ADA494 [ADI]
16-Bit, 1 MSPS PulSAR ADC in MSOP QFN; 16位， 1 MSPS的PulSAR ADC ，采用MSOP QFN
| 型号： | ADA494 |
| 厂家： | 
ADI |
| 描述： | 16-Bit, 1 MSPS PulSAR ADC in MSOP QFN |
| 文件： | 总12页 (文件大小：292K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
16-Bit, 1 MSPS PulSAR ADC in MSOP/QFN
AD7980-EP
APPLICATION DIAGRAM EXAMPLE
FEATURES
2.5V TO 5V
2.5V
16-bit resolution with no missing codes
Throughput: 1 MSPS
Low power dissipation: 7.0 mW @ 1 MSPS, 70 µW @ 10 kSPS
INL: 1.5 LSB typical, 1.25 LSB maximum
SINAD: 91.5 dB @ 10 kHz
VIO
SDI
1.8V TO 5.0V
REF VDD
0 TO VREF
IN+
IN–
SCK
SDO
CNV
AD7980-EP
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
THD: −114 dB @ 10 kHz
Pseudo differential analog input range
0 V to VREF with VREF between 2.5 V to 5.5 V
Any input range and easy to drive with the ADA4841
No pipeline delay
GND
Figure 1.
GENERAL DESCRIPTION
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V
logic interface
The AD7980-EP is a 16-bit, successive approximation, analog-
to-digital converter (ADC) that operates from a single power
supply, VDD. It contains a low power, high speed, 16-bit
sampling ADC and a versatile serial interface port. On the CNV
rising edge, it samples an analog input IN+ between 0 V to REF
with respect to a ground sense IN−. The reference voltage, REF,
is applied externally and can be set independent of the supply
voltage, VDD. Its power scales linearly with throughput.
Serial interface SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
Daisy-chain multiple ADCs and busy indicator
Supports defense and aerospace applications (AQEC)
Controlled manufacturing baseline
One assembly/test site
One fabrication site
Enhanced product change notification
Qualification data available on request
10-lead MSOP
The SPI-compatible serial interface also features the ability,
using the SDI input, to daisy-chain several ADCs on a single,
3-wire bus and provides an optional busy indicator. It is
compatible with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate
supply VIO.
Military temperature range: −55°C to +125°C
APPLICATIONS
Battery-powered equipment
Communications
ATE
Data acquisitions
Medical instruments
The AD7980-EP is housed in a 10-lead MSOP with operation
specified from −55°C to +125°C.
Table 1. MSOP, QFN (LFCSP) 14-/16-/18-Bit PulSAR® ADC
Type
100 kSPS
250 kSPS
400 kSPS to 500 kSPS
1000 kSPS
ADC Driver
ADA4941
ADA4841
ADA4941
ADA4841
18-Bit
AD76911
AD76901
AD79821
16-Bit
AD7680
AD7683
AD7684
AD7940
AD76851
AD76871
AD7694
AD79421
AD76861
AD76881
AD76931
AD79461
AD79801
14-Bit
1 Pin-for-pin compatible.
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
www.analog.com
©2010 Analog Devices, Inc. All rights reserved.
AD7980-EP
TABLE OF CONTENTS
Features .............................................................................................. 1
Absolute Maximum Ratings ............................................................6
ESD Caution...................................................................................6
Pin Configurations and Function Descriptions............................7
Typical Performance Characteristics ..............................................8
Outline Dimensions....................................................................... 12
Ordering Guide .......................................................................... 12
Applications....................................................................................... 1
Application Diagram Example........................................................ 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Timing Specifications....................................................................... 5
REVISION HISTORY
9/10 —Revision 0: Initial Version
Rev. 0 | Page 2 of 12
AD7980-EP
SPECIFICATIONS
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, VREF = 5 V, TA = –55°C to +125°C, unless otherwise noted.
Table 2.
