Maxim MAX196ACWI, MAX196ACNI, MAX196ACAI, MAX196BCNI, MAX196BCAI Datasheet

19-0435; Rev 0; 9/95
EVALUATION KIT
AVAILABLE
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
_______________General Description
The MAX196/MAX198 multirange, 12-bit data-acquisi­tion systems (DAS) require only a single +5V supply for operation, yet convert analog signals at their inputs up to ±10V (MAX196) and ±4V (MAX198). These systems provide six analog input channels that are indepen­dently software programmable for a variety of ranges: ±10V, ±5V, 0V to +10V, and 0V to +5V for the MAX196; ±V
, ±V
REF
/2, 0V to +V
REF
, and 0V to +V
REF
REF
/2 for the MAX198. This range switching increases the effec­tive dynamic range to 14 bits and provides the flexibility to interface ±12V, ±15V, and 4mA to 20mA powered sensors to a single +5V system. In addition, these con­verters are 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, soft­ware-selectable internal/external clock, internal/external acquisition control, 12-bit parallel interface, and internal
4.096V or external reference. Two programmable power-down modes (STBYPD,
FULLPD) provide low-current shutdown between con­versions. In STBYPD mode, the reference buffer remains active, eliminating start-up delays.
The MAX196/MAX198 employ a standard microproces­sor (µP) interface. A three-state data I/O port is config­ured to operate with 16-bit data buses, and data­access and bus-release timing specifications are com­patible with most popular µPs. All logic inputs and out­puts are TTL/CMOS compatible.
These devices are available in 28-pin DIP, wide SO, SSOP (55% smaller in area than wide SO), and ceramic SB packages. For 8+4 bus interface, see the MAX197 and the MAX199 data sheets. An evaluation kit will be available after December 1995 (MAX196EVKIT-DIP).
________________________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 LinearitySingle +5V Supply OperationSoftware-Selectable Input Ranges:
±10V, ±5V, 0V to +10V, 0V to +5V (MAX196) ±V
, ±V
REF
(MAX198)
/2, 0V to +V
REF
, 0V to +V
REF
REF
/2
Internal 4.096V or External ReferenceFault-Protected Input Multiplexer6 Analog Input Channels6µs Conversion Time, 100ksps Sampling RateInternal or External Acquisition ControlTwo Power-Down ModesInternal or External Clock
______________Ordering Information
PART
MAX196ACNI
MAX196BCNI MAX196ACWI 0°C to +70°C MAX196BCWI 0°C to +70°C 28 Wide SO MAX196ACAI 0°C to +70°C 28 SSOP MAX196BCAI 0°C to +70°C 28 SSOP
Ordering Information continued at end of data sheet.
TEMP. RANGE PIN-PACKAGE
0°C to +70°C 0°C to +70°C
28 Narrow Plastic DIP 28 Narrow Plastic DIP 28 Wide SO
__________________Pin Configuration
TOP VIEW
CLK
1
CS
2
D11
3
D10
4
D9
5 D8 D7 D6 D5 D4 D3 D2 D1 D0
DIP/SO/SSOP/Ceramic SB
MAX196
6
MAX198
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
WR RD INT REF REFADJ CH5 CH4 CH3 CH2 CH1 CH0 AGND
MAX196/MAX198
________________________________________________________________
Maxim Integrated Products
Call toll free 1-800-722-8266 for free samples or literature.
1
Multirange, Single +5V, 12-Bit DAS with 12-Bit 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–CH5 to AGND ..........................................................±16.5V
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
MAX196/MAX198
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, ±10Vp-p (MAX196) or ±4.096Vp-p (MAX198), f
= T
to T
A
MIN
; unless otherwise noted. Typical values are at TA= +25°C.)
