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AD7740KRMZ Datasheet(PDF) 6 Page - Analog Devices

Part No. AD7740KRMZ
Description  3 V/5 V Low Power, Synchronous Voltage-to-Frequency Converter
Download  11 Pages
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7740KRMZ Datasheet(HTML) 6 Page - Analog Devices

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–6–
–0.015
–0.005
0
0.005
0.01
–0.01
–0.5
0
0.5
1.5
1
2
2.5
VIN – V
VDD = 5V
REFIN = 2.5V
CLKIN = 1MHz
TA = 25 C
BUFFER OFF
BUFFER ON
0.015
TPC 1. INL vs. VIN (Buffered and
Unbuffered)
VDD – V
12
8
–8
03
6
45
4
–4
0
REFIN = 2.5V
CLKIN = 1MHz
TA = 25 C
BUF = 0
GAIN ERROR
GAIN ERROR
OFFSET ERROR
0.08
0.04
–0.12
0
–0.08
–0.04
TPC 4. Offset and Gain Error vs. VDD
VDD – V
2.520
2.500
2.5
3.0
5.5
3.5
2.515
2.510
TA = 25 C
2.505
4.0
4.5
5.0
TPC 7. REFOUT vs. VDD
CLKIN FREQUENCY – kHz
–4
–5
–8
0
200
1000
400
–6
–7
600
800
VDD = 5V
REFIN = 2.5V
TA = 25 C
BUFFER ON
BUFFER OFF
TPC 2. Offset Error vs. CLKIN
(Buffered and Unbuffered)
VIN – V
–80
–1
0
5
1
23
4
–60
–50
–70
VDD = 5V
REFIN = 4.75V
CLKIN = 1MHz
TA = 25 C
BUFFER ON
BUFFER OFF
TPC 5. PSRR vs. VIN (Buffered and
Unbuffered)
2.00V CH2 2.00V M 2.00 s
FOUT
CLKIN
2
VDD = 5V
REFIN = 5V
TA = 25 C
CLKIN
1 MHz
1
CH1
TPC 8. Typical FOUT Pulse Train
(VIN = VREF/4)
CLKIN FREQUENCY – kHz
–0.1
0
–0.05
0.05
0.1
0
200
800
600
400
1000
BUFFER
OFF
BUFFER ON
VDD = 5V
REFIN = 2.5V
TA = 25 C
TPC 3. Gain Error vs. CLKIN
(Buffered and Unbuffered)
CLKIN FREQUENCY – kHz
0
0
200
0.25
400
600
800
1000
0.5
0.75
1
1.25
BUFFER OFF
BUFFER ON
VDD = 5V
REFIN = 5V
TA = 25 C
CFOUT = 43pF
CCLKOUT = 22pF
TPC 6. IDD vs. CLKIN (Buffered and
Unbuffered)
AD7740–Typical Performance Characteristics
REV. A


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