The ADS824 is a pipeline, CMOS analog-to-digital converter
that operates from a single +5V power supply. This converter
provides excellent performance with a single-ended input and
can be operated with a differential input for added spurious
performance. This high performance converter includes a 10-bit
quantizer, high bandwidth track/hold, and a high accuracy
internal reference. It also allows for the user to disable the
internal reference and utilize external references. This external
reference option provides excellent gain and offset matching
when used in multi-channel applications or in applications
where full scale range adjustment is required.
The ADS824 employs digital error correction techniques to
provide excellent differential linearity for demanding imaging
applications. Its low distortion and high SNR give the extra
margin needed for medical imaging, communications, video,
and test instrumentation. The ADS824 offers power dissipa-
tion of 315mW and also provides a power-down mode, thus
reducing power dissipation to only 20mW.
The ADS824 is specified at a maximum sampling frequency of
70MHz and a single-ended input range of 1.5V to 3.5V. The
ADS824 is available in a 28-lead SSOP package and is pin
compatible with the 10-bit, 40MHz ADS822 and the 10-bit,
60MHz ADS823.
+V
S
ADS824
Timing
Circuitry
CLK
VDRV
APPLICATIONS
q
q
q
q
MEDICAL IMAGING
HDTV VIDEO DIGITIZING
COMMUNICATIONS
TEST EQUIPMENT
V
IN
IN
IN
T/H
10-Bit
Pipelined
A/D Core
Error
Correction
Logic
3-State
Outputs
D0
•
•
•
D9
CM
Internal
Reference
Optional External
Reference
Int/Ext
PD
OE
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
= full specified temperature range, single-ended input range = 1.5V to 3.5V, sampling rate = 70MHz, external reference, unless otherwise noted.
ADS824E
PARAMETER
POWER SUPPLY REQUIREMENTS
Supply Voltage: +V
S
Supply Current: +I
S
Output Driver Supply Current (VDRV)
Power Dissipation: VDRV = 5V
VDRV = 3V
VDRV = 5V
VDRV = 3V
Power Down
Thermal Resistance,
θ
JA
28-Lead SSOP
CONDITIONS
Operating
Operating
External Reference
External Reference
Internal Reference
Internal Reference
Operating
MIN
+4.75
TYP
+5.0
66
9
330
315
345
335
20
89
MAX
+5.25
UNITS
V
mA
mA
mW
mW
mW
mW
mW
°C/W
375
NOTES: (1) Spurious Free Dynamic Range refers to the magnitude of the largest harmonic. (2) dBFS means dB relative to Full Scale. (3) Two-tone
intermodulation distortion is referred to the largest fundamental tone. This number will be 6dB higher if it is referred to the magnitude of the two-tone fundamental
envelope. (4) Effective number of bits (ENOB) is defined by (SINAD – 1.76)/6.02. (5) A 50kΩ pull-down resistor is inserted internally. (6) Includes internal
reference. (7) Excludes internal reference.
PIN CONFIGURATION
Top View
SSOP
PIN DESCRIPTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
DESIGNATOR
GND
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
Bit 9
Bit 10
OE
DESCRIPTION
Ground
Data Bit 1 (D9) (MSB)
Data Bit 2 (D8)
Data Bit 3 (D7)
Data Bit 4 (D6)
Data Bit 5 (D5)
Data Bit 6 (D4)
Data Bit 7 (D3)
Data Bit 8 (D2)
Data Bit 9 (D1)
Data Bit 10 (D0) (LSB)
Output Enable. HI = high impedance state.
LO = normal operation (internal pull-
down resistor)
Power Down. HI = power down; LO = normal
Convert Clock Input
+5V Supply
Ground
Input Range Select. HI = 2Vp-p; LO = 1Vp-p
Reference Select. HI = external; LO = internal
Bottom Reference
Bottom Ladder Bypass
Top Ladder Bypass
Top Reference
Common-Mode Voltage Output
Complementary Input (–)
Analog Input (+)
Ground
+5V Supply
Output Logic Driver Supply Voltage
GND
Bit 1 (MSB)
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bit 8
1
2
3
4
5
6
7
ADS824
8
9
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VDRV
+V
S
GND
IN
IN
CM
REFT
ByT
ByB
REFB
INT/EXT
RSEL
GND
+V
S
Bit 9 10
Bit 10 (LSB) 11
OE 12
PD 13
CLK 14
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PD
CLK
+V
S
GND
RSEL
INT/EXT
REFB
ByB
ByT
REFT
CM
IN
IN
GND
+V
S
VDRV
®
3
ADS824
TIMING DIAGRAM
N+1
Analog In
N
t
D
Clock
5 Clock Cycles
t
2
Data Out
N–5
N–4
N–3
N–2
N–1
N
t
1
N+1
N+2
t
CONV
N+2
N+3
N+4
N+5
t
L
t
H
N+6
N+7
Data Invalid
SYMBOL
t
CONV
t
L
t
H
t
D
t
1
t
2
DESCRIPTION
Convert Clock Period
Clock Pulse Low
Clock Pulse High
Aperture Delay
Data Hold Time, C
L
= 0pF
New Data Delay Time, C
L
= 15pF max
MIN
13.4
6.4
6.4
3.9
TYP
MAX
100µs
UNITS
ns
ns
ns
ns
ns
ns
6.7
6.7
3
12
PACKAGE/ORDERING INFORMATION
PACKAGE
DRAWING
NUMBER
(1)
324
"
SPECIFIED
TEMPERATURE
RANGE
–40°C to +85°C
"
PACKAGE
MARKING
ADS824E
"
ORDERING
NUMBER
(2)
ADS824E
ADS824E/1K
TRANSPORT
MEDIA
Rails
Tape and Reel
PRODUCT
ADS824E
"
PACKAGE
SSOP-28
"
NOTES: (1) For detailed drawing and dimension table, please see end of data sheet, or Appendix C of Burr-Brown IC Data Book. (2) Models with a slash (/) are
available only in Tape and Reel in the quantities indicated (e.g., /1K indicates 1000 devices per reel). Ordering 1000 pieces of ADS824E/iK” will get a single 1000-
piece Tape and Reel. For detailed Tape and Reel mechanical information, refer to Appendix B of Burr-Brown IC Data Book.
DEMO BOARD ORDERING INFORMATION
PRODUCT
ADS824E
DEMO BOARD
DEM-ADS824E
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
Analog Input ............................................................. –0.3V to (+V
S
+ 0.3V)
Logic Input ............................................................... –0.3V to (+V
S
+ 0.3V)
Case Temperature ......................................................................... +100°C
Junction Temperature .................................................................... +150°C
Storage Temperature ..................................................................... +150°C
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.
®
ADS824
4
TYPICAL PERFORMANCE CURVES
At T
A
= full specified temperature range, V
S
= +5V, single-ended input range = 1.5V to 3.5V, and sampling rate = 70MHz, external reference, unless otherwise noted.
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Industrial Control Electronics
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