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Burr-Brown Corporation

ADS7815 Datasheet Preview

ADS7815 Datasheet

16-Bit 250kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER

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®
ADS7815
ADS7815
16-Bit 250kHz Sampling CMOS
ANALOG-to-DIGITAL CONVERTER
FEATURES
q 250kHz SAMPLING RATE
q COMPLETE WITH S/H, REF, CLOCK, ETC.
q 96dB min SFDR WITH 100kHz INPUT
q 84dB min SINAD
q ±2.5V INPUT RANGE
q 28-LEAD SOIC
APPLICATIONS
q WIRELESS BASE STATIONS
q SPECTRUM ANALYSIS
q IMAGING SYSTEMS
q DATA ACQUISITION
DESCRIPTION
The ADS7815 is a complete 16-bit sampling analog-
to-digital (A/D) converter featuring excellent AC
performance and a 250kHz throughput rate. The de-
sign includes a 16-bit capacitor-based SAR A/D
converter with an inherent sample and hold (S/H), a
precision reference, and an internal clock. Spurious-
free dynamic range with a 100kHz full-scale sinewave
input is typically greater than 100dB. The ±2.5V input
range allows development of precision systems using
only ±5V supplies. The converter is available in a
28-lead SOIC package specified for operation over
the industrial –25°C to +85°C temperature range.
±2.5V Input
REF Out/In
Clock
Successive Approximation Register and Control Logic
CDAC
Buffer
5k
Internal
+2.5V Ref
Comparator
Output
Latches
and
Three
State
Drivers
R/C
CS
BUSY
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
©1996 Burr-Brown Corporation
PDS-1364A
Printed in U.S.A. December, 1996




Burr-Brown Corporation

ADS7815 Datasheet Preview

ADS7815 Datasheet

16-Bit 250kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER

No Preview Available !

SPECIFICATIONS
At TA = –25°C to +85°C, fS = 250kHz, +VS = +5V, and –VS = –5V, using internal reference, unless otherwise specified.
ADS7815U
PARAMETER
RESOLUTION
ANALOG INPUT
Voltage Range
Impedance
Capacitance
THROUGHPUT SPEED
Conversion Cycle
Throughput Rate
DC ACCURACY
Integral Linearity Error
No Missing Codes
Transition Noise(2)
Full Scale Error(3)
Full Scale Error Drift
Bipolar Zero Error
Bipolar Zero Error Drift
Power Supply Sensitivity
AC ACCURACY
Spurious-Free Dynamic Range
Total Harmonic Distortion
Signal-to-(Noise+Distortion)
Signal-to-Noise
Usable Bandwidth(5)
Aperture Delay
REFERENCE
Internal Reference Voltage
Internal Reference Source Current
External Reference Voltage Range
External Reference Current Drain
DIGITAL INPUTS
Logic Levels
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Data Coding
VOL
VOH
Leakage Current
Output Capacitance
DIGITAL TIMING
Bus Access Time
Bus Relinquish Time
POWER SUPPLIES
+VS
–VS
+IS
–IS
Power Dissipation
TEMPERATURE RANGE
Specified Performance
Storage
CONDITIONS
Acquire and Convert
+VS ±5%, –VS ±5%
fIN = 100kHz
fIN = 100kHz
fIN = 100kHz
–60dB Input
fIN = 100kHz
VREF = +2.5V
ISINK = 1.6mA
ISOURCE = 200µA
High-Z State,
VOUT = 0V to VDIG
High-Z State
MIN
250
96
84
84
2.45
2.3
TYP
±2.5V
100
30
±4
15
0.8
±0.1
±7
±2
±2
±6
100
–98
28
1
40
2.5
1
2.5
MAX
16
4.0
–96
2.55
2.7
100
–0.3
+2.8
+0.8
+VS +0.3V
±10
±10
Parallel 16 bits
Binary Two’s Complement
+0.4
+4
±5
15
83
83
+4.75
–5.25
+5 +5.25
–5 –4.75
+30
–10
200 250
–25 +85
–55 +125
UNITS
Bits
V
M
pF
µs
kHz
LSB(1)
Bits
LSB
%
ppm/°C
mV
ppm/°C
LSB
dB(4)
dB
dB
dB
dB
MHz
ns
V
µA
V
µA
V
V
µA
µA
V
V
µA
pF
ns
ns
V
V
mA
mA
mW
°C
°C
NOTES: (1) LSB means Least Significant Bit. For the 16-bit, ±2.5V input ADS7815, one LSB is 76µV. (2) Typical rms noise at worst case transitions and
temperatures. (3) Full scale error is the worst case of –Full Scale or +Full Scale untrimmed deviation from ideal first and last code transitions, divided by the transition
voltage (not divided by the full-scale range) and includes the effect of offset error. (4) All specifications in dB are referred to a full-scale ±2.5V input. (5) Full-Power
Bandwidth defined as Full-Scale input frequency at which Signal-to-(Noise+Distortion) degrades to 60dB, or 10 bits of accuracy.
®
ADS7815
2


Part Number ADS7815
Description 16-Bit 250kHz Sampling CMOS ANALOG-to-DIGITAL CONVERTER
Maker Burr-Brown Corporation
Total Page 8 Pages
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