Parameter
Conditions
Min
Typ
Max
Unit
RESOLUTION
16
Bits
ANALOG INPUT
Voltage Range
Absolute Input Voltage
IN+ − IN−
IN+
IN−
0
−0.1
−0.1
VREF
VREF + 0.1
+0.1
V
V
V
Analog Input CMRR
Leakage Current @ 25°C
ACCURACY
fIN = 100 kHz
Acquisition phase
60
1
dB
nA
No Missing Codes
Differential Linearity Error
16
−0.9
Bits
REF = 5 V
REF = 2.5 V
REF = 5 V
REF = 2.5 V
REF = 5 V
REF = 2.5 V
0.4
0.55
0.6
0.65
0.6
1.0
2
0.35
0.08
0.54
0.1
+0.9
+1.5
LSB1
LSB1
LSB1
LSB1
LSB1
LSB1
LSB1
ppm/°C
mV
Integral Linearity Error
Transition Noise
−1.5
2
Gain Error, TMIN to TMAX
Gain Error Temperature Drift
Zero Error, TMIN to TMAX
Zero Temperature Drift
Power Supply Sensitivity
2
−0.62
0
+0.62
ppm/°C
LSB1
VDD = 2.5 V ± 5%
THROUGHPUT
Conversion Rate
VIO ≥ 2.3 V up to 85°C, VIO ≥
3.3 V above 85°C up to 125°C
Full-scale step
1
MSPS
ns
Transient Response
AC ACCURACY
290
Dynamic Range
VREF = 5 V
VREF = 2.5 V
fO = 10 kSPS
fIN = 10 kHz, VREF = 5 V
fIN = 10 kHz, VREF = 2.5 V
fIN = 10 kHz
fIN = 10 kHz
fIN = 10 kHz, VREF = 5 V
fIN = 10 kHz, VREF = 2.5 V
92
87
111
91
86.5
−110
−114
91.5
87.0
dB3
dB3
dB3
dB3
dB3
dB3
dB3
dB3
dB3
Oversampled Dynamic Range
Signal-to-Noise Ratio, SNR
Spurious-Free Dynamic Range, SFDR
Total Harmonic Distortion, THD
Signal-to-(Noise + Distortion), SINAD
1 LSB means least significant bit. With the 5 V input range, 1 LSB is 76.3 µV.
2 These specifications include full temperature range variation, but not the error contribution from the external reference.
3 All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full scale, unless otherwise specified.
Rev. 0 | Page 3 of 12
AD7980-EP
VDD = 2.5 V, VIO = 2.3 V to 5.5 V, VREF = 5 V, TA = –55°C to +125°C, unless otherwise noted.
Table 3.
Parameter
REFERENCE
Voltage Range
Load Current
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Aperture Delay
DIGITAL INPUTS
Logic Levels
VIL
Conditions
Min
Typ
Max
Unit
2.4
5.1
V
µA
1 MSPS, REF = 5 V
VDD = 2.5 V
330
10
2.0
MHz
ns
VIO > 3V
VIO > 3V
VIO ≤ 3V
VIO ≤ 3V
–0.3
0.7 × VIO
–0.3
0.9 × VIO
−1
−1
0.3 × VIO
VIO + 0.3
0.1 × VIO
VIO + 0.3
+1
V
V
VIH
VIL
VIH
IIL
µA
µA
µA
IIH
+1
DIGITAL OUTPUTS
Data Format
Pipeline Delay
Serial 16 bits straight binary
Conversion results available immediately
after completed conversion
VOL
VOH
ISINK = 500 µA
ISOURCE = −500 µA
0.4
V
V
VIO − 0.3
POWER SUPPLIES
VDD
VIO
2.375
2.3
2.5
2.625
5.5
V
V
Specified performance
VIO Range
Standby Current1, 2
Power Dissipation
1.8
5.5
V
nA
µW
mW
VDD and VIO = 2.5 V, 25°C
10 kSPS throughput
1 MSPS throughput
0.35
70
7.0
7.0
10
Energy per Conversion
TEMPERATURE RANGE
Specified Performance
nJ/sample
TMIN to TMAX
−55
+125
°C
1 With all digital inputs forced to VIO or GND as required.
2 During the acquisition phase.
Rev. 0 | Page 4 of 12
AD7980-EP
TIMING SPECIFICATIONS
−55°C to +125°C, VDD = 2.37 V to 2.63 V, VIO = 3.3 V to 5.5 V, unless otherwise stated. See Figure 2 and Figure 3 for load conditions.
Table 4.
