AD7621 Analog Devices, AD7621 Datasheet - Page 4

• Manufacturer Part Number: AD7621
• Description: 16-Bit, 2 LSB INL, 3 MSPS PulSAR® ADC
• Manufacturer: Analog Devices

Specifications of AD7621

• Resolution (bits): 16bit
• # Chan: 1
• Sample Rate: 3MSPS
• Interface: Byte,Par,Ser,SPI
• Analog Input Type: Diff-Uni
• Ain Range: (2Vref) p-p
• Adc Architecture: SAR
• Pkg Type: CSP,QFP

AD7621
Parameter
EXTERNAL REFERENCE
REFERENCE BUFFER
TEMPERATURE PIN
DIGITAL INPUTS
DIGITAL OUTPUTS
POWER SUPPLIES
TEMPERATURE RANGE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
When using an external reference. With the internal reference, the input range is −0.1 V to V
See the Analog Inputs section.
Linearity is tested using endpoints, not best fit. Tested with an external reference at 2.048 V.
LSB means least significant bit. With the ±2.048 V input range, 1 LSB is 62.5 μV.
See the Voltage Reference Input section. These specifications do not include the error contribution from the external reference.
All specifications in dB are referred to a full-scale input FSR. Tested with an input signal at 0.5 dB below full-scale, unless otherwise specified.
Parallel or serial 16-bit.
Conversion results are available immediately after completed conversion.
See the Absolute Maximum Ratings section.
In warp mode. Tested in parallel reading mode.
With internal reference, PDREF and PDBUF are low; without internal reference, PDREF and PDBUF are high.
In impulse mode. Tested in parallel reading mode.
With all digital inputs forced to OVDD.
Consult factory for extended temperature range.
Logic Levels
Data Format
Pipeline Delay
Specified Performance
Operating Current
Power Dissipation
In Power-Down Mode
Specified Performance
Turn-On Settling Time
REFBUFIN Output Voltage
REFBUFIN Output Resistance
Voltage Range
Current Drain
REFBUFIN Input Voltage Range
Voltage Output
Temperature Sensitivity
Output Resistance
With Internal Reference
Without Internal Reference
With Internal Reference
Without Internal Reference
V
V
I
I
V
V
AVDD
DVDD
OVDD
AVDD
DVDD
OVDD
IL
IH
IL
IH
OL
OH
11
7
8
11
10
14
13
10
12
10
12
Conditions
C
REFBUFIN @ 25°C
PDREF = PDBUF = high
REF
3 MSPS throughput
PDREF = high, PDBUF = low
@ 25°C
I
I
3 MSPS throughput
With internal reference
3 MSPS throughput
3 MSPS throughput
1.25 MSPS throughput
1.25 MSPS throughput
PD = high
T
SINK
SOURCE
MIN
REF
= 500 μA
= 10 μF
to T
= –500 μA
MAX
Rev. 0 | Page 4 of 32
REF
.
Min
1.8
1.05
–0.3
1.7
–1
–1
OVDD − 0.3
2.37
2.37
2.30
–40
9
Typ
5
1.2
6.33
2.048
250
1.2
273
0.85
4.7
2.5
2.5
25.2
3.6
1
70
65
42
37
600
Max
AVDD
1.30
+0.6
5.25
+1
+1
0.4
2.63
2.63
3.6
86
80
55
50
+85
Unit
ms
V
kΩ
V
μA
V
mV
mV/°C
kΩ
V
V
μA
μA
V
V
V
V
V
mA
mA
mA
mW
mW
mW
mW
μW
°C