976A - ADC, 16 Bit, 200 kSPS

976A
16-Bit Analog to Digital Converter
4k
3k
12k
4k
Memory
Functional Block Diagram
FEATURES:
DESCRIPTION:
• RAD-PAK® radiation-hardened against natural space
radiation
• Total dose hardness:
> 100 krad (Si), depending upon space mission
• SEE Performance:
SEL and SEFI immune at LET = 85MeV cm2 and 125°C
• Package: 28 pin RAD-PAK® flat package
• 200 kHz max sampling rate
• Data Coding - Binary Twos Compliment
• ±10 V input range
• Single +5 V supply operation
• Utilizeses an internal or external reference
• Power dissipation: 100 mW max
Maxwell Technologies’ 976A high-speed 16-bit analog to digital converter, features a greater than 100 krad (Si) total dose
tolerance depending upon space mission, using Maxwell’s
radiation-hardened RAD-PAK® packaging technology. It is a 28
pin, 16-bit sampling analog to digital converter using state-ofthe-art BiCMOS structures. The 976A contains a 16-bit capacitor based SAR A/D with S/H, reference, clock and interface
for microprocessor use. The 976A is specified at a 200 kHz
sampling rate, and guaranteed over the full temperature
range.
Maxwell Technologies' patented RAD-PAK® packaging technology incorporates radiation shielding in the microcircuit package. It eliminates the need for box shielding while providing
the required radiation shielding for a lifetime in orbit or space
mission. In a GEO orbit, RAD-PAK® provides greater than 100
krad (Si) radiation dose tolerance. This product is available
with screening up to Maxwell Technologies’ self-defined Class
S.
04.17.14 Rev 3
(858) 503-3300- Fax: (858) 503-3301 - www.maxwell.com
All data sheets are subject to change without notice
1
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
TABLE 1. 976A PIN DESCRIPTION
PIN
SYMBOL
DESCRIPTION
1
VIN
Analog Input. Connect a 200 ohm resistor between VIN and the analog signal source. Full scale
input range is +10V.
2
AGND1
3
REF
Reference Input/Output. The internal +2.5V reference is available at this pin. Alternatively, an
external reference can be used to override the internal reference. In either case, connect a
2.2uF tantalum capacitor between REF and AGND1.
4
CAP
Referenced buffer Output. Connect a 2.2uF tantalum capacitor between CAP and AGND2.
5
AGND2
6
D15(MSB)
7-13
D14-D8
Data bits 14 -8.High impedence state when CS high or when R/C is Low.
14
DGND
Digital Ground.
15-21
D7-D1
Data Bits D7-D1. High impedence state when CS is high or when R/C is Low.
22
D0(LSB)
23
BYTE
24
R/C
Read/Convert Input. With CS LOW, a falling edge on R/C puts the internal sample/hold into the
hold state and starts a conversion; a rising edge enables the output data bits.
25
CS
Chip Selet Input. Internally OR’d with R/C. With R/C LOW, a falling edge on CS will initiate a
conversion. With R/C HIGH, a falling edge on CS will enable the output data bits. When CS is
HIGH, the output data bits will be in the Hi-impedence state.
26
BUSY
Busy output. Goes LOW when a conversion is started and remains LOW until the conversion is
completed and the data is latched into the output register. With CS tied LOW and R/C HIGH,
output data will be valid when BUSY rises. The rising edge of BUSY can be used to latch the
output data.
27
VANA
Analog Power Supply. Nominally +5V.
28
VDIG
Digital Power Supply. Nominally +5V.
Analog Ground. Used as ground reference point for REF pin..
Analog Ground.
Data Bit 15. Most significant bit of conversion result. High impedence state when CS is high or
when R/C is Low.
Memory
Data Bit 0. High impedence state when CS is high or when R/C is Low.
Byte Select. With Byte LOW, data will be output as indicated above; Pin 6 (D15) is the MSB,
Pin 22 (D0) is the LSB. Wtih BYTE HIGH, the top and bottom 8 bits of data will be switched;
D15-D8 are output on Pins 15-22 and D7-D0 are output on Pins 6-13.