Parameter
Symbol
tCONV
tACQ
tCYC
tCNVH
tSCK
Min
500
290
1000
10
Typ
Max
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Conversion Time: CNV Rising Edge to Data Available
Acquisition Time
Time Between Conversions
710
CNV Pulse Width (CS Mode)
SCK Period (CS Mode)
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
SCK Period (Chain Mode)
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
VIO Above 2.3 V
SCK Low Time
SCK High Time
SCK Falling Edge to Data Remains Valid
SCK Falling Edge to Data Valid Delay
VIO Above 4.5 V
VIO Above 3 V
VIO Above 2.7 V
10.5
12
13
15
tSCK
11.5
13
14
16
4.5
4.5
3
tSCKL
tSCKH
tHSDO
tDSDO
9.5
11
12
14
ns
ns
ns
ns
VIO Above 2.3 V
CNV or SDI Low to SDO D15 MSB Valid (CS Mode)
VIO Above 3 V
VIO Above 2.3 V
tEN
10
15
20
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
CNV or SDI High or Last SCK Falling Edge to SDO High Impedance (CS Mode)
SDI Valid Setup Time from CNV Rising Edge
SDI Valid Hold Time from CNV Rising Edge (CS Mode)
SDI Valid Hold Time from CNV Rising Edge (Chain Mode)
SCK Valid Setup Time from CNV Rising Edge (Chain Mode)
SCK Valid Hold Time from CNV Rising Edge (Chain Mode)
SDI Valid Setup Time from SCK Falling Edge (Chain Mode)
SDI Valid Hold Time from SCK Falling Edge (Chain Mode)
SDI High to SDO High (Chain Mode with Busy Indicator)
tDIS
tSSDICNV
tHSDICNV
tHSDICNV
tSSCKCNV
tHSCKCNV
tSSDISCK
tHSDISCK
tDSDOSDI
5
2
0
5
5
2
3
15
1
Y% VIO
500µA
I
OL
1
X% VIO
tDELAY
tDELAY
2
2
V
V
V
IH
IH
1.4V
TO SDO
2
2
V
IL
IL
C
L
20pF
1
2
FOR VIO ≤ 3.0V, X = 90 AND Y = 10; FOR VIO > 3.0V X = 70, AND Y = 30.
MINIMUM V AND MAXIMUM V USED. SEE DIGITAL INPUTS
500µA
I
OH
IH
IL
SPECIFICATIONS IN TABLE 3.
Figure 2. Load Circuit for Digital Interface Timing
Figure 3. Voltage Levels for Timing
Rev. 0 | Page 5 of 12
AD7980-EP
ABSOLUTE MAXIMUM RATINGS
Table 5.
Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.
Parameter
Rating
Analog Inputs
IN+, IN− to GND
Supply Voltage
REF, VIO to GND
VDD to GND
VDD to VIO
−0.3 V to VREF + 0.3 V or 130 ꢀA
−0.3 V to +6 V
−0.3 V to +3 V
+3 V to −6 V
Digital Inputs to GND
Digital Outputs to GND
Storage Teꢀperature Range
Junction Teꢀperature
−0.3 V to VIO + 0.3 V
−0.3 V to VIO + 0.3 V
−65°C to +150°C
150°C
ESD CAUTION
θJA Therꢀal Iꢀpedance
(10-Lead MSOP)
200°C/W
θJC Therꢀal Iꢀpedance
(10-Lead MSOP)
44°C/W
Lead Teꢀperature
Vapor Phase (60 sec)
Infrared (15 sec)
215°C
220°C
Rev. 0 | Page 6 of 12
AD7980-EP
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
REF
VDD
IN+
1
2
3
4
5
10 VIO
9
8
7
6
SDI
AD7980-EP
SCK
SDO
CNV
TOP VIEW
(Not to Scale)
IN–
GND
Figure 4. 10-Lead MSOP Pin Configuration
Table 6. Pin Function Descriptions
Pin No.
Mnemonic
REF
VDD
IN+
1
2
3
4
5
6
7
8
9
10
IN−
GND
CNV
SDO
SCK
SDI
VIO
Rev. 0 | Page 7 of 12
AD7980-EP
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, unless otherwise noted.
1.25
1.00
0.75
0.50
0.25
0
POSITIVE INL: +0.33 LSB
NEGATIVE INL: –0.39 LSB
POSITIVE INL: +0.18 LSB
NEGATIVE INL: –0.21 LSB
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
–0.25
–0.50
–0.75
–1.00
0
16384
32768
CODE
49152
65536
0
16384
32768
CODE
49152
65536
Figure 5. Integral Nonlinearity vs. Code, REF = 5 V
Figure 8. Differential Nonlinearity vs. Code, REF = 5 V
1.25
1.00
0.75
0.50
0.25
0
1.00
0.75
0.50
0.25
0
POSITIVE INL: +0.47 LSB
NEGATIVE INL: –0.26 LSB
POSITIVE INL: +0.25 LSB
NEGATIVE INL: –0.22 LSB
–0.25
–0.50
–0.75
–1.00
–1.25
–0.25
–0.50
–0.75
–1.00
0
