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PDF ADS7820UB Data sheet ( Hoja de datos )
| Número de pieza | ADS7820UB | |
| Descripción | 12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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® ADS7820
ADS7820
ADS7820
12-Bit 10µs Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz min SAMPLING RATE
q 0 to +5V INPUT RANGE
q 72dB min SINAD WITH 45kHz INPUT
q ±1/2 LSB max INL AND DNL
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 16-BIT ADS7821
q USES INTERNAL OR EXTERNAL
REFERENCE
q COMPLETE WITH S/H, REF, CLOCK, ETC.
q FULL PARALLEL DATA OUTPUT
q 100mW max POWER DISSIPATION
q 28-PIN 0.3" PLASTIC DIP AND SOIC
DESCRIPTION
The ADS7820 is a complete 12-bit sampling A/D
using state-of-the-art CMOS structures. It contains a
complete 12-bit, capacitor-based SAR A/D with S/H,
reference, clock, interface for microprocessor use, and
three-state output drivers.
The ADS7820 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide a 0 to +5V input
range, with power dissipation under 100mW.
The 28-pin ADS7820 is available in a plastic 0.3" DIP
and in an SOIC, both fully specified for operation over
the industrial –40°C to +85°C range.
Clock
Successive Approximation Register and Control Logic
R/C
CS
BYTE
BUSY
0 to +5V Input
5kΩ
6.66kΩ 20kΩ
CAP
REF
CDAC
Buffer
4kΩ
Internal
+2.5V Ref
Comparator
Output
Latches
and
Three
State
Drivers
Three
State
Parallel
Data
Bus
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1996 Burr-Brown Corporation
PDS1-1322
ADPrSint7ed8in2U0.S.A. June, 1996
®
1 page  
TYPICAL PERFORMANCE CURVES
At TA = –40°C to +85°C, fS = 100kHz, VDIG = VANA = +5V, using internal reference, unless otherwise specified.
INTERNAL REFERENCE VOLTAGE vs TEMPERATURE
2.52
2.515
2.51
2.505
2.5
2.495
2.49
2.485
2.48
–40 –15
10
35
60
Temperature (°C)
85
6.2
6.1
6
5.9
5.8
5.7
5.6
5.5
5.4
–40
CONVERSION TIME vs TEMPERATURE
–15 10 35 60
Temperature (°C)
85
ADS7820 AT +25°C
0.2
+0.1
0
–0.1
–0.2
Min/Max INL Errors
–0.051 at 03962
0.086 at 02048
0 512 1024 1536 2048 2560 3072 3584 4096
Decimal Code
ADS7820 AT +25°C
0.2
+0.1
0
–0.1
–0.2
Min/Max DNL Errors
–0.073 at 00512
0.087 at 02047
0 512 1024 1536 2048 2560 3072 3584 4096
Decimal Code
®
5 ADS7820
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ADS7820UB.PDF ] | |
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