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| Place of Origin | Call |
| Brand Name | Analog Devices |
| Certification | ROHS |
| Model Number | AD7942BRMZ |
Product Details
The AD7942 is a 14-bit, charge redistribution, successive approximation PulSAR® ADC that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 14-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, VREF, is applied externally and is set up to be the supply voltage. Its power scales linearly with the throughput.
14-bit resolution with no missing codes
Throughput: 250 kSPS
INL: ±0.4 LSB typical, ±1 LSB maximum (±0.0061% of FSR)
SINAD: 85 dB at 20 kHz
THD: −100 dB at 20 kHz
Pseudo differential analog input range
0 V to VREF with VREF up to VDD
No pipeline delay
Single-supply 2.3 V to 5.5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Proprietary serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible1
Daisy-chaining for multiple ADCs and busy indicator
Power dissipation
1.25 mW at 2.5 V/100 kSPS, 3.6 mW at 5 V/100 kSPS
1.25 μW at 2.5 V/100 SPS
Standby current: 1 nA
10-lead package: MSOP and 3 mm × 3 mm LFCSP
Pin-for-pin compatible with the 16-bit AD7685
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process controls
The AD7942 is a 14-bit, charge redistribution, successive approximation PulSAR® ADC that operates from a single power supply, VDD, between 2.3 V to 5.5 V. It contains a low power, high speed, 14-bit sampling ADC with no missing codes, an internal conversion clock, and a versatile serial interface port. The part also contains a low noise, wide bandwidth, short aperture delay track-and-hold circuit. On the CNV rising edge, it samples an analog input, IN+, between 0 V to VREF with respect to a ground sense, IN−. The reference voltage, VREF, is applied externally and is set up to be the supply voltage. Its power scales linearly with the throughput.
14-bit resolution with no missing codes
Throughput: 250 kSPS
INL: ±0.4 LSB typical, ±1 LSB maximum (±0.0061% of FSR)
SINAD: 85 dB at 20 kHz
THD: −100 dB at 20 kHz
Pseudo differential analog input range
0 V to VREF with VREF up to VDD
No pipeline delay
Single-supply 2.3 V to 5.5 V operation with
1.8 V/2.5 V/3 V/5 V logic interface
Proprietary serial interface
SPI-/QSPI-/MICROWIRE-/DSP-compatible1
Daisy-chaining for multiple ADCs and busy indicator
Power dissipation
1.25 mW at 2.5 V/100 kSPS, 3.6 mW at 5 V/100 kSPS
1.25 μW at 2.5 V/100 SPS
Standby current: 1 nA
10-lead package: MSOP and 3 mm × 3 mm LFCSP
Pin-for-pin compatible with the 16-bit AD7685
Battery-powered equipment
Data acquisition
Instrumentation
Medical instruments
Process controls
Specifications
| Attribute | Attribute Value |
|---|---|
| Manufacturer | Analog Devices |
| Product Category | Analog to Digital Converters (ADC) |
| Series | PulSAR® |
| Product | Analog to Digital Converters |
| Type | S/H ADC |
| Packaging | Tube Alternate Packaging |
| Unit-Weight0 | 0.005051 oz |
| Mounting-Style | SMD/SMT |
| Package-Case | 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) |
| Input-Type | Pseudo-Differential |
| Operating-Temperature | -40°C ~ 85°C |
| Features | - |
| Number-of-Channels | 1 Channel |
| Supplier-Device-Package | 10-MSOP |
| Sampling-Rate-Per-Second | 250k |
| Data-Interface | SPI, DSP |
| Number-of-Bits | 14 Bits |
| Voltage-Supply-Analog | 2.3 V ~ 5.5 V |
| Voltage-Supply-Digital | 2.3 V ~ 5.5 V |
| Configuration | S/H-ADC |
| Architecture | SAR |
| Number-of-Inputs | 1 Input |
Resolution  |
14 bit |
| Reference-Type |
External |
| Ratio-S-H:ADC | 1899/12/30 1:01:00 |
| Number-of-A-D-Converters |
1 |
| Pd-Power-Dissipation |
12.5 mW |
| Maximum Operating Temperature |
+ 85 C |
| Operating temperature range |
- 40 C |
| Power-Consumption |
3.6 mW |
| Interface-Type |
Serial 3-Wire 4-Wire SPI |
| SNR-Signal-to-Noise-Ratio |
85 dB |
| Package-Case | MSOP-10 |
| Gain-Error |
+/- 6 LSB |
| Number-of-Converters | 1 Converter |
| Sampling-Rate |
250 kS/s |
| INL-Integral-Nonlinearity |
+/- 1 LSB |
| DNL-Differential-Nonlinearity |
+/- 0.7 LSB |
Descriptions
Who we are?
FAQ
Q: Are you trading company or manufacturer?
A: We are original manufacturer OF Integrated Circuit Chip . We can do OEM/ODM business.
Q: How long is your delivery time?
A: Group buying delivery time: 30-60 days; General delivery time: 20 days.
Q: What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery.
Q: How to buy your products?
A: You can buy the products from our company directly.Normally the procedure is sign the contract, payment by T/T,Contact the shipping company to delivery the goods to your country.
Q: What is the warranty ?
A: The free warranty is one year from the day of Commissioning qualified.If there is any fault for our products within the free warranty period, we will repair it and change the fault assembly for free.
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