AD7226KRZ Analog Devices Inc, AD7226KRZ Datasheet - Page 4

• Manufacturer Part Number: AD7226KRZ
• Description: IC DAC 8BIT LC2MOS QUAD 20-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD7226KRZ

• Data Interface: Parallel
• Settling Time: 4µs
• Number Of Bits: 8
• Number Of Converters: 4
• Voltage Supply Source: Dual ±
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Resolution (bits): 8bit
• Sampling Rate: 143kSPS
• Input Channel Type: Parallel
• Supply Current: 13mA
• Digital Ic Case Style: SOIC
• No. Of Pins: 20
• Number Of Channels: 4
• Resolution: 8b
• Conversion Rate: 143KSPS
• Interface Type: Parallel
• Single Supply Voltage (typ): 15V
• Dual Supply Voltage (typ): -5/12/-5/15V
• Architecture: R-2R
• Power Supply Requirement: Single/Dual
• Output Type: Voltage
• Integral Nonlinearity Error: ±0.5LSB
• Single Supply Voltage (min): 14.25V
• Single Supply Voltage (max): 15.75V
• Dual Supply Voltage (min): -4.5/11.4V
• Dual Supply Voltage (max): -5.5/16.5V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 20
• Package Type: SOIC W
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power Dissipation (max): -
• Lead Free Status / Rohs Status: Compliant

AD7226
TERMINOLOGY
TOTAL UNADJUSTED ERROR
This is a comprehensive specification that includes full-scale
error, relative accuracy and zero code error. Maximum output
voltage is V
256. The LSB size will vary over the V
code error will, relative to the LSB size, increase as V
Accordingly, the total unadjusted error, which includes the zero
code error, will also vary in terms of LSB’s over the V
As a result, total unadjusted error is specified for a fixed refer-
ence voltage of 10 V.
RELATIVE ACCURACY
Relative Accuracy or endpoint nonlinearity, is a measure of the
maximum deviation from a straight line passing through the
endpoints of the DAC transfer function. It is measured after
allowing for zero and full-scale error and is normally expressed
in LSB’s or as a percentage of full-scale reading.
REF
– 1 LSB (ideal), where 1 LSB (ideal) is V
REF
range. Hence the zero
DB7 (MSB)
DB7 (MSB)
AGND
DGND
REF
V
DB8
REF
PIN CONFIGURATIONS
V
V
REF
AGND
DGND
decreases.
OUT
OUT
V
DB6
DB5
DB4
DIP and SOIC/SSOP
V
REF
4
5
6
7
8
SS
REF
B
A
range.
10
1
2
3
4
5
6
7
8
9
/
9
3
(Not to Scale)
(Not to Scale)
TOP VIEW
TOP VIEW
10
AD7226
PLCC
2
AD7226
–4–
11
1
12
DIFFERENTIAL NONLINEARITY
Differential Nonlinearity is the difference between the measured
change and the ideal 1 LSB change between any two adjacent
codes. A specified differential nonlinearity of ± 1 LSB max over
the operating temperature range ensures monotonicity.
DIGITAL CROSSTALK
The glitch impulse transferred to the output of one converter
due to a change in the digital input code to another of the con-
verters. It is specified in nV secs and is measured at V
FULL SCALE ERROR
Full-Scale Error is defined as:
20
Measured Value – Zero Code Error – Ideal Value
20
19
18
17
16
15
14
13
12
11
19
13
V
V
V
A0
A1
WR
DB0(LSB)
DB1
DB2
DB3
OUT
OUT
DD
18
17
16
15
14
C
D
A0
A1
WR
DB0(LSB)
V
DD
REF
REV.
= 0 V.
D