Features
- Qualified to Renesas Rad Tolerant Screening and QCI Flow (Technical Brief)
- 8 buffered differential analog input channels with multiplexer
- Bypassable PGA with selectable gain (1 ≤ G ≤ 16)
- Fully differential bipolar operation
- Channel scan sequencer
- Full throughput rate with no data latency
- Excellent linearity: ±0.2 LSB DNL, ±0.4 LSB INL
- Low noise: 83.2dBFS (PGA bypassed), 77dBFS SNR (PGA Gain = 2)
- 5V AVCC supply and 2.5V/3.3V DVCC supply
- Analog input impedance: >1GΩ, <5pF
- Wide 50MHz -3dB input bandwidth
- Low power mode operation at lower sample rates
- High-speed SPI-compatible serial I/O
- Full military temperature range operation TA = -55 °C to +125 °C
- TID Radiation Lot Acceptance Testing (LDR: 0.01rad(Si)/s)
- ISL71148M30NZ: 30krad(Si)
- ISL71148M50NZ: 50krad(Si)
- SEE Characterization
- No DSEE for AVCC = 6.2V, DVCC = 4.6V, and VREF = 3.6V at 46MeV•cm2/mg
- SEFI <3.1μm2 at 46MeV•cm2/mg
Description
The ISL71148M is a radiation tolerant 8-channel high precision 14-bit, 900/480ksps SAR analog-to-digital converter (ADC). The ADC core is preceded by eight fully differential analog input channels, a buffered 8-to-1 multiplexer, and a programmable gain amplifier (PGA). The device features a peak SNR of 83.2dBFS when operating at 900ksps. With the PGA enabled, sampling rates up to 480ksps are supported. The PGA can be bypassed to increase the sample rate to 900ksps.
The product features 900/480ksps throughput with no data latency, excellent linearity, and dynamic accuracy. The ISL71148M offers a high-speed SPI-compatible serial interface that supports logic ranging from 2.2V to 3.6V using a separate digital I/O supply pin. The device is available in a 48-lead thin quad flat-pack (TQFP) space plastic.
The ISL71148M offers a separate low-power mode (LPM) pin that reduces power dissipation at lower sample rates. An external reference with a supported input range of 2.4V to 2.6V determines the analog input signal range.
Parameters
| Attributes | Value |
|---|---|
| Rating | Space |
| ADC | SAR |
| Analog Supply Voltage (V) | - |
| Channels (#) | 8 |
| Conversion Rate (Max) (kSPS) | 900 |
| Differential NonLinearity LSB | 0.2 |
| Integral NonLinearity LSB | 0.4 |
| Power Consumption (mW) | 90 |
| Resolution (bits) | 14 |
| SFDR (dBs) | 100 |
| Shutdown Mode | No |
| Temp. Range (°C) | -55 to +125°C |
| TID LDR (krad(Si)) | 30, 50 |
| DSEE (MeV·cm2/mg) | 43 |
| Flow | RT Plastic |
| Qualification Level | Radiation Tolerant Plastic |
| Die Sale Availability? | No |
| PROTO Availability? | No |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFP | 7.0 x 7.0 x 1.00 | 48 | 0.5 |
Applications
- Precision signal processing
- Propulsion, payload systems
- High-end industrial
- Engine control
- Down-hole drilling