EVAL-AD7725CBZ Analog Devices Inc, EVAL-AD7725CBZ Datasheet - Page 14

• Manufacturer Part Number: EVAL-AD7725CBZ
• Description: BOARD EVALUATION FOR AD7725
• Manufacturer: Analog Devices Inc

Specifications of EVAL-AD7725CBZ

• Number Of Adc's: 1
• Number Of Bits: 16
• Sampling Rate (per Second): 900k
• Data Interface: Serial, Parallel
• Inputs Per Adc: 1 Differential
• Input Range: ±VREF
• Power (typ) @ Conditions: 615mW @ 900kSPS
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD7725
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7725–Typical Performance Characteristics
PERFORMANCE PLOTS
The following typical plots are generated using the digital filter shown in Figure 1.
(AV
TPC 2. SNR, THD, and SFDR vs. Sampling Frequency
DD
= DV
TPC 3. SNR, THD, and SFDR vs. Temperature
110
105
100
TPC 1. SNR, THD, and SFDR vs. Analog Input
Level Relative to Full Scale
110
100
120
110
100
95
90
85
80
75
70
90
80
70
60
50
40
30
90
80
70
60
–50
–50
0
INPUT FREQUENCY = 10kHz
DD
INPUT FREQUENCY = 10kHz
, T
INPUT FREQUENCY = 10kHz
–25
A
2.4
= 25 C, CLKIN = 9.6 MHz, External Reference = 2.5 V, unless otherwise noted.)
–40
ANALOG INPUT LEVEL – dB
SFDR
CLKIN FREQUENCY – MHz
4.8
0
TEMPERATURE – C
SFDR
–30
25
7.2
THD
SNR
SFDR
THD
THD
–20
50
9.6
SNR
SNR
–10
75
12
100
14.4
0
–14–
TPC 6. 16k Point FFT for a 108 Tap Low-Pass FIR
Filter Operating with a CLKIN Frequency of 14.4 MHz
TPC 4. Histogram of Output Codes for a DC Input
–100
–120
–140
–160
5000
4000
3000
2000
1000
–100
–120
–140
–160
–20
–40
–60
–80
–20
–40
–60
–80
32717
0
0
0
0
0
8192 SAMPLES TAKEN
V
MAXIMUM OUTPUT DATA RATE
IN
32718
(+) = V
50
50
32719 32720
IN
100
TPC 5. 16k Point FFT
(–)
100
150
FREQUENCY – kHz
FREQUENCY – kHz
32721 32722
200
CODE
150
250
SNR = 84dB
THD = –93.85dB
SFDR = –98.47dB
AIN = 10kHz
MEASURED BW = 300kHz
SNR = 80.48dB
THD = –90.62dB
SFDR = –98dB
AIN = 10kHz
MEASURED BW = 450kHz
32723
200
300
32724
350
250
32725
400
32726
450
REV. A
300