Maxim MAX199ACAI, MAX199BEAI, MAX199BCWI, MAX199BCNI, MAX199BCAI Datasheet

19-0401; Rev 0; 6/95

Multi-Range (±4V, ±2V, +4V, +2V),

+5V Supply, 12-Bit DAS with 8+4 Bus Interface

_______________General Description

The MAX199 multi-range, 12-bit data-acquisition system
(DAS) requires only a single +5V supply for operation,
and converts analog signals up to ±4V at its inputs. This
system provides eight analog input channels that are
independently software programmable for a variety of
ranges: ±V

REF

, ±V

REF/2

, 0V to V

, or 0V to V

REF

REF/2

This increases effective dynamic range to 14 bits, and
provides the user flexibility to interface 4mA-to-20mA,
±12V, and ±15V powered sensors to a single +5V sys­tem. In addition, the converter is fault-protected to
±16.5V; a fault condition on any channel will not affect
the conversion result of the selected channel. Other fea­tures include a 5MHz bandwidth track/hold, 100ksps
throughput rate, internal/external clock, internal/external
acquisition control, 8+4 parallel interface, and operation
with an internal 4.096V or external reference.

A hardware SHDN pin and two programmable power­down modes (STBYPD, FULLPD) provide low-current
shutdown between conversions. In STBYPD mode, the
reference buffer remains active, eliminating start-up
delays.

The MAX199 employs a standard microprocessor (µP)
interface. Its three-state data I/O interface is configured
to operate with 8-bit data buses, and data-access and
bus-release timing specifications are compatible with
most popular µPs. All logic inputs and outputs are
TTL/CMOS compatible.

The MAX199 is available in 28-pin DIP, wide SO, SSOP,
and ceramic SB packages.

For a different combination of input ranges (±10V, ±5V,
0V to 10V, 0V to 5V), see the MAX197 data sheet. For 12­bit bus interfaces, see the MAX196/MAX198 data sheet.

________________________Applications

Industrial-Control Systems
Robotics
Data-Acquisition Systems
Automatic Testing Systems
Medical Instruments
Telecommunications

Functional Diagram appears at end of data sheet.

____________________________Features

♦ 12-Bit Resolution, 1/2LSB Linearity
♦ Single +5V Operation
♦ Software-Selectable Input Ranges:

±V

, ±V

REF

♦ Internal 4.096V or External Reference

.

♦ Fault-Protected Input Multiplexer (±16.5V)

REF/2

, 0V to V

REF

, 0V to V

REF/2

♦ 8 Analog Input Channels
♦ 6µs Conversion Time, 100ksps Sampling Rate
♦ Internal or External Acquisition Control
♦ Two Power-Down Modes
♦ Internal or External Clock

______________Ordering Information

PART

MAX199ACNI
MAX199BCNI
MAX199ACWI 0°C to +70°C
MAX199BCWI 0°C to +70°C 28 Wide SO
MAX199ACAI 0°C to +70°C 28 SSOP
MAX199BCAI 0°C to +70°C 28 SSOP
MAX199BC/D 0°C to +70°C Dice*

Ordering Information continued at end of data sheet.

*Dice are specified at T

TEMP. RANGE PIN-PACKAGE

0°C to +70°C
0°C to +70°C

A

= +25°C, DC parameters only.

28 Narrow Plastic DIP
28 Narrow Plastic DIP
28 Wide SO

__________________Pin Configuration

TOP VIEW

CLK

1

CS

2

WR

3

RD

4

HBEN

5

SHDN

D7
D6
D5

D4
D3/D11
D2/D10

D1/D9
D0/D8

DIP/SO/SSOP/Ceramic SB

MAX199

6
7
8

9
10
11
12
13
14

28
27
26
25
24
23
22
21
20
19
18
17
16
15

DGND
V

DD

REF
REFADJ
INT
CH7
CH6
CH5
CH4
CH3
CH2
CH1
CH0
AGND

MAX199

________________________________________________________________

Maxim Integrated Products

Call toll free 1-800-722-8266 for free samples or literature.

1

Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface

ABSOLUTE MAXIMUM RATINGS

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

AGND to DGND.....................................................-0.3V to +0.3V

REF to AGND..............................................-0.3V to (V

REFADJ to AGND.......................................-0.3V to (V

Digital Inputs to DGND...............................-0.3V to (V

Digital Outputs to DGND............................-0.3V to (V

CH0–CH7 to AGND ..........................................................±16.5V

MAX199

Continuous Power Dissipation (T

Narrow Plastic DIP (derate 14.29mW/°C above +70°C)....1143mW

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

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

ELECTRICAL CHARACTERISTICS

(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V
with 50% duty cycle; T

ACCURACY (Note 1)

Offset Error

Channel-to-Channel Offset
Error Matching

Gain Error
(Note 2)

Gain Temperature Coefficient
(Note 2)

DYNAMIC SPECIFICATIONS (10kHz sine-wave input, ±4.096Vp-p, f

Aperture Jitter

= T

to T

A

MIN

, unless otherwise noted.)

