AD9761 Analog Devices, AD9761 Datasheet - Page 4

• Manufacturer Part Number: AD9761
• Description: 10-Bit, Complete, 40 MSPS, dual Transmit D/A Converter
• Manufacturer: Analog Devices

Specifications of AD9761

• Resolution (bits): 10bit
• Dac Update Rate: 40MSPS
• Dac Settling Time: 35ns
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Par

DIGITAL FILTER SPECIFICATIONS
Parameter
MAXIMUM INPUT CLOCK RATE (f
DIGITAL FILTER CHARACTERISTICS
NOTES
1
2
3
Specifications subject to change without notice.
AD9761
Excludes SINx/x characteristic of DAC.
Defined as the number of data clock cycles between impulse input and peak of output response.
55 input clock periods from input to I DAC, 56 to Q DAC. Propagation delay is delay from data input to DAC update.
Pass Bandwidth
Pass Bandwidth: 0.01 dB
Pass Bandwidth: 0.1 dB
Pass Bandwidth: –3 dB
Linear Phase (FIR Implementation)
Stop-Band Rejection: 0.3 f
Group Delay
Impulse Response Duration
–40 dB
–60 dB
–100
–120
–20
–40
–60
–80
–0.1
–0.2
–0.3
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Figure 2a. FIR Filter Frequency Response
0
1
0
0
Figure 2b. FIR Filter Impulse Response
0
2
5
1
FREQUENCY RESPONSE (DC to f
: 0.005 dB
0.1
10
15
0.2
CLOCK
TIME (Samples)
3
20
to 0.7 f
0.3
25
CLOCK
CLOCK
30
CLOCK
)
0.4
35
/2)
40
(T
otherwise noted.)
0.5
MIN
to T
Min
40
MAX
, AVDD = 2.7 V to 5.5 V, DVDD = 2.7 V to 5.5 V, I
–4–
Lower Coefficient
H(1)
H(2)
H(3)
H(4)
H(5)
H(6)
H(7)
H(8)
H(9)
H(10)
H(11)
H(12)
H(13)
H(14)
H(15)
H(16)
H(17)
H(18)
H(19)
H(20)
H(21)
H(22)
Table I. Integer Filter Coefficients for 43-Tap Half-Band
FIR Filter
Typ
0.2010
0.2025
0.2105
0.239
–62.5
32
28
40
Upper Coefficient
H(43)
H(42)
H(41)
H(40)
H(39)
H(38)
H(37)
H(36)
H(35)
H(34)
H(33)
H(32)
H(31)
H(30)
H(29)
H(28)
H(27)
H(26)
H(25)
H(24)
H(23)
Max
OUTFS
= 10 mA, unless
Unit
MSPS
f
f
f
f
dB
Input Clock Cycles
Input Clock Cycles
Input Clock Cycles
OUT
OUT
OUT
OUT
/f
/f
/f
/f
CLOCK
CLOCK
CLOCK
CLOCK
Integer Value
1
0
–3
0
8
0
–16
0
29
0
–50
0
81
0
–131
0
216
0
–400
0
1264
1998
REV. C