AD7945BR Analog Devices Inc, AD7945BR Datasheet - Page 5

• Manufacturer Part Number: AD7945BR
• Description: DAC 1-CH R-2R 12-Bit 20-Pin SOIC W
• Manufacturer: Analog Devices Inc

Specifications of AD7945BR

• Package: 20SOIC W
• Resolution: 12 Bit
• Conversion Rate: 1.7 MSPS
• Architecture: R-2R
• Digital Interface Type: Parallel
• Number Of Outputs Per Chip: 1
• Output Type: Current
• Full Scale Error: ±2 LSB
• Integral Nonlinearity Error: ±0.5 LSB
• Maximum Settling Time: 0.6(Typ) us
• Rohs Status: RoHS non-compliant
• Settling Time: 600ns
• Number Of Bits: 12
• Data Interface: Parallel
• Number Of Converters: 1
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 25µW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Number Of Channels: 1
• Interface Type: Parallel
• Single Supply Voltage (typ): 5V
• Dual Supply Voltage (typ): Not RequiredV
• Power Supply Requirement: Single
• Single Supply Voltage (min): 4.5V
• Single Supply Voltage (max): 5.5V
• Dual Supply Voltage (min): Not RequiredV
• Dual Supply Voltage (max): Not RequiredV
• 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: Not Compliant

REV. B
AD7943 TIMING SPECIFICATIONS
Parameter
t
t
t
t
t
t
t
t
NOTES
1
2
3
Specifications subject to change without notice.
STB
DS
DH
SRI
LD
CLR
ASB
SV
All input signals are specified with tr = tf = 5 ns (10% to 90% of 5 V) and timed from a voltage level of 1.6 V. tr and tf should not exceed 1 s on any digital input.
STB mark/space ratio range is 60/40 to 40/60.
t
SV
3
is measured with the load circuit of Figure 2 and defined as the time required for the output to cross 0.8 V or 2.4 V.
2
STB1,
STB2,
STB4
STB3
LD1,
LD2,
CLR
SRO
SRI
t
DB11(N)
DS
(MSB)
t
SRI
Limit @
V
60
15
35
55
55
55
0
60
t
DH
DD
t
STB
= +3 V to +3.6 V
DB10(N–1)
DB10(N)
t
SV
Figure 2. Load Circuit for Digital Output Timing Specifications
Limit @
V
40
10
25
35
35
35
0
35
DD
TO OUTPUT
Figure 1. AD7943 Timing Diagram
= +4.5 V to +5.5 V
1
PIN
(T
A
= T
50pF
MIN
C
L
to T
1.6mA
200 A
–5–
MAX
, unless otherwise noted)
I
I
OL
OH
Units
ns min
ns min
ns min
ns min
ns min
ns min
ns min
ns max
+2.1V
Description
Min Time Between Strobing Input Shift
Register and Loading DAC Register
STB Pulsewidth
Data Setup Time
Data Hold Time
SRI Data Pulsewidth
Load Pulsewidth
CLR Pulsewidth
STB Clocking Edge to SRO Data Valid Delay
AD7943/AD7945/AD7948
DB0(N)
DB0(N–1)
t
ASB
t
LD ,
t
CLR