Features: True Differential Inputs
Guaranteed performance from 500 kSPS to 1 MSPS
External Reference
Wide Input Common-Mode Voltage Range
SPI™/QSPI™/MICROWIRE™/DSP compatible Serial InterfaceApplication Automotive Navigation
Portable Systems
Medical Instruments
Instrumentation and Control Systems
Motor Control
Direct Sensor InterfacePinout
Specifications
| Pin and Function Compatible Family |
1 ch, MSOP-8 |
| Resolution |
12 bits |
| Input Channels |
1 |
| Sample Rate Range (sps) |
500k to 1M |
| Interface Type |
SPI/QSPI/Microwire |
| Differential Input |
Yes |
| Power Down, typ. at 3.6V |
1.5 uW |
| Operating Power, typ at 3.6V, max ksps |
0.013 mW |
| Operating Power, 3.6V, 1ksps, max. PwrDn |
11.5 mW |
| PowerWise Rating 1 |
4.72 pJ/conv |
| INL (LSB) |
+/- 0.95 |
| DNL (LSB) |
+/- 0.95 |
| ENOB |
11.25 bits |
| SINAD |
69.5 dB |
| SNR |
71 dB |
| Max KSample Rate |
1000 ksps |
| Min Supply Voltage |
4.5 Volt |
| Max Supply Voltage |
5.5 Volt |
| Reference Source |
External |
| Temperature Min |
-40 deg C |
| Temperature Max |
105 deg C |
| Power Down |
Yes |
| Input Sample/Hold |
Yes |
| Special Features |
External Reference |
| Data Converter Type |
ADC |
| Max Sample Rate |
1 MSPS |
| Automotive Selection Guide |
Yes |
| View Using Catalog |
If Military/Aerospace specified devices are required,please contact the National Semiconductor Sales Office/Distributors for availability and specifications.
Analog Supply VoltageVA −0.3V to 6.5V
Voltage on Any Pin to GND −0.3V to (VA +0.3V)
Input Current at Any Pin (Note 3) ±10 mA
Package Input Current (Note 3) ±50 mA
Power Consumption at TA = 25 See (Note 4)
ESD Susceptibility (Note 5)
Human Body Model2500V
Machine Model 250V
Charge Device Model 750V
Junction Temperature+150
Storage Temperature −65 to +150
DescriptionThe ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference. The reference voltage can be varied from 1.0V to VA, with a corresponding resolution between 244µV and VA divided by 4096.
The output serial data is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE™, and many common DSP serial interfaces. The differential input, low power consumption, and small size make the ADC121S705 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications.
Operating from a single 5V supply, the supply current when operating at 1 MSPS is typically 2.3 mA. The supply current drops down to 0.3 µA typically when the ADC121S705 enters power-down mode. The ADC121S705 is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of −40°C to +105°C and clock rates of 8 MHz to 16 MHz.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| ADC121S705CIMM |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
| ADC121S705CIMMX |
CMOS7 |
0 |
16561 |
0 |
0 |
954000 |
4 |
270700104 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
Design Tools
| Title |
Size in Kbytes |
Date |
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| Evaluation Systems |
43 Kbytes |
29-May-2008 |
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The ADC121S705 is a 12-bit, 500 kSPS to 1 MSPS sampling Analog-to-Digital (A/D) converter that features a fully differential, high impedance analog input and an external reference.
The reference voltage can be varied from 1.0V to VA,with a corresponding resolution between 244V and VA divided by 4096.
The output serial data is binary 2's complement and is compatible with several standards, such as SPI™, QSPI™, MICROWIRE ™, and many common DSP serial interfaces. The differential input, low power consumption, and small size make the ADC121S705 ideal for direct connection to transducers in battery operated systems or remote data acquisition applications.
Operating from a single 5V supply, the supply current when operating at 1 MSPS is typically 2.3 mA. The supply current drops down to 0.3 A typically when the ADC121S705 enters power-down mode. The ADC121S705 is available in the MSOP-8 package. Operation is guaranteed over the industrial temperature range of −40°C to +105°C and clock rates of 8 MHz to 16 MHz.
ADC121S705 Data Sheet