MAX
MAX196A/MAX198A
INLIntegral Nonlinearity
MAX196B/MAX198B
Unipolar
Bipolar Unipolar
Bipolar Unipolar
Bipolar Unipolar
Bipolar
SINADSignal-to-Noise + Distortion Ratio
MAX196A/MAX198A MAX196B/MAX198B 69 Up to the 5th harmonic
MAX196A/MAX198A MAX196B/MAX198B MAX196A/MAX198A MAX196B/MAX198B
MAX196A/MAX198A MAX196B/MAX198B MAX196A/MAX198A MAX196B/MAX198B
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
MAX196_C_ I/MAX198_C_ I .................................0°C to +70°C
MAX196_E_ I/MAX198_E_ I...............................-40°C to +85°C
MAX196_MYI/MAX198_MYI.............................-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
±3 ±5 ±5
±10 ±0.1 ±0.5
±7
±10
±7
±10
3 5
= 100ksps)
SAMPLE
70
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
50kHz, VIN= ±5V (MAX196) or ±4V (MAX198) (Note 3)
External CLK mode/external acquisition control External CLK mode/external acquisition control
Aperture Jitter
2 _______________________________________________________________________________________
Internal CLK mode/internal acquisition control (Note 4)
10
dB-86Channel-to-Channel Crosstalk ns15Aperture Delay
ps<50 ns
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
ELECTRICAL CHARACTERISTICS (continued)
(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V with 50% duty cycle; T
PARAMETER SYMBOL MIN TYP MAX UNITS
ANALOG INPUT
Track/Hold Acquisition Time 3 µs
Small-Signal Bandwidth
Input Voltage Range (see Table 3)
Input Current
Input Resistance Input Capacitance 40 pF
INTERNAL REFERENCE
REF Output Voltage V REF Output Tempco
(Contact Maxim Applications for guaranteed temperature drift specifications)
Output Short-Circuit Current 30 mA Load Regulation 10 mV0mA to 0.5mA output current (Note 6) Capacitive Bypass at REF 4.7 µF REFADJ Output Voltage 2.465 2.500 2.535 V REFADJ Adjustment Range ±1.5 %With recommended circuit (Figure 1) Buffer Voltage Gain 1.6384 V/V
= T
to T
A
MIN
; unless otherwise noted. Typical values are at TA= +25°C.)
MAX
CONDITIONS
f
= 2.0MHz
V
I
TC V
CLK
-3dB rolloff
Unipolar
V
IN
Bipolar
Unipolar
I
IN
Bipolar
Unipolar
IN
IN
Bipolar (Note 5)
TA= +25°C
REF
MAX196_C/MAX198_C
REF
±10V or ±V ±5V or ±V 0V to 10V or 0V to V 0V to 5V or 0V to V
MAX196
MAX198
MAX196
MAX198
MAX196 MAX198 MAX196
MAX198
= 4.096V; 4.7µF at REF pin; external clock, f
REF
range
REF
/2 range
REF
0V to 10V range 0V to 5V range
±10V range ±5V range ±V
REF
±V
REF
REF
/2 range
REF
range
/2 range
range
1.25 010 05 0V 0V
-10 10
-5 5
-V
REF
-V
/2 V
REF
-1200 720
-600 360
-1200 10
-600 10
4.076 4.096 4.116 V
5
2.5
2.5
REF
V
REF
720 360
0.1 10
21 16
15 30MAX196_E/MAX198_E 40MAX196_M/MAX198_M
CLK
REF
REF
= 2.0MHz
/2
/2
ppm/°C
MAX196/MAX198
MHz
V
µA
k
_______________________________________________________________________________________ 3
Multirange, Single +5V, 12-Bit DAS with 12-Bit Bus Interface
ELECTRICAL CHARACTERISTICS (continued)
(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V with 50% duty cycle; T
REFERENCE INPUT (buffer disabled, reference input applied to REF pin)
Input Current
Input Resistance REFADJ Threshold for
Buffer Disable
POWER REQUIREMENTS
MAX196/MAX198
Supply Voltage
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) (Note 11)
Input High Voltage V Input Low Voltage V Input Leakage Current I Input Capacitance
= T
to T
A
MIN
; unless otherwise noted. Typical values are at TA= +25°C.)