-
TABLE 2. 976A ABSOLUTE MAXIMUM RATINGS
PARAMETER
Analog Inputs
- VIN
- CAP
- REF
MAX
UNIT
V
+25
+VANA + 0.3V TO AGND2 - 0.3V
Indefinite Short to Ground
04.17.14 Rev 3
All data sheets are subject to change without notice
2
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
TABLE 2. 976A ABSOLUTE MAXIMUM RATINGS
PARAMETER
MAX
Ground Voltage Differences:
- DGND
- AGND1
- AGND2
+0.3
+0.3
+ 0.3
UNIT
V
VANA
7
V
VDIG
7
V
VDIG to VANA
+7
V
Digital Inputs
-0.3V to VDIG + 0.3V
V
Junction Temperature
+150
°C
Operating Temperature
-55 to +125
°C
Weight
5.5
Grams
Thermal Resistance (Tjc)
1.3
°C/W
-65 to +150
°C
Storage Temperature
Memory
TABLE 3. 976A DC ACCURACY SPECIFICATIONS1
(SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
SUBGROUPS
MIN
TYP
MAX
UNIT
Integral Linearity Error
1,2, 3
-3
--
+3
LSB 2
Differential Linearity Error
1,2, 3
-1
--
4
LSB
No Missing Codes 3
1, 2, 3
15
--
--
Bits
--
1.0
--
LSB
--
+0.5
%
+0.6
%
±7
--
ppm/°C
Transition Noise 4
Full Scale Error 5,6
1, 2, 3
-0.5
Full Scale Error 5,6 (using ext. 2.5000 Vref)
1, 2, 3
-0.6
Full Scale Error Drift
--
Full Scale Error Drift (using ext. 2.5000 Vref)
--
--
±7
--
ppm/°C
1, 2, 3
-10
--
+10
mV
--
±2
--
ppm/°C
-12
--
+8
LSB
Bipolar Zero Error 5
Bipolar Zero Error Drift
Power Supply Sensitivity
1,2, 3
1. Unless otherwise specified, VREF = 2.5V, VIH = 2.0V, VIL = 0.8 V
2. LSB stands for Least Significant Bit. One LSB is equal to 305 µV.
3. Not tested.
4. Typical rms noise at worst case transitions and temperatures.
5. Measured with various fixed resistors.
6. For bipolar input ranges, full scale error is the worst case of -Full Scale or +Full Scale untrimmed deviation from ideal first and
last scale code transitions, divided by the transition voltage (not divided by the full-scale range) and includes the effect of offset error. For unipolar input ranges, full scale error is the deviation of the last code transition divided by the transition voltage.
It also includes the effect of offset error.
04.17.14 Rev 3
All data sheets are subject to change without notice
3
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
TABLE 4. DELTA LIMITS1
PARAMETER
VARIATION
+10% per Table 10
ICC
1) Parameters are measured and recorded as Delts per MIL-STD-883 for Class S devices.
TABLE 5. DIGITAL INPUTS
PARAMETER
SUB-GROUPS
MIN
MAX
UNITS
Input Voltage VIL1
1, 2, 3
-0.3
+0.8
V
Input Voltage VIH1
1, 2, 3
+2.0
VDIG +0.3
V
Input Current IIL
1, 2, 3
-10
10
uA
10
uA
Input Current IIH
1, 2, 3
-10
1. Tested by application of signal, VIL at 0.8V, VIH at 2.0V.
Memory
DIGITAL OUTPUTS
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
SUB-GROUPS
MIN
MAX
UNITS
0.4
V
5
uA
Data Formatting - 16 Bits
Data Coding - Binay Twos Compliment
VOL @ 1.6mA
1, 2, 3
IOL
1, 2, 3
-5
VOH @ 500uA
1, 2, 3
4
IOH
1, 2, 3
-5
V
5
uA
TABLE 6. 976A ANALOG INPUT AND THROUGHPUT SPEED
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
Voltage Ranges
Impedance1
SUBGROUPS
MIN
--
-10
MAX
UNIT
10
V
1, 2, 3
--
13
--
kohms
--
22
--
pF
1, 2, 3
--
--
15
pF
9, 10, 11
--
--
5
µs
9, 10, 11
200
--
--
kHz
Capacitance1
Output
Capcitance1
Complete Cycle (Acquire and Convert)
Throughput Rate
1. Not Tested.
2
TYP
2. Tested by application of signal at limit.
04.17.14 Rev 3
All data sheets are subject to change without notice
4
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
TABLE 7. 976A AC ACCURACY SPECIFICATIONS
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
SUBGROUPS
MIN
TYP
MAX
UNIT
Spurious-Free Dynamic Range, fIN = 20 kHz 1
4, 5, 6
90
--
--
dB 2
Total Harmonic Distortion, fIN = 20 kHz 1
4, 5, 6
--
--
-90
dB
Signal-to-Noise (Noise + Distortion) 1
fIN = 20 kHz
-60 dB Input
4, 5, 6
83
--
-27
---
Signal-to-Noise 1, fIN = 20 kHz
4, 5, 6
83
--
--
dB
--
1
--
MHz
dB
Full-Power Bandwidth 1,3
1. Not Tested
2. All specifications in dB are referred to a full-scale ±10 V input.
3. Full-Power Bandwidth defined as Full-Scale input frequency at which Signal-to-Noise (Noise + Distortion) degrades to 60 dB.
Memory
TABLE 8. 976A SAMPLING DYNAMICS
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
SUBGROUPS
MIN
TYP
Input Bandwidth
MAX
2.7
Aperture Delay
--
Aperture Jitter
9, 10, 11
Transient Response FS Step2
9, 10, 11
Overvoltage Recovery 1
UNIT
MHz
40
--
ns
Sufficient to meet AC specification
--
--
1
us
--
150
--
ns
1. Recovers to specified performance after 2 X FS input overvoltage.
2. Not Tested
TABLE 9. 976A REFERENCE
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNIT
Internal Reference Voltage
No Load
2.48
2.5
2.52
V
Internal Reference Source Current (Must be
ext. buffer)
