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Burr-Brown Corporation

ADS7804 Datasheet Preview

ADS7804 Datasheet

12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER

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® ADS7804
ADS7804
ADS7804
DEMO BOARD
AVAILABLE
12-Bit 10µs Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 100kHz min SAMPLING RATE
q STANDARD ±10V INPUT RANGE
q 72dB min SINAD WITH 45kHz INPUT
q ±0.45 LSB max INL
q DNL: 12 Bits “No Missing Codes”
q SINGLE +5V SUPPLY OPERATION
q PIN-COMPATIBLE WITH 16-BIT ADS7805
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 ADS7804 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 ADS7804 is specified at a 100kHz sampling rate,
and guaranteed over the full temperature range. Laser-
trimmed scaling resistors provide an industry-
standard ±10V input range, while the innovative de-
sign allows operation from a single +5V supply, with
power dissipation under 100mW.
The 28-pin ADS7804 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
±10V Input
20k
10k4k
CAP
REF
CDAC
Buffer
4k
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
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
©1992 Burr-Brown Corporation
PDS-1156C
Printed in U.S.A. February, 1996




Burr-Brown Corporation

ADS7804 Datasheet Preview

ADS7804 Datasheet

12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER

No Preview Available !

SPECIFICATIONS
ELECTRICAL
At TA = –40°C to +85°C, fS = 100kHz, and VDIG = VANA = +5V, using internal reference, unless otherwise specified.
ADS7804P, U
ADS7804PB, UB
PARAMETER
RESOLUTION
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
12 *
ANALOG INPUT
Voltage Ranges
Impedance
Capacitance
THROUGHPUT SPEED
Conversion Time
Complete Cycle
Throughput Rate
DC ACCURACY
Integral Linearity Error
Differential Linearity Error
No Missing Codes
Transition Noise(2)
Full Scale Error(3,4)
Full Scale Error Drift
Full Scale Error(3,4)
Full Scale Error Drift
Bipolar Zero Error(3)
Bipolar Zero Error Drift
Power Supply Sensitivity
(VDIG = VANA = VD)
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
Full-Power Bandwidth(6)
SAMPLING DYNAMICS
Aperture Delay
Aperture Jitter
Transient Response
Overvoltage Recovery(7)
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
(Must use external buffer.)
Internal Reference Drift
External Reference Voltage Range
for Specified Linearity
External Reference Current Drain
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
VOH
Leakage Current
Output Capacitance
Acquire and Convert
Ext. 2.5000V Ref
Ext. 2.5000V Ref
+4.75V < VD < +5.25V
fIN = 45kHz
fIN = 45kHz
fIN = 45kHz
fIN = 45kHz
FS Step
Ext. 2.5000V Ref
ISINK = 1.6mA
ISOURCE = 500µA
High-Z State,
VOUT = 0V to VDIG
High-Z State
±10V
23
35
5.7 8
10
100
Guaranteed
0.1
±7
±2
±2
±0.9
±0.9
±0.5
±0.5
±10
±0.5
*
*
*
*
**
*
±0.45
±0.45
*
*
±0.25
±5
±0.25
*
±10
*
*
80
–80
70
70
250
40
Sufficient to meet AC specs
2
150
2.48
2.3
2.5 2.52
1
8
2.5 2.7
100
*
72
72
*
*
*
*
*
*
*
*
*
*
*
*
*
*
–0.3
+2.0
+4
+0.8
VD +0.3V
±10
±10
*
*
Parallel 12 bits
Binary Two’s Complement
+0.4
*
±5
15
*
*
*
*
*
*
15
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
83 *
83 *
UNITS
Bits
V
k
pF
µs
µs
kHz
LSB(1)
LSB
Bits
LSB
%
ppm/°C
%
ppm/°C
mV
ppm/°C
LSB
dB(5)
dB
dB
dB
kHz
ns
µs
ns
V
µA
ppm/°C
V
µA
V
V
µA
µA
V
V
µA
pF
ns
ns
The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN
assumes no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject
to change without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not
authorize or warrant any BURR-BROWN product for use in life support devices and/or systems.
®
ADS7804
2


Part Number ADS7804
Description 12-Bit 10ms Sampling CMOS ANALOG-to-DIGITAL CONVERTER
Maker Burr-Brown Corporation
Total Page 10 Pages
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