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Details, datasheet, quote on part number:AD976AAN
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FEATURES Fast 16-Bit ADC 200 kSPS Throughput AD976A 100 kSPS Throughput AD976 Single 5 V Supply Operation Input Range: 10 V 100 mW Max Power Dissipation Choice of External or Internal 2.5 V Reference High Speed Parallel Interface On-Chip Clock 28-Lead Skinny DIP, SSOP or SOIC Packages
CAP
16-Bit, 100 kSPS/200 kSPS BiCMOS A/D Converters AD976/AD976A
FUNCTIONAL BLOCK DIAGRAM
REF R 4k VANA AGND1 2.5V REFERENCE
AD976/AD976A
4R VIN 4R 3 AGND2 CONTROL LOGIC & INTERNAL CALIBRATION CIRCUITRY R/C CS BUSY SWITCHED CAP ADC PARALLEL INTERFACE D15 D0
VDIG
CLOCK
R = 6k R = 3k
DGND AD976 AD976A
BYTE
GENERAL DESCRIPTION
PRODUCT HIGHLIGHTS
The AD976/AD976A is a high speed, low power 16-bit A/D converter that operates from a single 5 V supply. The part contains a successive approximation, switched capacitor ADC, an internal 2.5 V reference and a high speed parallel interface. The ADC is factory calibrated to minimize all linearity errors. The analog full-scale input is the standard industrial range of ± 10 V. The AD976/AD976A is comprehensively tested for ac parameters such as SNR and THD, as well as the more traditional parameters of offset, gain and linearity. The AD976/AD976A is fabricated on Analog Devices' proprietary BiCMOS process, which has high performance bipolar devices along with CMOS transistors. The AD976/AD976A is available in skinny 28-lead DIP, SSOP and SOIC packages.
1. Fast Throughput. The AD976/AD976A is a high speed (100 kSPS/200 kSPS throughput rates respectively), 16-bit ADC based on a switched capacitor architecture. 2. Single-Supply Operation. The AD976/AD976A operates from a single 5 V supply and dissipates only 100 mW max. 3. Comprehensive DC and AC Specifications. The AD976/AD976A is factory calibrated and fully tested for SNR and THD as well as the traditional specifications of offset, gain and linearity. 4. Complete A/D Solution. The AD976/AD976A offers a highly integrated solution containing an accurate ADC, reference and on-chip clock.
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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 rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781/329-4700 World Wide Web Site: http://www.analog.com Fax: 781/326-8703 © Analog Devices, Inc., 1999
AD976/AD976A
AD976ASPECIFICATIONS
Parameter RESOLUTION ANALOG INPUT Voltage Range Impedance Capacitance THROUGHPUT SPEED Complete Cycle Throughput Rate DC ACCURACY Integral Linearity Error Differential Linearity Error No Missing Codes Transition Noise2 Full-Scale Error3, 4 Full-Scale Error Drift Full-Scale Error, Ext. REF = 2.5 V Full-Scale Error Drift, Ext. REF = 2.5 V Bipolar Zero Error4 Bipolar Zero Error Drift Power Supply Sensitivity VANA = VDIG = VD = 5 V ± 5% AC ACCURACY Spurious Free Dynamic Range 5 Total Harmonic Distortion5 Signal to (Noise + Distortion)5 60 dB Input Signal to Noise5 Full-Power Bandwidth7 Input Bandwidth SAMPLING DYNAMICS Aperture Delay Transient Response Full-Scale Step Overvoltage Recovery8 REFERENCE Internal Reference Voltage Internal Reference Source Current External Reference Voltage Range for Specified Linearity External Reference Current Drain Ext. REF = 2.5 V DIGITAL INPUTS Logic Levels VIL V IH I IL I IH 2.48 Min 16 ± 10 13 22