16384
32768
CODE
49152
65536
0
16384
32768
CODE
49152
65536
Figure 6. Integral Nonlinearity vs. Code, REF = 2.5 V
Figure 9. Differential Nonlinearity vs. Code, REF = 2.5 V
0
0
fS = 1 MSPS
fS = 1 MSPS
fIN = 10kHz
fIN = 10kHz
–20
–40
–20
–40
SNR = 91.27dB
THD = –114.63dB
SFDR = 110.10dB
SINAD = 91.25dB
SNR = 86.8dB
THD = –111.4dB
SFDR = 105.9dB
SINAD = 86.8dB
–60
–60
–80
–80
–100
–120
–140
–160
–180
–100
–120
–140
–160
–180
0
100
200
300
400
500
0
100
200
300
400
500
FREQUENCY (kHz)
FREQUENCY (kHz)
Figure 7. FFT Plot, REF = 5 V
Figure 10. FFT Plot, REF = 2.5 V
Rev. 0 | Page 8 of 12
AD7980-EP
180k
160k
140k
120k
100k
80k
60k
40k
20k
0
60k
50k
40k
30k
20k
10k
0
168591
52212
32417
31340
52710
38751
7225
6807
539
502
1201
16
14
27
829 33
0
0
0
0
0
0
2
0
0
0
8003 8004 8005 8006 8007 8008 8009 800A 800B 800C 800D 800E 800F
7FFA 7FFB 7FFC 7FFD 7FFE 7FFF 8000 8001 8002 8003 8004 8005 8006
CODE IN HEX
CODE IN HEX
Figure 14. Histogram of a DC Input at the Code Center, REF = 2.5 V
Figure 11. Histogram of a DC Input at the Code Center, REF = 5 V
95
94
93
92
91
90
89
88
87
86
85
70k
59691
59404
60k
50k
40k
30k
20k
10k
6295
5428
150
0
93
0
2
3
0
–10
–9
–8
–7
–6
–5
–4
–3
–2
–1
0
7FFF 8000 8001 8002 8003 8004 8005 8006 8007 8008
CODE IN HEX
INPUT LEVEL (dB OF FULL SCALE)
Figure 15. SNR vs. Input Level
Figure 12. Histogram of a DC Input at the Code Transition, REF = 5 V
–95
–100
–105
–110
–115
–120
–125
115
100
95
90
85
80
16
15
14
13
12
SNR
SINAD
ENOB
110
105
100
95
SFDR
THD
90
85
5.25
2.25
2.75
3.25
3.75
4.25
4.75
2.25
2.75
3.25
3.75
4.25
4.75
5.25
REFERENCE VOLTAGE (V)
REFERENCE VOLTAGE (V)
Figure 16. THD, SFDR vs. Reference Voltage
Figure 13. SNR, SINAD, and ENOB vs. Reference Voltage
Rev. 0 | Page 9 of 12
AD7980-EP
100
–85
–90
95
90
85
–95
–100
–105
–110
–115
–120
–125
80
10
100
1000
10
100
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
Figure 17. SINAD vs. Frequency
Figure 20. THD vs. Frequency
95
93
91
89
87
85
–110
–112
–114
–116
–118
–120
–55
–35
–15
5
25
45
65
85
105
125
–55
–35
–15
5
25
45
65
85
105
125
TEMPERATURE (°C)
TEMPERATURE (°C)
Figure 21. THD vs. Temperature
Figure 18. SNR vs. Temperature
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
I
VDD
I
VDD
I
I
REF
REF
I
VIO
I
VIO
–55
–35
–15
5
25
45
65
85
105
125
2.375
2.425
2.475
2.525
2.575
2.625
TEMPERATURE (°C)
VDD VOLTAGE (V)
Figure 22. Operating Currents vs. Temperature
Figure 19. Operating Currents vs. Supply
Rev. 0 | Page 10 of 12
AD7980-EP
8
7
6
5
4
3
2
1
I
+ I
VIO
VDD
0
–55
–35
–15
5
25
45
65
85
105
125
TEMPERATURE (°C)
Figure 23. Power-Down Currents vs. Temperature
Rev. 0 | Page 11 of 12
AD7980-EP
OUTLINE DIMENSIONS
3.10
3.00
2.90
10
1
6
5
5.15
4.90
4.65
3.10
3.00
2.90
PIN 1
IDENTIFIER
0.50 BSC
0.95
0.85
0.75
15° MAX
1.10 MAX
0.70
0.55
0.40
0.15
0.05
0.23
0.13
6°
0°
0.30
0.15
COPLANARITY
0.10
COMPLIANT TO JEDEC STANDARDS MO-187-BA
Figure 24.10-Lead Mini Small Outline Package [MSOP]
(RM-10)
Dimensions shown in millimeters
ORDERING GUIDE
Integral
Nonlinearity
Ordering
Quantity
Package
Option
Model
AD7980SRMZ-EP-RL71
Temperature Range
Package Description
Branding
1.5 LSB max
−55°C to +125°C
Reel, 1,000
10-Lead MSOP
RM-10
C78
1 Z = RoHS Compliant Part.
©2010 Analog Devices, Inc. All rights reserved. Trademarks and
registered trademarks are the property of their respective owners.
D09304-0-9/10(0)
Rev. 0 | Page 12 of 12
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