MAX

MAX199A

INLIntegral Nonlinearity

MAX199B

Unipolar

Bipolar
Unipolar

Bipolar
Unipolar

Bipolar
Unipolar

Bipolar

SINADSignal-to-Noise + Distortion Ratio

Up to the 5th harmonic

50kHz, VIN= ±4V (Note 3)
External CLK mode/external acquisition control
External CLK mode/external acquisition

control
Internal CLK mode/internal acquisition

control (Note 4)

Wide SO (derate 12.50mW/°C above +70°C)..............1000mW

SSOP (derate 9.52mW/°C above +70°C) ......................762mW

Narrow Ceramic SB (derate 20.00mW/°C above +70°C)..1600mW

Operating Temperature Ranges

MAX199_C_ _ .......................................................0°C to +70°C

MAX199_E_ _.....................................................-40°C to +85°C

MAX199_M_ _..................................................-55°C to +125°C

Storage Temperature Range.............................-65°C to +150°C

Lead Temperature (soldering, 10sec).............................+300°C

= 4.096V; 4.7µF at REF pin; external clock, f

REF

CONDITIONS

±1/2

±1

MAX199A
MAX199B
MAX199A
MAX199B

MAX199A
MAX199B
MAX199A
MAX199B

SAMPLE

MAX199A
MAX199B

±0.1
±0.5

= 100ksps)

70
69

±3
±5
±5

±10

±7

±10

±7

±10
3
5

10

CLK

= 2.0MHz

UNITSMIN TYP MAXSYMBOLPARAMETER

ppm/°C

Bits12Resolution
LSB
LSB±1DNLDifferential Nonlinearity

LSB

LSB

LSB

dB
dB-85 -78THDTotal Harmonic Distortion

dB80SFDRSpurious-Free Dynamic Range
dB-86Channel-to-Channel Crosstalk
ns15Aperture Delay

ps<50

ns

2 _______________________________________________________________________________________

Multi-Range (±4V, ±2V, +4V, +2V),

+5V Supply, 12-Bit DAS with 8+4 Bus Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V
with 50% duty cycle; T

ANALOG INPUT

Small-Signal Bandwidth

Input Voltage Range

Input Dynamic Resistance

INTERNAL REFERENCE

REF Output Voltage
REF Output Tempco

(

Contact Maxim Applications
for guaranteed temperature
drift specifications

Load Regulation

REFERENCE INPUT (Buffer disabled, reference input applied to REF pin)

Input Current V

Input Resistance

REFADJ Threshold for
Buffer Disable

= T

to T

A

MIN

)

, unless otherwise noted.)

MAX

f

= 2.0MHz

CLK

-3dB rolloff

Unipolar (see Table 2)

Bipolar (see Table 2)
Unipolar range
Bipolar
Unipolar

Bipolar
(Note 5)

TA= +25°C

REF

MAX199_C

TC V

MAX199_E ±30

REF

MAX199_M ±40

0mA to 0.5mA output current (Note 6) 7.5
0mA to 0.1mA output current (Note 6)

With recommended circuit (Figure 1) %±1.5REFADJ Adjustment Range

= 4.18V

REF

Normal, or STANDBY power-down mode kΩ10
FULL power-down mode 5 MΩ

REF

CONDITIONS

= 4.096V; 4.7µF at REF pin; external clock, f

±V

range

REF

±V

range

REF/2

0V to V
0V to V

±V

Normal, or STANDBY
power-down mode
FULL power-down
mode

REF
REF/2

REF
REF/2

range

range

range

range

-V

-V

REF/2

-1200 10±V

-600 10

5

2.5

2.5

1.25
0V
0V

REF

0.1 10

10

±15

0.8

V

V

CLK

REF

REF/2

REF

REF/2

400

1

MAX199

= 2.0MHz

UNITSMIN TYP MAXSYMBOLPARAMETER

µs3Track/Hold Acquisition Time

MHz

V

µAInput Current

MΩ40

kΩ
pF40Input Capacitance

V4.076 4.096 4.116V

ppm/°C

mA30Output Short-Circuit Current
mV

µF4.7Capacitive Bypass at REF

V2.465 2.500 2.535REFADJ Output Voltage

V/V1.6384Buffer Voltage Gain

V2.4 4.18Input Voltage Range

µA

VVDD- 50mV

_______________________________________________________________________________________ 3

Multi-Range (±4V, ±2V, +4V, +2V),
+5V Supply, 12-Bit DAS with 8+4 Bus Interface

ELECTRICAL CHARACTERISTICS (continued)

(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V
with 50% duty cycle; T

POWER REQUIREMENTS

Supply Voltage

MAX199

Supply Current

Power-Supply Rejection Ratio
(Note 8)

TIMING

Internal Clock Frequency
External Clock Frequency Range MHz

Acquisition Time

Conversion Time

Throughput Rate

Bandgap Reference
Start-Up Time

Reference Buffer Settling
DIGITAL INPUTS (D7–D0, CLK, RD, WR, CS, HBEN, SHDN) (Note 11)

Input High Voltage
Input Low Voltage
Input Leakage Current
Input Capacitance
DIGITAL OUTPUTS (D7–D4, D3/D11, D2/D10, D1/D9, D0/D8, INT)
Output Low Voltage
Output High Voltage
Three-State Output Capacitance

= T

to T

A

MIN

, unless otherwise noted.)

