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ADS7833N Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer ADS7833N
Beschreibung 10-Channel/ 12-Bit DATA ACQUISITION SYSTEM
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 12 Seiten
ADS7833N Datasheet, Funktion
® ADS7833
10-Channel, 12-Bit
DATA ACQUISITION SYSTEM
FEATURES
q 3 SIMULTANEOUS SAMPLED CHANNELS
q 3 SYNCHRONIZED 12-BIT ADCs
q 6.6µs THROUGHPUT RATE
q FULLY DIFFERENTIAL MUX INPUTS
q DIGITALLY SELECTABLE INPUT RANGES
q ±5V POWER SUPPLIES
q SERIAL DIGITAL INPUT/OUTPUTS
q 2 SIMULTANEOUS SAMPLED AUXILIARY
CHANNELS
q DIRECT INTERFACE TO MOTOROLA’S
DSP56004/7
DESCRIPTION
The ADS7833 consists of three 12-bit analog-to-digi-
tal converters preceded by three simultaneously oper-
ating sample-hold amplifiers, and multiplexers for 10
differential inputs. The ADCs have simultaneous se-
rial outputs for high speed data transfer and data
processing.
The ADS7833 also offers a programmable gain ampli-
fier with programmable gains of 1.0V/V, 1.25V/V,
2.5V/V, and 5.0V/V. Channel selection and gain se-
lection are selectable through the serial input control
word. The high through put rate is maintained by
simultaneously clocking in the 13-bit input control
word for the next conversion while the present conver-
sions are clocked out.
The part also contains an 8-bit digital-to-analog con-
verter whose digital input is supplied as part of the
input control word.
APPLICATIONS
q AC MOTOR SPEED CONTROLS
q THREE PHASE POWER CONTROL
q UNINTERRUPTABLE POWER SUPPLIES
q VIBRATION ANALYSIS
q PC DATA ACQUISITION
q MEDICAL INSTRUMENTATION
V1-1
V1-2
V1-3
V2-1
V2-2
V2-3
V3-1
V3-2
V3-3
V3-4
2
2
2
2
2
2
2
2
2
2
MUX1
MUX2
MUX3
CAP
2.5V
Ref
SH1 PGA1
ADC1
12-Bit
Serial Out1
SH2 PGA2
ADC2
12-Bit
Serial Out2
SH3 PGA3
ADC3
12-Bit
Control
Logic
Input Select
Gain Select
Input Setup
Register
DAC
DAC
8-Bit
Serial Out3
Serial IN
Voltage Out
Clock
Convert
Busy
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
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1994 Burr-Brown Corporation
PDS-11235C
ADPrSinte7d8in3U3.S.A. May, 1997
®






ADS7833N Datasheet, Funktion
TYPICAL PERFORMANCE CURVES (CONT)
At VANA+ = +5V, VANA– = –5V, VDIG+ = +5V, VDIG– = –5V and TA = 25°C, using internal reference, fCLOCK = 2.1MHz.
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0
–55
DAC OFFSET vs TEMPERATURE
–40 –25
0
25 70
Temperature (°C)
85
125
0
–0.05
–0.10
–0.15
–0.20
–0.25
–0.30
–0.35
–0.40
–0.45
–55
DAC FULL SCALE vs TEMPERATURE
–40 –25
0
25 70
Temperature (°C)
85
125
BASIC CIRCUIT CONFIGURATION
+5V GND
–5V GND
4.7µF 4.7µF
100nF 100nF
2.2µF
2.2µF
NC 10
V2-1N 11
V2-1P 12
NC 13
V2-2N 14
V2-2P 15
NC 16
V2-3N 17
V2-3P 18
NC 19
NC 20
NC 21
NC 22
NC 23
NC 24
NC 25
NC 26
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
ADS7833N
60 NC
59 V1-1N
58 V1-1P
57 NC
56 V1-2N
55 V1-2P
54 NC
53 V1-1N
52 V1-1N
51 NC
50 NC
49 NC
48 NC
47 NC
46 NC
45 NC
44 NC
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
IN–
IN+
®
ADS7833
4.7µF
100nF
4.7µF
+
100nF
+5V GND –5V
6
Ground Plane

6 Page









ADS7833N pdf, datenblatt
HV+
•••
+V
In 78L05 Out
+5V
0.1µF
0.1µF
1
28
0.01µF
ISO130
G = 8V/V
5
0.1µF
7
6
•••
VSENSE
+–
RSENSE
•••
34
HV
FIGURE 5. Typical Isolated Differential Analog Input.
Phase
A
Phase
B
Phase
C
ISO130
ISO130
ADS7833
V1 – 1
CLK
CONV
ASH
V2 – 1
SOUT1
ISO130
V3 – 1
SOUT2
Position
Sensor
Position
Sensor
IREF
V1 – 2
V1 – 3
V2 – 2
V2 – 3
SOUT3
REF
200
RTD
V3 – 2
V3 – 3
V3 – 4
SERIN
DC Link
Voltage
ISO122
Aux
Input
FIGURE 6. Motor Control Application Using Position Sensors.
®
ADS7833
12
ADS7833
+
V1 – 1
V1 – 1P
V1 – 1N
Typical
Analog
Input
V1 – 1CMV = 2.5V
V1– 1DIFF ±500mV
VSENSE ±62.5mV
DSP56004
SCKT
SCKR
SCK/SCL
SDO0
MISO/HAO
SOI0
SOI1
MOSI/HA0
SDO1

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