AD589UH AD [Analog Devices], AD589UH Datasheet - Page 4

• Manufacturer Part Number: AD589UH
• Description: LC2MOS 5 us 8-Bit ADC with Track/Hold
• Manufacturer: AD [Analog Devices]

Model
AD7575JR
AD7575JN
AD7575KN
AD7575JP
AD7575KP
AD7575AQ
AD7575BQ
AD7575SQ
AD7575TQ
AD7575SE
AD7575TE
NOTES
1
2
AD7575
To order MIL-STD-883, Class B process parts, add /883B to part number.
Contact local sales office for military data sheet. For U.S. Standard Military
Drawing (SMD), see DESC drawing #5962-87762.
E = Leadless Ceramic Chip Carrier; N = Plastic DIP; P = Plastic Leaded Chip
Carrier; Q = Cerdip, R = SOIC.
DB7 (MSB)
DGND
1
BUSY
CLK
DB6
DB5
RD
CS
TP
1
2
3
4
5
6
7
8
9
DIP/SOIC
(Not to Scale)
TOP VIEW
AD7575
0 C to +70 C
0 C to +70 C
0 C to +70 C
0 C to +70 C
0 C to +70 C
–25 C to +85 C
–25 C to +85 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
–55 C to +125 C
Temperature
Range
ORDERING GUIDE
18
17
16
15
14
13
12
11
10
V
V
AIN
AGND
DB0 (LSB)
DB1
DB2
DB3
DB4
DD
REF
Relative
Accuracy
(LSB)
1 max
1 max
1/2 max
1 max
1/2 max
1 max
1/2 max
1 max
1/2 max
1 max
1/2 max
NC = NO CONNECT
DB7 (MSB)
BUSY
PIN CONFIGURATIONS
CLK
DB6
DB5
Package
Options
R-18
N-18
N-18
P-20A
P-20A
Q-18
Q-18
Q-18
Q-18
E-20A
E-20A
4
5
6
7
8
9
3
(Not to Scale)
2
TOP VIEW
LCCC
AD7575
10 11 12 13
–4–
2
1
20 19
TERMINOLOGY
LEAST SIGNIFICANT BIT (LSB)
An ADC with 8-bits resolution can resolve 1 part in 2
256) of full scale. For the AD7575 with +2.46 V full-scale one
LSB is 9.61 mV.
TOTAL UNADJUSTED ERROR
This is a comprehensive specification that includes full-scale
error, relative accuracy and offset error.
RELATIVE ACCURACY
Relative Accuracy is the deviation of the ADC’s actual code
transition points from a straight line drawn between the devices
measured first LSB transition point and the measured full-scale
transition point.
SNR
Signal-to-Noise Ratio (SNR) is the ratio of the desired signal to
the noise produced in the sampled and digitized analog signal.
SNR is dependent on the number of quantization levels used in
the digitization process; the more levels, the smaller the quantiza-
tion noise. The theoretical SNR for a sine wave input is given by
where N is the number of bits in the ADC.
FULL-SCALE ERROR (GAIN ERROR)
The gain of a unipolar ADC is defined as the difference between
the analog input levels required to produce the first and the last
digital output code transitions. Gain error is a measure of the
deviation of the actual span from the ideal span of FS – 2 LSBs.
ANALOG INPUT RANGE
With V
is 0 V to +2.46 V. The output data in LSBs is related to the
analog input voltage by the integer value of the following
expression:
SLEW RATE
Slew Rate is the maximum allowable rate of change of input
signal such that the digital sample values are not in error. Slew
Rate limitations may restrict the analog signal bandwidth for
full-scale analog signals below the bandwidth allowed from
sampling theorem considerations.
REF
18
17
16
15
14
AIN
AGND
DB0 (LSB)
DB1
DB2
= +1.23 V, the maximum analog input voltage range
Data (LSBs) =
SNR = (6.02 N + 1.76) dB
NC = NO CONNECT
DB7 (MSB)
256 AIN
BUSY
2 V
CLK
DB6
TP
REF
4
5
6
7
8
+ 0.5
3
9
(Not to Scale)
10
TOP VIEW
2
AD7575
PLCC
11
1
PIN 1
IDENTIFIER
20
12
19
13
18
17
16
15
14
8
(i.e.,
AIN
AGND
DB0 (LSB)
DB1
DB2
REV. B