MAX
Normal, or STANDBY
=
power-down mode FULL power-down mode
= 100pF MHz1.25 1.56 2.00f
CLK
CLK
DD
DD
I
DD
PSRR
CLK CLK
t
ACQI
t
ACQE
t
CONV
INH
INL IN
C
IN
V
REF
4.18V Normal, or STANDBY power-down mode k10
FULL power-down mode 5 M
Normal mode, bipolar ranges Normal mode, unipolar ranges STANDBY power-down mode FULL power-down mode (Note 7) External reference = 4.096V Internal reference ±1/
C
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
= 4.096V; 4.7µF at REF pin; external clock, f
REF
CONDITIONS
610
700 850
60 120
±0.1 ±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
3.0
3.0 5.0
3.0 5
6.0
8
60
2.4 V
= 2.0MHz
CLK
UNITSMIN TYP MAXSYMBOLPARAMETER
400
1
18
2
100
0.8 V
±10 µAVIN= 0V or V
15 pF(Note 5)
V2.4 4.18Input Voltage Range
µA
VVDD- 50mV
V4.75 5.25V
mA
µA
LSB
µs
µs
ksps
ms
4 _______________________________________________________________________________________
Multirange, Single +5V, 12-Bit DAS
with 12-Bit Bus Interface
ELECTRICAL CHARACTERISTICS (continued)
(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V with 50% duty cycle; T
PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS
DIGITAL OUTPUTS (D11–D0, INT)
Output Low Voltage V Output High Voltage V Three-State Output Capacitance C
= T
to T
A
MIN
; unless otherwise noted. Typical values are at TA= +25°C.)
MAX
OL OH
OUT
SINK SOURCE
= 4.096V; 4.7µF at REF pin; external clock, f
REF
= 1.6mA
= 1mA
VDD- 1 VVDD= 4.75V, I
CLK
0.4 VVDD= 4.75V, I
15 pF(Note 5)
= 2.0MHz
TIMING CHARACTERISTICS
(VDD= 5V ±5%; unipolar/bipolar range; external reference mode, V with 50% duty cycle; T
PARAMETER SYMBOL MIN TYP MAX UNITS
CS Pulse Width t WR Pulse Width t CS to WR Setup Time CS to WR Hold Time t CS to RD Setup Time CS to RD Hold Time t CLK to WR Setup Time CLK to WR Hold Time t Data Valid to WR Setup Data Valid to WR Hold t RD Low to Output Data Valid RD High to Output Disable RD Low to INT High 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. Note 9: External acquisition timing: starts at data valid at ACQMOD = low control byte; ends 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 ±10V (MAX196) and ±4.096V (MAX198) input ranges.
= high control byte.
is measured with the load circuits of Figure 2 and defined as the time required for an output to cross 0.8V or 2.4V.
DO
is defined as the time required for the data lines to change by 0.5V.
TR
= T
to T
A
MIN
; unless otherwise noted.)
MAX
CONDITIONS
CS
WR
t
CSWS CSWH
t
CSRS CSRH
t
CWS CWH
t
DS
DH
t
DO
t
TR
t
INT1
= 4.096V, offset error nulled, ideal last code transition = FS - 3/2LSB.
REF
= tF= 5ns from a voltage level of 0.8V to 2.4V.
R
= 4.096V; 4.7µF at REF pin; external clock, f
REF
80 ns 80 ns
0 ns 0 ns 0 ns 0 ns
60 ns
0 ns
= 2.0MHz
CLK
100 ns
50 ns
120 nsFigure 2, CL= 100pF (Note 12)
70 ns(Note 13)
120 ns
with ACQMOD
MAX196/MAX198
_______________________________________________________________________________________ 5
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