AD7151BRMZ Analog Devices Inc, AD7151BRMZ Datasheet - Page 4

• Manufacturer Part Number: AD7151BRMZ
• Description: IC CAP CONV 1CH ULT LP 10MSOP
• Manufacturer: Analog Devices Inc
• Type: Capacitance-to-Digital Converterr

Specifications of AD7151BRMZ

• Input Type: Voltage
• Output Type: Digital
• Interface: 2-Wire Serial
• Current - Supply: 120µA
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Resolution (bits): 12bit
• Sampling Rate: 100SPS
• Input Channel Type: Single Ended
• Data Interface: 2-Wire, I2C, Serial
• Supply Voltage Range - Analog: 2.7V To 3.6V
• Supply Current: 70µA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7151
Parameter
POWER REQUIREMENTS
1
2
3
4
TIMING SPECIFICATIONS
V
Table 2.
Parameter
CONVERTER
SERIAL INTERFACE
1
2
3
4
5
6
Capacitance units: one picofarad (1 pF) = 1 × 10
The CAPDAC can be used to shift (offset) the input range. The total capacitance of the sensor can, therefore, be up to the sum of the CAPDAC value and the conversion
input range. With the autoCAPDAC feature, the CAPDAC is adjusted automatically when the CDC input value is lower than 25% or higher than 75% of the CDC
nominal input range.
Specification is not production tested but is supported by characterization data at initial product release.
Digital inputs equal to V
Specification is not production tested but is supported by characterization data at initial product release.
Wake-up time is the maximum delay between the last SCL edge writing the configuration register and the start of conversion.
Power-up time is the maximum delay between the V
command.
Reset time is the maximum delay between the last SCL edge writing the reset command and either the start of conversion or when ready to receive a serial interface
command.
Sample tested during initial release to ensure compliance.
All input signals are specified with input rise/fall times = 3 ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and outputs.
Output load = 10 pF.
DD
V
I
I
Conversion Time
Wake-Up Time from Power-Down Mode
Power-Up Time
Reset Time
SCL Frequency
SCL High Pulse Width, t
SCL Low Pulse Width, t
SCL, SDA Rise Time, t
SCL, SDA Fall Time, t
Hold Time (Start Condition), t
Setup Time (Start Condition), t
Data Setup Time, t
Setup Time (Stop Condition), t
Data Hold Time (Master), t
Bus-Free Time (Between Stop and Start Condition), t
DD
DD
DD
= 2.7 V to 3.6 V; GND = 0 V; Input Logic 0 = 0 V; Input Logic 1 = V
Current
Current Power-Down Mode
-to-GND Voltage
SDA
SCL
4
1, 4
1, 3
5, 6
P
t
BUF
SU;DAT
DD
F
or GND.
R
S
LOW
HIGH
t
HD;STA
HD;DAT
HD;STA
SU;STO
t
SU;STA
4
LOW
t
R
−12
t
HD;DAT
Min
2.7
1, 2
farad (F); one femtofarad (1 fF) = 10
DD
crossing the minimum level (2.7 V) and either the start of conversion or when ready to receive a serial interface
Figure 2. Serial Interface Timing Diagram
BUF
t
HIGH
Typ
70
1
3
t
F
t
SU;DAT
Rev. 0 | Page 4 of 28
Min
0
0.6
1.3
0.6
0.6
0.1
0.6
10
1.3
Typ
0.3
2
2
Max
3.6
80
5
10
−15
DD
farad (F).
; –40°C to +85°C, unless otherwise noted.
Max
10
400
0.3
0.3
S
t
Unit
V
μA
μA
μA
SU;STA
Unit
ms
ms
ms
ms
kHz
μs
μs
μs
μs
μs
μs
μs
μs
ns
μs
t
HD;STA
1
Test Conditions/Comments
See Figure 2.
After this period, the first clock is generated.
Relevant for repeated start condition.
Test Conditions/Comments
V
Temperature ≤ 25°C
Temperature = 85°C
DD
= 3.3 V, nominal
t
SU;STO
P