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Burr-Brown Corporation

ADS931 Datasheet Preview

ADS931 Datasheet

8-Bit/ 30MHz Sampling ANALOG-TO-DIGITAL CONVERTER

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®
ADS931E
ADS931
TM 8-Bit, 30MHz Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q +2.7V TO +5.5V SUPPLY OPERATION
q LOW POWER: 69mW at +3V
q ADJUSTABLE FULL SCALE RANGE WITH
EXTERNAL REFERENCE
q NO MISSING CODES
q POWER DOWN
q 28-LEAD SSOP PACKAGE
APPLICATIONS
q BATTERY POWERED EQUIPMENT
q CAMCORDERS
q PORTABLE TEST EQUIPMENT
q DIGITAL CAMERAS
q COMMUNICATIONS
DESCRIPTION
The ADS931 is a high speed pipelined analog-to-
digital converter that is specified to operate from
standard +5V or +3V power supplies. This converter
includes a high bandwidth track/hold and an 8-bit
quantizer. The performance is specified with a single-
ended input range of 1V to 2V when operating off of
a +3V supply. This device also allows for standard
input ranges such as 2V to 4V or 2V to 3V, when
operating on +5V supplies. The full scale input range
is set by an external reference.
The ADS931 employs digital error correction tech-
niques to provide excellent differential linearity for
demanding imaging applications. Its low distortion and
high SNR give the extra margin needed for telecom-
munications, video and test instrumentation applica-
tions. This high performance A/D converter is speci-
fied for performance at a 30MHz sampling rate. The
ADS931 is available in a 28-Lead SSOP package.
ADS931
CLK
Timing
Circuitry
LVDD
IN T/H
Pipeline
A/D
Error
Correction
Logic
3-State
Outputs
8-Bit
Digital
Data
Reference
Ladder
REFT CM REFB
Pwrdn 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 • 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-11349C
ADS931Printed in U.S.A. March, 1998
®




Burr-Brown Corporation

ADS931 Datasheet Preview

ADS931 Datasheet

8-Bit/ 30MHz Sampling ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

SPECIFICATIONS
At TA = full specified temperature range unless otherwise noted. +VS = LVDD = +3V, specified single-ended input (1V to 2V) and sampling rate = 30MHz, unless
otherwise specified. The input range is 2.25V to 3.25V when specified for +5V operation.
PARAMETER
RESOLUTION
SPECIFIED TEMPERATURE RANGE
ANALOG INPUT
Specified Full Scale Input Range(1)
Common-mode Voltage
Analog Input Bias Current
Input Impedance
DIGITAL INPUTS
Logic Family
High Input Voltage, VIH
Low Input Voltage, VIL
High Input Current, IIH
Low Input Current, IIL
Input Capacitance
CONVERSION CHARACTERISTICS
Start Conversion
Sample Rate
Data Latency
DYNAMIC CHARACTERISTICS
Differential Linearity Error
f = 500MHz
f = 12.5MHz
No Missing Codes
Integral Nonlinearity Error, f = 500kHz
Spurious Free Dynamic Range(2)
f = 500kHz (–1dBFS input)
f = 12.5MHz (–1dBFS input)
Two-Tone Intermodulation Distortion(4)
f = 3.6MHz and 3.5MHz (–7dBFS each tone)
Signal-to-Noise Ratio (SNR)
f = 500kHz (–1dBFS input)
f = 12.5MHz (–1dBFS input)
Signal-to-(Noise + Distortion) (SINAD)
f = 500kHz (–1dBFS input)
f = 12.5MHz (–1dBFS input)
Effective Number of Bits
Differential Gain Error
Differential Phase Error
Output Noise
Aperture Delay Time
Aperture Jitter
Analog Input Bandwidth
Small Signal
Full Power
Overvoltage Recovery Time(6)
DIGITAL OUTPUTS
Logic Family
Logic Coding
High Output Voltage, VOH
Low Output Voltage, VOL
3-State Enable Time
3-State Disable Time
Internal Pull-Down
Power-Down Enable Time
Power-Down Disable Time
Internal Pull-Down
ACCURACY
Gain Error
Input Offset(7)
Power Supply Rejection (Gain)
External REFT Voltage Range
External REFB Voltage Range
Reference Input Resistance
CONDITIONS
Ambient Air
1Vp-p
VS = +3V and +5V
VS = +3V and +5V
VS = +3V and +5V
VS = +3V and +5V
VS = +3V and +5V
VS = +3V and +5V
f = 12MHz(5)
NTSC, PAL
NTSC, PAL
Input AC-Grounded
–20dBFS Input
0dBFS Input
CL = 15pF
OE = L
OE = H
Pwrdn = L
Pwrdn = H
VS = +3V and +5V
Referred to Ideal Midscale
VS = +10%
ADS931E
MIN TYP MAX
8
–40 to +85
+1.0
+2.0
+1.5
1
1.25 || 5
+2.0
TTL/HCT Compatible CMOS
±10
±10
5
LVDD
+0.8
Rising Edge of Convert Clock
10k 30M
5
UNITS
Bits
°C
V
V
µA
M|| pF
V
V
µA
µA
pF
Samples/s
Clk Cycles
±0.7
±0.7
Guaranteed
±1.0
±1.0
±2.5
49
43 49
54
48
44 48
45
40 45
7.2
2.3
1
0.2
2
7
350
100
2
TTL/HCT Compatible CMOS
Straight Offset Binary
2.4 VDD
0.4
20 40
2 10
50
133
18
50
2.4 3.5
±6.5 ±25
42 75
REFB +0.5
2
VS–0.8
0.8 1 REFT –0.5
4
LSB
LSB
LSB
dBFS(3)
dBFS
dBFS
dB
dB
dB
dB
Bits
%
degrees
LSBs rms
ns
ps rms
MHz
MHz
ns
V
V
ns
ns
k
ns
ns
k
%FS
mV
dB
V
V
k
®
ADS931
2


Part Number ADS931
Description 8-Bit/ 30MHz Sampling ANALOG-TO-DIGITAL CONVERTER
Maker Burr-Brown Corporation
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ADS931 Datasheet PDF






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