MAX

DD

Normal mode, bipolar ranges
Normal mode, unipolar ranges

I

DD

Standby power-down (STBYPD)
Full power-down mode (FULLPD) (Note 7)

PSRR

t

t

t

External reference = 4.096V
Internal reference ±1/

C

= 100pF MHz1.25 1.56 2.00f

CLK
CLK

ACQI

ACQE

CONV

INH

OUT

CLK

Internal acquisition
External acquisition (Note 9)

After FULLPD or STBYPD
External CLK
Internal CLK, C
External CLK
Internal CLK, C

Power-up (Note 10) µs200

To 0.1mV, REF
bypass capacitor
fully discharged

INL

VIN= 0V or V

IN

(Note 5) pF15C

IN

VDD= 4.75V, I

OL

VDD= 4.75V, I

OH

(Note 5) pF15C

CONDITIONS

CLK

CLK

DD

SINK
SOURCE

= 4.096V; 4.7µF at REF pin; external clock, f

REF

18

610

700 850

60 120

±1/

2

0.1 2.0f
External CLK
Internal CLK

= 100pF 6.0 7.7 10.0

= 100pF 62

C

= 4.7µF

REF

C

= 33µF

REF

= 1.6mA V0.4V

= 1mA VVDD- 1V

3.0

3.0 5.0

3.0

5

6.0

100

8

60

CLK

2

= 2.0MHz

UNITSMIN TYP MAXSYMBOLPARAMETER

V4.75 5.25V

mA

µA

LSB

µs

µs

ksps

ms

V2.4V
V0.8V

µA±10I

4 _______________________________________________________________________________________

Multi-Range (±4V, ±2V, +4V, +2V),

+5V Supply, 12-Bit DAS with 8+4 Bus Interface

TIMING CHARACTERISTICS

(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V
with 50% duty cycle; T

CS Pulse Width
WR Pulse Width
CS to WR Setup Time
CS to WR Hold Time
CS to RD Setup Time
CS to RD Hold Time
CLK to WR Setup Time
CLK to WR Hold Time
Data Valid to WR Setup
Data Valid to WR Hold
RD Low to Output Data Valid

HBEN High or HBEN Low to
Output Valid

RD High to Output Disable
RD Low to INTHigh Delay

Note 1: Accuracy specifications tested at VDD= 5.0V. Performance at power-supply tolerance limits guaranteed by Power-Supply
Note 2: External reference: V

Note 3: Ground “on” channel; sine wave applied to all “off” channels.
Note 4: Maximum full-power input frequency for 1LSB error with 10ns jitter = 3kHz.
Note 5: Guaranteed by design. Not tested.
Note 6: Use static loads only.
Note 7: Tested using internal reference.
Note 8: PSRR measured at full-scale. V
Note 9: External acquisition timing: starts at rising edge of WR

Note 10: Not subject to production testing. Provided for design guidance only.
Note 11: All input control signals specified with t
Note 12: t

Note 13: t

Rejection test. Tested for the ±4.096V input range.

ACQMOD = high.

and t

DO

or 2.4V.

is defined as the time required for the data lines to change by 0.5V.

TR

= T

to T

A

MIN

are measured with the load circuits of Figure 2 and defined as the time required for an output to cross 0.8V

DO1

, unless otherwise noted.)

MAX

CONDITIONS

CS

WR

CSWS

CSWH

CSRS
CSRH

CWS
CWH

DS
DH

Figure 2, CL= 100pF (Note 12)

DO

Figure 2, CL= 100pF (Note 12)

DO1

(Note 13) ns

t

TR

INT1

= 4.096V, offset error nulled, ideal last code transition = FS - 3/2LSB.

REF

= 4.75V to 5.25V.

DD

= tF= 5ns from a voltage level of 0.8V to 2.4V.

R

= 4.096V; 4.7µF at REF pin; external clock, f

REF

with control bit ACQMOD = low; ends at rising edge of WR with

CLK

70

= 2.0MHz

UNITSMIN TYP MAXSYMBOLPARAMETER

ns80t
ns80t
ns0t
ns0t
ns0t
ns0t
ns100t
ns50t
ns60t
ns0t
ns120t

ns120t

ns120t

MAX199

_______________________________________________________________________________________ 5