Datasheet
ADC122S706
SNAS408A –NOVEMBER 2007–REVISED MARCH 2013
www.ti.com
ADC122S706 Converter Electrical Characteristics
(1)
(continued)
The following specifications apply for V
A
= +4.5V to 5.5V, V
D
= +2.7V to V
A
, V
REF
= 2.5V, f
SCLK
= 8 to 16 MHz, DUAL = V
D
, f
IN
= 100 kHz, C
L
= 25 pF, unless otherwise noted. Boldface limits apply for T
A
= T
MIN
to T
MAX
; all other limits are at T
A
= 25°C.
Symbol Parameter Conditions Typical Limits Units
(2)
POWER SUPPLY CHARACTERISTICS
4.5 V (min)
V
A
Analog Supply Voltage
5.5 V (max)
2.7 V (min)
V
D
Digital Supply Voltage
V
A
V (max)
Analog Supply Current, Continuously f
SCLK
= 16 MHz, f
S
= 1 MSPS, f
IN
= 100 kHz,
3.3 4.2 mA (max)
Converting (Dual Data Output Mode) V
A
= 5V, DUAL = V
D
I
VA
Analog Supply Current, Continuously
(Conv)
f
SCLK
= 16 MHz, f
S
= 500 kSPS, f
IN
= 100 kHz,
Converting (Single Data Output 1.8 2.9 mA (max)
V
A
= 5V, DUAL = 0V
Mode)
f
SCLK
= 16 MHz, f
S
= 1 MSPS, f
IN
= 100 kHz,
1.7 2.0 mA (max)
V
D
= 5V, DUAL = 5V
Digital Supply Current, Continuously
Converting (Dual Data Output Mode)
f
SCLK
= 16 MHz, f
S
= 1 MSPS, f
IN
= 100 kHz,
1.0 1.3 mA (max)
V
D
= 3V, DUAL = 3V
I
VD
(Conv)
f
SCLK
= 16 MHz, f
S
= 500 kSPS, f
IN
= 100 kHz,
0.9 1.2 mA (max)
Digital Supply Current, Continuously
V
D
= 5V, DUAL = 0V
Converting (Single Data Output
f
SCLK
= 16 MHz, f
S
= 500 kSPS, f
IN
= 100 kHz,
Mode)
0.6 0.7 mA (max)
V
D
= 3V, DUAL = 0V
Reference Current, Continuously f
SCLK
= 16 MHz, f
S
= 1 MSPS, V
REF
= 2.5V,
90 105 µA (max)
Converting (Dual Data Output Mode) DUAL = V
D
I
VREF
Reference Current, Continuously
(Conv)
f
SCLK
= 16 MHz, f
S
= 500 kSPS, V
REF
= 2.5V,
Converting (Single Data Output 45 60 µA (max)
DUAL = 0V
Mode)
f
SCLK
= 16 MHz, V
A
= 5.0V 10 µA
Analog Supply Current, Power Down
I
VA
(PD)
Mode (CS high)
f
SCLK
= 0, V
A
= 5.0V
(4)
0.5 1 µA (max)
f
SCLK
= 16 MHz, V
D
= 5.0V 10 µA
Digital Supply Current, Power Down
I
VD
(PD)
Mode (CS high)
f
SCLK
= 0
(4)
0.1 0.2 µA (max)
f
SCLK
= 16 MHz 0.05 µA
I
VREF
Reference Current, Power Down
(PD) Mode (CS high)
f
SCLK
= 0
(4)
0.05 0.1 µA (max)
f
SCLK
= 16 MHz, f
S
= 1 MSPS, f
IN
= 100 kHz,
25 31.3 mW (max)
V
A
= V
D
= 5V, V
REF
= 2.5V, DUAL = V
D
Power Consumption, Continuously
Converting (Dual Data Output Mode)
f
SCLK
= 16 MHz, f
S
= 1 MSPS, f
IN
= 100 kHz,
20 25.2 mW (max)
V
A
= 5V, V
D
= 3V, V
REF
= 2.5V, DUAL = V
D
PWR
(Conv)
f
SCLK
= 16 MHz, f
S
= 500 kSPS, f
IN
= 100 kHz,
13.6 20.6 mW (max)
Power Consumption, Continuously
V
A
= V
D
= 5V, V
REF
= 2.5V, DUAL = 0V
Converting (Single Data Output
f
SCLK
= 16 MHz, f
S
= 500 kSPS, f
IN
= 100 kHz,
Mode)
10.9 16.8 mW (max)
V
A
= 5V, V
D
= 3V, V
REF
= 2.5V, DUAL = 0V
f
SCLK
= 16 MHz, V
A
= V
D
= 5.0V, V
REF
= 2.5V 100 µW
PWR Power Consumption, Power Down
(PD) Mode (CS high)
f
SCLK
= 0, V
A
= V
D
= 5.0V, V
REF
= 2.5V 3.1 6.5 µW (max)
PSRR Power Supply Rejection Ratio See the Specification Definitions −85 dB
AC ELECTRICAL CHARACTERISTICS
f
SCLK
Maximum Clock Frequency 20 16 MHz (min)
f
SCLK
Minimum Clock Frequency 0.8 8 MHz (max)
f
S
Maximum Sample Rate
(5)
1.25 1 MSPS (min)
t
ACQ
Track/Hold Acquisition Time 3 SCLK cycles
t
CONV
Conversion Time 12 SCLK cycles
t
AD
Aperture Delay 6 ns
(4) Data sheet min/max specification limits are guaranteed by design, test, or statistical analysis.
(5) While the maximum sample rate is f
SCLK
/16, the actual sample rate may be lower than this by having the CS rate slower than f
SCLK
/16.
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