--
1
--
µA
External Reference Voltage Range for Specified Linearity 1
--
2.5
--
V
--
--
100
µA
External Reference Current Drain
2.30V & 2.70V
1. Tested by application of signal at 2.5V +/- 0.02V.
04.17.14 Rev 3
All data sheets are subject to change without notice
5
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
TABLE 10. 976A POWER SUPPLIES
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
PARAMETER
SUBGROUPS
CONDITIONS
MIN
TYP
MAX
UNIT
Must be < VANA
4.75
5
5.25
V
VDIG
1, 2, 3
VANA
1, 2, 3
4.75
5
5.25
V
IDIG
--
--
--
5
mA
IANA
--
--
--
15
mA
Icc
1, 2, 3
IDIG + IANA @ 200kHz
20
mA
Power Dissipation
1, 2, 3
VANA = VDIG = 5V
fs = 200 kHz
mW
--
--
100
TABLE 11. 976A CONVERSION AND DATA TIMING
SPECIFIED PERFORMANCE -55TO +125°C, VDIG=VANA = 5V +/- 5%)
DESCRIPTION
SUBGROUPS
MIN
TYP
MAX
UNIT
t11
Convert Pulse Width
9, 10, 11
50
--
--
ns
t2
Data Valid Delay after R/C Low
9, 10, 11
--
--
4.0
µs
t3
BUSY Delay
9, 10, 11
--
--
100
ns
t4
BUSY LOW
9, 10, 11
--
--
4.0
us
t5
BUSY Delay after End of Conversion
--
--
180
--
ns
t6
Aperture Delay
--
--
40
--
ns
t72
Conversion Time
9, 10, 11
--
3.8
4.0
µs
t82
Acquisition Time
9, 10, 11
1.0
--
--
µs
t9
Bus Relinquish Time
9, 10, 11
10
35
83
ns
t10
BUSY Delay after Data Valid
9, 10, 11
50
180
--
ns
t11
Previous Data Valid after R/C Low
--
--
3.7
--
us
Throughput Time
9, 10, 11
--
--
5
µs
t121
R/C to CS Setup Time
9, 10, 11
10
--
--
ns
t131
Time Between Conversions
9, 10, 11
5
--
--
µs
t14
Bus Access and Byte Delay
9, 10, 11
5
--
83
ns
t7 + t8
Memory
SYMBOL
1. Tested by application of signal at limit.
2. Internal timing specification, not directly measured.
04.17.14 Rev 3
All data sheets are subject to change without notice
6
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
FIGURE 1. CONVERSION TIMING WITH CS\ LOW
Memory
FIGURE 2. CS\ TO CONTROL CONVERSION & READ TIMING
04.17.14 Rev 3
All data sheets are subject to change without notice
7
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
FIGURE 3. USING CS AND BYTE TO CONTROL DATA BUS READ TIMING
Memory
04.17.14 Rev 3
All data sheets are subject to change without notice
8
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
Memory
28-PIN RAD-PAK® FLAT PACKAGE
DIMENSION
SYMBOL
MIN
NOM
MAX
A
0.119
0.132
0.145
b
0.015
0.017
0.019
c
0.004
0.005
0.006
D
0,792
0.800
0.808
E
0.405
0.410
0.415
E1
0.245
0.250
0.255
E2
0.030
0.080
--
e
0.050 BSC
L
0.390
0.400
0.410
Q
0.024
0.030
0.036
S1
0.020
0.067
--
N
28
Note: All dimensions in inches
Top and Bottom of package internally connected to ground.
04.17.14 Rev 3
All data sheets are subject to change without notice
9
©2014 Maxwell Technologies
All rights reserved.
16-Bit Analog to Digital Converter
976A
Important Notice:
These data sheets are created using the chip manufacturers published specifications. Maxwell Technologies verifies
functionality by testing key parameters either by 100% testing, sample testing or characterization.
The specifications presented within these data sheets represent the latest and most accurate information available to
date. However, these specifications are subject to change without notice and Maxwell Technologies assumes no
responsibility for the use of this information.
Maxwell Technologies’ products are not authorized for use as critical components in life support devices or systems
without express written approval from Maxwell Technologies.
Any claim against Maxwell Technologies must be made within 90 days from the date of shipment from Maxwell Technologies. Maxwell Technologies’ liability shall be limited to replacement of defective parts.
Memory
04.17.14 Rev 3
All data sheets are subject to change without notice
10
©2014 Maxwell Technologies
All rights reserved.
976A
16-Bit Analog to Digital Converter
Product Ordering Options
Model Number
976A
RP
F
X
Option Details
Feature
Monolythic1
S= Maxwell Self-Defined Class S
B = Maxwell Self-Defined Class B
I = Industrial (testing @ -55°C,
+25°C, +85°C)
E = Engineering (testing @ +25°C)
Package
F = Flat Pack
Radiation Feature
RP = RAD-PAK® package
Base Product
Nomenclature
16-Bit Analog to Digital Converter
Memory
Screening Flow
1) Products are manufactured and screened to Maxwell Technologies self-defined Class B and Class S flows.
04.17.14 Rev 3
All data sheets are subject to change without notice
11
©2014 Maxwell Technologies
All rights reserved.
Similar pages