________________________________________________________________________________