(40 C to +85 C, FS = 200 kHz, Ref = Internal Reference, VDIG = VANA = +5 V unless otherwise noted)
Min 16 ± 10 13 22 5 5 200 ±3 +3 ±2 +1.75 1.0 ±7 ±2 ±2 ± 0.25 ± 0.25 ± 10 ±8 96 90 96 85 83 28 85 83 1 2.7 40 1 1 150 2.52 2.48 2.5 1 2.5 2.52 2.48 150 2.5 1 2.5 2.52 1 2.7 40 1 27 90 90 200 ±3 ±2 15 1.0 ±7 ±2 ±2 AD976AB Typ Max Min 16 ± 10 13 22 5 AD976AC Typ Max Units Bits V k pF µs kHz LSB 1 LSB Bit LSB % ppm/ °C % ppm/ °C mV ppm/ °C LSB dB 6 dB dB dB dB MHz MHz ns µs ns V µA V µA
AD976AA Typ Max
200
2 15 1.0 ±7 ±2 ±2
1 16
± 0.5 ± 0.5 ± 10 ±8
± 0.5 ± 0.5 ± 15 ±8
90 83 27 83 1 2.7 40
150 2.5 1 2.5
2.3
2.7 100
2.3
2.7 100
2.3
2.7 100
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
V V µA µA
NOTES 1 LSB means least significant bit. With a ± 10 V input, one LSB is 305 µV. 2 Typical rms noise at worst case transitions and temperatures. 3 Measured with fixed resistors as shown in Figure 5 (AD976) and Figure 6 (AD976A). Adjustable to zero as shown in Figure 7. 4 Full-scale error is expressed as the % difference between the actual full-scale code transition voltage and the ideal full-scale transition voltage and includes the effect of offset error. The full-scale error is the worst case of either the full-scale or +full-scale code transition voltage errors. 5 fIN = 20 kHz (AD976) and f IN = 45 kHz (AD976A), 0.5 dB down, unless otherwise noted. 6 All specifications in dB are referred to a full scale ± 10 V input. 7 Full-power bandwidth is defined as full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB or 10 bits of accuracy. 8 Recovers to specified performance after a 2 × FS input overvoltage. Specifications subject to change without notice.
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AD976/AD976A
AD976SPECIFICATIONS
Parameter RESOLUTION ANALOG INPUT Voltage Range Impedance Capacitance THROUGHPUT SPEED Complete Cycle Throughput Rate DC ACCURACY Integral Linearity Error Differential Linearity Error No Missing Codes Transition Noise2 Full-Scale Error3, 4 Full-Scale Error Drift Full-Scale Error, Ext. REF = 2.5 V Full-Scale Error Drift, Ext. REF = 2.5 V Bipolar Zero Error4 Bipolar Zero Error Drift Power Supply Sensitivity VANA = VDIG = VD = 5 V ± 5% AC ACCURACY Spurious Free Dynamic Range5 Total Harmonic Distortion5 Signal to (Noise + Distortion)5 60 dB Input Signal to Noise5 Full-Power Bandwidth7 Input Bandwidth SAMPLING DYNAMICS Aperture Delay Transient Response Full-Scale Step Overvoltage Recovery8 REFERENCE Internal Reference Voltage Internal Reference Source Current External Reference Voltage Range for Specified Linearity External Reference Current Drain Ext. REF = 2.5 V DIGITAL INPUTS Logic Levels VIL V IH IIL II H 2.48 Min 16
