AD7994 Analog Devices, AD7994 Datasheet - Page 7

• Manufacturer Part Number: AD7994
• Description: 4 Channel, 12-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP
• Manufacturer: Analog Devices

Specifications of AD7994

• Resolution (bits): 12bit
• # Chan: 4
• Sample Rate: 188kSPS
• Interface: I²C/Ser 2-Wire,Ser
• Analog Input Type: SE-Uni
• Ain Range: Uni (Vref)
• Adc Architecture: SAR
• Pkg Type: SOP

I
Guaranteed by initial characterization. All values measured with input filtering enabled. C
tr and tf measured between 0.3 V
High speed mode timing specifications apply to the AD7993-1/AD7994-1 only. Standard and fast mode timing specifications apply to
both the AD7993-0/AD7994-0 and the AD7993-1/AD7994-1. See Figure 2.
Unless otherwise noted, V
Table 3.
Parameter
f
t
t
t
t
t
t
t
t
t
SCL
1
2
3
4
5
6
7
8
9
2
1
C TIMING SPECIFICATIONS
Conditions
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
Standard mode
Fast mode
High speed mode
Standard mode
Fast mode
High speed mode
C
C
C
C
C
C
C
C
C
C
B
B
B
B
B
B
B
B
B
B
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
= 100 pF max
= 400 pF max
DD
= 2.7 V to 5.5 V; REF
DD
and 0.7 V
DD
.
Min
4
0.6
60
120
4.7
1.3
160
320
250
100
10
0
0
0
0
4.7
0.6
160
4
0.6
160
4.7
1.3
4
0.6
160
20 + 0.1 C
10
20
IN
= 2.5 V; T
B
Limit at T
AD7993/AD7994
Rev. 0 | Page 7 of 32
Max
100
400
3.4
1.7
3.45
0.9
70
150
1000
300
80
160
A
=T
2
MIN
MIN
to T
, T
MAX
MAX
Unit
kHz
kHz
MHz
MHz
µs
µs
ns
ns
µs
µs
ns
ns
ns
ns
ns
µs
µs
ns
ns
µs
µs
ns
µs
µs
ns
µs
µs
µs
µs
ns
ns
ns
ns
ns
.
Description
Serial clock frequency
t
t
t
t
t
t
t
condition
t
t
B
HIGH
LOW
SU;DAT
HD;DAT
SU;STA
HD;STA
BUF
SU;STO
RDA
refers to capacitive load on the bus line.
, bus free time between a stop and a start
, rise time of SDA signal
, SCL low time
, SCL high time
, setup time for a repeated start condition
, setup time for stop condition
, data setup time
, hold time (repeated) start condition
, data hold time
AD7993/AD7994