(40 C to +85 C, FS = 100 kHz, Ref = Internal Reference, VDIG = VANA = +5 V unless otherwise noted)
Max Min 16 AD976B Typ Max Min 16 ± 10 23 22 10 10 100 ±3 +3 ±2 +1.75 1.0 ±7 ±2 ±2 ± 0.25 ± 0.25 ± 10 ±8 96 90 96 85 83 28 85 83 700 1.5 40 2 2 150 2.52 2.48 2.5 1 2.5 2.52 2.48 150 2.5 1 2.5 2.52 700 1.5 40 2 27 90 90 100 ±3 ±2 15 1.0 ±7 ±2 ±2 ± 10 23 22 10 AD976C Typ Max Units Bits V k pF µs kHz LSB1 LSB Bit LSB % ppm/ °C % ppm/ °C mV ppm/ °C LSB dB 6 dB dB dB dB kHz MHz ns µs ns V µA V µA
AD976A Typ
± 10 23 22
100
2 15 1.0 ±7 ±2 ±2
1 16
± 0.5 ± 0.5 ± 10 ±8
± 0.5 ± 0.5 ± 15 ±8
90 83 27 83 700 1.5 40
150 2.5 1 2.5
2.3
2.7 100
2.3
2.7 100
2.3
2.7 100
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
0.3 +2.0
+0.8 VDIG + 0.3 ± 10 ± 10
V V µA µA
NOTES 1 LSB means least significant bit. With a ± 10 V input, one LSB is 305 µV. 2 Typical rms noise at worst case transitions and temperatures. 3 Measured with fixed resistors as shown in Figure 5 (AD976) and Figure 6 (AD976A). Adjustable to zero as shown in Figure 7. 4 Full-scale error is expressed as the % difference between the actual full-scale code transition voltage and the ideal full-scale transition voltage and includes the effect of offset error. The full-scale error is the worst case of either the full-scale or +full-scale code transition voltage errors. 5 fIN = 20 kHz (AD976) and fIN = 45 kHz (AD976A), 0.5 dB down, unless otherwise noted. 6 All specifications in dB are referred to a full scale ± 10 V input. 7 Full-power bandwidth is defined as full-scale input frequency at which signal-to-(noise + distortion) degrades to 60 dB or 10 bits of accuracy. 8 Recovers to specified performance after a 2 × FS input overvoltage. Specifications subject to change without notice.
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AD976/AD976A
Parameter DIGITAL OUTPUTS Data Format Data Coding V OL V OH Leakage Current Output Capacitance DIGITAL TIMING Bus Access Time Bus Relinquish Time POWER SUPPLIES Specified Performance V DIG V ANA IDIG IANA Power Dissipation TEMPERATURE RANGE Specified Performance
Specifications subject to change without notice.
Conditions
Min
All Grades Typ
Max
Units
ISINK = 1.6 mA ISOURCE = 500 µA High-Z State, VOUT = 0 V to VDIG High-Z State
Parallel 16 Bits Binary Twos Complement +0.4 +4 ±5 15 83 83
V V µA pF ns ns
4.75 4.75
5 5 3.0 11
5.25 5.25
100 40 +85
V V mA mA mW °C
TIMING SPECIFICATIONS (AD976A: F = 200 kHz; AD976: F = 100 kHz; 40 C to +85 C, V
S S
DIG = VANA = +5 V unless otherwise
noted)
Symbol Convert Pulsewidth Data Valid Delay after R/C Low (AD976A/AD976) BUSY Delay from R/C Low BUSY Low (AD976A/AD976) BUSY Delay after End of Conversion (AD976A/AD976) Aperture Delay Conversion Time (AD976A/AD976) Acquisition Time Bus Relinquish Time BUSY Delay after Data Valid (AD976A/AD976) Previous Data Valid after R/C Low (AD976A/AD976) Throughput Time (AD976A/AD976) R/C to CS Setup Time Time Between Conversions (AD976A/AD976) Bus Access and Byte Delay
Specifications subject to change without notice.
Min 50
Typ
Max 4.0/8.0 83 4.0/8.0
Units ns µs ns µs ns ns µs µs ns ns µs µs ns µs ns
t1 t2 t3 t4 t5 t6 t7 t8 t9 t10 t11 t 7 + t8 t12 t1 3 t14
180/360 40 3.8/7.6 1.0/2.0 10 50 35 180/360 3.7/7.4
4.0/8.0 83
5/10 10 5/10 10
83
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AD976/AD976A
ABSOLUTE MAXIMUM RATINGS 1
Analog Inputs V IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 25 V CAP . . . . . . . . . . . . . . . . +VANA + 0.3 V to AGND2 0.3 V REF . . . . . . . . . . . . . . . . . . . . . Indefinite Short to AGND2 Ground Voltage Differences DGND, AGND1, AGND2 . . . . . . . . . . . . . . . . . . . . ± 0.3 V Supply Voltages V ANA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V VDIG to VANA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 7 V V DIG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Digital Inputs . . . . . . . . . . . . . . . . . . . 0.3 V to VDIG + 0.3 V Internal Power Dissipation2 PDIP (N), SOIC (R), SSOP (RS) . . . . . . . . . . . . . 700 mW Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +150°C Storage Temperature Range (N, R, RS) . . . 65°C to +150°C Lead Temperature Range (Soldering 10 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . +300°C
NOTES 1 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. 2 Specification is for device in free air: 28-Lead PDIP: JA = 74°C/W; JC = 24°C/W, 28-Lead SOIC: JA = 72°C/W; JC = 23°C/W, 28-Lead SSOP: JA = 109°C/W; JC = 39°C/W.
PIN CONFIGURATION DIP, SOIC and SSOP Packages
VIN 1 AGND1 2 REF 3 28 VDIG 27 VANA 26 BUSY 25 CS
CAP 4 AGND2 5 D15 (MSB) 6 D14
AD976 AD976A
24 R/C
TOP VIEW 23 BYTE 7 (Not to Scale) 22 D0 (LSB) 21 D1 20 D2 19 D3 18 D4 17 D5 16 D6 15 D7
D13 8 D12 9 D11 10 D10 11 D9 12 D8 13 DGND 14
1.6mA
IOL
TO OUTPUT PIN
+2.1V CL 100pF 500 A IOH
Figure 1. Load Circuit for Digital Interface Timing
ORDERING GUIDE
Model AD976AN AD976BN AD976CN AD976AAN AD976ABN AD976ACN AD976AR AD976BR AD976CR AD976AAR AD976ABR AD976ACR AD976ARS AD976BRS AD976CRS AD976AARS AD976ABRS AD976ACRS
Temperature Range 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C 40°C to +85°C
Max INL ± 3.0 LSB ± 2.0 LSB ± 3.0 LSB ± 2.0 LSB ± 3.0 LSB ± 2.0 LSB ± 3.0 LSB ± 2.0 LSB ± 3.0 LSB ± 2.0 LSB ± 3.0 LSB ± 2.0 LSB
Min S/(N+D) 83 dB 85 dB 83 dB 83 dB 85 dB 83 dB 83 dB 85 dB 83 dB 83 dB 85 dB 83 dB 83 dB 85 dB 83 dB 83 dB 85 dB 83 dB
Throughput Rate 100 kSPS 100 kSPS 100 kSPS 200 kSPS 200 kSPS 200 kSPS 100 kSPS 100 kSPS 100 kSPS 200 kSPS 200 kSPS 200 kSPS 100 kSPS 100 kSPS 100 kSPS 200 kSPS 200 kSPS 200 kSPS
Package Descriptions 28-Lead, 300 mil Plastic DIP 28-Lead, 300 mil Plastic DIP 28-Lead, 300 mil Plastic DIP 28-Lead, 300 mil Plastic DIP 28-Lead, 300 mil Plastic DIP 28-Lead, 300 mil Plastic DIP 28-Lead Small Outline Package 28-Lead Small Outline Package 28-Lead Small Outline Package 28-Lead Small Outline Package 28-Lead Small Outline Package 28-Lead Small Outline Package 28-Lead Shrink Small Outline Package 28-Lead Shrink Small Outline Package 28-Lead Shrink Small Outline Package 28-Lead Shrink Small Outline Package 28-Lead Shrink Small Outline Package 28-Lead Shrink Small Outline Package
Package Options N-28B N-28B N-28B N-28B N-28B N-28B R-28 R-28 R-28 R-28 R-28 R-28 RS-28 RS-28 RS-28 RS-28 RS-28 RS-28
CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD976/AD976A features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
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